Just Picked up both the Spec-1 & the Spec-4. Spec 1 was immaculately clean inside. All Controls work with no looseness. Single issue is volume control indent, #20 goes completely silent on right channel. But every other indent on both channels work. and since it is paired with the Spec-4, which has it’s own volume controls, the loss of one indent is not a deal breaker. Inside was dusty since it is open screen top & bottom. Blew it out, and everything else inside looked flawless. The Clarity and Punch of this pre-amp along with the Spec-4 amp is never ending Clean power !! The dual tone features in both Bass & Treble are limitless. This pre-amp has so many more features than most other pre-amps. It is Such an Impressive and Distinguished Stereo set. Going to Have fun Playing and will love this set for years to come !!Hello everyone, and thanks for all your generous contributions to this site. I own a Pioneer Spec-4 amp Type S, which is apparently the “General Export” model. Would anyone have available pages 41-48 of the Service manual. These pages cover the differences between the 2 models (USA and General export) which, at a glance, appear to be several.
This website is not affiliated with or sponsored by Pioneer. To purchase Spec-4 spares or accessories, please contact the company via their website or visit an authorised retailer.When complete this amp really rocks. Bass response is tight and precise. It was broken in on several pairs of speakers and none of them caused the amp to break a sweat. Amplifier alignment as always was adjusted after the work performed and then checked before the unit is packed to go home. This was a treat to have in the shop and was compared to a few other amps we have for demo that are in the same league and were in competition almost 40 years ago. That’s a review for another day but the SPEC 4 was really impressive in it’s ability to play almost all genres of music without deficiency. Here’s a few shots.
It was a pleasure to do some restoration work on such a nice top of the line Pioneer power amp. This SPEC 4 amp was sent to HV HiFi from Virginia and on early visual inspection we found venting filter capacitors. This has been becoming the norm for many of these big amps from the 70’s and 80’s. Due to the leakage we did not want to push the amp to its limits for fear of catastrophic failure. We instead disassembled the amp and restored the meter board along with the amp boards, before installing four new Chemi-con 0.22F filter caps which fit into the existing clamps. Our usual mix of Panasonic and Elna caps were used. Elna Silmic II were used for electrolytics in the signal path.Late 70’s Silver aluminum face large format power amplifier made in Japan. 180 watts per channel at 4 ohms (150 watts per channel at 8 ohms). The results: a continuous power output of 150 watts* per channel, min. RMS, at 8ohms from 20 to 20,000Hz with no more than 0.01 % total harmonic distortion. Check out the details. Get the best deals on pioneer spec when you shop the largest online selection at eBay.com. Vintage PIONEER SPEC 4 STEREO AMP – Powers On untested. Modell: SPEC-4. Typ: Stereo Endstufe. Baujahre: 1976 – 1980. Hergestellt in: Japan. Farbe: Silber / Schwarz. Leistungsaufnahme: max. 760 W. Abmessungen: 480 x 186,5 x 445 mm. Gewicht: 24,5 kg. Neupreis ca.:. Mar 25, 2016. #1. I am looking for SPEC-2 or SPEC-4 on Craigslist (in whole USA area) and I see nothing. The same on eBay. NONE, for at least a couple of weeks. In this video we talk about the history of the Pioneer Spec 1 & Pioneer Spec 4. We discuss functionality, browse catalogs, and open them up. 180 watts per channel at 4 ohms (150 watts per channel at 8 ohms). Huge dual lighted power meters. Super low distortion (0.01%) and fantastic damping factor of. Pioneer SPEC-4 ; Power Output: Continuous power output of 150 watts per channel min, at 8 Ω from 20 Hz to 20,000 Hz with no more than 0.01% total harmonic. That’s a review for another day but the SPEC 4 was really impressive in it’s ability to play almost all genres of music without deficiency. Here’s a few shots. Fully Tested and Cleaned. Description. The Spec-4 employs DC construction which excludes capacitors from the NFB circuits and uses a dual transistor differential amplifier. View and Download Pioneer SPEC-4 service manual online. Stereo Power Amp. SPEC-4 amplifier pdf manual download. Used Pioneer Spec 4 Control amplifiers for sale on 400+ second hand hifi sites & shops. Use Hifi Shark to monitor pricing and global availability Pioneer Spec-4 Specifications Power output: 150 watts per channel into 8Ω (stereo) Frequency response: 5Hz to 100kHz Total harmonic distortion: 0.01% Damping factor: 100 Input sensitivity: 1V. Entdecken Sie Pioneer Spec-4 Verstärker in der großen Auswahl bei eBay. Kostenlose Lieferung für viele Artikel! Specifications Power output: 150 watts per channel into 8Ω (stereo) Frequency response: 5Hz to 100kHz Total harmonic distortion:. Description. The Spec-4 employs DC construction which excludes capacitors from the NFB circuits and uses a dual transistor differential amplifier with a current. Used Pioneer Spec 4 Control amplifiers for sale on 400+ second hand hifi sites & shops. Use Hifi Shark to monitor pricing and global availability.