Audio Products

Preamplifiers
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Altair II

The front panel of Altair II features a new touchscreen control, which allows all functions to be adjusted directly from the front panel. The enhanced contrast and large font sizes used on the touchscreen allow it to be seen from across a room. Machined remote control An elegant new remote control, machined from aluminum billet and wrapped in leather, provides immediate access to the most commo...[more]

Mono solid state preamplifier

Andromeda

The Revelation Series bridges a gap in the Constellation Audio product hierarchy. Building on the Inspiration tradition and offering improved performance due to the use of carefully selected parts, the Revelation Series is a logical step up from Inspiration. Its distinctively Constellation casework design draws upon the heritage of the Reference Series and extends the foundation first used in I...[more]

Stereo solid state phono preamplifier

CTA305

For low level voltage amplification, valves are in a league of their own with respect to linearity and musicality.  For nearly a decade, COPLAND has contributed to the refinement of amplification using these classic devices. The CTA 305 employs reliable E83CC valves selected after ageing to assure optimal compability.             Each class A lin...[more]

Stereo valve preamplifier

DPMC

This integrated preamplifier produces a visual effect of abundance through its colours, forms and the optimal use of space. ...[more]

Stereo valve phono preamplifier

E-Glo

To ensure the utmost flexibility, to ensure perfect matching to a wide range of cartridges, the E-Glo provides capacitance loading for moving-magnet types in six user-switchable steps from 47pf to 900pF. ‘The loading resistance for moving-coil cartridges is continuously adjustable,’ says Lichtenegger, ‘as we already have on our Phono Box RS.’ Ensuring quiet operation is ...[more]

Stereo valve phono preamplifier

E-Glo S

Elegant high-end tube phono pre-amplifier with ultra slim design! E-glo S – is a hybrid phono preamplifier that utIlizes ECC83 tubes (twin triode) in the first and second gain stages In order to get higher gain and lower noise we use in the first stage a cascode connection of tube with with two paralelly connected low-noise J-FET transistors. RIAA curve is equalised fully passive ...[more]

Stereo valve phono preamplifier

EVO 100 Preamplifier

The EVO Tube Preamplifier is the newest version of the original first high-quality tube product. The PrimaLuna EVO Tube Preamplifier main features: 1. Hand-made construction of a heavy-gauge, fully-vented steel chassis with a five coat finish, each coat hand-rubbed and polished, holding the finest point-to-point wiring, using workmanship that is normally only available at the highest pr...[more]

Stereo valve preamplifier

EVO 200 Preamplifier

The EVO Tube Preamplifier is the newest version of the original first high-quality tube product. The PrimaLuna EVO Tube Preamplifier main features: 1. Hand-made construction of a heavy-gauge, fully-vented steel chassis with a five coat finish, each coat hand-rubbed and polished, holding the finest point-to-point wiring, using workmanship that is normally only available at the highest pr...[more]

Stereo valve preamplifier

EVO 300 Preamplifier

The EVO Tube Preamplifier is the newest version of the original first high-quality tube product. The PrimaLuna EVO Tube Preamplifier main features: 1. Hand-made construction of a heavy-gauge, fully-vented steel chassis with a five coat finish, each coat hand-rubbed and polished, holding the finest point-to-point wiring, using workmanship that is normally only available at the highest pr...[more]

Stereo valve preamplifier

EVO 400 Preamplifier

The EVO Tube Preamplifier is the newest version of the original first high-quality tube product. The PrimaLuna EVO Tube Preamplifier main features: 1. Hand-made construction of a heavy-gauge, fully-vented steel chassis with a five coat finish, each coat hand-rubbed and polished, holding the finest point-to-point wiring, using workmanship that is normally only available at the highest pr...[more]

Stereo valve preamplifier

EVO100 Phono Preamplifier

·Premium parts like used in all our other models; wide bandwidth for great bass and extended highs; ceramictube sockets; Nichicon and DuRoch capacitors; 5AR4 tube-rectifier-circuitry; gold-plated panel mounted RCA input and output jacks. A 100% shielding Phono chassis where needed. SoftStart™ circuit for extended life of sensitive components, plus a reduced chance of tube f...[more]

Stereo valve phono preamplifier

Illusion

The Krell Illusion preamplifier is a dual monaural circuit design with the left and right channels afforded their own power supply regulation and individual full chassis sized boards. All signal gain is realized in surface mount topology using proprietary multiple-output current mirrors with nearly 500 times the open loop linearity of other designs. 1.5 MHz open loop bandwidth in a zero feedbac...[more]

Stereo solid state preamplifier

Illusion II

Circuitry Highlights: the Illusion II preamplifier is a dual monaural design with the left and right channels afforded their own power supply regulation and individual circuit boards. All signal gain is executed with surface mount technology using proprietary multiple-output current mirrors with nearly 500 times the open loop linearity of other designs. Featuring 700 kHz bandwidth in a zero fee...[more]

Stereo solid state preamplifier

JP200MC

Stereo valve preamplifier

JP7

Stereo solid state preamplifier

JP80MC

JP 80 MC This preamplifier creates a visual effect of abundance from the point of view of colours and forms as well as an optimal use of space. ...[more]

Stereo valve preamplifier

JPL

JPL  The sober and elegant JPL monoblock preamplifier, its protective grill and the height of the face plate masking its component parts, never fails to arouse our curiosity through its discreet appearance. This preamplifier is made up of three 12AX7 double triodes. The gain , of about 35 dB, is supplied by the first two tubes mounted in series. The last tube is used as a cathode follo...[more]

Stereo valve preamplifier

JPL MKII

The JPL will bring you an inherent sense of dynamic gradation, but also soundstage transparency and mastery over the elements of spatial resolution. I never felt that the Jadis was holding back or blunting the power and rise-time of orchestral peaks. I've never heard a preamp so convincingly delineate the dynamic range from soft to very loud. This is one of those rare products guarantee...[more]

Stereo valve preamplifier

JPS2

This preamplifier creates a visual effect of abundance from the point of view of colours and forms as well as an optimal use of space. ...[more]

Stereo valve preamplifier

K-15EX

http://robert-koda.com/file/rk/bro_k15.pdf ...[more]

Stereo solid state preamplifier

LS28 SE

The improvements in the LS28SE stem from what was learned during the creation of Audio Research’s Reference 160-series amplifiers. Very similar to the wire and parts changes incorporated in the REF6SE and REF PH3SE, the LS28SE also includes upgrading to the same proprietary gold coupling caps used in the REF6SE. These numerous and costly component upgrades elevate the LS28SE’s perfo...[more]

Stereo solid state preamplifier

Momentum Phonostage

Locked inside those grooves is the most realistic and natural sound one could ever experience. The Momentum Phonostage extracts every last bit of music hidden in this microscopic landscape. Combining the finest possible analog circuitry with the precision of digital control, the Momentum Phonostage offers vinyl lovers unmatched flexibility. Front panel pushbuttons control gain, loading ...[more]

Stereo solid state phono preamplifier

Momentum Preamplifier

A 300 VA power supply in a separate chassis isolates the preamp’s sensitive circuitry from electromagnetic interference and noise. Separate supplies power audio and control circuitry, so the control circuits are completely isolated from the audio circuits. The styling of the Momentum preamp perfectly complements the Momentum amplifiers, with copper accents to match the amplifiers&rsqu...[more]

Stereo solid state phono preamplifier

NHB-18NS

Instead of offering a preamplifier based on the same approach as that of our competitors, we at darTZeel chose to think differently, offering for the first time in the world what previously seemed impossible:  No contact or switches or relay of any kind for the selection of the sources. This revolutionary feature brings a new level of transparency. Instead of routing the signal through a...[more]

Stereo solid state phono preamplifier

Perseus Phono Preamplifier

Fully complementary circuitry: The Perseus's balanced audio circuitry is essentially two mirror-imaged preamp circuits, one to amplify the positive half of the audio signal, the other to amplify the negative half. The fully balanced design cancels the effects of interference-an important capability considering the low level of the signals inside a phono preamp-and also increases slew rate and f...[more]

Stereo solid state phono preamplifier

PH 9

Foundation PH9 Phono Preamplifier The PH9 phono preamplifier is a great pairing with most cartridge and turntable combinations. A trio of 6H30 vacuum tubes are at the core of a simple and clear signal path to provide the most transparent preamplification possible. Five different impedance settings allow for cartridge loading, which can be changed on the fly with the included metal rem...[more]

Stereo solid state phono preamplifier

Pictor

Constellation Audio, the renowned luxury goods manufacturer of high performance solid-state electronics, is pleased to announce the introduction of the new Revelation Series of components at CES 2017. CEO Dr. Murali Murugasu challenged his dream team of designers and engineers to develop a new series of Constellation Audio components that could deliver the essence of our renowned Performance Se...[more]

Stereo solid state preamplifier

Preamp 1.0

We like to say the Inspiration PREAMP 1.0 is distilled, not diluted. It embodies the essence of our earlier work while retaining the subjective musicality and objective performance that won so much acclaim for our previous preamps. The most vital technology in our preamps is the Line Stage Gain Module, a fully balanced amplification circuit that uses servos to maintain a pristine balance be...[more]

Stereo solid state preamplifier

Ref 10

The left side of the front panel contains a 7” (diagonal) interactive touch-screen display that allows the user to easily control almost all functions. After the initial turn-on sequence, the Volume, Input, Balanced/SE, Stereo/Mono, Phase 0/180, Balance (leftright) control, Mute/Operate, and Settings icon are clearly displayed. Touch the input displayed (such as Tuner), and all of the inputs...[more]

Stereo valve preamplifier

REF 6SE

Stereo valve preamplifier

REF Phono 10

REFERENCE PHONO 10 PHONO PREAMPLIFIER Vinyl record playback has been an integral part of Audio Research since our founding in 1970. Think back to the great phono stages built into the defining preamplifiers of their day, among them the SP3, SP6, SP8, SP10, and SP11. Even after the introduction of the compact disc in 1982, phono sections remained a revered part of our preamplifiers. The firs...[more]

Stereo valve phono preamplifier

Ref Phono 3SE

Stereo valve phono preamplifier

Relentless Preamplifier

Power Supply Highlights Positioned between the two audio channels, the power supply makes use of extensive electrical and magnetic shielding to keep radiated interference out of critical preamplifier circuits. Internal line conditioning circuitry filters RF noise on the AC power and compensates for asymmetric power waveforms and DC on the mains. Power for the preamplifier stages comes from ...[more]

Stereo solid state preamplifier

Virgo lll

The Virgo III is an evolutionary step from the former Virgo II and like its predecessor the new Virgo III uses a separate power supply for better isolation and lower noise. Compared to its predecessor, the Virgo III will provide improved remote control operation, smoother operation of front panel knobs, and new internal circuitry that allows a quicker warmup time for virtually instantaneous pea...[more]

Stereo solid state preamplifier

DiaLogue Premium Preamplifier
Award Winning Product

The DiaLogue Premium Preamplifier contains: -New front-end circuitry. The DiaLogue Premium uses three 12AU7 tubes per channel.  The result is even lower distortion and increased bandwidth.  The change in dynamic range is stunning!  Output impedance is lowered to only 256 ohms, allowing it to mate with every amplifier on the market that we know of, even some older Pass Labs mo...[more]

Stereo valve preamplifier

DPL

This preamplifier is enclosed in a case with extremely restrained lines. Its front plate is in polished aluminium. ...[more]

Stereo valve preamplifier

DPL2

DPL2   This preamplifier matches black with gold : the restrained lines of the case in black openwork metal, its front plate in polished aluminium, or as an option, in gilded brass as on the JPL. Sombre and luminous, mat and brilliant, the DPL 2 combines visual harmony with an insistant discretion. The signal processing is carried out by 2 double triode tubes, ECC82 and ECC 83, whi...[more]

Stereo valve preamplifier

DSPre

Like the DAC8, the DSPre offers the following:• Five digital inputs, including USB 2.0HS, AES/EBU, RCA, BNC, andToslink®, all of which are capable of decoding 24 bit/192k files.• Asynchronous USB.• Utilizes quad “monoblock DAC” architecture with dual low jitter mastercrystal oscillators to eliminate decoding and quantization errors, increasethe dynamic range, and ...[more]

Stereo solid state preamplifier

Evolution 202

Often overlooked, the preamplifier is a critical component in the signal chain. A small signal must be carefully amplified without damaging the ephemeral staging and dimensional components of the music. The Evolution 202, using a combination of advanced technologies and inspired design, elevates this task to an art form. Music emanates from an expanse that outlines the recording venue, transpor...[more]

Stereo solid state preamplifier

Evolution 222

The Evolution 222 brings the advanced technologies and inspired design of the Evolution 202 to single chassis format. Often overlooked, the preamplifier is a critical component in the signal chain. A small signal must be carefully amplified without damaging the ephemeral staging and dimensional components of the music. Heard through the Evolution 202, music emanates from an expanse that outline...[more]

Stereo solid state preamplifier

Evolution Two

All signal gain in the Evolution Two is realized in the current domain using proprietary multiple-output current mirrors with nearly 500 times the open loop linearity of other designs. Negative feedback is not used anywhere in the Evolution Two preamplifier, nor is it necessary. Open-loop distortion is typically less than 50 parts per million, and the open loop bandwidth extends to two megahert...[more]

Mono solid state preamplifier

GSPre

GSPre PREAMPLIFIER The GSPre is the nerve center of a system – not only directing signals and providing attenuation, but also interpreting and deciphering complex signals to create a musical story with the drama and intrigue befitting your favorite songs. The job of a preamplifier is to do its work discretely, leaving the musical signal with as little signature as possible ...[more]

Stereo valve preamplifier

JP30MC

Stereo valve preamplifier

JPP200

Stereo valve phono preamplifier

JPS8

Stereo valve phono preamplifier

KAV280p

The KAV-280p is a superb sounding stereo preamplifier that brings the dynamics and resolution of separate components to the KAV Series. Balanced, direct-coupled circuitry is utilized from input to output, and the level attenuator is accomplished with a unique, digitally controlled analog circuit. Balanced and single ended inputs and outputs are supported. The custom-machined aluminum enclosure is ...[more]

Stereo solid state phono preamplifier

KCT

This circuitry protects the audio signal from voltage as if the signal is in a tunnel, providing the signal with a sheltered conduit for internal signal transmission in the current domain. At the output stage, CAST technology provides the most accurate signal transfer from one component to the next. As a stereo preamplifier, the KCT delivers state-of-the-art music reproduction to either of two in...[more]

Stereo solid state preamplifier

KID

Ultra low noise volume control, with digitally-controlled analog bass and treble controls fine-tune your listening experience. A self-locating top loading cradle for the iPod-device, and a full-function remote control make operation flexible.Balance and single ended outputs, composite and s-video outputs, and an RS-232 control allow for a variety of connection options. The KID deliver...[more]

iPod preamplifier

KPE

The KPE Standard Phono Preamplifier accommodates moving coil and moving magnet phono cartridges. Highlights Composite circuitry applies dual cascaded amplification levels to provide high gain (64.5dB) with low noise (-71dB for moving coil and -89dB for moving magnet) to create astonishing imaging and the high resolution of low-level details. A wide range of impedance selections allows the user to...[more]

Stereo solid state phono preamplifier

KPE Reference Phono preamplifier

The Reference KPE is optimized for use with moving coil phono cartridges. The Reference KPE comes factory set with a 70 dB gain and a 100 Ohm load impedance setting. The available gain settings include 58, 64, 70, and 76dB. Cartridge loading choices include 10, 25, 47, 100, 249, 475, 825, and 1000 Ohms. ...[more]

Stereo solid state phono preamplifier

LP 1

The LP1 is a departure for us in both size and series designation. The chassis is a compact 13” wide, by 8.6” deep, by 4.5” high. The front panel has the inset Audio Research logo with an engraved line completing the panel, but no handles.  There are simply two switches for Power/Off and Mute/Operate. The entire chassis is silver, and the front panel is only available in Nat...[more]

Stereo valve preamplifier

LP1 Hybrid Stereo Phono Preamplifer

The LP1 has 47dB of gain, perfect for higher output (>1.0mV) phono cartridges. It is a hybrid design utilizing one 6H30 tube, special low noise JFETs, custom Audio Research designed power transformer (made in the U.S.), and multiple stages of regulation. There is no overall feedback, and it is non-inverting.  Inputs and outputs are single-ended. Controls are as simple with switches for Pow...[more]

Stereo valve phono preamplifier

LS12

Building on our thirty year tradition of designing electronics of the highest quality and value, Audio Research is pleased and very excited to introduce the LS12 stereo preamplifier, which bridges the usual gulf between solid-state and vacuum-tube sound, sonically outperforming the competition anywhere near its retail price.   The LS12 represents a major advance in solid-state circuit design ...[more]

Stereo solid state preamplifier

LS16 MKII

Since its introduction in 1999, the LS16 has been a best-seller, combining a relaxed, engaging musicality with good flexibility and connection options. So why change a good thing? Well, the enhancements introduced in the Mark II versions of both the Reference 2 and LS25 have proven so popular that we feel it is time to incorporate many of the same technological improvements into the LS16MKII.Funct...[more]

Stereo valve preamplifier

LS17

On the front panel, the changes are more obvious. A new linear LED display provides a 20-lamp display for the 104-step volume control, as well as indicators for selected input and muting. One rotary control is provided for volume adjustment, while a second controls input select. Pushbuttons are provided for power, monitor, processor (unity gain) and mute. All functions are also accessible via the ...[more]

Stereo valve preamplifier

LS17SE

The LS17 SE maintains the same physical size as its predecessor.  The only cosmetic difference is the updated front panel which replaces the black plastic buttons with round metal buttons, complementing the symmetry of the two control knobs flanking the LED display.  The display shows volume as well as which input is selected.  Front panel controls include power, monitor, mute and p...[more]

Stereo valve preamplifier

LS25 MKII

The LS25 MKII vacuum tube stereo line preamplifier offers sonic performance, functional flexibility and value second only to the world-renowned Reference One preamplifier. Chassis construction is like the REF1, with finished slab sides and heavy top and bottom covers; chassis height and depth are slightly reduced, however. Front-panel control layout is also familiar: microprocessor-controlled r...[more]

Stereo valve preamplifier

LS27

The LS27 not only offers remarkable resolution, musicality and dynamic impact, it is Audio Research's most flexible line-stage and able to adapt to most any situation. In terms of control options, the LS27 has selectable High / Medium / Low gain settings for each input, BAL / SE input selection, Left-Right Balance control, Invert (phase), and Stereo / Mono selection. Tube hours can be monitored, t...[more]

Stereo valve preamplifier

LS28

LS28 Line Stage Preamplifier The LS28 line stage is a flexible and intuitive preamplifier. Four balanced and four single-ended inputs, and two sets of both balanced and single-ended outputs, allow maximum connectivity. The straightforward menu allows control of numerous parameters, including input naming, tube hours, auto shutdown, and home theater passthrough. Phase invert and mono a...[more]

Stereo valve preamplifier

LS8 MKII

The new LS8 MKII is a pure Class-A circuit design with a large, fully-regulated power supply and is hand-assembled to the same critical standards as other Audio Research products. MKII component improvements include new regulator FET devices, higher-quality resistors, new Infinicap(r) coupling capacitors and our latest selected 6922 twin triode vacuum tubes. Mechanically, the MKII incorporates new...[more]

Stereo valve preamplifier

Papa Dock

The Papa Dock is a dedicated power amplifier for the Krell KID iPod dock. Based on classic Krell amplifier technology, the Papa Dock mates directly with the KID and supplies an impressive 150 watts of power. Coupled together, the Krell KID/Papa Dock pair work as one to deliver audiophile performance to any iPod listener. Externally simplistic but internall...[more]

iPod preamplifier

PH3

The PH3 is a phono preamplification stage intended for use with an active line-level stereo preamplifier. Fully single-ended from input to output, the PH3 uses a combination of J-FET input stage technology (for low inherent circuit noise) and class A operation vacuum-tube gain via three 6922 twin triodes. Total gain of the PH3 is 54 dB (non-adjustable). Used with typical line preamplifiers...[more]

Stereo solid state phono preamplifier

PH3 SE

The PH3 is a phono preamplification stage intended for use with an active line-level stereo preamplifier. Fully single-ended from input to output, the PH3 uses a combination of J-FET input stage technology (for low inherent circuit noise) and class A operation vacuum-tube gain via three 6922 twin triodes. Total gain of the PH3 is 54 dB (non-adjustable). Used with typical line preamplifiers having ...[more]

Stereo solid state phono preamplifier

PH6

The choices of the load are 47K, 1000, 500, 200 or 100 ohms. All functions are duplicated on the remote control. The rear panel includes a pair of single-ended inputs, a ground, and a 15A IEC connector. The PH6 is a hybrid (like PH5), with high-gain JFET input constant current and stadiuo stabilization without any counter-reaction. The PH6 uses four 6H30 twin triodes. Instead of replacin...[more]

Stereo valve phono preamplifier

PH7
Award Winning Product

The PH7 has 57.5 dB of overall gain, and features one pair of single-ended inputs and outputs. Full remote control is provided for all functions, coupled to an easily readable front-panel vacuum-fluorescent display. The display shows all selected functions including loading (47K, 1K, 500, 200, 100 ohms), as well as accumulated hours of operation. Display intensity can be adjusted to one of eight l...[more]

Stereo valve phono preamplifier

PH8

Operationally, the PH8 maintains the flexibility and ease of operation of its predecessor, with loading (47K, 1K, 500, 200, 100 ohms), Stereo/Mono, Muting andPower buttons under a vacuum fluorescent display that has eight selectable brightness levels. The display can be turned off, with nine small pixels remaining dimly lit to remind one that the supplied remote control. There is one set of single...[more]

Stereo valve phono preamplifier

Phantom

The crossover functionality offers the ability to use a subwoofer/satellite speaker arrangement and still maintain the highest quality sonic performance. Previous to the Phantom preamplifier, this system configuration would require signals to pass through a subwoofer's lower quality crossover circuitry. The Phantom preamplifier is the centerpiece of a world class audio system where space is at ...[more]

Stereo solid state preamplifier

Phantom II

Sharing the same audio circuitry as its bigger brother, the Phantom II preamplifier is a dual monaural circuit design with the left and right channels afforded their own power supply regulation and individual full chassis sized boards. All signal gain is realized in surface mount topology using proprietary multiple-output current mirrors with nearly 500 times the open loop linearity of other desig...[more]

Stereo solid state preamplifier

Phantom III

Circuitry Highlights The Phantom preamplifier is a dual monaural design with the left and right channels afforded their own power supply regulation and individual circuit boards. All signal gain is executed with surface mount technology using proprietary multiple-output current mirrors with nearly 500 times the open loop linearity of other designs. Featuring 700 kHz bandwidth in a zero feed...[more]

Stereo solid state preamplifier

ProLogue Premium - Preamplifier

Incorporating the best electronic elements of the original ProLogue Three, plus selected ground-breaking features from the more advanced DiaLogue Series, the next generation ProLogue Premium Preamplifier is an engineering marvel — setting a new benchmark in high-performance audio with the following features: *Home theater pass-thru. Straight from the critically-acclaimed DiaLogue Seri...[more]

Stereo valve phono preamplifier

Ref 10 Phono

The Audio Research Reference Phono 10 embodies everything we know about phono playback, and incorporates many of the insights gained in the development of the Reference Anniversary and Reference 10 line-stage preamplifiers. The Audio Research Reference Phono 10 is a true dual-mono design with totally separate signal paths for each channel, from the dual-mono power supply forward. There are sepa...[more]

Stereo valve phono preamplifier

REF 3
Award Winning Product

Introduced in the spring of 1998, the REF2 received a continuous stream of accolades from around the world. True to its name, it became the reference line-stage preamplifier, purchased new by a thousand music lovers and coveted by thousands more. With the MKII version having been introduced in 2000, it is time to push the performance envelope once again. We are proud to introduce the all new RE...[more]

Stereo valve preamplifier

REF 5

The REF 5 is the latest model in a series of the finest and most successful line-stage preamplifiers ever made. From the REF1 to the REF2 to the REF3 to the REF5, each one has built upon the legacy of its predecessor as the most sought-after reference level line-stage preamplifier. The REF5 clearly redefines the state of the art at a price that is not inexpensive but represents extraordinary value...[more]

Stereo valve preamplifier

REF 6

Concept The Reference Series from Audio Research was first introduced in 1995 and has been the ultimate representation of performance, musicality and power. Beginning with the Reference 1, the Reference 6 now continues the tradition of using the most refined circuit designs in concert with the highest quality parts and components. Numerous elements – transformers, capacitors...[more]

Stereo solid state preamplifier

REF ANNIVERSARY

Bound to become an "Audio Legend", truly remarkable.Ricardo FranassoviciIn April of 1970 Audio Research was founded as the sole American manufacturer of exclusively vacuum-tube preamplifiers and power amplifiers. Along the way, many Audio Research models became benchmarks and collectors’ items as the company steadily built a reputation for great performance and great value. It was never...[more]

Stereo valve preamplifier

REF Phono

The REF Phono stage is an all-vacuum-tube design.  Of the 14-tube total, eleven 6922 twin triodes are used in a unique single-ended signal path. High voltage rectification utilizes a 5AR4 / GZ34, while regulation is accomplished using a 6L6GC controlled by another 6922.  For the analog music purist, this is the phono stage to make everyone happy!  Using chassis construction and dime...[more]

Stereo valve phono preamplifier

REF Phono 2SE

The Audio Research Reference Phono 2 SE offers an extensive feature set. There are two separate sets of inputs, with selectable gain between Low (51dB BAL / 45dB SE) and High (74dB BAL / 68dB SE). There are seven loading selections including 47K, 1000, 500, 200, 100, 50 ohms, and Custom, which we can factory-set according to your need. In addition to standard RIAA phono equalization, the Reference...[more]

Stereo valve phono preamplifier

REF Phono 3

Audio Research founder William Z. Johnson was never one to follow popular trends; Audio Research began building vacuum tube components as transistors were replacing tubes for their low cost and simple maintenance. But the fact remained that vacuum tubes simply sounded better. Digital technologies arrived in the mid-1980’s, and offered a level of convenience and low maintenance...[more]

Stereo valve phono preamplifier

REF Phono2

Physically, the Reference Phono 2 is similar to the other Reference preamplifiers, with slab side panels, a vacuum-fluorescent display, and the same height and depth as its predecessors. The front panel has six control buttons for Power, Input, Gain, Load, RIAA and Mute. New silver handles are standard on natural-anodized units, while black handles come with black-anodized units. For owners wan...[more]

Stereo valve phono preamplifier

REF2 MKII

The ebb and flow of a bass line, percussive textures, and time changes now make more musical sense as you hear them revealed by the greater immediacy and dynamic freedom of the REF2MKII. Finally, the MKII presents the music with a solidity and focus and coherence that is simply not present to the same degree in the original. From top to bottom, then, the REF2MKII is a another advance of the state ...[more]

Stereo valve preamplifier

REF5SE

Introduced in May and June 2009, the REF5 and REF Phono 2 are sufficiently mature to warrant an update.   Beginning immediately, the REF5 and REF Phono 2 (RP2 for brevity) are being updated to SE status, with greatly enhanced performance and the latest cosmetics. Non-SE versions will no longer be available. The upgrades are applicable to both REF5SE and RP2SE. The most obvious change is to...[more]

Stereo valve preamplifier

SP16

The power cord is our standard removable IEC. The most important control functions of the SP16, including Power, Mute, Processor, Input select, and Volume Up/Down, are accessible on the right side of the front panel via six soft-touch buttons. On the left side of the front panel (mirroring the control function cutout on the right) is an LED display indicating Input, Processor, Mono, and Mute, with...[more]

Stereo valve preamplifier

SP16L

The SP16 is completely single-ended with five sets of inputs (labeled Phono, CD, Tuner, Video and Aux) plus a Processor pass-through. There are two sets of main outputs for flexibility, plus a Tape out. The SP16 has a 12-volt trigger to turn on power amplifiers or other equipment, and full remote control of all functions including power, input selection, stereo/mono, volume, and muting. The powe...[more]

Stereo valve preamplifier

SP17

The Audio Research SP17 features low-noise JFET inputs in both the line- and phono-stages, and instead of 12AX7s you will find a 6H30 in each section – all of our preamplifiers now employ this high performance long-life tube. The same high-voltage regulator found in the LS17 and LS26 is now utilized in the  Audio Research SP17, and so is the same 103-step volume control – the SP16...[more]

Stereo valve preamplifier

SP20

Also for the first time, the Input selector is on the left, the Volume control is on the right.Through the touchscreen one can change Inputs, select Stereo or Mono, Mute, adjust Phase, adjust left-right Balance, and adjust the phono input Load (50, 100, 500, 1000 or 47k Ohms). Through a Settings menu, you can customize other items: change input names, adjust gain offset for each input, change volu...[more]

Stereo valve preamplifier

Vanguard Digital Preamp

The Vanguard Digital Preamplifier is the first digital only preamplifier from Krell and it couples the latest in digital connectivity and technology with classic Krell analog circuitry. The Vanguard Digital Preamplifier features the same digital front end as the Vanguard Universal DAC and adds full volume control capability. The Vanguard Digital Preamplifier is a perfect centerpiece for an all ...[more]

Mono solid state preamplifier

Virgo II Preamplifier

Constellation Virgo II now includes the same power supply used for Altair. This supply offers numerous advantages. While the original Virgo’s power supply took electrical isolation to a high level with separate transformers and outputs for the audio and control circuits, the Constellation Virgo II supply enables true dual-mono operation, with separate transformers and outputs for left-cha...[more]

Stereo solid state preamplifier

Virgo Preamplifier

The core of the Virgo is Constellation Audio’s Line Stage Gain Module, a fully balanced preamplifier circuit that achieves essentially perfect balance between the positive and negative halves of the audio signal. The musicality and transparency of this circuit are unequalled in any other preamp available. The Line Stage Gain Module also makes possible the Constellation Link, a direct conn...[more]

Stereo solid state preamplifier
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