Can anyone who has built the SO Imperial recommend a 15 inch driver apart from the Dayton.

If I buy it from PartsExpress it costs $89, but shipping will put me back $149  :'(

Thanks,

Simon

Alternate drivers should be chosen based on how well they work in a 4 cubic foot sealed enclosure (believe it or not).  Choose low FS as Dan said, and look for the best efficiency.  You can download a speaker program from somewhere and model different woofers in a 2nd order (sealed) box to find the best match.

Steve


ADDED NOTE:  The driver does not know it's in a horn.  The impedance plot will reflect a true sealed box.  Think of the horn as a parallel resonator.  The horn does not effect the driver, as was the point behind it's design.  This way, unlike the original Imperial, sound from other speakers in the room will not activate the horn and create unwanted bass.

How about these from Peerless.

Good price (I think, the website I found them on quotes 2 prices with a $200 difference!!). Specs in the right range.

The only doubt I have is that they are long throw woofers.  Is that a disadvantage?  Do the cones in the Imperial need to move much?

I notice I forgot to post the link from my previous post.  Oops.

It doesn't matter, I've found a different Peerless driver that I can get my hands on.  The 830500.

Fs   = 18.1 Hz
Vas = 139.2 L  (4.92 cu Ft)
Qts  = 0.2
Sens = 90.6 dB

About spot on for what was recommended.

Does anyone know which driver is THE driver for the Imperial S.O.?

Hi djn,

I barely found any Info about the driver. Do you know a reliable source where you can order it? What are the costs?


Kindest Regards,
Wolfgang

Hi everyone,
The Series II Driver is the recomended driver for the Imperial S.O.
Did anyone build the Imperial S.O. with the Dayton Classics?

http://www.parts-express.com/pe/showdetl.cfm?Partnumber=295-325 (Does anyone know a place where you can buy them without paying 90$ for shipment?)

It's got lower X-Max and goes up to 3 db louder even in the low regions. Would this one be better or at least work as good as the Series II?

Thank you,

Yes, bu shipment for switzerland is very expensive. Do you know a cheaper site?

Thank you,

Hi everyone!

I have recently bought the 18" Mivoc AWX 184 and have built it in a Corner Horn. Unfortunately it doesn't produce any low bass and I am very disappointed. Is it possible to build my Mivoc into the Imperial Horn? If necessary I would also resize the Box.
Any advice would be greatly apprechiated!
Thanks a lot!

Regards,
Wolfgang