• 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

amplifier

  1. thought91

    How to update a vintage amp?

    Vague question, I know. Are there any threads out there indicating how to determine what to replace, what to replace it with, and how to replace it? I'm completely new to circuitry stuff, so approach as if I know nothing, which is pretty accurate. I'm trying to update a Nikko Alpha 1 and Beta 1...
    • thought91
    • Thread
    • alpha amp amplifier beta how to nikko power update upgrade vintage
    • Replies: 16
    • Forum: DIY
  2. JMiP

    JVC JA-S77 - Noise Issues

    I have a JVC JA-S77 integrated amp that sounds wonderful except for a few issues. When I have no music playing, I turn up the volume to see if there is any static or noise of any kind coming from any of the input channels. Dead silent on the Tuner and AUX channels, but Phono 1 is noisy and Phono...
    • JMiP
    • Thread
    • amplifier jvc jvc ja-s77 noisy
    • Replies: 8
    • Forum: Solid State
  3. moediggz

    Mc225 chasis lettering help!

    Hey guys. I got a gorgeous mc225. All original working but the lettering is toast. I can't find a source for a nice chasis to swap. Do any of you out there have vector files of the lettering or know someone who can help or have any good advice for me?
  4. Tubeglowpio

    Anyone uses tube guards?

    Have thought about using tube guards in a build but always wondered how you would switched the tubes out? Would you have to flip the amp and remove the nut then pull the guard off, swap tubes and put guard back on? Or is there enough room to get a grip on the tube and wiggle it out of the socket?
    • Tubeglowpio
    • Thread
    • amplifier build diy stereo tube tube amp tube guard vacuum tube
    • Replies: 11
    • Forum: Tube Audio
  5. MBuras

    US made Marantz use of silver mica caps

    The subject comes from my recent acquisition of a Marantz 1120 which has build quality unlike the 22xx receivers and amps of the mid to late 70's. Despite restoring many dozens of the aforementioned units this will be my first experience with the US made units which feature large use of axial...
  6. Chaostoday

    Help with 2 channel amplifier buy

    hi. Looking to add a 2 channel amp to a secondary system I have in my bonus room. Currently running an Onkyo A-9050 and it drives Revel F12’s. I also run a modded Technics SL1200 MK2 with phono preamp Looking for a nice discrete 2 channel maybe class A/B. Budget around $700. Would like to...
  7. Chaostoday

    Help with 2 channel buy

    hi. Looking to add a 2 channel amp to a secondary system I have in my bonus room. Currently running an Onkyo A-9050 and it drives Revel F12’s. I also run a modded Technics SL1200 MK2 with phono preamp Looking for a nice discrete 2 channel maybe class A/B. Budget around $700. Would like to...
  8. cnolanh

    MC2150 cosmetic quirks and questions

    Last year I bought an MC2150 from AudioClassics and it's a terrific amp. This particular one is in good condition but arrived with two small weirdnesses, which I was reminded of recently when I moved the amp: 1. On the rear chassis, the white serial number area is blank. I highly doubt that...
    • cnolanh
    • Thread
    • amp amplifier cosmetic lights mc2150 mcintosh normal serial number
    • Replies: 26
    • Forum: McIntosh Audio
  9. R

    recommendations for source for integrated amplifier

    I picked up a very clean Onkyo A-8048V (Sanyo 4044V amp modules) at a thrift store. I found that it is stuck in protect mode. I checked voltages at the amp pin connects to the board and find voltages way off on one of them. I am betting that the amp module has internal damage, and that that is...
  10. K

    Dynaco 6v6 Ultra Linear Tube Amplifier PCB Questions

    Hello, Another post seeking help wiring a nondescript Dynaco tube board from Ebay. This one is a Dynaco 6v6 ultra linear circuit. I have the power supply issue under control, but I'm looking for advice on how to properly wire the output transformers to the board. I've read that the OPT for...
    • KCharlemagne
    • Thread
    • 6v6 amplifier board diy dynaco tube ultralinear
    • Replies: 4
    • Forum: DIY
  11. J

    Fiio Q1 or Q1 Mark II?

    so CNY just came around and now i have a bydgt to get my very first portable dac/amp. i have been reading up on some reviews and many people have told me that the fiio q1 mark 2 is a good dac,but i live in SE asia so the Q1 mark 2 cost 150USD(aprox) while the Q1 cost 100USD(aprox) and many...
    • jeremysux12
    • Thread
    • amp amplifier dac portable
    • Replies: 0
    • Forum: DACs
  12. J

    a cd player/amplifier combo?

    so,im relatively new to here so go easy on me. so im about to move for uni and im planing to bring my stereo setup.i have a sansui sr222 mk1 which is chucky enough and i already have a pretty chunky amplifier and cd player which i def am not ready to carry on the plane.so im thinking of just...
  13. A

    Best phono stage on vintage amplifiers

    Hi ak's am a new user and i have one big question: I want to buy a vintage amplifier or a reciever for my thorens 166 mk2, currently with a shure 91 cartridge soon to be change for a Nagaoka m110 The record player is nowdays running through an Akai am 2200, the sound is ok, but i will like...
    • Arval
    • Thread
    • amplifier marantz reciever sansui au thorens 166 mk2
    • Replies: 58
    • Forum: Solid State
  14. P

    Good amp for Klipsch R28f?

    i've replaced too many crossovers. need to know of a good stereo amp for the Klipsch R28f. my subwoofer is ampplified by a crown drivecore separately so. also. bonus points if the stereo amplifier has rca inputs and a subwoofer signal output.
  15. vaathi

    Scott 399c with wood case in vintage condition

    My Scott 399c looks ugly as hell in nude. I have seen them transform in a elegant beauty when paired with original wood case. So I am always on the look out for original wood cabinet for my 399 for a while now. As part of my auction site ritual, I was checking for wood case for my 399c and I saw...
    • vaathi
    • Thread
    • amplifier scott scott 399c tube vintage wood cabinet
    • Replies: 13
    • Forum: Tube Audio
  16. Cody AOC

    How Do I fix my Ground Loop Problem?

    Hi so I bought two Art EQ355's and they both give me a 60hz hum with my subwoofer and I have connected the eq on different circuits and it still does it I even disconnected all audio inputs to the eq and had the sub connected to the output of the eq and still get a hum I have heard about ground...
    • Cody AOC
    • Thread
    • 60hz 60hz hum amp amplifier audio equalizer ground loop ground loop isolator hum sound
    • Replies: 7
    • Forum: General Audio Discussion
  17. PhantomFlame

    HUGE Spark When Charging Phone Touched Amplifier wtf?

    So I was charging my phone and it was on the desk, I nudged it a tiny bit by accident and it touched the front facia of my amplifier (metal) and there was about a 1 inch spark coming from the speaker of the phone?!?! :rflmao: Now when i watch videos on the phone there is a slight bleep/static...
  18. AlexM1402

    Onix OA20 in need of repairs

    Hi guys, I've had this great Onix OA20 amp for about 10 years, given to me by a good friend who's had it since 1984. It worked well until this year when the left channel stopped working and the input selection know starting to be a bit temperamental but still in working condition. I've spoken...
    • AlexM1402
    • Thread
    • amplifier onix amplifier onix oa20 vintage amp
    • Replies: 0
    • Forum: Solid State
  19. PhantomFlame

    Weird interference when vintage receiver is plugged into line out of pc...

    I've been having this issue with my audio setup for a really long time and its time to finally fix it. When the line-out from my pc is plugged into the AUX on the back of my Pioneer SX-590 (3.5 to rca) there is a constant static sound in the background and also a bleeping sound every time half...
  20. Soun!

    Just got a pair of SP-4500A’s and of coarse need info!

    Any info (manuals, brochures, etc.) would be very much appreciated: I failed to find anything online, unfortunately. Could somebody please tell me what the sensitivity of the 4500’s is? I know they are 8 Ohm nominal, 120W RMS, but that is about all I know. If I am not mistaken, this model was...
  21. P

    Sansui Au101 vs Au999

    Hey guys, I’m currently a proud owner of a Sansui Au101. I have been using it for quite a while now and I’m thinking of upgrading to the Sansui Au999. How do the sound signature of both amps differ and is it worth it? Currently using a pair of Klipsch RB61 speakers
  22. lattiboy

    Nikko POWAH! Alpha 1, Beta 1, Gamma 1

    Was worth the 45 minute drive for sure, don’t think I’ve ever seen all of these together before. Everything appears to work perfectly and is in pretty amazing condition. Gong to polish up he faces a bit this week:
    • lattiboy
    • Thread
    • amplifier gamma 1 monster nikko nikko alpha 1
    • Replies: 4
    • Forum: Solid State
  23. J

    Repair of the Epiphone EA28-RVT Guitar Tube Amplifier.

    This was a difficult project, unfortunately it was heavily modified so repairs did not align to the schematic, things had to be done carefully because the extent of the modification was done so that different tubes would be used for different purposes, a repair nightmare. Video 1 of 3 Video...
    • JRUBIN
    • Thread
    • amplifier ea-28-rvt ea-28rvt ea28-rvt ea28rvt epiphone guitar
    • Replies: 0
    • Forum: Tube Audio
  24. J

    Marshall 6100 LM Output tube meltdown troubleshooting event

    My almost unedited troubleshooting event of this 30 year anniversary amp that was eating final tubes for breakfast, before I get yelled at be sure to review the constraints of this project, so YES, i would have done it different, given the choice Enjoy,
    • JRUBIN
    • Thread
    • 6100 6100lm amplifier bias capacitor marshall
    • Replies: 0
    • Forum: Tube Audio
  25. 82smithtown

    EV S15-3's, Parasound 2100, and Crown XLS1502......thoughts?

    Happy Holidays all! These EV's were my late fathers and I've tried at least six receivers of varying age/wattage/brand as well as a Yamaha integrated, and nothing seems to get those 15's making the noise their size suggests they should. I had the x-overs rebuilt with all totl caps and such...
Back
Top Bottom