• The move to the new server is done. There are some software and database maintenance updates in process. This has us passing the hat around to help out. We appreciate any donations. Seriously, even a dollar helps. The payment page may be found here - https://www.audiokarma.org/support.html

spec 4

  1. david winter

    SPEC 4 variants (AWM-146-0 / AWH 066-B)

    Hi, I recently scored a nice Pioneer bundle: SPEC3 + SPEC4 along with a PL1000 and CT-F1250. I started going through the SPEC4 and noticed some differences in the board revisions, which brings a first question: is there a place where all revisions can be found to compare ? I downloaded two...
  2. slayer44

    Spec 4 Surprise Overhaul and restoration

    Hi all. I recently acquired a spec 4 from the auction site that needs new outputs...I know what I need to buy...my question is, how do I go about ordering these with matching hFe?...the manual states they should be matching. Can you order them this way?...any help is appreciated.
  3. Ray122

    Testing Protection Mode

    So this might be a bit of an odd question seeing as there doesn't seem to be too many posts about it. Naturally lot of post have been about getting amplifiers out of protection mode, but what if I wanted to get my amplifier in to protection mode. Crazy right? This question primarily centers...
    • Ray122
    • Thread
    • amplifers diy pioneer pioneer spec 4 protection protection board protection circuit protection circuit issues spec 4
    • Replies: 5
    • Forum: DIY
  4. A

    Pioneer Spec 4 restoration.

    Hi. Im finishing the restoration o two Spec 4 amps. Im having problem finding a good sustitute of the speaker protection relay. Any sugestions? Thanks in advance.
  5. Z

    Recieved a Spec stack as a gift...should it be serviced?

    Hey Pioneer fans, For a long time I had a great SA-8100 until it blew a channel when I was moving across the country and didn't want to bring it...but now I am the lucky recipient of a full spec stack from my wife's uncle. 10 years ago I joked that he should call me if he ever wanted to get rid...
    • zulks
    • Thread
    • ads 910 ctf-1000 pioneer rt-707 spec 1 spec 4 tx-9500 ii
    • Replies: 19
    • Forum: Pioneer Audio
  6. S

    Spec 4 Restoration Questions

    Ok so I picked up a pretty rough shape Spec 4 and am planning on doing a restoration on it. So far I have taken apart and cleaned everything and have done searches and Found the BOM list from this site. so I am compiling my list if stuff that my unit will need to that list and getting my order...
  7. HowardW

    Subwoofer and Vintage Pioneer equipment

    First off let me say that much of this stuff gets me confused so I may be asking things that may not make any sense. I have a Pioneer Spec 1 preamp ne. head unit and two Spec 4 amps, a pair of DBX Soundfield V speakers and a pair of Pioneer tower speakers. My first thought was to split the...
    • HowardW
    • Thread
    • 7.1 av spec 1 spec 4 subwoofer surround
    • Replies: 2
    • Forum: Speakers
Back
Top Bottom