DDs in a 4th Order???

[528hz 10+ year member]

Have anyone of you ever done any model of DDs in a bandpass? I'm wondering if it's a good idea or not.

The idea of them being in a sealed chamber kinda worries me...

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[Toxic Tuan 10+ year member]

I've done plenty of DD's in a bandpass. The sealed chamber in the 4th order provides acoustic suspension control. There is nothing to worry about.

Tuan

 

[Papermaker85 5,000+ posts]

the 3500 up work very nice in 6th order..

 

[Papermaker85 5,000+ posts]

the 3500 up work very nice in 6th order..

 

[Papermaker85 5,000+ posts]

3500 up 6th order.

 

[Kyle_Keating 10+ year member]

4th order bp is more or less a useless design, you should always do a 6th order unless you really are going for a very narrow pass band specialized design (but you could use EQ for the same purpose). You dont gain any SPL by sealing the front chamber (ergo converting the 4th order bass reflex box into a 4th order bandpass), you merely lose bandwidth. When you do a 6th order bp, you gain bandwidth over the 4th order bp and you gain a lot of SPL up top (higher frequency bass)

 

[rival904 10+ year member]

2500 Series LOVES 4th orders....