This maybe in the wrong topic area but...... After fitting subs and amp to my car after serious lack of bass was very very happy with a crisp sound with nice smooth bass. Don't know what's gone on but me stereo still works but it seems i've blown the bass out of the unit so it could be perfect excuse for a new one or there maybe something i can do???? Anyone ever heard of a headunit doing this??? cheers
on my kenwood doesn't seem to be separate for the subs and car speakers so when i have the stereo turned up i can't seperate the rear speakers from the subs. I think i've blown the amp in the unit because i've got treble and mid but no bass and the bass that is coming out of the sub is distortied, the only way i can describe it is the bass is there but lost it's ooomph. before this happened it used to make my hair tingle now it's just a flat bass. cheers for any help.
Have you checked the amp powering the sub ? the headunit amp would not power the sub all it does is send the signal to the amp powering the sub. Edited by: [RS]VeeDub
It sounds like it was working fine so unless your changed the wires over it would'nt be out of phase. Sounds to me as though you've blown your amp that powers the sub or you have a faulty connection.
lol I almost missed it too thats why I had to edit. My dads blown his amp before, luckily only the mono setting had blown so I managed to salvage it from the bin and use it to power my 6x9's on stereo setting ! cant beat a free amp !
1 sub wont go out of phase with some speakers.. they wouldn't produce the right frequencies to cancel them out. Sounds like an amp problem..
before i start the headunit that were talking about is quite a crap kenwood i think it's only got one output and isn't even cd changer compatible it says it 45w per channel on it. i thought it could have been the amp at first but there is bass coming out of the subs it's hard to explain it worked for a few days and the bass was smooth where as now it seems punchy still loud but not smooth the reason i think it's the head unit is before i put the subs and amp in the unit was running uprated kenwood speakers cerwin tweeters all in there standard holes which makes it two in dash, two in front doors and two at rear with tweeters for the rear all running off the headunit which came with the car. whenever it was turned up to about 25 it would play for quite a while then the bass would fade out on all the speakers and just mid and high would play, the headunit was getting really hot too when the cd was ejected it was v hot as well which made me think it was struggling with the amount running off it as when i turned it down or off for a little while the bass would return. I've wired amps before and just plugged in the phono leads as normal and it sounded the nuts, i made sure i turned the bass right down from +4/5 on what i thought was all the speakers with the sub fitted turned it down to -2 and then faded more to the rear to counter the sub against the fronts so i could then turn it up to 30 and it was fine. where i've plugged the amp leads in it says rear above it i don't remember my last kenwood having that it just said av. so that explained why the fader for the rear on the headunit was doing the rear tweeters and speakers as well as the sub. The reason i don't think it's the amp for the sub is that now when i put the fader all the way to the front there's mid and treble but no bass coming out of the speakers at all. Is it possible that because i've blown the bass part of the unit it still seems to be sending a signal through to the amp because it still plays and can be turned up but it just doesn't sound right. I think the rear speakers were still conected basically in the same way as before but where i've turned the headunit up thinking with less bass it's under less strain it wasn't at all, i reckon i've cooked it sorry for the long explaination but need to get it sorted before i go and spend 350 on a new one when it's something else
Not 100% sure on what and how you have connected up. It's very unlikley you have damaged 'just the bass' part of the head unit as it's all one signal sent out by your amp. Your EQ, fader etc is a pre-amp section so you would have all or nothing. How many speakers do you have on each speaker out? If you have more than 1 speaker connected to each terminal you will have changed the impedance and that will damage the head unit amp. Is the external amp and sub connected to an Auxillary out? Have you tried the sub with a different amp (one you know to be good?) Have you got a Lo Pass filter set on the sub?
tub this is the thing when i've looked at the back of the unit it says rear not aux out. it has a low pass filter which was switched on i'm running standard wiring as in one sub for each channel no bridging or anything and the gain was only set at half. i really couldn't tell you how it wired but i have bass mid and treble adjustment levels on the headunit which my last one never had which makes me think it's wired right.
Get a multi-meter on the 'rear out' phonos. Put a prong on each of the faces (the + and - of the phono) and this should read around 0.775v (or minus 0.775v if you are the wrong way around) this is 0dB or Line Level... which is what your sub pre out should be. Also, try checking another amp and anothe sub.. see what chages.
i'm 99% sure the subs are fine the amp is 200 watts per channel and the subs are 360 each so i really don't think it's them as why has my bass dissapeared when i switch to front speakers? the main reason i think ithe unit is wired correctly is that the headunit and speakers were fitted at a shop and it doesn't explain what was going on with the headunit before the subs where the bass was cutting out?? i never had trouble with this setup in my last car and that had a kenwood also just can't remeber whether it said rear or aux out where it plugged in, do you know what the norm is rear or aux??? cheers for your help tub much appreiciated
tis a kdc 3090r i know it's basic model which is why i think it can't cop with what i've wired to it cos i'm puzzled as to why it's got rear above the outputs and not aux out maybe i shoudn't have wired the amp leads out of this port and i've f**ked the stereo some how.
Just leaving Uni now, so wont be back on my PC till later on... i'll have a think and see what i come up with when i get in from work.
cheers tub i rang a shop up and asked him and he reckoned the head unit is buggered before this amp and subs thing came about i had trouble with the unit before where it was losing all it's bass because it couldn't cope with the amount of speakers the golf's come with. i need a unit where i can control/seperate the sub and car's rear and front individually as the other one never had that it just has front and rear that's it obviously if you think it's something else please let me know these are the headunit's i'm looking at now to replace me current one what do ya reckon?? kdc 7024 is first option depending on funds otherwise kdc 5024 cheers stu
