300-794 power question.

[bobg]

I am finally getting around to building a sub using the PE 300-794 amp I purchased several years ago. My driver is an ACI DV12 which is a dual voice coil unit that is stamped 6 and 6.3 ohms. The question is, is this amp capable of driving this driver if I hook the coils up in parallel? Or should I just use one coil, knowing that the sensitivity will be reduced? The sub design is the Titan II, which is sealed and has a volume of 1.9 cu ft.
Thanks for any advice.
Bob

[philiparcario]

> I am finally getting around to building a
> sub using the PE 300-794 amp I purchased
> several years ago. My driver is an ACI DV12
> which is a dual voice coil unit that is
> stamped 6 and 6.3 ohms. The question is, is
> this amp capable of driving this driver if I
> hook the coils up in parallel? Or should I
> just use one coil, knowing that the
> sensitivity will be reduced? The sub design
> is the Titan II, which is sealed and has a
> volume of 1.9 cu ft.
> Thanks for any advice.
> Bob
it wont drive the unit in parallel. you can run the unit in parallel if you add a 2ohm 100watt resistor or you can run it in series or you can run 1 voice coil

[Wolf]

> it wont drive the unit in parallel. you can
> run the unit in parallel if you add a 2ohm
> 100watt resistor or you can run it in series
> or you can run 1 voice coil

If it's DCR, then it should be doable in parallel.
Later,
Wolf

[Brent_S]

I'm pretty sure all generations of the DV12 were rated 8 ohm nominal per coil, so parallel should present a 4 ohm *nominal* load to the amp.

Personal experience. I ran a DVC12 per channel, each driver's coils in parallel, using a Yamaha DPL receiver with no problems.

-Brent


(Originally posted by: Brent S)

[bobg]

Your message backs up something I just read that compares the "nominal" impedance to the actual DC resistance one would read on a meter. I just hooked the coils up in parallel and measured the resistance and it comes out at 3.3 ohms which is close enough to 4 ohms for me. Based on that and your personal experience, I'm going to run the coils in parallel.

I'm also going to keep the two resistors in the amp that effect boost at their stock values so there will be no boost, and that should also help to keep the amp from frying itself.

Thanks for all the help!
Bob

[Jeff B.]

> Your message backs up something I just read
> that compares the "nominal"
> impedance to the actual DC resistance one
> would read on a meter. I just hooked the
> coils up in parallel and measured the
> resistance and it comes out at 3.3 ohms
> which is close enough to 4 ohms for me.
> Based on that and your personal experience,
> I'm going to run the coils in parallel.

> I'm also going to keep the two resistors in
> the amp that effect boost at their stock
> values so there will be no boost, and that
> should also help to keep the amp from frying
> itself.

> Thanks for all the help!
> Bob

I ran a pair of DV12's for years with the coild in parallel. It is a typical 4 ohm nonimal driver that way, and it is pretty easy for most amps to drive.

By the way, since it was mentioned above, don't put a 2 ohm resistor in series with a woofer it destroys the elecrical damping and draws a lot of power from the amp too.

[bobg]

Thanks for the advice. I've read a couple of articles about using resistors since that other post was made, and I agree it would cause more problems than it would solve.

I'm hoping to have this thing up and running by next week.
Bob