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power amp

  1. D

    Accuphase P-300/X/L/V

    Are there any Accuphase owners who can share (if applicable) their experience with the P-300 line of power amps? Any big sonic differences between the original P-300, the P-300V and the ones in between?
    • dnova93
    • Thread
    • accuphase accuphase p-300 audiophile hifi power amp solid state
    • Replies: 4
    • Forum: Solid State
  2. kennycrippen

    NAD 214 Troubleshooting

    I’ve been restoring a NAD 214 power amp with my 9 yo son for a fun learning project. He’s been doing great with soldering and staying interested. Initial symptoms were: unit powers on, soft clipping light stays on, no relay click. Front lights stayed on even after unplugging the unit suggesting...
    • kennycrippen
    • Thread
    • nad nad 214 power amp power supply power supply board relay restoration restoration help
    • Replies: 31
    • Forum: Solid State
  3. N

    Yamaha rx-a 1050 convert to power amp

    hi all first post here so please dont judge :) So im trying to convert a motherboard failed yamaha avr to a power amp just by using its transformer, amp boards and speaker terminal board ?( dont know the name of this board) all advise comes in handy . First question can i connect line in signal...
    • nikke92
    • Thread
    • amplifier avr diy power power amp power amplifier yamaha
    • Replies: 44
    • Forum: DIY
  4. K

    Marantz 2230 w/ External Power Amp - Switching speakers

    Good morning AK, I have a quick question... I have a Marantz 2230 that I use as a preamp connected to a Peachtree Audio Amp500 that powers my Infinity CS-3008 floor standers. A few months ago, I picked up a nice little pair of Kef Q150 bookshelf speakers on sale. I gotta say, I was VERY...
    • Kcusick81
    • Thread
    • infinity kef q150 marantz + 2230 peachtree audio power amp preamp solid state speaker selector speaker selector switch speakers
    • Replies: 3
    • Forum: Solid State
  5. Dav3

    Ashly CFT-1800 power amp

    I was junkin' yesterday and found a pristine looking Ashly CFT-1800 power amp rated at 17 W/Ch - 8 ohms, the thing is a beast. I've never needed or worked on a power amp, so this will be going to help fund projects closer to my heart, and I'm pretty sure others would love to have one. These...
  6. F

    NAD Power Amplifiers, which to get (calling NAD enthusiasts)

    Looking for a used power amplifier. I am currently using a Linn LK85 but my speakers are a bit bright so I think a 80s-era NAD is a good bet. I have seen 2140/2150 for around £150 and 2100 for £255. There is also a C268 for £325 but this is a 2020s Class D amp so probably not as warm but...
  7. R

    VU meter not working after Power Amp

    Hi people… I own CA-810 Yamaha and i tried to connect power amp to this amplifier. Using back panel PRE OUT. After everything been connected ….sounds good, but VU meters are not working! I tried using just Yam amp itself and VU meters works just fine. Is there a way to add Power Amp and having...
    • Raylancer
    • Thread
    • ca-810 power amp vu meter yamaha
    • Replies: 11
    • Forum: Yamaha
  8. D

    Pairing a NAD 3020 with a NAD 214

    Hello, anyone tried to pair a Nad 3020 with Nad 214? I would like to get a bit more punch from my setup and was wondering if this would be a working combination or if it will be more or less waste of money? I tried a Marantz 2252b in my room and it did alter the sound towards "fuller" but also...
    • Depth
    • Thread
    • nad214 nad3020 power amp pre amp
    • Replies: 0
    • Forum: Solid State
  9. F

    Accuphase P-266 bias adjustment

    Hi everyone! I have changed all of the capacitors in this power amplifier, including the filter capacitors, as the old Elna's were very swollen. In addition, I've replaced all relays as well. I am very happy with the results! Now, I need to adjust the bias in the "Normal mode" (class AB) and...
  10. Myvinyl333

    Music Hurts My Ears

    I've been experiencing discomfort in my ears after a few minutes of listening at level 3 (going right) on my NAD 356 CBEE integrated amp paired with Triad Gold LCR speakers. The Triads are rated to handle 450 watts 4 ohms while the NAD provides 60 watts at 8 ohms. I've had various upgrades done...
  11. J

    McIntosh MC2505 or MC2002?

    I currently have a MC 2505 Power Amp paired with a C26 Pre Amp and a MR 74 Tuner. I recently saw a MC 2002 pop up for sale where I live. Curious if you guys have heard both the 2002 and 2505 and if so which did you prefer? Kind of curious if it’s worth trading for the 2002. If I did trade...
    • jgduck
    • Thread
    • mcintosh mcintosh mc2002 mcintosh mc2505 power amp
    • Replies: 1
    • Forum: Solid State
  12. khileman

    Sony TA-3200F Crackling Noises

    I recently got a Sony TA-3200F Power Amplifier. It is in great cosmetic condition but seems very original in terms of internals. I am having a few issues with it, and I have some experience with electronics and soldering, but not much, so I'd really appreciate some pointers. I have done testing...
    • khileman
    • Thread
    • power amp power amplifier repair sony vintage power amp vintage sony
    • Replies: 11
    • Forum: Solid State
  13. J

    McIntosh MR74 bulbs and MC2505 bulbs??

    Can anyone confirm which bulbs are needed for a MR74 tuner and a MC 2505 power amplifier? Would love to swap in new lights for both.
    • jgduck
    • Thread
    • mcintosh power amp tec tech support tech talk tuner
    • Replies: 1
    • Forum: McIntosh Audio
  14. J

    McIntosh MC2505 Bulb Specifications??

    Does anyone know the exact bulbs required to make a MC2505 glow like new? I’m looking to replace all of them. thank you!
    • jgduck
    • Thread
    • bulbs mcinstosh power amp poweramp
    • Replies: 1
    • Forum: Solid State
  15. C

    Pioneer sx-737 bias issue max 1mV in one channel

    Hello, I found some really valuable info and help here, but I suppose it's time to start my own thread. I'm stuck for 3 days straight and frustrated to the moon. I got a SX-737 unit with fried transformer (secondary for full wave rectifier, pins 3&4 on the ps board). It's repaired now, but I...
  16. H

    Yamaha P2200 power amp - meter and lights cut out

    Yamaha P2200 power amplifier. The right channel’s huge meter and its lights cut out occasionally. A tap or two on top of the amp fixes things. I’d like to enjoy a more permanent fix; can anybody pinpoint where to look for a poor (solder) connection? Also, I remember hearing that the black...
    • Hifibythekg
    • Thread
    • ic chips meter meter lamp p2200 power amp yamaha
    • Replies: 5
    • Forum: Yamaha
  17. S

    Adcom GFA5800 Power Switch LED is out

    Power LED on Adcom GFA5800 is out. How to replace, what part, etc. Thanks a million to anyone who can help!!
    • SeattAl
    • Thread
    • adcom adcom 5800 led power amp repair switch
    • Replies: 0
    • Forum: DIY
  18. Schmurpy

    Hitachi HMA 7500/8500MKII power meters needed.

    Hello, Hitachi HMA 7500/8500MKII power meters needed.
    • Schmurpy
    • Thread
    • amplifier power amp preamplifier receiver vu meter
    • Replies: 10
    • Forum: DIY
  19. W

    Carver PM-350

    I am working on a Carver PM-350. The only schematic I can find online is low res and hardly readable. Does any generous soul out there have a better schematic, and will share it with me? The board layout drawing would help too. A ledgeable trace side drawing would be great too. I want to fix...
    • Way San
    • Thread
    • carver pm-350 power amp schematic trace diagram
    • Replies: 1
    • Forum: Solid State
  20. Kim Beneteau

    SX-950 Low output amps

    I've recapped all boards except for the tuner. On the bench I'm running a couple of mini JBL surround speakers to check for sound L/R operation. All seemed good, dragged it upstairs and hooked up to a pair of Infinity P363's and good clear sound. However, it seemed odd that as I turned up the...
  21. Engel

    What to pair with an old Mosfet power amp?

    Lucky enough to pick up an old power amp for only $30. Guy said it was used for parties, events, etc. He said it turns on but he hasn't tried it with speakers so who knows. It's a Mosfet amp rated at 300 watts (per channel?) according to the label on it. Made by an Australian company called...
    • Engel
    • Thread
    • mosfet power amp solid state
    • Replies: 2
    • Forum: Solid State
  22. James Cox

    Marantz 240 possibly blown

    So my friend called me up today and was very distraught. He purchased a Marantz 240 and 7t preamp a few months ago and was experimenting with some separate phone preamps he had. The problem came when he was switching around the phono preamps with the amp and stuff on and accidentally hit the RCA...
    • James Cox
    • Thread
    • marantz marantz 240 no sound power amp shorted rca
    • Replies: 5
    • Forum: Marantz Audio
  23. James Cox

    Scott LK-150 restoration thread

    Hey everyone! Ive finally decided to do a full restoration thread from start to finish after scoring a good deal on a Scott LK-150. I've ordered the parts and have most of them on hand but still waiting for some stuff from Jim Mcshane. The amp came without any tubes but I've got some lined up...
    • James Cox
    • Thread
    • 6550 diy lk-150 power amp restoration scott tube
    • Replies: 76
    • Forum: Tube Audio
  24. James Cox

    Kt-120 compatibility with Scott LK-150 tube amp

    Hey everyone, I'm in the process of picking up a Scott LK-150 but unfortunately it has no tubes. I was wondering if anyone here has tried KT120 tubes on this amp or of they draw too much current to be safely used here. When it gets here this piece is going to need a decent amount of work before...
    • James Cox
    • Thread
    • 6550 citation ii kt120 kt88 lk-150 power amp scott tube amp
    • Replies: 16
    • Forum: Tube Audio
  25. Racingh11

    Adcom GFA-565 service

    I finished restoring a pair of these amps. They both had DC offset issues among other things. After messing around with the original board on the first one, I found it had current leaking into the DC servo opamp ground reference. I removed everything from the trace and it was still there around...
    • Racingh11
    • Thread
    • adcom driver board gfa-565 gfa565 power amp
    • Replies: 11
    • Forum: Solid State
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