Pioneer SPEC-1 & SPEC-2 Preamp Amplifier Combo (not receiver) SERVICED RESTORED

Legendary, top of the line Pioneer SPEC-1 high-end stereo preamp AND SPEC-2 power amp combo. The SPEC-1 is arguably the best preamp Pioneer ever made with a ton of great features and the SPEC-2 is without doubt, the most powerful stand-alone amp they ever produced.

These are special pieces and are getting quite hard to find. Both units have been serviced and restored as detailed below, fully tested, and are sounding amazing.

Auditions will be available in Lawrence, Kansas. Pioneers top of the line, feature packed and excellent sounding preamp. 5 inputs total with a special adjustable gain Phono 2 input. Serviced and restored as detailed below. In excellent condition overall with one scratch on the front face above the tone switch (see detailed pictures), some pretty heaving scratching on the top face of the front plate (see pictures), and some light wear on the top cover.

The knobs are excellent and other than the stuff mentioned this thing is a near perfect. Here are the details of the service and restoration that was performed on the SPEC-1. Complete rebuild of the power supply boards with all new electrolytic capacitors (Nichicon Fine Gold and Nichicon PW caps) and new Fairchild transistors. Power supply voltages were calibrated to exactly 48V and -48V and all other supply voltages were verified.

The known to get noisy 2SA726 transistors were completely replaced across all boards with low-noise Fairchild equivalent devices. All capacitors and transistors were checked and anything that was out of spec or even looked suspicious was replaced with high quality Nichicon capacitors and Fairchild devices. The coupling caps for the phono stage were upgraded to super high quality Wima film capacitors. The power indicator lamp was replaced with a custom LED bulb (should never burn out) and a custom resistor value was selected to give it a warm and non-distracting brightness. All ground lugs and chassis screws were tightened. Relays were disassembled, inspected, and cleaned. All switches, potentiometers, RCA jacks, dubbing and headphone jacks cleaned with DeOxit D5 (no static and easy operation). Full detailing of faceplate and knobs. Power plug was marked with a "U" for up to denote the optimal polarity. Pioneer's most power standalone amplifier at 250W x 2 on paper. This one didn't clip until 338 watts L&R (at 0.05 distortion level) when this was tested. Tons of power that will drive any speaker. Distortion at a more typical 50/50 watts output and was measured to be 0.015% L&R. This unit has had a full service as detailed below. I went with the cool blue LED lamps but can easily swap those for warm white LEDs or traditional incandescent bulbs. Besides a few minor cosmetic issues like a tiny nick on the faceplate the only other issue is that plastic covers on the binding posts (known and common issue with these) are getting worn and frail and one is starting to slip. The simplest solution is to just use banana plugs. The binding posts still work and are in decent condition but just a heads up.

A set of banana plug adapters will be included. Here are the details of the service and restoration that was performed on the SPEC-2.

All controls cleaned and switches cleaned with DeOxit D-5. New meter lamps installed (you get a choice of cool blue LED, warm white LED, or incandescent). Checked bias and set DC offset after amp had been on for an hour. Disassembled and deep cleaned all the connector pins on the circuit boards (this made a huge sonic difference afterwards). Disassembled, inspected, and cleaned all the relays.

Fuse values were checked and fuse holders were cleaned and tightened. Calibrated the meters per Pioneer spec.

Tightened all the chassis ground connections. Tightened the speaker terminals in the back. All power supply voltages were verified. Wattage levels were checked as well as THD at multiple power levels (see above). To see my other auctions! This item is in the category "Consumer Electronics\Vintage Electronics\Vintage Audio & Video\Vintage Amplifiers & Tube Amps". The seller is "(bigchips)" and is located in this country: US. This item can be shipped to United States.

Brand: Pioneer
Type: Power Amplifier
Model: SPEC-1 & SPEC-2