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Jason Gilliand
Jason Gilliand Posted on Nov 13, 2015
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Turntable with built-in preamp won't play on phono channel on technics sadx950, but fine on CD channel. Is phono channel dead?

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Uli Neumann

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  • Contributor 9 Answers
  • Posted on Nov 13, 2015
Uli Neumann
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A turntable with a built-in preamp should not be connected to the phono input, because the preamp of the receiver or ampifier will be overdriven. The task of a preamp is to amplify the very low level of magnetic cartriges to the high level needed to work a line input and does some equalizing work to the signal. You can check if your turntable has a switch to disable the built in preamp (mostly they are low-end quality), otherwise connect the turntable to a high level input like "Tape", "AUX", "TUNER", "MONITOR", or "CD".

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A

Anonymous

  • Posted on Feb 24, 2008

SOURCE: Using Technics SL-B2

check the antiskating. then i don't know.. maybe the tonearm has to be calibrate

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Anonymous

  • 515 Answers
  • Posted on Oct 08, 2008

SOURCE: Phono Preamp buzz

Ditto. Double check the ground cable. If it is connected, then try a different set of RCA cables. Also check the connections on your headshell/cartridge. Make sure all 4 wires are properly secure.

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Anonymous

  • 104 Answers
  • Posted on Apr 17, 2009

SOURCE: Connect a phonograph turntable to a receiver w/o phono connection

you will need a little box called a pre-amp. This hooks up between the turntable and newer receivers without a phono input. A basic explaination & drawing of this type of setup can be found here

http://www.turntableneedles.com/Pre-Amps_c_4.html

Anonymous

  • 1 Answer
  • Posted on Jun 18, 2009

SOURCE: Dead left channel

I have had the same problem on my 1210 MKII. I have taken it apart a number of times to replace the original lights with LED's, and naturally thought I messed something up in the reassembly. I actually found that the problem was in the connection between the tone-arm and the pick-up "housing".(Pardon my bad english) There is a little rubber band in between, and sometimes you have to unscrew the "housing" flip the rubber band, and screw it back on pretty hard. Also try cleaning the four contact pins before screwing it back on. I have heard of quite a few having this problem. A pretty obvious thing to do, but I had not thought of it, and it would have saved my from taking the entire machine apart several times.
Good Luck

smarthome2

Frank Fulton

  • 1114 Answers
  • Posted on Jul 06, 2009

SOURCE: Turntable output level too low and plain compared to CD, etc.

Get an external pre-amp. They range in price from 25-100 and more, depending on the capabilities. All over Ebay, and electronics sites. That will fix your problem. Hope this helps

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1answer

When I hook up my turntable to phono channel on my technical sadx950 i can barely hear it, and crackles. If I hook up to CD channel, it works. my turntable has built in preamp. Is phono channel dead?
You have to connect your turntable to a line-in input. The phono input is only for turntables without a built in preamp.
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Nov 13, 2015 • Audio Players & Recorders
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I am getting extremely faint sound from the left channel while playing vinyl. I have swapped all wires and cables left to right and back and the problem remains the same. The only thing I haven't tried is...
If you switch the cables so the left channel plays into the right of the amp and the sound stays dead in the left channel of the amp it's not the cartridge that is at fault by your amp. Amps have a magnetic cartridge pre-amp built into them for turntables. This can go faulty, but won't effect any other device (CD etc). Most of these pre-amps are a single IC. Which will need to be replaced.
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Oct 18, 2013 • Technics SL-1210M5G Turntable
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The sound is really low if i press the aux tape cd phono or vcr the sound is there but really low
Instructions:
Evaluate your current receiver. Take a look at the back-panel connections to make sure you don't have a phono input. In most cases, the phono input will be clearly marked. If the connections are not marked, look for a set of RCA-style inputs with a grounding screw next to them; this is a phono input. If there isn't a phono input on your receiver, see if you have an open set of RCA inputs. If they are all occupied by other equipment, you can disconnect one piece of equipment, buy an A/V switcher or get a new receiver--preferably one with a phono input.
2 Purchase a phono preamp. The voltage output of a turntable is much lower than those of other peripheral devices, including CD players, tape decks and game systems. Although the inputs look the same, connecting a turntable to a standard RCA audio input will result in very faint sound output, if you hear anything at all. The output of your turntable must be amplified to a level of about 150 millivolts (mVs) before it reaches the receiver, so a turntable "pre-amplifier" or phono preamp is necessary.
3. Purchase patch cables. You'll need a set to run from the preamp to your receiver. Measure how long your cables need to be, and purchase accordingly. Resist the temptation to "go cheap," because better-quality cables will provide better sound.
4. Connect the preamp into the system. First plug the preamp into an AC power outlet. Most models have a small AC-to-DC adapter built into the plug. Then connect the cables from the turntable to the preamp, and connect your new patch cables from the preamp to the receiver.
5. Adjust the gain of the phono preamp. Most models have a gain control for fine-tuning. Follow the instructions provided by the manufacturer and adjust your system accordingly.

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Is the Technics SL-10 turntable a pre-amped turntable?
No matter which cartridge you used on it you still needed a phono preamp.

http://en.wikipedia.org/wiki/Technics_SL-10

"Due to the low output of the moving-coil cartridge, the SL-10 included a built-in, bypassable step-up preamp to allow it to connect to standard phono inputs."
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If this does not help, please post the brand and model of both your receiver and your other turntable.
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When I hook up my turntable to phono channel on my technical sadx950 i can barely hear it, and crackles. If I hook up to CD channel, it works. my turntable has built in preamp. Is phono channel dead?

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