My sub is slightly out of time with my speakers. Usually it's not noticeable, but when you play faster beat songs, like trance and stuff, you start to notice that the sub-bass hits are slightly slower than the rest. Just the smallest fraction of a second, but when u got beats comin in so frequently, it starts to get muddled up.

My H/U doesn't have time alignment, and neither does my front amp. My sub amp does, but i think it actually slow down the sub and not speed it up.

Other than getting a new sub, are there any ways I can get my sub to respond faster than it's doing now? It's a 12 inch sub (see sig below), and the enclosure is about 1.25 cubic feet.

i had the same issue before, i just went for dual 10" subs....

its annoying though i must admit

Any chance that 12 would suit a 1 cubic foot enclosure???? many 12's do thats why im asking

i had a look thru the manual...i don't know if it will suit a 1 cubic foot enclosure.
if it did though, would it make that much of a difference? or would the difference in my sub's response not be worth the hassles of building a new box n stuff for it?

This is usually a frequency response problem. Basically, either the sub woofer is turned up too loud, or the front speakers are not putting out enough midbass to blend properly with the subs. What are the HPF and LPF set at?

The HPF on the sub amp is set at 80

The LPF on the front amp is set at about 70.

I've got my parametric EQ setting at 50hz, with width of 0.5 and boost of 4db. (If that makes any sense?).

Have you tried swapping the phase of the subwoofer relative to the front and rear speakers?

I think you should play around with the sub level (A common problem, is people have their sub far too loud to have good SQ) as well the LPF and HPF. (lower will usually sound better, but your front speakers will be more likely to exceed their linear xmax at higher volumes)

edit - as Hutch/Cyberpunky have suggested, swapping the polarity/phase *may* help as well.

[ September 23, 2003, 05:31: Message edited by: Bassaholic ]

Sounds to me like a time delay problem. The sounds from your woofer are taking too long to reach your ear relative to the front speakers so you get that 'slow bass' feeling. Swapping the polarity of your sub or both midbasses together may help, but i doubt it.

Time alignment is your best fix. When i used TA to delay the fronts to match the sub's timing, it was so good that theres no turning back!

Other quick fixes could be to put your sub as close to you as possible. maybe try facing the sub to the front and open the ski hatch or something so your sub has a clear path to you. It might help :

Try changing Xover points. Id suggest 70 or lower for LPF and 80-90 for HPF. As hutch suggests, try chnaging phase of sub either via switch if you have one or just swapping pos and neg spkr wires on amp. It may pay to turn boos off on para too.

Just play around and see if anything helps. if everything fails then maybe TA or new sub, but try everythinelse first.

peace
Cyberpunky

If you want to delay the fronts, silicon chip magazine had a kit that could provide up to 20ms delay, it was first used in their prologic decoder and then they released it as a kit on its own.

Try contacting them

ww.siliconchip.com.au

it was the "20ms Delay For Surround Sound Decoders" in the march 1996 issue

it's a sold out issue, but you can get copies of the article

"For readers wanting articles from sold-out issues, (including those from 1987/88) we can supply photostat copies (or tear sheets)
at $8.80 per article (includes GST and p&p).
When supplying photostat articles or back copies, we automatically supply any relevant notes & errata at no extra charge."

Are the subs rear loaded, if so maybe the extra distance it has to travel causes this I didn't have this problem when forward facing but do when rear facing.

In your suggetions, do you mean turn down the gain or the bass level via the head unit?

I've tried facing it rearwards, upwards and forwards. Either way, the difference is negligible...on the fast songs it's still slow..

I'll try playing around with some of the x'overs and the phasing on the amp.

thanks for all ur responses guys..if all else fails..i'm gonna live with it. it's not noticeable on most songs..only those few really fast ones.

I'm just going to point out that you don't mean fast beats per minute, because a fast beat per minute song doesn't neccesarily mean that the attack/delay/sustain/release of the kick drum will be any faster.

[ September 23, 2003, 04:53: Message edited by: Bassaholic ]