Hi,

First of all - the gory details. Here is my current system (in a 1998
Honda Prelude):

Alpine 7394 Head Uint
Alpine R-Type 5-1/4 inch front splits
Alpine 6x9 rear (nothing fancy, just for rear fill)
Alpine 55x4 RMS 4 channel amp (last 2 channels are brideged for the
subs)
2 10" MBQuartz sub woofers - running in parallel

My problem, as you may have guessed, is lag from the subwoofers. I
used to have a single 12" Alpine Type-S sub but it annoyed me so much
that I went back to the installer and tried some other options. The 2
10" gave the best sound, but I still get some lag. To me, this seems
like more of an installation/setup issue than equipment, since I
assume a 10" sub shouldnt be laggy. Since the majority of the music I
listen to is techno, this can get very annoying!

I have the sub box facing away from the front (ie backwards) and have
the crossover on the amp set to 90hz - any higher and the bass gets
very boomy and muddy. I cant think of anything else to try.. has
anyone got ideas on how to reduce the lag? My deck has time correction
- I am planning on delaying the signal to every speaker by a couple of
milliseconds in the hope that the subwoofer channel is independent of
the time correction. If that doesnt work, what will?

Regards,
Steve

bassfreak wrote:
im tringto fingure out ur "lag" conception. expalin excatly waht the
problem is/ is the highbass/lowmid range not blening, is bottom end not
loud enough? or is it the the subwoofers wont keep up with faster paced
beats?

It's just what it sounds like. Subwoofers are typically in the trunk,
which means it's a few millisecond before their sound reaches the front
of the cabin. Your mids and highs are up front. The result is that the
bass is delayed, and the sound is muddied. The answer is to either
locate your subwoofers up front (See Earl Zausmer), or delay your front
speakers a few milliseconds.

Just wondering, but it is possible for you people posting from
caraudioforum.com to please quote? It's usenet protocol, and it's common
courtesy. These threads get thick, and if you don't quote, nobody knows
what you're talking about.


--
Lizard

teamROCS #007 / Technical Director / Founding Member *res derelicta*
http://www.teamrocs.com/
Save Farscape http://www.watchfarscape.com

Scott Johnson wrote:

I doubt you could hear the few 100ths of a second delay from the short
distance between the speakers. although, if you wanted, you could possibly
use a delay circuit on the front speaker amplifier.

You can hear it if you know what you're looking for. However, most
people never notice. A ms is far too short for the average listeners
nervous system to respond, and the human aural faculties are adept at
processing input before it reaches our concious mind. If it didn't, you
couldn't tune out annoying sounds!

However, if you know what to look for, you'll notice it. People can be
coached to recognize delay (but then, people can be coached to perceive
things that aren't there, as well).

It's all academic though. 98% of listeners out there don't notice it,
and 1% are lying when they do.

--
Lizard

teamROCS #007 / Technical Director / Founding Member *res derelicta*
http://www.teamrocs.com/
Save Farscape http://www.watchfarscape.com