Question about Audio Players & Recorders
I am recording my vinyl at 24bit / 96kHz. Occasionally a record will be recorded low and will be close to the noise floor. I would like ot get a preamp to increase the gain but the preamps I see on Amazon ( http://www.amazon.com/gp/product/B00025742A/ref=s9_simh_gw_p23_d0_i1?pf_rd_m=ATVPDKIKX0DER&pf_rd_s=center-2&pf_rd_r=175P8RZZQ8QG8KA076VG&pf_rd_t=101&pf_rd_p=1688200382&pf_rd_i=507846 ) say they have a response of 20Hz to 20kHz and I am afraid that will "clip" my 24/96 recordings. Am I correct? What unit should I be looking for?
If you are increasing the level of an analog turntable's output, a preamp with 20-20,000 response will work just fine. It's unlikely any record will even approach 20K on the high end.
Posted on May 15, 2016
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Posted on Jun 14, 2014
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Posted on Jan 02, 2017
SOURCE: Preamp Noise
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Posted on Jul 20, 2008
SOURCE: Preamp noise
First thing to check is that the phantom power is not turned on. If you are using a condenser mic, then it should. If you are using dynamic mic, then it will crackle and makes weird noises in the manner you describe. Other than that it sounds like you have a failing op amp in your preamp. This sort of repair work is not expensive(with respect to the outcome). I would anticipate $40-60 to fix it. Trouble is you can replace it super cheap at the moment 45% off for $64.95plus $9.95 shipping from zzsounds
So I guess that it may not be worth repairing, and more a replacement item for that money. If you have a mate with electronics experience, you could just replace the opamps at home for $10 worth of parts.
If you think my advice helped you to work out what to do, a FixYa rating would be great. Cheers
Posted on Jul 21, 2008
get a can of cold spray from an electronics industry supplier.
it cools to -51 f.
you have a bad transistor in the phono stage.if you spray it with freeze,the noise will go away.
i would just replace those transistors,
some have an op amp like a ua741 8 pin chip.
that will cause the same problem.
there is a fet version of the op amp,same problem.
if you get an audio tracer,you will hear the noise,and where it is coming from.
you can use an oscilloscope,but they cost 1000 and up.
you will see the noise waveforms.
Posted on Sep 06, 2009
According to this listing I found on eBay it will work for you.
PYRAMID Stereo Control Pre-Amplifiers
* Power On/Off Switch w/LED Indicator * Microphone Input Jack * Microphone Level Control * Bass/Midrange/Treble/Loudness/Balance Control * Master Volume Control * High/Low Frequency Filter * Stereo/Mono Switch * Muting Switch * Input Source Selector * Tuner/CD/Aux/Phono Input RCA Jacks * Tape Monitor Switch * 110/220 Voltage Switchable * Rack Mount Design * Dimensions: 19''W x 2.375''H x 8.5''DAs far as grounding the TT, if you must, just use any screw on the preamp chassis.
Posted on May 17, 2010
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