8 inch driver for Isobarik system with 12 drivers

[ScottG]

Originally posted by wingman
SLS 8" ?

Try it out

..good catch - hadn't seen that before.

http://www.tymphany.com/datasheet/printview.php?id=36

[Cal Weldon]

Scott, You might have a point about the build quality of the MCM. I wonder if the Xmax rating is two way?

I have the TB 740C's and find them to be a good little workhorse. It's the only one of the group I've heard, but have no hesitation in recommending it.

What does the Peerless cost?

[ScottG]

Originally posted by Cal Weldon
I wonder if the Xmax rating is two way?

I wondered about that myself..

[AKN]

I wonder if the Xmax rating is two way?

Datasheet for MCM says VC hight 24mm and gap hight 8mm so we have approx 16mm P-P or two way Xmax.

[ScottG]

Originally posted by Cal Weldon
What does the Peerless cost?

..missed that question originally.. sorry:

http://www.madisound.com/cgi-bin/ind...17753&pid=2164

[dwk123]

The TB w8-740C and the MCM driver referenced here are the two that are used in Bill Fitzmaurices small tubas, and I'm fairly certain that it was determined that the MCM xmax val was two-way. Anecdotal feedback on the two drivers was that the TB has significantly higher percieved quality, although I'm not sure on sound.

With the TB units, there is no need to go isobarik. I just threw together a sample at 4 ft^3 with 6 drivers and you can get down to about 30hz. With 6 units, you have tons of excursion to play with, although if you're looking for true 20Hz extension it may be tough.


If you have a decent EQ available, it's not even obvious that vented would be the way to go. Six of the TB's sealed in 3 ft^3 with appropriate EQ will do 105dB @20Hz, and that's before you pair them up or account for room gain.

[Patrick Bateman]

Originally posted by ScottG
This should be in the subwoofer forum.. however,

for that small a volume (even with vas halved via isobarik loading), you'll likely want something with a low vas and high excursion (..considering effectivly 6 drivers per cabinet).

From least to most expensive:

http://www.mcminone.com/product.asp?...5Fid=55%2D2421

http://www.ascendantaudio.com/assassin8specs.html

http://www.tcsounds.com/tc1000.htm

I've published a box design for the first one. I'm using two of them in my car right now. As you add additional units, the respone flattens out nicely. You could make 12 of them for about $500-$600.

http://www.carsound.com/forum/showth...2&goto=newpost

[mateo88]

Patrick, can you post plans of your finished sub? It looks very interesting.