SB Acoustics SB65WBAC25-4 - What to do?

[chris661]

Thanks for the data and info!

I'm less concerned about lobing in the vertical plane, so long as the main listening area is covered reasonably well (+/- a few degrees vertically), but horizontal lobing is more detectable. I'm also hoping that the diminishing hearing acuity in the HF range will help to hide the transition.

Looks like some experimentation is in order.

All the best,
Chris

 

[tamra]

I made cardboard box for instantly.
This is a fun driver!
I believe that enabling make it much better.

 

[tamra]

I want to have advice for designing small vented box.
This is what I simulated on hornresp.
There is bump at bottom.I am not expecting flat response for this small driver.

 

[rabbitz]

Tuned too high. I used Vb=1.36 litres, Fb=79Hz. Also did one at 1.3 litres with a PR tuned to around 80Hz.

 

[tamra]

I recognize that f0 means ability for low frequency or speaker.
Lower than fo sounds like dead bass and higher than fo sounds living bass...
So I tuned abave 115hz.
But I am new so need opinion for tuning frequency.

 

[perceval]

A tuning of 75Hz gives the shortest spike, but still not ideal.
Hornresp gives a sharp spike, WinISD only gives a small humps of a couple of decibels. HornResp is a much newer sim package and well supported. So, I would tend to believe it.

I don't think "above" 115Hz qualifies as bass. Let's face it. A single SB65 will not give meaningful bass, even sitting very close to them.

They are best used when supported by something with more meat below. Free them around 250Hz or above that, and they will sing.

 

[tamra]

Thanks for tips.

 

[ChefChris]

Hi. Dipping my toe in here. I am curious why no one has suggested using these in a Cornu?

 

[xrk971]

It would work in a 16in x 16in x 2in Cornu I think. Bass down to 100Hz or so.