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Celestion csw subwoofer, Speaker relay does not close. When putting a spkr on input of speaker relay there is sound, Relay driver transistor has .6 volts on the base, but only 15 volts on collector..

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Posted on Jan 02, 2017

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SOURCE: the 130 volts relay is

If the all said voltages are there and still the relay doesn't work check the transistor drive it and the relay itsef. Relays will have the voltage and its coil resistance marked on it. Check it coil resistance and be sure it comes to the marked Ohms. If has the proper Ohm resistance, check the transitor drives the relay for open [usually collector to emitter]. If the transistor used there is a PNP type, coltage at its base should be low, and if its an NPN type the voltage should be high inorder to drive the relay.
Check whether the base voltage of the said transistr varies, that is going up and down, during the power on and off switch on the remote control If there is no volgage change, the voltage remains constant all the time, check the power on off voltage chage at the respective pin in the system control Ic. If there is voltage changes and there is no voltage changes in the transitor said. means there are some trouble between the path, and check whether other drive transistors are used in between them. If so check it too. Ok.

Posted on Oct 27, 2010

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SOURCE: No signal through main amp

If the speaker relay does not activate, then the amp is in protect mode. There is a problem in that has been detected in the final stage of the amp. You indicate that you have 4V at the power transistors. That is likely the B+ voltage. What is the reading at the other 2 pins? Please post that and I should be able to give you some ideas.


Posted on Feb 22, 2010

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SOURCE: a voltage drop from 12 to 6 volt or find the cuase of it

I'd start by checking ground connections. How are you checking voltage at the relay? Across the coil, or coil to ground? Coil to ground is important to check.

Posted on Oct 23, 2015

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Voltage is relevant to where you live in the world. America it's 110. Europe mostly 220.
What you're asking is a very deep and complicated question.
I'm attaching a link with some articles.
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Since these can be bi-amped or bi-wired (and you don't indicate if that is the case) you need to make sure the jumpers are secure (see the last picture or (if the jumpers are removed) that you have viable amplifier signals coming to each speaker within the cabinet.

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If they are single voice coil speakers (1 positive and 1 negative terminal on each speaker) then connect from amps' Positive output terminal to spkr. 1 positive terminal, THEN spkr. 1 neg. terminal to spkr. 2 positive terminal, THEN spkr. 2 negative terminal to spkr. 3 positive terminal, THEN spkr. 3 negative terminal to amps' negative output terminal.

That is 3 speakers wired in series. if each spkr is 2ohms, then you will have a total 6 ohm load. If 4 ohm spkrs., then a total 12 ohm load, if 8 ohm spkr., then a total 24 ohm load.

Be careful because amps do not like these odd ohm load totals. You might get away with a 6 ohm total load. Depends on the amp.

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The easiest solution to use your subwoofer is to buy an amp for it. Any old stereo receiver from a garage sale will probably do just fine.
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  2. connect both speaker outputs of the cheap reciever to the speaker input on your subwoofer. make sure both black (-) outputs on the reciever connect to the black input on the sub, and the red outputs (+) on the reciever are both connected to the red input on the subwoofer.
  3. make sure the cheap receiver's volume is all the way down. turn your Sony up to about the loudest you'll listen to it. turn up the subwoofer amp until it's loud enough to sound good.
  4. leave the subwoofer amp alone, the Sony volume will all you ever need to touch from now on.

You can even now turn off your subwoofer / adjust the volume easily now!

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