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Purveyors of Electronic, Musical
and Vintage goods
from then, now and in between.
STEREO AMPS & PRE-AMPS
Stereo
amps amplifiers & Pre-amps: Used
preowned pre-owned, Vintage Hi-Fi
Hifi stereo control
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![]() NEW ADDITION 12/23/09 (Click on above thumbnails to enlarge photos) YAMAHA STEREO PRE- AMPLIFIER Preamplifier C-80 C80 amp CONTROL AMP #04950 ANALOG PREAMP Circa 1984-85 "WORLD AC POWER" ™ MIJ for sale We have completely gone through this unit, cleaning inside and out including all contacts, switches and controls. This is difficult to do on these as it necessitates the removal of the face and associated circuit boards. All I/O internal solder points, "re-flowed" for trouble-free performance. Unit looks great! All functions tested for perfect operation. All inputs tested and both side produces clean and even sine waves! Checked with O-Scope. No power supply hum of any kind. It's dead silent! Yamaha C-80 Analog, Stereo Pre-amp / control center. Features include: - FULLY PARAMETRIC 2-Band EQ / Tone Controls. Bass centers variable from 31.5Hz to 800Hz and treble variable from 800KHz to 20kHz. "Q" variable wide to narrow. Amplitude variable ± 12 dB cut / boost (most tone controls only range ± 10 dB) - Absolute "Tone Bypass" for purest signal route - Variable Loudness. A mainstay trademark of Yamaha Pre-Amps and Receivers. Allows for continuously adjustable loudness contour. - Subsonic filter at 15Hz for reducing turntable rumble / feedback - Instant -20 dB Audio Level Muting - Dual tape monitors (Tape Monitors can also be used for Tape / Video / CD / DVD / VCR / DAT / iPod /MP3 / XM / SIRUS etc. as well as for CDR) (note; tape monitors combined with source selection, thus any external signal processors are relegated to the Pre's "Output" to Power Amp "Input" signal chain) - Bi-Directional dubbing - AUX Input (can be used for Video / CD / DVD / VCR / DAT / MP3 / Video / XM / iPod / SIRUS etc.) - DAD Input (can be used for Video / CD / DVD / VCR / DAT / MP3 / Video / XM / iPod / SIRUS etc.) - Tuner input (can be used for Video / CD / DVD / VCR / DAT / MP3 / Video / XM / iPod / SIRUS etc.) - Phono / Turntable input with rear located selectable gain @ either 0 or -10dB - Phono / Turntable input with selector for either MM (Moving Magnet cartridge) or MC (Moving Coil Cartridge) (this feature alone could be worth hundreds of $$ if you are going to utilize a Moving Coil turntable cartridge) - Cartridge capacitance selector on the MM side for 220 pf / 2/47kΩ, 330pf / 47k , 220pf / 47kΩ, 100Ω, or on the MC side 1kΩ or 100Ω - Record Out selector with bi-directional tape dubbing controls. (Separate "Record Out" allows recording from one source while you listen to another) - Global Stereo / Mono selector - 24 Karat Gold plated I/O jacks on the Phono, DAD and Main Outputs to remain corrosion free, thus insuring the best audio signal transfer. - 6 AC outlets ( 5 switched, 1 un-switched) for a total capacity of 600 watts - True "WORLD AC POWER"™ allows unit to be operated on 50 or 60 Hz AC and will select voltages from 110v, 120v, 220v and 240 volts AC input. Original Specs: Design type: 2 Channels, Analog operation Frequency Response: 20-20kHz +0 / -0.2dB Maximum Output Level: 8.5V THD; 0.001% at full rated power IHF IM DISTORTION; 0.002% Phono MM Sensitivity: 2.5mv for 5.0V output @ 1kHz Phono MM Maximum Input Level: 500mv S/N on Phono MM w/ 5mv signal: 95dB S/N on Phono MC w/ 5mv signal: 91dB Phono Capacitance: Selectable High Level Sensitivity (tuner, Aux, Tape) : 150mv This is a very high quality control / pre-amplifier for most any system. If you need high level sonics, the Yamaha C-80 is the ticket. Will work with most any power amplifier, tube or solid state. After bench work the unit looks, performs and sounds great! Besides the fact that it's a Yamaha, this unit stands in a class by itself due the the "fully parametric" EQ and it's versatile "phono" section. Again, great where you need power amp control, with super pure tone routing. Unit measures 17" wide x 3.25" tall x 14.5" deep and weighs 15 lbs unpacked. Includes our standard 90 day limited warranty. YAMAHA C-80 Condition 9 $649.
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![]() NEW ADDITION 7/9/10 (Click on above thumbnails to enlarge photos) TRIO-KENWOOD STEREO PRE AMPLIFIER AMP KC-105 KC105 / GRAPHIC EQ #...1545 Circa 1985-1986 MIJ SOLD 7/21/10 for sale We have completely gone through this unit, cleaning inside and out including all contacts, switches and controls. Unit looks like NEW! All functions tested for perfect operation. All inputs tested and both side produces clean and even sine waves! No power supply hum of any kind. It's dead silent! Versatile, and modern Kenwood KC-105 Pre-amp / Graphic EQ / control center. Features include: - Super quality Control / Pre-Amplifier - 7-Band, Graphic EQ - 7 frequency centers are as follows: 60Hz - 150Hz - 400Hz - 1kHz - 2.4kHz - 6kHz & 15kHz with ±10 dB - "EQ Defeat" function allows EQ / Tone controls to be bypassed for purest signal path - "EQ Record" function allows EQ curve to be imprinted to tape / recording - Tuner Input (may also be used for Video / CD / DVD / VCR / DAT / iPod / MP3 / XM / SIRUS etc.) - Phono / Turntable input - CD Input (may also be used for Video / CD / DVD / VCR / DAT / iPod / MP3 / XM / SIRUS etc.) - Video 1 Input (may also be used for Video / CD / DVD / VCR / DAT / iPod / MP3 / XM / SIRUS etc.) - Video / AUX Inputs (may also be used for CD / DVD / VCR / DAT / iPod / MP3 / XM / SIRUS etc.) - Dual Tape monitors with Bi-Directional dubbing (Tape monitors may also be used for Video / CD / DVD / VCR / DAT / iPod / MP3 / XM / SIRUS etc) (Tape 2 can also serve as a Signal Processor / Surround Sound processor access point / loop) - Loudness selector - One un-switched AC convenience outlet on rear panel with a capacity of 200 watts of accessories - Kenwood "System Control" jacks for use with other compatible Kenwood gear Specs: Design type: 2 Channels Frequency Response: 5-200kHz +0dB, -3dB Input Sensitivities: Phono - 2.5mV / 47KΩ All other inputs = 150mV / 33KΩ S/N: 86dB for Phono @ 5mV 'A' Weighted. Phono Max input level: 95mV THD: 0.003% at full rated output w/ 20-20kHz Again, we have completely gone through it cleaning all pots, contacts and switches and all functions test perfectly. Great control / pre-amplifier for just about any stereo system / power amp. Unit looks NEW and sounds great! Unit measures 16.5" wide x 3" tall x 10.5" deep and weighs 6 lbs unpacked. Includes our standard 90 day limited warranty. KENWOOD KC-105 Cond. 8.5 $229. SOLD 7/21/10 |
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![]() ![]() NEW LISTING 11/27/07 (click on above thumbnails to enlarge photos) AUDIO CENTRON / SLM POWER AMPLIFIER RMA-1000 RMA1000 PROFESSIONAL / STEREO STABLE INTO 2 OHMS! MADE IN THE USA! Circa 1986-94 for sale 2 rack space, Audio Centron, RMA-1000 power amplifier. Great for small "All-in-One" speakers, stage monitors, wedge monitors or running horns or mids in a Bi-Amp / Tri-Amp system or for running Low end / subs in mono-mode. Features: - Stable down to 2 Ohms! - - Power rated as follows; 8 ohms = ~100 wpc 4 ohms = 150 wpc 2 ohms = 220 wpc - 2-Rack spaces high with built-in rack ears and carry handles - Cooling fan for those demanding "2 & hard 4 ohm conditions" - Relay protection against "turn-on / turn-off" transients - Dual, Front mounted, independent input attenuators - Dual, LED Signal, Limit and Protect indicators - Thermal protection with "Fault" LED indicators - XLR and 1/4" phono input signal I/O's - Speaker outputs via 3-Way binding / banana posts and 1/4", "all metal" phono jacks - Stereo / Bridge-Mono selector - "REAL" TO-3, Metal cased output transistors - Rear mounted main AC fuse - Grounded AC input cord While this unit was originally rated at ~100 wpc @ 8Ω, on our test bench, both this unit's amplifiers produced peak power of 30 volts per channel for 112 watts per channel @ 8 Ω via discrete output & 27.7 volts per channel for 192 watts per channel @ 4 Ω via eight discrete, Motorola, Metal cased, (TO-3) MJI5002 & MJI5001 outputs. Unit works great. Only minor issue is that the "Channel B" input attenuator has a blank spot in the first 40% that does not respond to cleaning. Not an issue once you have amp up to operating level. We have completely gone through the unit cleaning and testing all. SPECS: - Stable down to 2 Ohms! - Output Power ratings (stereo mode): 8 ohms = ~100 wpc 4 ohms = 150 wpc 2 ohms = 220 wpc - Bridge / Mono mode operation ( 440 watts @ 4 ohms) On our test bench, both amplifiers produce perfectly clean and symmetrical sine waves at both 8 & 4 ohm loads. We tested both internal amplifiers to the above specs, and found them accurate. This is a great performing, fan cooled amp. Measures 19" wide x 16.5 overall depth / 13.5" rack depth x 3.5" tall and weighs 35 lbs unpacked. Includes our standard 90 day limited warranty. AUDIO CENTRON RMA-1000 Condition 8 $249. |
![]() ![]() NEW ADDITION 7/9/10 (Click on above thumbnails to enlarge photos) TRIO-KENWOOD KM-105 / KM-106 #...0676 KM105 KM106 POWER AMPLIFIER amp Circa 1985-86 MIJ We have complete gone through this unit and bench checked / tested it. Amp has been cleaned inside and out. All functions have been tested and pass with flying colors! Amp designed using Huge Power Supply Transformer and oversized, vertical finned heat sink for very efficient and silent, passive cooling of output devices. This amplifier is in both great electronic and physical shape. Looks LIKE NEW and sounds fantastic! All inputs tested and both side produces clean and even sine waves! No power supply hum of any kind. It's dead silent! Following restoration procedures, we burned it in, in the shop at continuous high volume for 4 hours straight and it functioned flawlessly. On our test bench, this unit's amplifiers produced 37.75 volts at 8 ohms per channel for 178 watts / channel and 31.75 volts at 4 ohms per channel for 252 watts / channel via Sanken 2x 2SA1215 & 2x 2SC2921 discrete output transistors. Great, later model power amp by Kenwood. Model KM-105 (same specs / design as model Kenwood KM-106. Branded for two different markets). HUGE power output! Excellent for 2-channel (stereo) audio listening or for use in an A/V system. Lots of punch and headroom. Features: - 2- Channel stereo operation - A or B speaker selector via high current relay - Dual, Vertical, 7-Segment LED Power Output Meters with Dual Position Level Selector - Built-in Protection circuit - LED Status indicators - Front-mounted 1/4" stereo headphone jack - RCA input jacks - Dual, vertical finned internal heat sink - Oversize power supply transformer - 3 Rear-mounted AC convenience outlets (2 switched and 1 un-switched for a total capacity of 200 watts) Original Specs: Design type: 2 Channels, AB operation Damping Factor @ 1kHz / 8Ω: 35 Rated RMS Output: 125 watts per channel, min. RMS, at 8 ohms, both channels driven, from 20Hz to 20kHz. THD; 0.03% at full rated power (125w) into 8Ω w/ 20-20kHz Power Bandwidth: 10Hz-50kHz @ 0.03% THD @ 8Ω Amp measures 18" wide x 13.75" deep x 6" high and weighs 17 lbs unpacked. Includes our standard 90 day limited warranty. KENWOOD KM-105 Cond. 9 $259. |
![]() NEW ADDITION 9/11/08 (Click on above thumbnails to enlarge photos) MITSUBISHI STEREO POWER AMPLIFIER M-A4370 MA4370 #...7501 for sale We have complete gone through this unit and bench checked / tested it. Amp has been cleaned inside and out. All functions have been tested and pass with flying colors! Amp designed utilizing twin oversized, vertical finned heat sink for very efficient and silent, passive cooling of output devices. This amplifier is in both great electronic and physical shape. Looks LIKE NEW and sounds fantastic! All inputs tested and both side produces clean and even sine waves! No power supply hum of any kind. It's dead silent! Following restoration procedures, we burned it in, in the shop at continuous high volume for 4 hours straight and it functioned flawlessly. On our test bench, this particular unit's (#...7501) amplifiers produced peak power of 33 volts at 8 ohms per channel for 136 watts via dual STK-4044V power amplifier packs. Great, later model power amp by Mitsubishi. Model M-A4370. HUGE power output! Excellent for 2-channel (stereo) audio listening or for use in an A/V system. Lots of punch and headroom. Features: - 2- Channel stereo operation - A, B, A+B or OFF speaker selector via high current relay - Built-in Protection circuit - LED Bar Power Status indicator - Front-mounted 1/4" stereo headphone jack - RCA input jacks - Dual, vertical finned internal heat sink - Oversize power supply transformer As stated before, we have completely cleaned and checked inside and out. Bench tested and all passed with flying colors. Amp looks like new, performs and sounds great! Amp measures 17" wide x 10" deep x 5" high and weighs 13 lbs unpacked. Includes our standard 90 day limited warranty. Mitsubishi M-A4370 Condition 9 $179. (C) C.B.S. |
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Wondering where
the "tone" you remember went?....
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TO SEE OUR ARCHIVE OF SOLD AMPS & PREAMPS CLICK HERE |
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NEW ADDITION 4/2/10 Original Specs:
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NEW ADDITION
12/18/09
Original Specs:
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![]() ![]() NEW ADDITION 2/10/10 (Click on above thumbnails to enlarge photos) TRIO-KENWOOD KM-105 / KM-106 #...0512 KM105 KM106 POWER AMPLIFIER amp Circa 1985-86 MIJ SOLD 04/09/10 We have complete gone through this unit and bench checked / tested it. Amp has been cleaned inside and out. All functions have been tested and pass with flying colors! Amp designed using Huge Power Supply Transformer and oversized, vertical finned heat sink for very efficient and silent, passive cooling of output devices. This amplifier is in both great electronic and physical shape. Looks LIKE NEW and sounds fantastic! All inputs tested and both side produces clean and even sine waves! No power supply hum of any kind. It's dead silent! Following restoration procedures, we burned it in, in the shop at continuous high volume for 4 hours straight and it functioned flawlessly. On our test bench, this unit's amplifiers produced 37.75 volts at 8 ohms per channel for 178 watts / channel and 31.75 volts at 4 ohms per channel for 252 watts / channel via Sanken 2x 2SA1215 & 2x 2SC2921 discrete output transistors. Great, later model power amp by Kenwood. Model KM-105 (same specs / design as model Kenwood KM-106. Branded for two different markets). HUGE power output! Excellent for 2-channel (stereo) audio listening or for use in an A/V system. Lots of punch and headroom. Features: - 2- Channel stereo operation - A or B speaker selector via high current relay - Dual, Vertical, 7-Segment LED Power Output Meters with Dual Position Level Selector - Built-in Protection circuit - LED Status indicators - Front-mounted 1/4" stereo headphone jack - RCA input jacks - Dual, vertical finned internal heat sink - Oversize power supply transformer - 3 Rear-mounted AC convenience outlets (2 switched and 1 un-switched for a total capacity of 200 watts) Original Specs: Design type: 2 Channels, AB operation Damping Factor @ 1kHz / 8Ω: 35 Rated RMS Output: 125 watts per channel, min. RMS, at 8 ohms, both channels driven, from 20Hz to 20kHz. THD; 0.03% at full rated power (125w) into 8Ω w/ 20-20kHz Power Bandwidth: 10Hz-50kHz @ 0.03% THD @ 8Ω Amp measures 18" wide x 13.75" deep x 6" high and weighs 17 lbs unpacked. Includes our standard 90 day limited warranty. KENWOOD KM-105 Cond. 9 SOLD 04/09/10 |
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