When to use baffle step compensation?

[MethMan]

Tom, the LDC is right. I've got you had microphone 1/4" in front of the cone. Thus I think that I've written the BS did't affect measurements. Sorry for messy czenglish

The small enclosures seem to suffer the most from BS.

I think so. Specially 2way where BS always falls into midwoofer's region.

Tomáš

 

[chris ma]

bi-amping is a little tricky. First you need to compensate for impedance variation, then listen and measure to determine if BSC is needed. If BSC is needed, you will most likely have to implement it prior to bi-amp.

How do one apply BSC prior to bi-amp? Do you mean apply BSC between preamp and active crossover for all 3 inputs of low, med and high?

 

[planet10]

Originally posted by chris ma
How do one apply BSC prior to bi-amp? Do you mean apply BSC between preamp and active crossover for all 3 inputs of low, med and high?

http://www.t-linespeakers.org/tech/bafflestep/bstepcompo.html

dave

 

[soongsc]

How do one apply BSC prior to bi-amp? Do you mean apply BSC between preamp and active crossover for all 3 inputs of low, med and high?

Well, I consider active crossover part of the bi-amp (or tri-amp) just becasue that where the signal splits. So we're talking about the same thing.

 

[mr.duck]

Then can't you just make the speakers very shallow and wide, then mount them on the wall? Won't this greatly reduce the need for BSC?

 

[planet10]

Then can't you just make the speakers very shallow and wide, then mount them on the wall? Won't this greatly reduce the need for BSC?

Pretty much eliminate...

dave

 

[PeteMcK]

yep, I built 2 sets of speakers using identical drivers, one pair are 50cm wide and skinny, to go against the wall, and need no BSC; the other pair are made from 30cm pipe , baffle width 21 cm, and they defintely need BSC, even though they're hard against the wall.
Currently I'm using Rod Elliot's line level BSC, but probably will eventually put in a big inductor

 

[soongsc]

One thing to keep in mind when using BSC is that at the same volume level setting, you will have less output. So in order to obtain the same listening levels, it's probably good to check if you have sufficient Xmax to support the same listening level you are used to.

 

[mr.duck]

Pretty much eliminate...

dave

Cool, that means I'm learning

I now wonder why do most the designs I've seen, in particular the fostex bass reflex recomended enclosures, are made narrow and deep?

Being able to go crossover-less / filter-less is one of the main advantages of fullrange I thought.