Question about Technics SUV500 2-Channel Amplifier

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When i make phono input..The Volume come very big.And all other input selecter volume come normal.

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  • Scott Frye
    Scott Frye Sep 14, 2010

    Hi...What are you running into the "phono" jacks?

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  • Technics Master
  • 5,056 Answers

As long as the phono input is only being used for a record deck the most likely cause is a faulty magnetic cartridge pre-amp. If you are connecting any other device to these sockets, remove it and place it in another socket. If you haven't got enough sockets you can get a switching box to solve the problem. If you are getting the problem due to a record deck, make certain it hasn't got a built in pre-amp first, check the cartridge and wiring to it and all deck connections. If still no luck then you will find that you need to replace the pre-amp. It will be a single IC, which can be found by following the wiring from the phono sockets inside the amp.

Posted on Sep 21, 2010

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1 Answer

Jvc l-A31 turntable volume not very loud, is connected to a amp with phono inputs, wires are connected to the cartridge...


Hello Charles.

Maybe you use the wrong pickup system.
Normal Phono inputs are just for MM-Systems.
MC-System needs other Pre-Amp.
Some newer Amps have a switch (mostly near the Phono inp.) to select MM- or MC- system. (MM means Moving Magnet-Sys. and MC is Moving Coil-Sys)

Best Regrets Gue.

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but the real tek must be ur audio driver.

was the same one bundled with ur mother board disk?

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My 1974 panosonic turntable has a low volume out of the receiver.


Are you sure you are going into a phono preamp? Turntables cannot work correctly if connected to the receiver's aux or tape input as they require much more volume boost which the phono input privides. Not many newer receivers have a phono input but an external phono preamp can be added (usually under $20)

Oct 07, 2014 | Audio Players & Recorders

1 Answer

Turntable hookup to AUX or CD (no Phono input) only producing very weak sound, even at full volume


You are doing nothing wrong at all. It's just that as you say it has no phono input. Which means the sockets you have will NOT amplify the signal. So you need to buy a magnetic cartridge pre-amp and once connected to the aux the weak signal will be at the normal level.

Jul 11, 2017 | Pioneer VSX-818V-K Receiver

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Old turntable given to me. sanyo tp 728 plays records, but volume very low. volume on stereo on full to hear quietly


Are you feeding the signal into the PHONO input? If not, then the volume will be very low. Make sur it is a PHONO input, not all receivers have them now.

Mar 23, 2010 | RCA Audio Players & Recorders

2 Answers

Phono plays lower in volume than cd and tuner. Sounds ok i guess but is about a quarter to one third lower in volume. Is this normal ? Can I plug phono into cd jacks to check if any better ?


Hello. As per the post before me, if you have a receiver with a Phono input(many receivers don't have one anymore) the output of a phono cartridge is around 30 millivolts, vs 300 millivolts for a CD(10 times the amount) or any other line level device. A Phono preamp, also has RIAA(recording engineering standards)Equalization that provides the proper equalization for a Phono cartridge. As per the other post, yes, it will sound very low, and unnatural sounding. If the input you are plugging the turntable input into, doesn't say Phono, you can purchase an inexpensive Phono preamp made just for this very issue. You can try Radio Shack, or find something of better quality on the Internet.

Regards,

Dave

Jan 11, 2010 | Pioneer VSX-453 Receiver

1 Answer

I just bought a pioneer pl-200 turntable at a flea market. I plugged it into an old am/fm/8-track amp's phono input and I know the amp cranks on fm but on phono, it's very low sound. It does get louder...


Turntable signal outputs are very, very low amplitude and either have to pass through a pre-amp before being connected to an amplifiers "ordinary" inputs (e.g. aux), or connect to an amplifier's specific turntable input in order to give the "normal" levels of volume.
This is because the cartridge (the bit that has the stylus or needle on it) can only generate very small amplitude signals.
As turntables are now outdated, a lot of amps no longer have a turntable input any more.
Unless you can also find a cheap pre-amp or an old amp with a turntable input, you may have wasted your money.

Sep 21, 2009 | Audio Players & Recorders

3 Answers

Distorted sounds


The AT-PL120 uses a magnetic cartridge to extract a music signal from the record. Magnetic cartridges all put out a very weak electric signal, and so their output must be strengthened, or amplified, to where it is as strong as the input from, say, a CD player. This amplification is provided by a pre-amp. If your receiver has dedicated "phono" inputs the pre-amp circuits are already in the receiver. If you do not have dedicated phono inputs you must either buy a pre-amp, or buy a magnetic cartridge turntable with a pre-amp built into itself. The AT-PL120 has a built in pre-amp. You can switch the AT-PL120's preamp on or off. The switch is located under the platter at the back side of the turntable. Take the platter mat off and turn one of the platter's holes to the back and you should see the switch through the hole. If you push the switch to LINE OUT the preamp is turned on and the turntable sends an amplified cartridge signal out the cables which MUST be connected to a receiver inout suitable for a CD player (a "high level" input). If you push the pre-amp selector switch to PHONO OUT the turntable sends the weak unstrengthened cartridge signal out the cables which MUST be connected to the receiver's dedicated PHONO inputs so the signal can be amplified with the receiver's own pre-amp circuits.

If everything is set wrong (i.e. LINE OUT (pre-amp on), and connected to phono inputs) you are applying two steps of strengthening to the turntable's signal which is too much. The resultant sound will be garbled. Try not to do this!

The other way to do everything wrong is set the pre-amp switch to PHONO OUT (pre-amp off) and connect the turntable's cables to a high level input. If this happens the turntable signal receives no amplification and the resultant sound will be thin and weak.

May 09, 2009 | Audio Technica AT-PL120 Turntable

1 Answer

Audio level of Stanton T90 Turntable connected to speaker system


You can use either type of input but you have to tell the Stanton which one.

I hope you realize that "Phono" isn't just a generic connection with a different name. It actually goes to a preamplifier (either in the Stanton or in your receiver) that not only raises the level of the signal but radically modifies its frequency respone via the RIAA curve (look it up) to make it normal.

A normal turntable without internal electronics would not have the LINE option.

1) There is a switch marked PHONO/LINE on the rear apron.

2) Select PH if you're connected to PHONO on your receiver or select LINE if you're connecting to a line level (non-phono) input, say, a soundcard or a standalone amplifier without a a phono section.

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3 Answers

Volume


Please let me know how your turntable is connected to the music system. I mean, to which input ? (Tape/Aux/Phono/VCR/CD) ?

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