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amplifier

  1. Jxmos

    Motorola HS-696c amp / HS-709d preamp - separation question

    Tube experts, I'm working on a Motorola SK14 console amp/preamp pair and have a question about making the amp a standalone. The amp is a HS-696c that provides plate and heater voltage to 2 12AX7s on the preamp. The preamp also has a bulb wired in with the heaters. If these are separated, do...
    • Jxmos
    • Thread
    • amplifier hs-696c hs-709 motorola standalone
    • Replies: 2
    • Forum: Tube Audio
  2. T

    Sony TA-1140 dead channel

    A while ago I started to have problems with the left channel of my Sony 1140 amplifier. The sound would disappear completely or with some white noise present. I could make it work by turning the volume up but that stopped working a while ago. Turning the power on and off would turn the channel...
  3. T

    Sony Str-6045

    I have an opportunity to get a Sony Str-6045 for 300 Canadian. Its not easy to find accurate specs but I think I did and it has pretty poor SNR on MM phono (important) 60db, and the other two aren't great either. Is it worth it? Would I be happy with the sound? I am learning so I could be...
  4. M

    Choosing a receiver

    I really truly love the look of the mid to late 80's sony receivers I just love their design I also want them to match with my PS-FL7II I picked up for cheap at an estate sale in good condition but I'm stumped on what receiver would be best for my case I have a set of Sony SSCS5 bookshelf...
  5. J

    Most Basic Surround Sound Setup Help

    Looking for some help setting up some speakers. It's just gonna be for our shop and the speakers are from the garbage. Only thing I want is bluetooth. Is all I have to do is get a bluetooth amplifier and hook the speakers up to it? Do I need to make sure I have a certain amplifier for the...
  6. PhotoXplorer

    MicroSonic MS-3 with Schiit Rekkr amp

    Hey everyone, I've had a pair of MicroSonic MS-3 Series-II teeny tiny speakers for my desktop setup that I have really enjoyed. I have them paired with a sub and they sound pretty good. I'm trying to keep my system as small as possible, yet get some good quality sound. My current setup is...
    • PhotoXplorer
    • Thread
    • amplifier microsonic ms-3 ms3 rekkr schiit schiit audio sensitivity
    • Replies: 8
    • Forum: Speakers
  7. Connor G

    Sony TA-N7B VFET Amplifier Restoration

    Preface: Hey everyone! It's been a while since I've posted here or on YouTube, so I wanted to share an update about a project I started back in June. Life has been pretty hectic with work and everything else, leaving me little time for any repair or restoration projects. However, I did carve...
    • Connor G
    • Thread
    • amplifier restoration sony ta-n7b vfet
    • Replies: 19
    • Forum: Solid State
  8. michaelm101

    Which Vintage Integrated Amps Have A + B = PARALLEL CONNECTION?

    I have a pair of 1980s GNP speakers that require the satellites to be connected to "A", and the (passive) woofer box (2 separate L & R woofers) to be connected to "B." I've discovered here on AK, that my old Kennys are A+B = SERIES, so I currently have an old Kenny running the satellites, and...
  9. Q

    Sony TA-1150

    Hi, new member here, I just picked up a SONY TA-1150, the amplifier looks and sounds amazing, I had to part with my audio lab 8000a, but no regrets. The Sony was advertised as fully working but it has some issues that I thought that you could help me with. 1. There is a loud thump when powering...
    • quotidien
    • Thread
    • #70s amplifier sony sony ta-1150 vintage 70's
    • Replies: 4
    • Forum: Solid State
  10. Bobby DIG8L

    help with Carver M1.0t - powers on but no sound

    I'm a bit of a newb but I'm into tinkering with electronics so I'm trying to figure this out. I got this amp used, it powers on but there is no sound output. I ordered a capacitor kit and installed the twenty-something caps that were in there, obviously no big power caps included but those...
    • Bobby DIG8L
    • Thread
    • amplifier carver m1.0t no sound not working
    • Replies: 4
    • Forum: DIY
  11. M

    Beloved MCS 3865 Amp Right channel started popping. Thoughts?

    I have been using a Modular Component Systems 3865 in my workshop. It has plenty of power to drive my Technics SB-G800 (97 db/watt) speakers. Have used it for 2 years until the right channel just started popping loudly every minute or less. Needle jumps (yes, one needle still works on the watt...
    • MarkHaslett
    • Thread
    • amplifier audio amplifier repair mcs mcs 3865 modular component system amplifier troubleshooting amplifier
    • Replies: 10
    • Forum: General Audio Discussion
  12. H

    (RCA VPT70E) Radio and Amp not powering on - my first restoration of a solid state radio, looking for help.

    Hi! I recently picked up a RCA VPT70E (circa 1970) from FB marketplace and was looking for some guidance on where to start with restoring a solid state radio. From my understanding they didn't make many of them, so it's hard to find documentation for them. It's a stereo console with a turntable...
    • hennery
    • Thread
    • amplifier capacitors rca restoration help solid state
    • Replies: 2
    • Forum: Solid State
  13. C

    Amp Wattage and it's Relation to Speaker Impedance

    I'm sorry for asking a question that I know has been asked a couple times here before, but I just really want to make sure I'm understanding this correctly. I just picked up a Realistic STA-2100D that sounds absolutely terrible with a couple sets of speakers I have around that are lower...
  14. jFF_Bulbo

    Sansui au 717 transformer help

    hello. working in a au 717 wich need tons on TLC. short on DBT . i rebuid amp modules, short on DBT i removed power supply and disconected the amp boards. short on DBT. transformers, maybe blown? it is a multivoltage unit, once removed from amplifier, how could i conect or configure them to...
  15. S

    streamer and amp recommendations under $2000 combined

    Hello, I am new to buying audio equipment >$500/component. I’m overwhelmed by the choices online that one cannot listen to without ordering and possibily returning, but the limited choices within a total budget of $4000 at a local audiophile shop, where listening or borrowing for home trial is...
  16. G

    Denon AVC-A10se, Anyone familiar with this amp and some of its faults???

    Hello, I am new to this forum, which I have just found after some searching. I have a BASIC Electronics knowledge. I have built many electronics kits back in the 80s and more recently guitar pedals. My big down fall is troubleshooting when there is a problem. Besides that, I have a beautiful...
    • gt311
    • Thread
    • amplifier avc-10se denon input lose sound lose
    • Replies: 2
    • Forum: Solid State
  17. Jeepnmon

    Sony TA-N77ES Power Amplifier - Help with VU Meter

    I have a Sony TA-N77ES power amplifier purchased from the original owner a couple of years ago. I used it a few times and it worked and sounded great. A few months afterwards, one of the power/VU meter needles stopped moving. Long story short, I had a tech look at it and he subsequently sent it...
    • Jeepnmon
    • Thread
    • amplifier power meter sony sony ta-n77es vu meter
    • Replies: 4
    • Forum: Solid State
  18. RichardPi

    Introduction. Richard from the Netherlands

    Good day to you all! I want to introduce myself after visiting the AudioKarma forum for information and reviews over the last years. I am Richard, born in the '80s and live near Amsterdam, the Netherlands. Particular areas of interest related to 'Audio'; Speakers & amplifiers. Over the last...
  19. Flamedemon

    Yamaha CR620 Output Transistors Replacement

    I picked up 2 Yamaha CR620 amplifiers a while ago, one worked and the other one the relay did not click. As an inexperienced noob, I accidentally swapped a transistor between the two amps after testing that one of the transistors were faulty. I ended up breaking 2 of the transistor because I...
  20. KingWzrd

    Hafler DH500 Channel Out Help Needed

    Hello everyone, I have a DH-500 that recently had the right channel stop putting out sound. I've read a few posts about ensuring the relay clicks when the amp it switched on (it does) and all fuses inside and the back are not blown. The light is normal on the front of the unit and the fan is...
    • KingWzrd
    • Thread
    • adcom amplifier diagnosing diagnostics gfa-555 hafler
    • Replies: 5
    • Forum: Solid State
  21. T

    My PMA 500 AE probably needs to be replaced

    My Denon PMA 500 AE has had the input selector clicking for years but I have been patient. Now sometimes the sound quality is bad even with a different AUX cable or source. It starts breaking or as if the quality is less than 128. I had bought this from Greece (EU plug) and now have it in the...
  22. F

    Amplifier relay problem

    I have a Marantz SR7000 amplifier (240V / 50Hz) that has recently developed some problems. Normally when powering up the amp, there would be an initial clicking sound, a pause of 3-4 seconds, followed by a second click when the amp would start outputing amplified sound. In April 2024, when...
  23. L

    Does this mean I actually need a power conditioner?

    Hi everyone, My system always used a power conditioner/surge protector, mainly because I used to live in a place with very questionable wiring and a lot of ground issues. Having moved to a new apartment which is much newer and in which my system is on a group it doesn't share with any other...
  24. JonLewis

    Over protective Yamaha M-70

    Picked up a nice exterior condition M70, but in protection mode. I need to go through the M-70 threads and get my bearings, but this unit will be familiar to some already. First step was trying the DBT to verify protection. Consistent bright150w bulb, no clicks heard from the relays. I'm...
    • JonLewis
    • Thread
    • amplifier m70 protection yamaha
    • Replies: 65
    • Forum: Yamaha
  25. wildheritage

    WTB Altec 428-8A 10" guitar speakers

    Hi Everyone, i Have been looking for a long time now to buy 1970s Altec 428-8A 10" guitar speakers for my Ampeg VT-40. These speakers were an upgrade back in the day. I'd appreciate any feedback on how to find them. I keep endlessly searching ebay, craigslist and facebook. But no listings. I...
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