hey everyone a while ago i put a new HU in my car. I already had the sub put in my car with the old HU and which i'm assuming they tuned to that HU.
my question is do i need to do things to tune the sub/amp/speakers again because of a new HU?

I know how to put the things in but not much in terms of tuning, thanks.

Always best to tune a new head unit to suit your listening style... It can't tell what your previous head unit's setup was, and it will have different specifications and possibly added tuning features. Easy to do, I tuned a mate's system 5 minutes ago in my work carpark, easy :)

if your amps arent properly adjusted to suit the new head unit you could cause some harm if you dont know the limits of the new unit, and what voltage it puts out in relation to the old unit.

DEFINENTLY get the gains adjusted accordingly.

Other than that, equaliser, time alignment and other features that may be available on the new unit you should just play around with, and keep playing until you find a setting that sound good to you :D good luck!


Always best to tune a new head unit to suit your listening style... It can't tell what your previous head unit's setup was, and it will have different specifications and possibly added tuning features. Easy to do, I tuned a mate's system 5 minutes ago in my work carpark, easy :)

i couldnt even begin to tune the first feature of a sound system to a semi satisfactory level within 5 minutes :P

i couldnt even begin to tune the first feature of a sound system to a semi satisfactory level within 5 minutes :P
Yeah it didn't take me 5 minutes mate, i meant that i finished doing it 5 minutes ago :)

Im with Woob

gains need to be adjusted cos your new headunit may have a different pre-out voltage

yea i know how to change things on the hu itself but im pretty clueless about stuff at the amp or whatever

thanks guys

well, if you feel that you need some help then i would be cautious about playing with it, last thing that you want to do it clip the sub. i would just play it safe and turn the gains down, will be a knob or a screw or something. then see if you can find someone locally who know this stuff who can come round and help you and show you how to do it

definitely

my old head unit had pre-outs of barely 1v

the new one is 5v.... obviously the different in volume is MASSIVE, which is also the difference between having a safe amp gain level, and one that will fry your speakers

I just changed subs... Even then it now needs a retune. Sounds pimp though ;)

definitely

my old head unit had pre-outs of barely 1v

the new one is 5v.... obviously the different in volume is MASSIVE, which is also the difference between having a safe amp gain level, and one that will fry your speakers

Thats weird, when I was getting my sub tuned, the bloke said that lower preout voltage is better. I thought it was strange, but didn't really take it as gospel.

flatshift, there really isnt anything special between a 1V preout and a 5V preout. This is what amps have a gain knob for, to compensate for lesser voltage being fed to the amp :)

the big advantage that a higher voltage has over a lower voltage deck is that you can push it further before you need a line driver over multiple amps!

With proper tuning the higher voltage outputs will also be less likely to induce noise which in turn means better SQ. If there was not advantage to higher output voltage, then why do they bother adding it?

Thats weird, when I was getting my sub tuned, the bloke said that lower preout voltage is better. I thought it was strange, but didn't really take it as gospel.

Whoever he is, never take his advice again....