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Old 29th September 2006, 11:22 AM   #1
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Default soundstreamrefernce 700 sx

hi just wondering if someone might be able to tell me what to check the two long resistors in the power supply the white ones are 10watt 1 ohm when the amp is turned on it plays fine but thoose resistors heat up almost instantly my friend told me to replace them with a lager valu is this correct if so what ones should i put in there if not what can i check to see why they heat up
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Old 29th September 2006, 06:11 PM   #2
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Those do get hot and is okay.If they get real hot to and to hot were the solder is flowing you have something going bad.I have 2 of those and they both get hot and they are working perfect.
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Old 30th October 2006, 01:26 PM   #3
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hi im working on the soundstream refernce 700sx and ive replaced all the outputs some were bad but i replaced them all and replaced 2 gate resistors on the amp when i turn it on the amp playys but not very loud for 700 watts and the amp starts to clip at very low volume very low gain and the 2 sandstone transistors in the power supply heat up like mad all the fets in the power supply check fine all the transistors what do i check for from this point?
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Old 30th October 2006, 03:07 PM   #4
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You say you replaced the output transistors AND 'gate' resistors. There are no 'gate' resistors in the audio section (assuming that the amp uses 'TIP' transistors). Are the gate resistors you refer to in the power supply?

Did you also replace the power supply FETs?

If the resistors you replaced are in the audio section, what were their values?

Large resistors are used when there is high power dissipation. The larger resistors have more surface area and therefore can dissipate more heat. Smaller resistors would get so hot that they'd burn out. It's normal for large resistors to run hot. As was mentioned before, unless they're so hot that they're melting the solder where they connect to the board, there's probably no reason for concern.

Do the outputs or the power supply transistors get hot?

Did you check ALL of the emitter resistors in the audio section?

If you replaced the FETs in the PS, did you check ALL of the gate resistors?
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Old 30th October 2006, 03:19 PM   #5
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i replaced the emitter resistors in the audio side no problems in the power side all the fets checked fine and so did the resistors
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