How to deal with high QTC?

[sreten]

Originally Posted by head_unit

It may kinda work, but it can't REALLY work.
You might as well EQ the in-room response.

Hi,

Nothing "really" works exactly as the theory suggests, that why its theory.
That doesn't mean though that it won't work well if you do it. SL specifically
goes for a very low new Q (around 0.5) when he implements his versions of
LT'd subwoofers, and there no reason it won't work as well as any other
powered EQ'd (and compressed / limited) subwoofer out there.

In fact the problem for amateur sub builds is the general lack of adaptive
power / excursion management built into some commercial subwoofers.

Personally here I'd go for a peaking 2nd order high pass filter, with some
ripple, such that it levels off the mild peak around 100Hz and boosts
the lower bass, and then stops the driver being overdriven for low bass,
so it would have to be 3rd order, for an eventual 5th order roll-off.

rgds, sreten.

[head_unit]

Ha ha, that's very true, especially for speakers.

What I meant more exactly was that the time response won't be compensated as theory suggests, so you might as well just focus on the amplitude domain and EQ the room.

Hmmm, it's making me wonder what does happen to the time response-it's been a loooooong time since I looked at that.

Anyway, if the boxes are too boomy, my gut feeling is it should not be so much, and some judicious EQ should pretty much fix it.

[soren5]

Thanks for all the advice. I'll try with the small boxes and add some of this filling. Then I'll do some in-room EQ with the miniDSP and hope to get some good results
I'll let you know how it all works out.
Thanks again

[sreten]

Originally Posted by head_unit

Ha ha, that's very true, especially for speakers.

What I meant more exactly was that the time response won't be compensated as theory suggests, so you might as well just focus
on the amplitude domain and EQ the room.

Hmmm, it's making me wonder what does happen to the time response-it's been a loooooong time since I looked at that.

Anyway, if the boxes are too boomy, my gut feeling is it should not be so much, and some judicious EQ should pretty much fix it.

Hi,

The time response and frequency response are completely interchangeable,
one determines the other and vice versa. So yes concentrate on the
ampltude domain, make that smooth and the time domain will follow.

rgds, sreten.

[Ron E]

Originally Posted by soren5

Thanks for all the advice. I'll try with the small boxes and add some of this filling. Then I'll do some in-room EQ with the miniDSP and hope to get some good results
I'll let you know how it all works out.
Thanks again

You could try an amp with negative output impedance...
Otherwise Linkwitz transform is probably the easiest solution.
Aperiodic enclosures basically just act like a notch filter, so you throw away output. Since you have miniDSP, you are all set for EQ.

[muddasirwaheedmalik]

Pallas . seems interesting u seem to have good idea. are u a hobbyist ? where are u from ?was just wondering