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Audio Systems/amp is on, but no sound

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Expert: Peter G. Lee - 12/8/2006


Question
I have an 800 watt Sony amp hooked up to 2 12" Kicker comp vr2's.  The system hasn't failed me yet, but today, my subs quit producing sound.  I checked the amp, no protection lights on, all wires hooked up correctly, green power light is on.  There is no sound coming from subs though.  Took out head unit to make sure rca cable for amp input were connected.  Still no sound, any advice?

Answer
Hi Jason,
One of two things spring to mind.
One; power from head unit on signal (acc)lead, check voltage there, usually the Centre of the three, (power, signal, earth). try a bridging wire from live to signal see if the amp fires up.
Second is that either the head unit is dead on the output  or the speakers are blown (straight check with ANY speaker will test this the quickest way).
Can you get your hands on a similar head unit for 5 minutes and swap over to see if that fires up the amp?

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Peter G. Lee

Expertise

Accessory installations including audio, security and lighting, general wiring and fault finding. Nothing specific to US car electrics such as ECUs or engine management systems please i.e. how do I get the radio out of a Saturn, we don't have Saturns in Europe so I wouldn't know.

Experience

11 years as a security and audio installer in the U.K. 9 years own company in South West of U.K. installing for a number of high street retailers incluing Trinity in-car centre, Road User, Halfords and A.1. Past advisor to and chairman of Sold Secure initative gloucestershire police. member PACT (partnership against car theft)U.K. police, Kit car builder VW air coole

Organizations
Member of the institute of diagnostic engineers M.I.Diag.E

Education/Credentials
Certified by Clifford, Cobra (U.K.) Serpi Star-Gamel, Moss, Philips, Tracker (Lowjack), Pioneer blue chip installer, Kenwood installer. City and Guilds, A.R.E

Past/Present clients
Over 2,000 between 1988 and 2000

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