pre-amp

  1. dylan_k

    Replacement Power Adapter for a TC-750LC Pre-Amp

    I've read that there can be improvements by upgrading the power supply for a phono pre-amp like my TCC TC-750LC. What I'm having trouble finding, though, is the make and model number of any power supplies that can provide this improvement, or any specifications. The power supply that came with...
  2. J

    PS Audio 4.5 Pre-Amp - Wowzers.

    Have recently had the opportunity to listen to a PS Audio 4.5 and I am currently amazed with how great this little pre-amp sounds... or how it does not sound like a solid state piece. Been listening to LP's; OP Amps are stock actually everything but the transformer is stock... Open, Warm, Wide...
  3. AshhBoy_

    DBX CX-3 loud buzzing noise R-channel only

    Hi, I think I might have made a mistake with my newest purchase... Long story short, I have been using my DBX-BX3 for a good while after fixing it, and wanted the DBX CX-3 stereo preamp to go along with it for a long time. I just bought the DBX CX-3 pre-amplifier from a shop in the USA, while...
  4. mozcho

    Tube Sound: Pre-Amp or Power Amp

    In my quest to look for a pre-amp for my MC2205, a new question popped up in my mind: Which is more important in producing the tube sound? The pre-amp, or the power amp? The 2205 is currently fed by the pre-amp section of Marantz 1060, just because I have a Rega Planer 3 TT, or else I'd just...
  5. wildesmith

    Looking for a Pre-Amp/tuner to mate with Tannoy HPD's and a Bryston 4B

    Any experience? I have been using a Marantz 1180DC but it has come down with intermittent drop outs and no one can seem to figure out the problem, so I am resurrecting my Bryston 4b, which I think/know the Tannoy HPD's will like as they like Solid State as long as the power is huge so the SS...
  6. I

    Adcom GFA-585

    I've been a longtime lurker, but I've finally got some questions. I picked up an Adcom GFA-585, that is in good physical condition. I tested the voltage across the speaker terminals during start up, and warm up, and had it stabilize well under the 30mV suggested by EBC Electronics. I have no...
  7. thorpej

    A 6AS7-based pre-amp with tone controls

    A couple of years ago, @kward started this thread: https://audiokarma.org/forums/index.php?threads/thinking-of-building-a-low-gain-preamp.783332/ In response to that thread, I ran a couple of experiments with a 6080 that showed some promise, and then promptly put the idea at the tail of the...
  8. William907

    Realistic 42-2930 pre-amp

    I would love to hear any opinions of, and experiences with, this vintage pre-amp. What modifications can be done? What components should be replaced? Thanks!
  9. mozcho

    Pre-Amp for McIntosh MC2205

    Hi everyone! I am new here. I'd like to seek advice: I have just bought myself a used MC2205, mainly driving a pair of vintage Spendor SP1/2. I also have a Maranzt 1060 amp driving JBL L110 and TDL RTL-2 speakers in my bedroom. For the MC2205, my main sources are the PC and DAP (Fiio X5iii)...
  10. thorpej

    Pre-amp power supply needs a sanity check please!

    So, I'm about to dive into building a low-gain 6AS7 / 6080-based stereo pre-amp, and was talking to a buddy about it and he expressed interest in it, but he wants tone controls and a phono stage. "Ok, sure!", I said. I need ~160V for the 6AS7 gain/output stage (that will be loaded with a CCS)...
  11. Z

    Recommendations for a modern pre-amp/receiver

    Hi all, I'm ideally looking for a single quality unit that will accept phono inputs from a turntable and output 1) a high quality digital signal for input into a computer but also 2) output to a regular, non-powered pair of speakers. This may be an unusual request but having one unit that can...
  12. joshvito

    Review: Upgrading a MC Phono Stage

    A review of The Black Cube from Lehmann Audio in comparison to the Parasound zPhono. This article will not go into details on why one needs a phono stage in their HIFI system. It will assume the reader knows the basics of vinyl playback on modern HIFI stereo systems. Notes on the gear involved...
  13. Richs_Trains

    Marantz 1150 Help!

    Hey all, Been awhile since I played around, been tough since Kim passed. Found an 1150 that the seller said was packed poorly and dropped in shipping. It had the usual bent faceplate and a busted shaft. The seller had purchase the new board with the "stereo" shaft attached and included it...
  14. A

    Questions about preamplifiers

    I am a vintage integrated-amp, vintage receiver kind of a person and sometimes a user of AVR type stuff to drive 2 channels. So, I don't have direct experience with preamplifiers and I have accumulated some general questions that I am not finding good answers for via searching. 0) I am not...
  15. Mark_71

    Cambridge Audio Azur 651p Pre-Amp Not Working

    I have a Technics SA-700 receiver and normally I use the built-in phono stage. It's always worked well, in fact, the built-in phono input has worked on all my old vintage gear. But I've always been curious about what an external pre-amp would sound like. I tried this once before. I already had...
  16. powerpcme

    Looking for an electrical engineer to design a phono pre-amp!

    So i've been playing with the idea of making a simple phono pre-amp that I could build myself. I thought about it some more and I figured if I could find someone who knows what they're doing and they could design a PCB with the best components and we could make a DIY kit for it. I also got a...
  17. B

    SX-750 Left channel PreAmp issue

    Hi! I'm first time here, so please let me know if I'm doing something wrong! I'm looking for some help on an issue my Pioneer SX-750 has developed recently. The left channel has a problem audible, while the right channel seems to be fine. The issue I can hear on the left channel I can describe...
  18. Mørbeck

    Which pre-amp/amp for my Marantz 2230/Ar4ax system

    Hey everyone At the moment I have a Marantz 2230 powering a pair of Acoustic Research AR-4ax. Both are serviced and recapped and sound nicely. I am interested in stepping up the system's game by introducing a pre-amp. I was looking at a defected Luxman LV 113 amp today for a friend and since he...
  19. Yester_Year

    Realistic STA-2000D pre-out question, Help please.

    Hello all, I have a question about the receiver. It has pre-outs to go to a amp BUT, in the owners manual it states the following: "Note: the receivers volume, balance, and tone controls are all in the circuit in front of the pre out jacks thus, any external equipment you connect between...
  20. thorpej

    Triode gain stage with local negative feedback - examples?

    Howdy folks... One of the projects in my queue is to build a simple 3-or-4-input pre-amp for each of my kiddos ... for practical reasons, my son needs something to easily switch between at least two inputs on his amp (he recently inherited my wife's dual cassette deck and is having a field day...
  21. Richs_Trains

    1070 unbalanced volume

    Hey All, I have a 1070 that I have recapped the power amp, pre-amp/tone and power supply. I am able to adjust the DC offset and bias to spec of 0mv and 10mv and they hold steady for both channels. My problem is the left channel is noticeably louder a brighter than the right. I have listened...
  22. jbdyson

    Does Fisher 800B have a main in hookup?

    Maybe a simple question, but I'm interested in using my Marantz 2270 as a preamp with a Fisher 800b's main amp section. From pics, it's not obvious how I should hook it up on the Fisher end. I've purchased the Fisher, but not yet received the unit. Any advice on the best way to go about this...
  23. B

    Sony E80ES Problems, please help if you can, thanks

    This preamp I bought locally from a vintage store. It seemed to work fine for awhile but now it gets stuck, you can change components or volume or nothin untill you actually diconect the power plug. When not hooked to system it works flawlessly. I am reall stumped and so tired of installing...
  24. G

    Blond moment??

    Hi, I've bought a second hand vinyl set up piece by piece from ebay. A Yamaha TT-300 turntable Rotel RA8408X3 amplifier A pair of Mission 760 monitors I switched on and I have that common problem of the set-up not seeming to have much volume. I can turn it up full and it gives me a plesent...
  25. S

    In search of audio mute relay (Crown)

    My Crown SL-1 preamp has an apparent issue with the audio mute relay. Any suggestions for finding a replacement? I have no idea if this was made specifically for this unit or if it was mfctd for other units or companies. I do know that Crown no longer supports the vintage stuff from the 70s...
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