Hi I have a pioneer a-447 audio amp. The other day i turned the power off at the amp on/off button and the speakers emitted a god almiiiiiiiiiiiiighty bang. Since then the amp powers-up but no sound out. I have checked fuses and looked for any obvious signs of shorts or damage, nothing obvious. In order of probability what should i be checking and how? cheers glenn
- If you need clarification, ask it in the comment box above.
- Better answers use proper spelling and grammar.
- Provide details, support with references or personal experience.
Tell us some more! Your answer needs to include more details to help people.You can't post answers that contain an email address.Please enter a valid email address.The email address entered is already associated to an account.Login to postPlease use English characters only.
Tip: The max point reward for answering a question is 15.
Try holding the "advanced surround" and "enter" buttons and see if it turns back on. If it shuts off again, disconnect all speaker wires and try it again. If it stays on, you have a bad speaker or wire. If it still shuts down, the amp is blown and needs to be repaired.
Sounds like a bad amplifier IC.
Unhook all speakers at the back of your pioneer. turn it on and turn down the volume. If it's no longer in overload you have a bad speaker or speaker wires touching somewhere.
If its still in overload it's prlobley a amp IC and will cost between $25-$60 just for the part if you can replace it yourself.
First make sure the speaker A/B switch is on.
If still no sound, dissconect ALL speakers from the rear of amp.
Now turn on amp and listen for the relays to click in.
One relay will click when you press power. A couple of seconds later, the speaker relay will click in.
If it does, you could have blown outputs, bad speaker wiring, faulty speakers.
If it does not, the speaker relay may be faulty.
Hope this helps.
whitrashtruk, Your M-91 has a 8 ohm rated amp. Your CV's are 4 ohm speakers. When your reduce the resistance the amp see's it requires the amp to work harder and will max out at much lower volume knob levels.
Simply put, you have big speakers that require big power. You receiver is not capable of providing the big power you need and will only cause damage to your speakers and receiver.
Buy a larger dedicated amp for your speakers as you will never hear the full potential of your CV's from any receiver. Both great components; just not a good match for each other.
First thing has it a sub phono feed on the rear normally black socket if yes then go into the amp preset /the speaker set up and either the level is off or turned down thats all it can be . check the 5.1 setup pioneer amps some models dont work in dolby 2 the sub socket also use good quality cables . how old is the amp just out of interest.
Most of these older machine had speaker switches on the front panel. Can you check what they are set to. It may be that both switches(A and B) are set in, or set out. this could present the problem you are having with no sound. turn on just one switch that corresponds the connections you have made on the rear (use speaker A) Another thing to check, is when you first turn on the amp, do you hear a relay click shortly after you switch on. If you don't hear this delayed click, then there may well be a problem in the output stages of the amp. If this is the case, then you will need to take it to a tech to have a look and see what has failed in the amp. Hope this info helps, if you have any questions, I am happy to try and help you further.