for some reason, I want TWO!

[Bent]

Greetings again.
I thought I'd dare ask, what 15 inch driver is available in a dual VC version with the nominal impedance (per VC) = 4 ohms?

I can't seem to get it out of my head that 2 tempests in a tall slender sealed box (ok, as slender as a 15" driver will allow) would work well to provide effortless (and cost effective) bass,and with the two drivers being "essentially" co-located, I'd have no phasing issues between the two drivers - and be an interesting conversation peice as well... 'cept the Tempest is a dual 8 ohm unit... there is no way to wire all four voice coils to allow a final combined impedance of 4 ohms - so I'm wondering if there is a driver like the Tempest, but in daul 4 ohm variety???

(this all started with me thinking I'd best utilize the power of a typical plate amp that works well driving a 4 ohm load... am I way out to lunch here?)

Thanks

[Andrew Pratt]

There's no reason why you have to use both VC's. The tempest will run just fine off one VC per driver allowing you to keep the final resistance to 4 ohms. all four of my tempests in the IB are running on one VC for this very reason...QTC changes a little and power handeling drops in half but that won't be an issue with a plate amp.

[ThomasW]

Any reason you can't use a pair of SVC 8 ohm drivers wired in series?

[Bent]

Thomas... are you sure of what you said... 2 SVC's in series (to equal 16 ohms???). :E

In all seriousness, I would try two 8 ohm units in Paralllel, but I can't think of a manufacturer I'd like to support that is as cost effective as our friends at Adire. Any recomendations? I would have no trouble with a classy looknig box that stands 36" tall.

[Andrew Pratt]

oops never mind.

[ThomasW]

Oops ... yes parallel. Aalzheimers moments are sooo embarressing .... :W

[Andrew Pratt]

Thomas time to put away those aluminum pots :W

Any comment on why he can't just use one VC?

[Bent]

I guess I could experiment with a dual variable potentiometer to vary the Qes parameters of the system, but I'd have no idea what to look for....(sound quality, that is).

[ThomasW]

It's too late Andrew ...................... :rollhead:

Of course he can. I think it's a bummer to lose the output (-3dB for each driver) by leaving one VC open.

[Hank]

"Oklahoma, Oklahoma, Okla, Okla, Okla - homa!"
-Ruprechkt

[Bent]

"Oklahoma, Oklahoma, Okla, Okla, Okla - homa!"

???? :B

[Hank]

From Steve Martin's temporary character within the movie, "Dirty Rotten Scoundrels" A funny movie. :T

[taz13]

Just have to have two!

If you have the number two in mind then just make two towers and drive them from one plate amp and all voice coils are in cct. parallel vcs and series drivers with the towers in parallel, might sound nice.

[Bam!]

From Steve Martin in "Dirty Rotten Scoundrels" A funny movie.

Even with the explanation...I am still :blink: :blink: :blink:

:lol:

[Pat]

Hank, I "get it" :rofl:
No worries

The other guys obviously haven't seen the movie

Ben, are you stuck using the plate amp or is there a possibilty of just using a 2 channel amp.
I am using an old yamaha 2 ch. amp to power my 2 shivas.
The dual 8 ohm vc's are wired in parallel on each driver, so I have a 4 ohm load on each channel. The amp puts out around 230w @ 4ohms and I have never been lacking for output.

Just tossing out another idea...

[Bent]

no real affliction with the plate amp, I just thought it might make it a bit more desirable when "re-sale" time comes around.

seems I need a new remote control first... sigh.

[Andrew Pratt]

Ben I'd go for the seperate amp as well..much easier to work with and you'll own the amp for several subs if you get a decent one now.

[Bent]

SOlD, I just recently saw a bigger (600 w/ch Carver 2 channel on some local B&S) amp for about 300 bucks.

[Pat]

Congrats on the new amp!

[Andrew Pratt]

Damn that's a great find...and local too! At least now you won't have to worry about powering your future DIY subs...well unless you go nuts and buy a couple of tumults and try to LT them into a shoebox

[Bent]

I can't find the ad anymore... I don't know if he had a buyer, so I'll put in a WTB and see if he notices it.