aiwa 770 mad distortion

[truckerhucker]

does anyone know the amp wattage on a 770
cause i just put new speakers in my 770 and im getting mad distortion whitch it had b4 i replaced the speakers so im trying to figure out if its the new speakers that causing the distortion or what

PS the tape deck is broken so i just stick my ipod in it with a line in that im atill working on getting to work with the tape deck slot

 

[Fatdog]

Welcome aboard, TruckerHucker!

One thing you have to watch for when replacing speakers is matching the ohm rating. It's best to get the same ohm rating, but anything close will generally be okay. If you are still having distortion with the new speakers, it could mean that something else is wrong. Perhaps a dirty volume pot. Dead capacitors. Dying amp.

I would try the volume switch first. Do you hear the same distortion when you plug in headphones?

 

[truckerhucker]

yea the ohms are the same
ill try to find my headphone adapter and check that

 

[ahardb0dy]

Welcome to the site

 

[Master Z]

Do you know if it has a line in or a phono in? Does it distort when you play the radio?
I ask because you said it was distorting prior to replacing the speakers and that you hook up your ipod to it.
If you hook up a line level source(like an ipod) to a phono input it will, as you described, distort like mad.
So check yo levels!
Peace,
Paul Z.

 

[Superduper]

MasterZ is correct. Some boomboxes have phono inputs which expects very low signal levels. A line-level signal inputted into a phono input will overload the phono amp and cause distortion. You can try turning the volume of your ipod way down and see if the distortion diminishes or disappears.

It also sounds like you are saying the distortion was present before the speaker swap. That alone is a pretty good indication that the speakers are not likely at fault. Did you toggle the balance controls from side to side to see if the distortion is present in both channels or just one? Distortion can be caused by lots of stuff but I'm betting that a recap of the box will restore performance if it's not a line/phono mismatch situation.

 

[jon]

most recently, my 777 has had some bad distortion. it fell on its back, and now ever since there is distortion in the phono inputs, whenever i plug a signal to them theres a strong current of distortion...!. i use the phono because my line sockets are almost dead with hardly any volume to them!
i use the 777 for DJ purposes, its hooked up with an xlr to rca cable that plugs from my mixer and turntables to the phono input of the sharp 777.. the 777 has new dayton tweeters and mids, so highs dont get overpowered by the superwoofers! anyways, to get rid of the distortion from in my phono sockets whenever theyre plugged into my my rane mixer or an ipod, i decided to change the phono rca sockets. just last night i ordered on ebay the WBT-0210Cu nextgen RCA Socket Signature Pure Copper. this upgrade costed my 110 dollars! apparently these are the newest model of rca sockets, and should be totally distortion free.. when i install them, ill have to mount and soldier them. i shouldnt have any problems mounting these new sockets into the the back of the chassis... any thoughts on changing rca sockets...? cuz i cant wait to install the new ones.

 

[monchito]

Distortion can be caused by lots of stuff but I'm betting that a recap of the box will restore performance if it's not a line/phono mismatch situation.

 

[truckerhucker]

its not a phono line in missmatch as it has a toggle set to line in not phono
also ive dealt with that issue before on home decks so i know what ur talking about.
the distortion is only when i durn the bass up like past -3 it works pretty decent at full volume with no bass at all

 

[monchito]

could be dirty pots have you cleaned any of the switches and pots?? try that just for incase

 

[Superduper]

its not a phono line in missmatch as it has a toggle set to line in not phono
also ive dealt with that issue before on home decks so i know what ur talking about.
the distortion is only when i durn the bass up like past -3 it works pretty decent at full volume with no bass at all

Still sounds like it could be a capacitor issue. It sounds like your amps are being overdriven or underpowered. Especially the large filter capacitors. Those large caps act like storage batteries and supply the punch or power overhead necessary when those hard hitting bass transients hit. If your caps are aged and has lost capacity or built up too much ESR, you won't have the power for those high current demand situations. Or if they are leaky, they could be draining power from the supply sufficiently to affect the available power to your amp.

Of course bad solder joints could show the same symptoms although you would likely see more intermittent operation or cutting out.