Preamplifiers/Surround

Mcintosh MX110 tube tuner preamplifier, restored The McIntosh MX 110 combines in one unit an extremely low-distortion preamplifier with a highly sensitive FM multiplex stereo tuner. Every desirable feature of a tuner and a preamplifier is included in this design. Interstation noise suppression, tuning indicator, FM multiplex indicator, individual channel bass controls, individual channel treble controls and electronic phase switch have been engineered into the MX 110. Specifications Frequency response: 20Hz to 20kHz Total harmonic distortion: 0.2% Input sensitivity: 3mV (MM), 300mV (line) Signal to noise ratio: 80dB (line) Output: 300mV (line), 3V (Pre out) Dimensions: 16 x 5-7/16 x 13 inches Learn More

General Features and Specifications: - 20Hz-30KHz bandwidth - Slow start turn on sequencing - 12 dB gain line stage - Ultra accurate 38dB gain phono input - Discrete headphone amplifier - Massive high storage linear power supply - (2) 6SN7 tubes - Gold plated RCA inputs - Machined aluminum faceplate - 4 inputs (phono, line 1,2,3) - 1 pair fixed outputs - 1 pair variable outputs - All precision components - Heavy (2 ounce) copper circuit board - Fully tested, burned-in, and auditioned - Detachable IEC power cord - 18" W x 12.5"D X 4.5" H - power requirements: 120V or 230V - 50/60Hz - Entirely designed and hand built in the USA Learn More

Conrad Johnson ART 88 We have been dealers since the 1980's... Please phone (888)8504366 for price and availability We have sold CJ since the 1980's Learn More

Kondo Audio Note M10 Reference Preamplifier, mint Matching amplifiers available, phono stage sold separately in 2/2023 Excellent condition, one owner, crated Learn More

VTL 5.5 Signature II line stage, black excellent condition, box and remote Learn More

Conrad Johnson ET6SE like new cosmetics, box/manual/remote in 2/25 Learn More

Audio Research LS2B received from original customer has been serviced in recent years by someone else. I don't know what they did. In black Learn More

Conrad Johnson Art Series 2 In the original packing. $20000 retail amazing preamp, newer very good tubes owner's manual: https://conradjohnson.com/owners-manuals/artman.pdf Learn More

Balanced Audio Technology VK31se Learn More

Mcintosh C22 in 5/22 we must run this through the service department before selling Learn More

Aesthetix Janus Learn More

Audio Research SP6 B owner's manual link: file:///C:/Users/Steve/Downloads/SP6B_Manual_Schem.pdf Learn More

Vacuum Tube Preamp Learn More

Marantz 7 excellent condition. the unit is all original and works well. Learn More

Mcintosh C2500 like new, factory box complete in 1/25 pics soon Learn More

Excellent condition, all packing. We are CJ dealers ET7-S2 Enhanced-Triode Preamplifier The ET7-S2 enhance triode line-stage preamplifier has been designed to incorporate the advances made with the Series 2 upgrade to our flagship GAT into a more affordable model. The circuitry of the ET7-S2 follows closely that of the GAT Series 2. The audio circuit is elegant in its simplicity. An audio amplifier stage consisting of a single-ended triode amplifier provides the voltage gain. This amplifier stage is connected to the preamplifier outputs through a high-current MOSFET buffer, which achieves a very low output impedance, making the ET7-S2 extremely flexible in the choice of interconnect cables and amplifiers. DC voltage is supplied to the circuit by the revised discrete voltage regulator developed for the GAT Series 2. It isolates the audio circuit from the power line by maintaining negligible impedance across the audio frequency band. Infra-sonic noise is minimized by operating the tube filaments (heaters) on a dc voltage supplied by a separate regulated power supply. The ET7-S2 also boasts the GAT’s convenience and ease of use. The unit features input selection and level adjustment by microprocessor-controlled relays, with controls available both at the front panel and via a full-function remote. All control functions of the ET7-S2 operate through microprocessor-controlled relays. For the level control, the relays select combinations from a network of precision, low-noise metal foil resistors to effect loudness and balance changes in 100 steps of approximately .7dB per step. All switching and adjustment can be controlled by the unit’s remote control. A Theater Mode, which passes the input signal through at unity gain, makes it simple to incorporate the ET7-S2 into a high quality home theater system without compromising its two-channel performance. Like its bigger brother, the GAT Series 2, the ET7-S2 is constructed from the highest quality, carefully selected parts for unrivaled sonic performance and reliability. Tubes have been selected for minimum noise and microphonics. CJD Teflon capacitors are used in the ET7-S2 for output coupling and post-regulator power supply storage. In the power supplies, all capacitors are of polypropylene or Teflon—there are no electrolytic capacitors anywhere in the audio circuits or their DC power supplies. The resistors in these circuits (including the two dozen level control resistors) are special low inductance, high-precision laser-trimmed metal foil resistors. Switches are sealed relays with gold-plated silver contacts. Input and output connectors are machined from oxygen-free copper, and are gold plated. For four decades, the conrad-johnson design team has been dedicated to creating audio components that do credit to music performances. Through meticulous engineering, careful specification of only the finest available component parts, and a painstaking attention to construction, we have created what we feel is a line-stage without rival in its class. We invite you to arrange an audition of the ET7-S2 with your conrad-johnson dealer to experience the extraordinary musical performance of this remarkable preamplifier. Learn More

Conrad Johnson ET5 excellent condition, original box/remote Learn More

Conrad Johnson GAT series II excellent with packing $26500 retail We are CJ dealers We can give you one with a one year factory warranty for $12500 We can voltage convert this for overseas customers at not charge Learn More

Sonic Frontiers SFL2 in 10/24 Learn More

Melos MA222 one owner since new in 12/24 pics soon microphonic when touching control (might be a tube, we haven't put it on our test bench yet) If interested inquire. Learn More

LAMM L2 Reference preamplifier (in service 5/25) Learn More

Audio Research SP20 preamp with phono in silver Learn More

Mcintosh C1100 tubed preamplifier and C1100 controller mint, original boxes, remote, cables,manual in 3/23 Learn More

Jadis DPL2 Serivced 5/2020 and will be gold replated before shipping Learn More

Jadis DPL Learn More

Jadis JP80MC in 12/24 excellent Learn More

Balanced Audio Technology VK50se with remote and box sold? from Stereophile: https://www.stereophile.com/tubepreamps/1299bat/index.html Description: Tubed line-stage preamplifier. Tube complement: 8 BAT 6H30 Reflector SuperTubes. Inputs: 5 balanced on XLRs. Outputs: 2 balanced on XLRs (pin 2 hot). Tape output: 1 on XLRs. Maximum voltage gain: 17dB. Volume-control resolution: 0.5dB steps, 140 steps total. Frequency range: 2Hz-300kHz. Minimum input impedance, each phase: 100k ohms. Output impedance: 200 ohms. Minimum power-amplifier input impedance (with optional Six-Pak): 3k ohms. Noise: -110dB unweighted. Distortion: 0.005% at 2V RMS output. Crosstalk: -95dB at 10kHz. Maximum output: 50V RMS. Absolute polarity: switchable. Dimensions: 19" W by 5.75" H by 15.5" D. Weight: 38 lbs. $7000 retail Learn More

Audio Research Reference 3 excellent condition one owner good tubes Learn More

Jadis JPL restored six months ago, new tubes then in 4/23 Learn More

Tara Labs Space & Time Passage excellent condition, one owner, original box/packing/manual serviced 6/18 with newer, better electrolytic capacitors Learn More