Open baffles & baffle step

[sreten]

Originally posted by Stephen D


Wouldn't that mean that an open baffle has the same initial response roll off as a sealed enclosure? I find that hard to believe as it seems that a sealed merely looses pressure from going from 1/2 space radiation to full space, where as an open baffle has the loss from full out of phase cancellation of the combined front & rear wave to deal with. Also every equivalent comparison I've heard of unequalized open baffle vs. sealed has shown open baffle to be weaker in the bass... open back vs. seal guitar cabs as a simple comparison. What am I missing?

Baffle step causes a 6db step spread over roughly 3 octaves,
thats roughly 2dB per octave centred on the baffle frequency.
Response is flat above and below the step so maximum bass
loss due to the baffle step is 6dB.

Open baffle roll-off is 6dB per octave below the baffle frequency,
the lower you go the more bass you lose very different to BSL.

So you've misinterpreted what I thought I was saying.

And your not missing anything.

sreten.

[sreten]

5thE,

Checkout this bipolar design,

http://www.t-linespeakers.org/projects/tlB/intro.html

it does not need BSC as BS does not occur, though according
to p10 if I'm not misquoting him the designer was unaware of
BSC in normal speakers and that his design didn't have it.

sreten.

[5th element]

Hehe ye i know its not needed thx, I know baffle step and the first octave of dipole 5db drop are not synonomous but they do start at the same frequency, where the soundstarts to diffract. If that brought about any confusion that wasnt the intention.

I am perfectly clear of how it all works must not wonderful at describing it.

[Stephen D]

Originally posted by sreten


Baffle step causes a 6db step spread over roughly 3 octaves,
thats roughly 2dB per octave centred on the baffle frequency.
Response is flat above and below the step so maximum bass
loss due to the baffle step is 6dB.

Open baffle roll-off is 6dB per octave below the baffle frequency,
the lower you go the more bass you lose very different to BSL.

So you've misinterpreted what I thought I was saying.

And your not missing anything.

sreten.

Ahhh... but actually I was kinda missing a full understanding of baffle step... namely the step & the 3 octave spread..!

Thanks.