I have a 10" sub in the back of my XB where the 'luggage compartment' used to be (holy cow, are japanese suitcases that small?).

I'm in the front of my car.

My 9833 has time correction... has anyone used time correction to correct for the distance between driver and subwoofer? I've only heard of people using it to correct for a person being on one side of the car, etc. It seems like it'd work.. any reason I wouldn't wnat to do it? (for instance, sound travels faster through metal than air...and a car is metal...)

 

unless the sub is rediculously far away from you, there shouldn't be any need for it

 

Ya, usually they are like millisecond adjustments. My home stereo receiver has the same thing for the rear channel. But in something like a car, even the box, you won't notice it.

 

It's the sound... The sub tends to kick a few milliseconds late and I think its more about sub response time in terms of what the sub has to actually do to make its sound.

I have a single 12' sub in the back and the sound comming from it was delayed to the point where if you have the ear to notice it, it sounded bad. So what I did to correct the problem some-what was to reverse the polarity going to the sub. It sounds better (but not prefect) now.

When you think about it, what you really need is some device that delays sound going to the amps that produce the mids and hi's.

Glenn

 

well.....look at the Japanese in comparison to Americans......

I'll bet you didn't turn your xB upside down and shake it before you bought it either..did you??? I did with my tC and 3 of them came out!!!!hehehe.....

 

it wouldn't hurt to use the time correction.

 

I wasn't talking about delaying the sub... the delay is on all channels BUT the sub (my HU has a subwoofer out, which is what I wired up to.. I wanted to use the crossover on the deck so I don't have to crawl around behind th passenger seat to adjust the sound).

Just to clarify for aynone else reading So don't delay the sub, but delay the speakers so they are as 'far away' as the sub is...

 

I'm not sure what sound issue you are trying to correct. Inside the xB, the speakers, no mater where they are mounted couldn't be far enough away from each other to make a difference that your faders couldn't correct...

Now if we are talking about a home-theater systems where there is real space between speakers, time delay circuitry could make a difference.

What I was talking about was the sound delay or response times of mid&hi range speakers vs subwoofers. The music is kicking everywhere but the subs are kicking a little late. The cause of this could be any number of things. For example, like in my case, I was using an Alpine 4-ch amp to drive mids and tweaters, and an MA Audio amp to drive my sub.

I had a theory (which was wrong) that the sub amp amplified music at a different rate (slower) than my mid+tweater amp. What was actually the case was the internal polarity of the sub amp was 180 deg out of phase with my other amp so I switch the polarity of the sub.

But there is still the issue of response time of say a 6.5' mid vs a 12' sub with a 200oz maginet on it. The sub is just going to be slower.

Glenn

 

FYI, here is a little write-up I did on Alpine Time Correction.

https://www.scionlife.com/forums/viewtopic.php?t=55441