Not sure if i have had a result or not! recently an old boy locally got a scrappage deal on a beat up 98 VW passat. It had a rather pokey Kenwood hi fi system in it.

I did a couple of hours work on his boat & he gave me most of the system.

Here is what i have. KDC 4590 tuner/cd player, Kac PS300T amp, Kac PS400m mono amp, power junction box . 2 large sub woofers.

The bloke wasnt too careful & didnt bother to strip out the tweeters, front speakers or cables just cropped them off before the car went for scrap.

Now for the fun bit, I have a 98 1300mpi Felicia that has done 57 thousand miles it is a runaround and looks rather tatty, underneath though its a great little car.

Now it occurs to me that to fit the lot would be exceedingly silly & require bigger alternator battery etc & i cant be bothered to do all that.

But would it be possible to just use the tuner cd & thePS 300 amp? be a shame to not use it!

Any ideas welcome.

Does matter about the state of the car, but how much time you spend in it, and how much you like having a decent stero

You could put 2x amps into any vehicle. Fair enough, if you run the stero from startup to engine turn-off, every trip, and those trips are short trips, or drain the battery after a while.

You can get round this by charging the battery every now and again.

If I where fitting the kit you've got, I'd use the PS300T (2x 75w RMS @ 4ohms) to run both front and rear full range speakers (thus removing the ability to balance front/rear sound volumes, but gaining amplified sound in both front and rear), and run either one or two of the subs from the PS400M (1x 200w RMS @ 4ohms or 1x 400w RMS @ 2 ohms (I'm guessing the subs are 4ohms ones)).

Sound deaded the car heavily

Don't waste money on brown bread and all that fancy cr*p, just get some lead roof flushing and use a heat gun to melt sections onto the insides of any and all metal sheetwork sections

Just checked the two Subs & they are Kfc ws252's 450 watt max each. I presume the ps 400 amp was used to drive them.

The next question will probably sound really stupid but does the amp have to be mounted flat or can it be mounted on its side? reason is i use the car to carry stuff so cant afford to lose too much space!

Never had any problems mounting amps on their side, they even work upside down no problems aswell (though some might over heat). There's no moving parts inside one so it should be fine.

... Kfc ws252's ...

Yep, the PS400M is specifically a sub amplifier, hence the in-built low pass crossover (to cut out high and mid range frequencies).

From what I can find, the KFC WS252 are 10" 4ohm subs. Given that, I'd use only 1 sub with that amp

2x 200w RMS @ 4ohms = 400w @ 4ohms, the amp is rated at 200w @ 4ohms - so you could overload the amp with both subs turned up.

Sound quality wouldn't be as tight eigher.

ps. I'm assuming the RMS value of the subs at 200w RMS (RMS being the 'average' volume value rather than the peak value - the RMS is the more reliable indicator of power output).

If you've got no idea what I'm on about with ohms (restistance) - basically the lower the ohms value, the more power the speaker can handle.

You can mount those amps pretty much anywhere ( as long as its dry and big enough the heat the amp will produce )

The boot in cars normally ends up being the easiest to use, but I've stuck stuff in all kinds of random places

Edited 10 November, 201015 yr by snow_muncher

I have fitted the head unit & it all works fine, at the moment its on its own driving the cars standard speakers from its last cheapo system that was in it when i got it.

Looks like i am going to use just the ps300 with a pair of 6"x9"s in the boot & a pair of 5" ones in the front, there are some good deals on mtx speakers & that should get it running ok. i dont need any more power than that for my 49 year old ears!

The old subs are damaged so are scrap.

All this in a car with the scabbiest paint job in Essex it really just has to be done!

Yep, the PS400M is specifically a sub amplifier, hence the in-built low pass crossover (to cut out high and mid range frequencies).

From what I can find, the KFC WS252 are 10" 4ohm subs. Given that, I'd use only 1 sub with that amp

2x 200w RMS @ 4ohms = 400w @ 4ohms, the amp is rated at 200w @ 4ohms - so you could overload the amp with both subs turned up.

Sound quality wouldn't be as tight eigher.

ps. I'm assuming the RMS value of the subs at 200w RMS (RMS being the 'average' volume value rather than the peak value - the RMS is the more reliable indicator of power output).

If you've got no idea what I'm on about with ohms (restistance) - basically the lower the ohms value, the more power the speaker can handle.

You can mount those amps pretty much anywhere ( as long as its dry and big enough the heat the amp will produce )

The boot in cars normally ends up being the easiest to use, but I've stuck stuff in all kinds of random places

2 things dude

You cant overload an amp with subs that are rated higher than the amp your using - the subs just do what the amp tells them - both subs will be fine running from the one amp - wire one sub per channel and your running 2 subs at 200wrms each (assuming its a 2x200wrms amp)

and ohms is a measure of the impedance of the coils in the sub - it in no way reflects how much power the sub can handle. - some subs have dual coils that allow the sub to be wired into different configurations depending on the amp you have to drive them (for instance a sub with dual 2 ohm coils can be wired to show and amp a 1 ohm load with the coils in parallel and 4 ohm load with the coils in series)