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sx

  1. jpreza

    Pioneer SX-550 No POWER where do I start?

    Recently picked up a Pioneer SX-550, really nice looking unit. There is no indication of power at all when I switch the power button to Speaker A/B or A+B. Nothing lights up. In reading the forums, these units are known for the AF muting switch issue and the power/speaker switch. That...
  2. FireGuruMN

    Side Panel Screws for Pioneer SX receivers

    I recently purchased a SX-580 from shopgoodwill.com at an [almost] reasonable price. I've made other bad decisions in my life also. But this not the place for that discussion. It came with 6/32 screws holding on the side panels. Or better said NOT holding on the side panels. After...
  3. Biscayne

    Pioneer SX-780 Repair help

    Hi everybody, I am in the process of restoring a Pioneer SX-780 and would need some guidance from the gurus to get it to the finish line. The unit powers on and never blew fuses but had 1, possibly both STK's blown and protection relay would not click. This made sense as the voltages at the STK...
  4. Moth R. Superior

    I broke my sx1050.. maybe

    Hello, so I had an accident today and my sx1050 fell off a table. Now the right channel does not work.. What can be done?
  5. rkeller

    Speaker Pairing, modern speakers for vintage Pioneer SX series

    Working on restoring an SX 737 and wondered what your favorite or recommended pairing might be. Just as a start I restored an SX 636 for my daughter who has a small house and found a pair of Pioneer SP-BS22 for around $110.00 on sale that sounded amazing for such small speakers...
    • rkeller
    • Thread
    • favorite pairing pioneer series speakers sx
    • Replies: 1
    • Forum: Pioneer Audio
  6. Gotaj

    SX-650 woes (left channel distortion when connecting speakers)

    Hello everyone. I've been reading these forums for a while, ever since I picked up a dirty SX-650 for 35 euro (~40 USD) a couple of months ago. I've no experience working on amps but was hoping to get into the hobby since I love the look and sound of vintage audio gear, so I took my chances. The...
    • Gotaj
    • Thread
    • 650 channel distortion left pioneer sx sx-650 sx650
    • Replies: 6
    • Forum: Pioneer Audio
  7. bluenote79

    Pioneer sx-1000TW VS Pioneer sx-6000 ?

    What would the main differences in sound be between these two receivers? I currently own an Sx-6000. I really like the warm sound I get from it, combined with my Fisher XP7 speakers. There is an Sx-1000TW for sale that the owner says sounds almost like a tube amp. It's been recently...
  8. 70'sMusic

    Cleaning SX-1250 RCA Connector Question

    Hi Everyone, Been loving my newly acquired SX-1250 and want to clean the RCA connectors. There is something on the outside of the RCA connectors. I used very fine steel wool along with DeoxIT to clean the metal "jumpers" to get what looked like rust off of them. Don't know if it's dust that...
    • 70'sMusic
    • Thread
    • 1250 1970s pioneer receiver sx sx-1250 vintage vintage pioneer vintage pioneer receiver vintage pioneer stereo
    • Replies: 15
    • Forum: Pioneer Audio
  9. D

    Pionner SX 424 buzzes like crazy.

    So a couple of months ago I got my first proper vintage audio equipment, a Pioneer SX 424, it was a little rough around the edges but it worked flawlessly for the most part, until this morning.When I turned it on I was greeted with a loud buzz from the speakers, I turned it off immediately and...
  10. foo.kamikaze

    Pioneer SX-1250: How to connect Klipsch R‑12SW Subwoofer?

    Hello fellow "Audiokarma-ites"! I'm a fairly new member of Audiokarma, and audiophile novice. I live in Forest Lake, Minnesota, and own various Marantz 22XX series stereos and various Pioneer SX series stereos. My current favorite is my SX-1250. I switch between two sets of speakers in my two...
  11. A

    Pioneer SX-780 Channel Imbalance

    Just realized today after fiddling around that my unit's right channel sounds as if the loudness function is permanently on. This was confirmed by the fact that the meters run evenly when loudness is actually on, whereas the right channel is visibly and audibly louder otherwise. I cleaned the...
  12. A

    Marantz 2215b or Pioneer SX-780?

    My dilemma is that I've currently got the Marantz whereas a SX-780 can be made available to me for $140, but I've only got use for one receiver at the moment (wife, practicality, etc.) In everyone else's experience, which one should I end up with? It'll be hard for me to let go of that...
  13. cbusuttil

    Pioneer SX-1280 Restoration in Malta

    Hello all! recently acquired this marvelous SX-1280 - been looking for one for a while. I also have an SX-980 which i recapped myself back in 2011. Here are some pictures that I managed to take while restoring this big old dog. re soldered all of the solder joints, full recap and replacement of...
    • cbusuttil
    • Thread
    • 1280 pioneer pioneer 1280 pioneer sx pioneer sx 1280 pioneer sx-1280 sx
    • Replies: 44
    • Forum: Pioneer Audio
  14. dlucy

    Silver-face era Pioneer SX-x2x and SX-x3x receivers with gold or bronze face

    I've seen several comments about "gold" or "bronze" colored Pioneer SX receivers from the "silver-face" era. I've collected quite a few SX-424, SX-525, SX-626, SX-727 and SX-636 units over the last six months (refurbishing them to compare to my HK 330B's and pick the one I like best, then sell...
    • dlucy
    • Thread
    • gold tone pioneer pioneer sx silver-face sx sx-424 sx-525 sx-626 sx-636 sx-727
    • Replies: 22
    • Forum: Pioneer Audio
  15. sanjib

    Pioneer SX-2500

    Recently I have acquired a Pioneer SX-2500 in nice condition. I paired it with Pradigm 9SE MKII speakers. Wow!! I am really surprised about the sound quality of this receiver! It has very strong tuner section along with auto tuning feature. This is my first Pioneer, I am comparing this with my...
  16. Joe Stem

    Another Pionner sx 1250 repair

    Hey I'm Joe, I live in Sw Florida and I've noticed from looking around and searching the forum that it does not appear that there are any shops to work on these Vintage receivers. This week my dad gave me his 1976 Pioneer SX1250... :cool::cool::cool: It has not been used in at least 20 years...
    • Joe Stem
    • Thread
    • 1250 monter amp pioneer recieiver repai restoration sx sx1250
    • Replies: 70
    • Forum: Pioneer Audio
  17. F

    Pioneer SX 525 and SX 939

    Hello, first time posting here. I have both a Pioneer SX 525 and SX 939 that are experiencing the same symptoms: After a few minutes of use, they develop a loud static/crackle/thunder from the right speaker. From what I've read this may be shorted/bad transistors on the power amp board, as...
  18. G

    Pioneer sx-525 self inflicted problem

    I have an sx-525 that i was fixing the power switch on for a friend. That went well so I decided to re cap the power supply board since I had the caps and some time, that didn't go so well I put one of the 220uF caps in backwards, I know shoot me! Anyway the amp works fine on Aux and measures...
  19. Franco989

    Pioneer sx xx50 Parts (switch cap)

    Hi fellow AKer's I was wondering if anyone out there has source for getting pioneer sx parts, what I'm mainly looking for is a switch cap for an sx-750. From my understanding the whole 50 series use the same cap. Already tried eBay but nothing is coming up. If any of you out there has one that...
  20. dlucy

    Can a bias adjust be added to SX-580 at the 2SA798 pair?

    I've read more than a few threads here about SX-580's (and SX-680's, too, I think) where someone asks "where is the bias adjust" and several chime in "there is none, that's what you get in a BOTL". Looking at the schematic, isn't it possible to add a bias adjustment to the two dual-transistor...
    • dlucy
    • Thread
    • pioneer pioneer sx-580 sx sx-580
    • Replies: 13
    • Forum: Pioneer Audio
  21. dlucy

    Recap, restore, restomod a SX-580

    I've started prep work for returning a SX-580 to another 30 years of service. I've got some snippets from other threads to use as the basis for the BOM, but I'll update those here with what I find in this unit and what others have mentioned or corrected along the way.
    • dlucy
    • Thread
    • pioneer pioneer sx-580 recap restoration sx sx-580
    • Replies: 3
    • Forum: Pioneer Audio
  22. dlucy

    Recapping, Rebuilding, Restoring, Rest-o-modding... a Pioneer SX-450 receiver

    Well, AK'ers, I owe many of you a big round of thanks. I've finished my first complete restoration, it was a SX-450, and most of what I did was a result of you all asking each other questions, answering them, and leaving pointers to more info. You guys rock! Thank you! It sounds terrific (with...
    • dlucy
    • Thread
    • idle current pioneer recap recapping restore silver face snubber sx sx-450 trimmer
    • Replies: 53
    • Forum: Pioneer Audio
  23. dlucy

    Painting over the vinyl veneer on Pioneer SX-450 receiver

    How to best paint over the vinyl veneer on the metal top cover of a silver face Pioneer receiver? What's the best way(s) to do it? I'm finally done with the restomod on my little SX-450 and about to send it on to the new owner. I've made two solid hardwood sides to replace the dying particle...
  24. Bigreddog

    Vintage or modern receiver with HPM 100 speakers

    Struggling with making a decision over a modern receiver like the Onkyo with Bluetooth and Internet radio or go back with a Pioneer SX 780 like the one I originally purchased with the HPM 100 speakers I currently have. Any advice or opinions are appreciated.
  25. aerospac3

    SX-750 Intermittent Relay Shut Off

    Hi fellas, Been trying to search the forums for answers, but I'm stuck and forced to make a new thread. Regardless of channel, load, or speaker setting(A vs. B vs. A&B), my SX-750 relay keeps shutting off and turning back on again at random intervals. While the relay is engaged, the amp sounds...
    • aerospac3
    • Thread
    • pioneer repair sx sx series sx-750 troubleshoot
    • Replies: 14
    • Forum: Pioneer Audio
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