10 replies to this topic

[Magnum9]

In a VE ute with passive splits and a floor loaded sub behind the driver's seat, will TA really make a noticeable difference in SQ, being as there is such a big difference in distance between the mids and tweeters?

[Big_Valven]

Yes, it will make a difference... although they will not time align perfectly like an active system it's not as bad as you think. It will still make a good improvement to imaging and staging.

[Winno]

I ran left vs right channel TA in my first cars and it worked really well in proportioning the stage correclty.

[KickerCat]

I believe that Sierra is using TA on his car, which is running 2 way passive, and it stages VERY nicely - one of the best MEA cars IMO

[lupin]

I'm using a mini DSP and it made a huge difference to mine. However it still cant solve all the problems. I am considering trying switching to full active to see if its any better. Failing that it will be just a good old position change.

[Big_Valven]

It's a compromise of course, like most things. If you were serious about running passive but time aligned, try and get the PLDs for tweeter and midbass on each side to be minimal. Then they're closer to being on the same delay plane, so TA will affect them more mutually.

[Magnum9]

PLD?

[lupin]

Big_Valven, on 01 February 2012 - 10:17 AM, said:

It's a compromise of course, like most things. If you were serious about running passive but time aligned, try and get the PLDs for tweeter and midbass on each side to be minimal. Then they're closer to being on the same delay plane, so TA will affect them more mutually.

Guess its easier to move a tweeter for a trial than make a switch to full active. But on the other side its less work to switch to full active on a permanent basis, as its just another cable run an a reprogram of the DSP. Moving the tweeters would require building something for them to live in. Weather that be a kick or a pillar.

[Magnum9]

When tuning do you apply TA before doing EQ or after.

[lupin]

Magnum9, on 01 February 2012 - 11:01 AM, said:

When tuning do you apply TA before doing EQ or after.

Both. Did a basic setting by ear. Did some TA, a bit more EQ a bit more TA. Now I'll bust out the RTA and start all over again

Edited by lupin, 01 February 2012 - 11:10 AM.

[Big_Valven]

Sorry. PLD = Path Length Difference. Ie. Your left midbass will be say 1.2 metres to your head, the left tweeter might be 1.6 metres to your head. You have a PLD of 0.4 metres. Trying to position speakers such that the PLD is minimal is useful active or passive. It's relative to the drivers on one side only however... ie minimise the PLD on the left, and the right sides... not necessarily PLDs between left and right.