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Zetagi amplifier b300p

How to repair •Built-in Preamp on zetagi b300p

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1 Answer

I need a diagrram to repair the preamp it turns on but no sound comes out


repair the preamp? or repair the amp? what have you checked so far?

Jun 25, 2016 | Car Audio & Video

1 Answer

Turntable with built-in preamp won't play on phono channel on technics sadx950, but fine on CD channel. Is phono channel dead?


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".

Nov 13, 2015 | Technics Audio Players & Recorders

1 Answer

Can I use a turntable with this system?


If the Aux is Audio in then I don't see why not. The turntable would have to go via a magnetic cartridge pre-amp though. Or the sound would be too low to really hear.

Apr 30, 2015 | Bose Built-invisible Ta-1 Theater...

2 Answers

RIAA preamp


Just plug the turntable into your phone inputs. If there is next to no volume then you need a preamp because you have a magnetic (low output) cartridge. If you have a piezo type cartridge the output should be enough to drive the amplifier to rated output. Of your unit does not have a phono input I can tell you that it definitely does not have a preamp built in.

Mar 17, 2014 | Technics SA-DX930 Receiver

1 Answer

I have my PL-5 hooked up to an amp and speakers. The only way I can hear it is by turning the volume all the way up on the amp. Even doing that the volume is very low. The weird thing is with the amp...


You need to buy a turntable pre-amp, as the signal output is much too low to drive an amplifier. Or buy a DJ mixer, which has a turntable preamp built in, as does any "integrated receiver" which is basically a tuner/phono preamp/amplifier combo in one box.

Nov 17, 2017 | Pioneer Audio Players & Recorders

2 Answers

Onkyo integra P3099 pre-amplifier needs new volume control. Where may I buy one or get it fixed. Local repair shops say this part cannot be found or replaced. Any help would be greatly apprciated.


Local shops sometimes don't try very hard.
If this is a valuable unit, parts can be shipped in from Japan or wherever... go to the Onkyousa.com web site and find your nearest service center.
If you are near Houston, find me. I repair audiophile gear.

Dec 17, 2013 | Audio Players & Recorders

1 Answer

How do I put my car stero in auxiliary mode


how to put your amp in aux mode is that the question? I would think that your head unit should be taking care of the aux modes. Your amp is only going to amplify the sound sent to it it's not like a home stereo that has a preamp built in that's what the head unit does on car audio.

Mar 30, 2013 | Rockford Fosgate Punch P5002 Car Audio...

1 Answer

Yamaha m70 amp and c70 pre-amp right speaker stopped working


First, lets's determine if it's the amp or the preamp...

Swap the Left and Right channel cables between preamp and the amp with each other.

Did it stay on the right? = amp problem.

Now on the left? Preamp or source.

Plug any Line Level device (CD?) directly into the amp inputs. Work now? Preamp problem.

ALL sources? Preamp - toggle all controls, especially a Tape Monitor to possibly wipe of any built-up oxides in them.

May 31, 2010 | Audio Players & Recorders

1 Answer

My boss MT-2 plays is extremely quiet when turned on, the clean channel comes through great, as soon as i turn it on its hardly audible, using the boss power supply, with correct ins and outs, and tested...


It is possible the pedal is DESIGNED to be used with an amplified (preamp within guitar) and yours MAY be a passive guitar. You did not tell us what guitar you have.
Many of the processors for guitars depend on having a "line level" signal and that requires that your guitar has a built in preamp.
If your guitar doesn't have a preamp in it, buy a preamp to put ahead of this pedal.

Apr 28, 2010 | Boss Mt 2 Metal Zone Effects Pedal

1 Answer

When I plug it into my amp there is a staticy


yes there probably is a dry jopint on the wiring or the jack input isnt tight enough also the battery connector could have a dry solder or looose connection I would go for it if the price is low and just spend a few bob to solder it or check the connections.Good Luck

Sep 29, 2009 | Fishman PRO EQ Platinum Bass Preamp...

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