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preamp

  1. A

    Does anyone recognize this odd sound?

    I recently plugged in a vintage power amp and preamp. I got close to the right speaker I can hear the noise that you'll hear in the video that I posted the link to. It's a very quiet distortion/hiss sound. After swapping through cables switching speakers around, I figure that the culprit must be...
  2. Z

    Help diagnosing noise in a Marantz 7 circuit

    Hi All, First post here. I have a Marantz 7 pre-amp that has persistent noise to it. The audio affliction is composed of both a high frequency whine and a lower frequency rhythm, with the whine similarly being of higher decibel and the rhythm being similar to the tapping pattern a...
  3. forceof1

    Preamp Issues/Recommendations

    System consists of........Marantz 250, Klipsch Quartet spkrs, Pioneer PL550, Pioneer PL-L1000 (which has developed a mind of it's own and is hopefully being fixed) and an old Sansui table with it's own Rolls preamp. .Then theres my Nikko Beta 50 preamp. Nikko. None of the table's produce...
  4. Alonia

    Yamaha C2a 2SC1913/2SA913 replacement

    While searching for a replacement type for the transistors TR527/528 -> 2SC1913 and TR529/TR530 -> 2SA913 I found the following transistors as comparison type: 2SC1913 --> 2SC5171 (obsolet) --> 2SC4883 or 2SC4883A (digi-key) 2SA913 --> 2SA1930 (obsolet) --> 2SA1859 or 2SA1859A (digi-key) I...
    • Alonia
    • Thread
    • preamp repair replacement transistor yamaha c2a
    • Replies: 7
    • Forum: Yamaha
  5. M

    Yamaha Ca-810 Phono/Preamp Volume

    Hello I recently recapped my Yamaha Ca-810 amplifier. Everything seems to be working very well with the exception of the phono inputs having very low volume. The AUX, tuner, etc. have significantly higher volume levels. When listening to a record, you must turn the volume knob past the halfway...
    • MarklSav
    • Thread
    • low volume phono preamp yamaha ca-810
    • Replies: 1
    • Forum: Yamaha
  6. T

    Pioneer C-90 Preamp - should I stay or should I go?

    Hi all, Quandary based on Ebay treasure hunting: I've had the Pioneer M-90 amp for a year now, from a local craigslist ad. It's been a rock solid and rather wonderful amp. I do love bouncing lights to entertain my pea-sized brain whence thumping Thundercat. I've been looking for the...
  7. Wray & Ting

    Upgrade Phono Preamp next?

    Hi all, I have a vinyl setup that I'm fairly happy with at the moment, but I'm always looking for the next weakest link to upgrade, especially if I can do it on the cheap. I'm wondering if the next move is to upgrade to a separate phono preamp. Here's my current signal path: Planar 3 w/ R200...
  8. Richard P

    Peerless 8-Track Receiver Weak Phono Output

    I'm repairing a junk Peerless HSP-25A 8-track reciever so I can learn about these old systems and have run into a strange (to me) problem. The AM and FM sections now work great, as does the 8-track, but the phono inputs on the back produce very low output. Looking through the schematic...
    • Richard P
    • Thread
    • 8 track peerless phono preamp receiver tuner
    • Replies: 2
    • Forum: Tuners
  9. 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...
    • AshhBoy_
    • Thread
    • dbx humming pre amp help pre-amp preamp trouble shooting vintage
    • Replies: 0
    • Forum: Solid State
  10. MBuras

    Help following SX-828 preamp schematic - troubleshooting dropped channel

    Backstory. Fully rebuilt this SX-828 about 3 years ago. Been fine until recently. Started dropping the left channel. Usually within the first 5 minutes of power on and doesn't matter phono, aux, etc. -injected sound directly into amp section and both channels were fine for 30 minutes...
    • MBuras
    • Thread
    • drop channel left channel pioneer sx-828 preamp troubleshooting
    • Replies: 5
    • Forum: Pioneer Audio
  11. Sgrobstein

    McIntosh C20 Noise Issue

    I have a McIntosh C20 that has been completely restored (All caps and resistors replaced). There is an inconsistent noise coming from the unit. Noise is louder in the phono section. Noise appears about 1x per second but is inconsistent when it shows up. There is a consistent sounding noise...
    • Sgrobstein
    • Thread
    • c20 help needed mcinstosh noise noise preamp noise pre amp help preamp
    • Replies: 11
    • Forum: Tube Audio
  12. lattiboy

    Pre out levels seems lower than published specs on my Marantz receiver

    Hi all, I have a split HT/2ch system. For music it’s an external DAC into the analog CD input of a Marantz SR6012 which has analog pre outs feeding an Onkyo M-504 power amp. As a test, I hooked up a Onkyo P304 preamp being fed the same DAC to the M-504. Conservatively it’s 2-3 times louder at...
  13. V

    Linn Inbuilt Phono vs Standalone

    Hi there First post here so please be gentle!! In your opinion would the MC phono section of a Linn Wakonda preamp be better or worse than a Trichord Dino 3 phono stage (unmodified). Thanks in advance..
  14. P

    Phono Preamp Kit Recommendation

    I am looking for recommendations on a significantly improved diy phono preamp for my analog system. The sonic performance is currently really quite good: full bass, good separation and sound stage, and very realistic. Would I be better with a solid state or tube preamp. (1) Lenco L-75...
  15. T

    Budget Vintage Phono Preamps

    I'm looking for a vintage phono preamp my budget is 50-100 dollars any suggestions. Thanks
  16. Danzilla

    Sale listings painful to see.

    Hey. I think most of us that shop the local sales regularly have a few listings they've seen a little too late that were so wrong we can even feel bad for the seller. Happened to me today and I wanted to share. I don't imagine having had a shot at it, being already "sold" and posted 10 hours...
  17. toby7362

    Receiver?

    Hello, new to forum and new to turntables. I just acquired a Yamaha Yp-d71 turntable. It appears to be in great shape and sounds nice. I also have a Kenwood receiver 2600 which is ok. My question is do I need the receiver or can I just use a preamp and not use the receiver? Is there a need for...
  18. C

    Marantz 2230 pre out output impedance

    Hey guys. Does anyone know the pre out output impedance for a Marantz 2230 receiver please? I swear it’s not in the manual or service manual I’m trying to use it as a preamp with a Bryston 4 ST (input impedance of 50k ohms unbalanced) and I’m getting barely any sound through I didn’t expect...
  19. Jeremiwvu

    Phono Stage - Preamp recommendations

    I'm looking to upgrade my phono stage, along with my turntable. I think I have the turntable figured out but preamp's are confusing, and I have had trouble finding much info about them or threads discussing options on here. If there are threads people have feel free to link, I will read...
    • Jeremiwvu
    • Thread
    • mm preamp mm stage phono stage preamp turntable preamp turntable stage
    • Replies: 13
    • Forum: Turntables
  20. S

    Grounding question for a somewhat convoluted setup

    Hey guys, I have a question about grounding in a setup that I want to use to play 78s. It's kind of convoluted, but I think it will work well once I get the grounding figured out. I don't have much technical knowledge about grounding, but I do want to make sure that I don't damage any of my...
  21. Kingpin5

    Marantz 3200 into a Dynaco ST-150

    Having a brain freeze. Can a Marantz 3200 Stereo console preamp be jacked into a Dynamo ST-150 amp without fear of damage to either? Thanks
  22. QSilver

    100Hz hum on preamp output

    As the title suggests, I've got a hum out the output of my pre-amp. It's a Pioneer C-90 paired with an M-90. I've rested the M-90 separately and its totally silent. When reconnecting to the C-90 I get a hum through the speakers. When hooking a scope up to the output, I've got a small waveform...
  23. mymonkey

    Hafler DH-110 preamp refurb

    I'm new to power amp / pre amp separates. learning fast, picked up a Hafler DH-110 pre and took a chance that it was in good working order to find it quirky with static and low signal in one channel. Switches are worn more than i would like and although the unit is a tank, I know i am not...
  24. P

    Dead NAD 106 preamp

    Hello, First post here - thanks for reading! :) I've bought a used NAD 106 preamp. I know it's nice, but not this one - is hums all the time when connect to amp or active speakers. Sound like 50hz hum from the psu. Everything looks very nice on the pcb and no visual errors to be seen, the pcb...
    • Peer
    • Thread
    • hum nad nad 1000s nad 106 noise preamp
    • Replies: 12
    • Forum: Solid State
  25. P

    Using an Amplifier, Marantz 2330

    Hello, I'm looking at getting a Marantz 2330 and there's a question that I have. With the speakers I just got I'm afraid that I need some power to really drive the speakers (100W+). My question is.... If I get an external amplifier for the 2330 and only use the preamp within the 2330, am I...
    • P-SX950
    • Thread
    • amplifier marantz 2325 marantz 2330 preamp
    • Replies: 5
    • Forum: Marantz Audio
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