Stock amplifier with new stereo

[TheAvo]

I'm installing a new stereo and the local stereo shop I bought the wiring harness from told me that unless I bypass the stock amplifier i'd blow the new stereo.
This does not make sense to me as the power would be coming from the stereo head, into the Amp, then to the speakers. Plus, what would be different from the stock Amp and a new one?

Has anybody used an aftermarket stereo with the stock Amp?

I've seen several questions regarding stereo replacement so i'm taking pictures and attempting to document all the caveats to write an article.

I'm using a wiring harness from "Metra," part number 70-5511.

Thanks, Tony

 

[pughman]

your speakers will not work with the stock speaker wires, unless you hook up the stock amp. i put my new stereo in, not hooking up the stock amp, and nuthing, then hook'd up the stock amp, and bam music ! been like that for 3 years now....


one other thing , this is the wrong place for this....
http://www.explorerforum.com/forums/forumdisplay.php?f=9

 

[Arthur]

the stock amp distorts the signal from an after market head unit... bypass the entire stock amp and run speaker wires directly from the head unit... check out my stereo set up on my cardomain

 

[bikeboarder]

that IS BS i have a 55X4 aftermarcut deck with the stock amp and it sounds great. When i got mine i went to car toys and they told me to bypass it. so i said thought "screw that" so i went to best buy and they slod me a adapter so i could keep the stock amp. i have had it like that sence june of 06 and i blast the **** out of it, i did blow the fuse once and that gave me a scare but other then that I havent had a problem

 

[pughman]

that IS BS i have a 55X4 aftermarcut deck with the stock amp and it sounds great.

mine sounds clean and loud also, i should say right before i got it, the guy went to best buy and got a new alpine cd player and 4 new alpine 4x6's in all the doors, when i got it the alpine cd player would not play my pc made cd's so i went out to wal mart and got my cd player i have now, when i instaled it, i did not hook up the amp + from the cd player to the plug best buy put in, and no sound came through the 4x6's. when i hook'd up the + wire, it started to work, and wook good....

 

[Arthur]

i didnt noticed that the factory amp distorted the sound until I installed the tweeters... they projected the static so i bypassed the factory amp and it sounds perfect... ive had way too much experience with car stereo to be told that what i say is bs... i stand by what i said and take it from somebody who tried both routes not someone who is defending the only route that they tried

and i forgot to mention that most aftermarket head units will have a more powerful amp than the factory amp

 

[glum]

the real deal

the stock amp distorts the signal from an after market head unit... bypass the entire stock amp and run speaker wires directly from the head unit... check out my stereo set up on my cardomain

ok after reading all the posts about by passing the stock amp I hope to make it clear the head units that are most comon have mutpel outputs the single color coded wires have high power output ie25-50wats the RCA type plug cabels are genraly line out averable from somany millavolts to 2-4 wats verrys by volume these are the answer to the the destortion . the high curant can not be used to signal the amp.the line level has to be used.You can eather sodier the stock amp wires to a set of RCA cabels and plug it in or look for a head unit that only putsout 4w max I went with a kenwood that has only 4w max. the stock woffer is just that a woffer not a sub just becous its an individual speaker it may be lowpas but its a wide range not in the subsonic range U DONOT HAVE TO BY PASS YOUR WOFFER AMP JUST WIRE IT TO LINE LEVEL OUTPUT OR BUY A QUALITY HEADUNIT THAT DOESNT HAVE A HIGH LEVEL OUT PUT I have the stock JBL amps I instaled a kicker10in in the stock housing 2 one and a half inch ports and a good passive chok coil(subwoffer crossover). and as far as sound quality Il smoke any bestbuy mutpal12in junk. DONT GET YOUR ADVICE AT BESTBUY buy there stuf if its cheaper buy go to aadult for advice small highend shops the converters work without sodering but there is no need to bypass the woffer please excuse the spelling but i think i made it clear?

 

[bikeboarder]

you made it clear. You seem to know your stuff. do you know the wattage/ohm rateing of the JBL amp? right now i have a sony Xplode 12 in its own box with some longer speaker wires, it pounds. i am just wondering. thanks in advance

 

[glum]

4ohm 65 per chanel to the full range in the front and iv seen 85 and 90 for the wof not shure witch is right but not from ford so im not shure its exact have fun