• 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

distortion

  1. A

    ITT HiFi 8051 C Distortion A+B Issue

    So i bought a restored audio system that i mentioned in the title, worked fine at home for a couple months, never had issues everything works even the cassette player, so my problem is that i moved out and took the speakers with me, assembled everything in the same manner and there's heavy...
    • abxove
    • Thread
    • audio system distortion distortion in one channel german itt repair repair help vintage
    • Replies: 0
    • Forum: Speakers
  2. pup.biz

    Sansui AU-7500 Phono Woes – sounds like a wool blanket over the speakers!

    [EDIT: It is a Sansui AU-7500, not -6500 ... d'oh!] Hello everyone, I'm hitting my head against the wall here with my AU-6500. Would love some help or advice. I bought the amp a few years ago and had it given a once-over (bias, recapped out-of-spec caps, cleaned) by a friend who did a good...
  3. P

    NAD 7020 Distorting - Earthing / Grounding Question

    Hello everyone at AK and thank you all for this great resource (that I often spend many hours studying). Summary: On this unwell 7020 I am seeing 9V DC between power supply filter cap ground and chassis earth/ground. Is this normal? This chassis is earthed to the mains lead and the wiring and...
  4. F

    Hitachi HMA-7500 MKII distortion

    Hi guys! I need some help/guidance with this amplifier. I got it cheap together with it's premp HCA-7500, which is working fine. But the power amp has weird distortion when i turn the volume above the certain level, sometimes it's so violent, that even the protection is kicking in and the relays...
  5. C

    Aiwa SA-P50 Distortion on both channels

    Hello and Good Day/Afternoon/Evening to everyone so my father has this Aiwa SA-P50H that he bought a few years ago and its all original but has an issue, sound comes out distorted (mostly on one channel, the other one its almost indistinguishable but its there) going by memory so the amp...
  6. X

    Marantz 4300 startup hiss / distortion.

    Weird issue on a 4300 I got in. The second you turn it on there’s almost instant white noise. I ran a signal straight to the amps and they play perfectly. I believe the problem is in the preamp, but the thing is, the audio is clear behind the white noise I’m getting. Does this mean it could be...
  7. econeditor

    Where is the distortion coming from?

    I've been dealing with intermittent distortion coming from my setup for a while. The core of my system is a Realistic Lab-250 turntable going through an NAD 3020b. I'm currently using a pair of Klipsch Fortes, but it's happened with other speakers as well. The NAD was thoroughly restored earlier...
  8. M

    Kenwood KR-4070 receiver: output problem

    Hi all, so far I have learned a lot on this forum. I hope one of you can help me with a weird problem with a Kenwood KR-4070 receiver. I recently bought it, without knowing if it would work or not. Luckily most of the time it does and when it works it sounds really good (both on tuner and on...
  9. Refugee

    Older McIntosh Equipment - Where does the higher THD rating come from?

    I was curious what y 'all's thoughts were as to which components contribute the most to higher THD ratings on older solid state 70's McIntosh equipment vs. modern. It could be capacitors, transistors, resistors, pots and switching, or board layouts. Caps need to be changed out anyway, but does...
    • Refugee
    • Thread
    • distortion recap and restoration refurbish solid state spechs thd vintage 70's
    • Replies: 15
    • Forum: McIntosh Audio
  10. edwinh

    Denon PRA-1000 horribly distorted

    I got one of these for free from a local hifi shop that took it in in trade. No matter what I do, the output is horribly distorted. I disassembled and cleaned the volume pot, but that doesn't seem to be the problem because it's also distorted at the tape outs, no matter which input I use. Any...
  11. C

    Yamaha cr-420 intermittent distortion and bias drop. Output level triggered.

    Hello guys, I need your assistance once again. I bought a yamaha cr-420 for dirt cheap. Symptoms - distortion in left channel. I was surprised it worked flawlessly for like half an hour. Then it started to act up. Well, this was't the only problem. Right channel bias couldn't be adjusted. I...
    • Cichoslav
    • Thread
    • bias cr-420 distortion receiver yamaha
    • Replies: 14
    • Forum: Yamaha
  12. A

    Nikko QSR-4040 Distortion Questions

    Hello AK users, I'm still working through my Nikko QSR-4040 quadraphonic receiver. I have gone through it; replaced caps, bulbs, cleaned controls twice, etc. However, when I got the unit it had bad bass distortion on both front channels, the rear mimics front in 2CH. I'll do more thorough...
  13. P

    Sony STR-K1900P

    Hi, My Sony STR-K1900P receiver started having sound distortion on all the speakers, no matter what source I use - TV or radio. Here is the schema of the main board, any suggestions? Thanks
    • peshop
    • Thread
    • channel distortion k1900p sony str
    • Replies: 4
    • Forum: Solid State
  14. C

    Thorens TD166 MKII Right Channel Distortion

    Hey everyone! I've been trying to get an old Thorens TD166 MKII working again but I have persistent distortion in the right channel that I can't seem to diagnose. At this point I'm wondering if it's an issue with the cartridge, but curious if anyone has any better ideas of how to proceed before...
    • croches
    • Thread
    • distortion thorens thorens 166 mk ii thorens td166
    • Replies: 13
    • Forum: Turntables
  15. Carbsandcaps

    Tx-200 uneven voltages and strange happenings

    Working on a tx-200 that I received in no working order. I’ve got it all recapped and replaced the output transistors. Some questionable resistors and set the bias the 135mv on each set. When it’s on below half volume it sounds wonderful. When you start to turn the volume past that it’s start...
  16. Bentrong

    Realistic STA-84 Muddy Sound (Newbie)

    Hello fellow esteemed members. I just picked up a Realistic STA-84. When I hooked it up, I get this muddy distorted sound. I tried fiddling with the bass and treble and nothing helps. I opened it up and used some compress air to blow away the dust and the distortion is still present. I know...
  17. W

    Beomaster 3000-2 full distortion from right channel

    I have a full distortion from right channel. From the voltage and signal trace I did I discovered that there is no output voltage and signal from 496 diode.I changed the diode but still nothing I swapped the transistors tr45 46 47 50 from the other channel but still nothing. I swapped the...
    • wumpi
    • Thread
    • bang and olufsen beomaster distortion repair vintage amplifier
    • Replies: 0
    • Forum: Solid State
  18. kasbah512

    Marantz 2215B: WEIRD Distortion

    Above I have my scope attached to the volume pot in yellow, and the output of the toneboard in blue. This is with a low volume setting This is with a high volume setting. Ive tried disconnecting the jumpers on the toneboard output and i still get the same output as before. The unit was...
    • kasbah512
    • Thread
    • distortion marantz marantz 2215b toneboard
    • Replies: 3
    • Forum: Solid State
  19. A

    Moving from fine line to elliptical

    Hi all, This is a continuation of another conversation but with a focus on distortion and sibilance with regard to two cartridges… Ortofon 2M Bronze (my present cartridge) and Nagaoka MP-200 (a cartridge that is making its way across the globe to its new home). My set up is: Thorens TD125 SME...
    • A Montreal
    • Thread
    • distortion nagaoka mp-200 ortofon 2m bronze sibilance
    • Replies: 45
    • Forum: Turntables
  20. runningdog

    Marantz 2325 has high THD in both channels

    This 2325 had symptoms that included high Total Harmonic Distortion, made even worse with an 8 ohm load. While I was looking into this the receiver behaved inconsistently. This was after a rebuild. I set it aside in hopes that with a long rest it would fix itself. LOL. After digging in again...
  21. J

    Some records "don't work" on New Rega P3 Exact

    Hi all, Since a few weeks I have a new Rega P3 with an Exact cartridge (combined with a rega fono mini a2d pre-amp, a Sony TA F555ES amp, and KEF Q350 speakers). I'm generally extremely satisfied with its musical performance. However, I am experiencing some rather puzzling issues with a few of...
    • joostdemoor
    • Thread
    • distortion rega exact rega p3 tracking problem
    • Replies: 33
    • Forum: Turntables
  22. tusntuk2

    SX-626 Problem - Has this happened to you? (I hope to focus repair)

    Greetings, AK'ers. Thank you for tuning in here. I was listening to a digital conversion from my TV in AUX, signal had lots of heavy bass rumbling in the scene, and the 626 went "pop" and there was distortion on the left output. This unit has been recapped, it has been working well for two...
    • tusntuk2
    • Thread
    • distortion heavy bass output problem pioneer pop recapped sx-626
    • Replies: 32
    • Forum: Pioneer Audio
  23. M

    Severe Sound Distortion from MC225

    Hi, a total newbie here. I hope you are all well. I have a MC225 which I bought about 25+ years ago. I hadn't used it much in the past. Like many people, I started listening more during the pandemic. Everything was fine until a year ago. One day, all of sudden, the sound got very...
    • Mil Gnoh
    • Thread
    • distortion distortion in both channels mc225 sound tube amp
    • Replies: 28
    • Forum: McIntosh Audio
  24. Moonwatcher

    2230 FM exhibits annoying raspiness

    Hi, all. I found a 2230 in a nearby town for an incredible price, and it's almost perfect except for two dial lights. I'm truly astonished by the fullness of the sound into KLH Sixes, which I thought only possible with tubes. I even began thinking about selling my beloved little Magnavox...
  25. runningdog

    2325 has high distortion unless Hi Filter is on

    A newly rebuilt 2325 shows high distortion in both channels. THD is 0.200% if the Hi Filter is off. When turned on (pressed in) THD drops to a typical 0.004%. No other switch or control affects it. The distortion starts at about 1V output from the receiver, and then remains constant all the way...
Back
Top Bottom