Today's Message Index:
----------------------
1. 09:00 AM - Re: I'm Out, first dibs (Scott Walters)
2. 09:50 AM - Re: I'm Out, first dibs (NOTGSXR@aol.com)
3. 09:53 AM - Mackie Studio Monitor HR824 8" drivers? (NOTGSXR@aol.com)
4. 02:12 PM - Re: I'm Out, first dibs (Scott Walters)
Message 1
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| Subject: | Re: I'm Out, first dibs |
--> XDP4000X-List message posted by: Scott Walters <scott@packetpushers.com>
> I'll take the PQ20 :) I could always use a Third ;)
hey, I hear ya. Hey do you run any of your PQ20's bridged?
If you do, what are you driving, and have you ever had any issues?
I also have a PQ10 (4x40) and am considering in my new install bridging
the PQ20 (2x160) to the Dyn MW160 (they love power), and then the PQ10
bridged (2x80) to the X360a (mid and tweet).
The thing is, when I've bridged these amps in the past, they tend to run
hot (I've melted some of the DC inputs of the PQ20) and I think it affects
the SQ. The PQ's are only 4ohm stable bridged, so I am thinking that 3.0
Ohms (MW160 DC resistance (Re), but the nominal(Znom) is 4ohms), might not
be ideal for the PQ20 bridged. Looking at the MW160 spec sheet, it
indicates a 22uF cap and 3.9Ohm resistance in parallel with the driver,
but I don't really understand the electrical details.
I'd really like to use all the power I have . . . .
Thoughts?
--
Scott Walters
-PacketPusher
Message 2
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| Subject: | Re: I'm Out, first dibs |
--> XDP4000X-List message posted by: NOTGSXR@aol.com
In a message dated 11/27/2004 12:01:19 P.M. Eastern Standard Time,
scott@packetpushers.com writes:
> I'll take the PQ20 :) I could always use a Third ;)
hey, I hear ya. Hey do you run any of your PQ20's bridged?
If you do, what are you driving, and have you ever had any issues?
I also have a PQ10 (4x40) and am considering in my new install bridging
the PQ20 (2x160) to the Dyn MW160 (they love power), and then the PQ10
bridged (2x80) to the X360a (mid and tweet).
The thing is, when I've bridged these amps in the past, they tend to run
hot (I've melted some of the DC inputs of the PQ20) and I think it affects
the SQ. The PQ's are only 4ohm stable bridged, so I am thinking that 3.0
Ohms (MW160 DC resistance (Re), but the nominal(Znom) is 4ohms), might not
be ideal for the PQ20 bridged. Looking at the MW160 spec sheet, it
indicates a 22uF cap and 3.9Ohm resistance in parallel with the driver,
but I don't really understand the electrical details.
I'd really like to use all the power I have . . . .
Thoughts?
I've run the PQ20 bridged to a pair of Focal 6K4402's before with no
problems at all. I did not have any of the same things that you seem to be having
at all. The really don't seem to heat up much to me really. How is the Air
Flow? How is the space for cooling? How are the Gains? Are you running them
tooooo hard? The PQ20's have a lot of power really....... And are some of
the best amps ever IMHO. I currently just have 2 PQ20's, a PQ10 and a Pair of
A/D/S P4100's. I had a couple PH15's also. Some of the best amps ever made
:)
I would deffininitely not recommend running bridged less than 4 ohms
really..... this will surely heat it up as you describe.... now that i think about
it, i am not sure the DCR of the Focal i was using. I would think you may be
possibly ok, but i don't want to guarantee anything you know :)
I will soon be running a Pair of PQ 20's bridged to MorelUSA Triumph Tweets
and also MorelUSA MR56 dome mids. And a P4100 Bridged to a pair of MorelUSA
WR-8's.
They surely are some of the best amps available :)
Dan
Message 3
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| Subject: | Mackie Studio Monitor HR824 8" drivers? |
--> XDP4000X-List message posted by: NOTGSXR@aol.com
Just checking if there is any interest in these drivers. I originally got
them and intended on using a pair in each door for killer midbass but have
since gone another route.
Here is a link: _http://www.mackie.com/products/hr824/_
(http://www.mackie.com/products/hr824/)
These things retailed over $1000 each if i remember correctly.
Anyway, these are the OEM 8.75" drivers never used. I have 4 of them.
One of them has one of the basket posts broken off..... however there are 5
still in tact. The VC doesn't appear to rub at all and it should work as new
anyway :)
Any interest?
Dan
Message 4
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| Subject: | Re: I'm Out, first dibs |
--> XDP4000X-List message posted by: Scott Walters <scott@packetpushers.com>
> I've run the PQ20 bridged to a pair of Focal 6K4402's before with no
> problems at all.
Unable to find *any* specs on that driver on the Net or in Parts Express.
> I did not have any of the same things that you seem to be having
> at all. The really don't seem to heat up much to me really. How is the Air
> Flow? How is the space for cooling?
Back of rear seats, but it was so hot it just plain wasn't right.
> How are the Gains?
I've never gone more than half way.
> Are you running them
> tooooo hard?
Hells yes, and put away wet. But honestly the only time I it would get
too loud and distort were CD's with what I would consider higher than
normal/ideal recording levels (e.g. Linkin Park). I could turn the
Sheffield Reference stuff up to 0dB on the C90, and it would stay clean,
and far from deafining.
> I would defininitely not recommend running bridged less than 4 ohms
> really..... this will surely heat it up as you describe.... now that i think
about
> it, i am not sure the DCR of the Focal i was using.
> I would think you may be
> possibly ok, but i don't want to guarantee anything you know :)
I talked to a guy at the install shop and we agreed we should be able to
get away with it. I am going to try and contact a/d/s to see if they can
help. Not to mention I wouldn't be able to sleep at night thinking, I
wonder what 2x160 of a/d/s love to my MW160's would have sounded like. I
am thinking when I had this issue I was not highpassing at 78Hz, and that
would account for drawing way too much power (at least way more than
needed). Not to mention my skills as installer are highly suspect.
But I would love to know the DCR of the Focals.
> I will soon be running a Pair of PQ 20's bridged to MorelUSA Triumph Tweets
> and also MorelUSA MR56 dome mids. And a P4100 Bridged to a pair of MorelUSA
> WR-8's.
I'd love to hear your rig and those Morel's. One of few speakers I'd
consider worthy competition for the Dyns ;)
> They surely are some of the best amps available :)
Do you by chance have any specs/manuals for the PQ20. I have one for the
PQ8 (and the amp too)
--
Scott Walters
-PacketPusher
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