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Preamps
( 216 Preamps sorted by Price High to Low.)
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ART Pro MPA (Modified)
# 34295
Stereo Mic Tube Preamp, Super Fi modified for audiophile tube preamp -(higher gain/lower noise, tube, eq, pad, RF PS, mic front preamp mods). All in one Microphone preamp, Harmonic Enhancement controller, tube compressor design. The ART PRO MPA when fully modified is $990. It is truly still unique for some of the clever adjustment capabilities. The most obvious is the ability to adjust the level and phase of a very euphonic second harmonic distortion which is then gain rided. The preamp can sound thick, punchy, dense, edgy, silky, warm, strident, etc. It’s not just equalization… it is an alteration and enhancement of the original audio signal. . . .. Read more about it here.
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ART Pro MPA (Engineering Sample)
# 40839
Stereo Mic Tube Preamp, Super Fi modified for audiophile tube preamp -(higher gain/lower noise, tube, eq, pad, RF PS, mic front preamp mods). All in one Microphone preamp, Harmonic Enhancement controller, tube compressor design. The ART PRO MPA when fully modified is $990. It is truly still unique for some of the clever adjustment capabilities. The most obvious is the ability to adjust the level and phase of a very euphonic second harmonic distortion which is then gain rided. The preamp can sound thick, punchy, dense, edgy, silky, warm, strident, etc. It’s not just equalization… it is an alteration and enhancement of the original audio signal. . .. Read more about it here.
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ART Tube Pac
# 41325
XLR 1/4 in ins and out w/ phantom power - 1/2 rack/desktop design - bench tested (modified unit for shop use Bench 1)
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SAE Mark 1B
# 43246
Stereo pre and equalizer. Inputs: Phono 1 & 2, Aux 1 & 2, tuner. 3 tape monitor loops, 2 speaker sets, balance and gain controls, 7 band equalizer. Cap + Coil circuit. Class A Transistor design. Resoldered boards at equalizer circuit. #8- condition with minor scratches on top cover. Power switch is permanently on. RFI CAPS, New Transistors, Power supply caps updated 11/24. All controls cleaned.
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ART USB Phono Plus v2
# 50998
With headphone monitor and level control. New in box with Audacity recording software and user manual. (AP shop tester)
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Ashly SC-44 "Keyboard Input Processor"
# 51396
4-channel mixer with 3-band sweepable equalizer per channel, PA send, and separate monitor send. 3-rack space unit. Needs board soldering (old foam corroded foils, requires major take apart 02/25)
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NAD 1300
# 61197
Pre amplifier, superior design, gunmetal gray, rack mount with rack handles, excellent phono stage, MM + moving coil class A fet design, eq circuit with turnovers (3), (bass 50/120/250 treble 3K/6K/12K), external processor (EPL loop), cosmetics excellent, low use, all control switches cleaned, #9
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SAE P102
# 9224
Stereo preamp, programmable tone settings, 2 rack space, re-enforced all ground connections on RCA jacks and cleaned and serviced, excellent condition
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Sumo Athena Preamp
# 9763
Total discreet class A circuits throughout, shielded transformer, high quality level control and switch $800 for complete Sumo System, Polaris amp, Athena Preamp, and Aurora Tuner
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Luxman 5C50
# 70414
Super Quality Preamp, Much class circuit design, (2) new upgrade quasi op amp circuit for phono section. (2) other modules (original) have been opened and re-soldered mini circuit board, double up on Mylar preamp coupling caps. Excellent Noise Floor, MC transformer installed type 8020 40ohm load. Most caps replaced in power supply (small value types) All calibrations done for preamp module D. C. Offset, new status bulbs. case and cover has few minor scuffs, Face is #9 Very low use machine #8+ condition
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Bryston 1B
# 943207
Make an offer. In: Tape1/Tape2/Aux/Tuner/Phono 1 and 2. Ruggedized and fixed AC wiring. Complete, intact, working unit. Cleaned controls with AG cleaner. All channels calibrate +- 1db, with a 88db noise floor. Cleaned corrosion on board, fuse, and connectors. 220 Volt operation. #8- condition
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ART PRO MPA II
# 57639
Variable impedance. Two channel MIC/HIZ. M/S Matrix. Variable plate voltage switch. QC Lubed, exercised, burn-in. #10 Condition (New)
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Bellari 220 Dual Mic Pre
# 22546
Dual Mic preamp - Full mods (RFI, Front End Pad, Impedance/Transformer-Higher output level/lower noise, PS, Hi Filter, High Freq slight harmonic distortion, plate saturation, chassis flownoise) - super quiet
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Onkyo P-3150 V
# 57891
Better quality phono, tone control slider a little sticky, but works, special enhancement EQ control. #7, missing front bezel. 7 inputs.
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PS Audio 5.6
# 73235
Stereo Preamplifier. Phono, 2 tape in, 3 line inputs. Super quality built machine. High quality parts. Socketed Op Amp, OP 37 & LT 115. Controls/ connectors all cleaned, fully tested. Handles have slight metal discolor but otherwise very little signs of use/ wear. #9 condition
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If you are having trouble finding parts, enter the name into our search bar at the top of the page. Please be aware there is a minimum $4-$6 to ship any part. International orders will be $24-$26 to ship for anything larger than an envelope. Shipping costs are non negotiable, so please, PLEASE do not ask for a part, or for us to search for, or quantify a part if you cannot pay for the shipping.
ART MP/C
# 73002
High quality Mic-preamp and tube/ vactrol compressor. One time rental. Box packing. Condition 9
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Sonic Frontiers Line 1 Amp
# 63522
Tube preamplifier, with a spare E88CC tube and garden hose style Essence AC cord. This unit has (4) JJ 6922 tubes from original design, and (2) 6DJ8 vintage (looks to be Mullard from Great Britain) installed in later stage for better harmonic distortion levels (about . 1%). This unit is in #9+ condition!
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Realistic 42-2930
# 27652
Phono Preamp - Solid State Stereo Pre-Amplifier, Small wall or cabinet mount box. Single Stere input/output device powered by AC line cord.
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Technics SU-9200
# 27655
Stereo Preamp, Excellent condition, very good cosmetic, Stereo Control Center, Inputs-(Tuner, 2 aux, 2 phono, 2 tape monitor loops) gain control for phono 2 / 20db Mute Switch, phono impedance controls, Toned dereat, L/R bass and treble controls, bass and treble filters, stereo, reverse L+R, L, R, Mode switch, sounds like/design similar to MAC preamps (individual resistor/circuits for tone control) highest quality parts used.
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Technics SU-9070 Preamp
# 38159
Stereo Preamp, complete, excellent mechanical and cosmetic condition. Ruggedized, updated, cleaned and calibrated. Nice Unit.
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Kenwood KC209
# 38917
Control Preamp w/remote, 7 band program band EQ, nice FIP readout, cleaned and tested OK
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MCM Model 40-630 Solid State Stereo Phono Pre-amplifier
# 70434
Basic phono preamp, 1 stereo input, 1 stereo output, Black case (4"x2. 5"x1. 5"), Good condition (#9)
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Advent MPR-1
# 41990
Pre-amp with 2 1/4" inputs, 2 RCA outputs (male cable end, 10" long), 18 VDC RCA power cable, can use 2 stacked 9v batteries for PS. Includes 2 dynamic mics with long 25' cables, black, slick design. 1/4" splicing block installed on pre, can be removed upon request. Please inquire for more info.
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Yamaha PG1
# 72736
Full feature unit with effect send levels IN/OUT Guitar Preamp with Guitar distortion, multiband EQ, 2 channel switching, double spring reverb, (modified to make rugged and dampened spring pan for cleaner brighter spring sound, nice shorter delay / decay spring). Original spring pan. 1/4" & XLR outs. #8+ condition
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Phase Linear 2000
# 62240
Nice, basic preamp, EQ, updated with TL075 op amp for tone controls (lower distortion, noise), did 250pf and 18k resistors on all input jacks for RFI protection, did 50pf RFI protection on phono input, revised more correct grounding for phono input, updated power supply capacitors and improved grounding, nice face, not original bass controls, # 8 + condition
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Email us at sales@audioproz.com or call (617) 926-8020 for more information about ADA modifications and repairs.
Demeter VTMP-2A
# 44032
Tube mic preamp modified by AudioPro. Modified gain and second order harmonic distortion for in-phase/out-of-phase harmonic. All variable gain drive for mic preamp and variable tube harmonic enhancement.
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Pioneer SPEC-1
# 47386
Full function stereo pramplifier, silver face, 120/240v switchable, fully cleaned and tested, truly excellent cosmetic condition.
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Amek System 9098
# 48664
High performance, solid state design, single channel, one rack space unit. Microphone preamp and equalizer can be used independently. All connections are balanced XLR. Excellent #9+ mint condition, includes manual, original box & packing.
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ART USB Dual Pre PS
# 52232
Project Series two channel microphone preamp and USB audio computer interface. Fully balanced XLR and 1/4" TRS inputs. New in box.
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Carver C-1
# 52481
Stereo w/sonic holography, inputs: 2 aux, tuner, 2 phono (1 for MM & MC), stereo/mono switch, speakers on/off, 2 tape/monitor loops, dubbing 1 to 2 & 2 to 1, loudness, tone on/off, 2khz & 8khz turnover switch, separate bass & treble for each channel, power switch is not operational. Switch jumpered to lessen noise in pre amp.
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