[[email protected]]

I have an a/d/s pq20 amplifier that I have installed in my car. I think
I may have a problem though and wanted to see if someone could post the
specs and the original manual or a link. I have searched and searched.

My problem (if someone could help) is that I also upgraded my head unit
and the new unit has a 5V output (RCA) and I am afraid the PQ20, since
it was made so long ago, cannot handle a high voltage level. I know
there are HU's out there iwth 8V outputs which I personally think is a
bunch of marketting B.S., but nonetheless, the head unit I have has 5V
outputs and I otherwise love it and don't want to have to swap it out
again.

Anyway, I have to turn the gains down on the PQ20 to avoid
clipping/distortion and when I do this, I don't get the volume that I
expected out of my setup. At highway speeds with the windows down for
example, I cannot hear much of anything with the head unit volume at
100% (and the gains on the amp down enough to where it will not clip).
I can listen with the windows up and it is decent volume, but still not
as much as I had expected.

Setup:
a/d/s PQ20 amplifier
front stage: Polk Momo MMC6500 6.5" components in custom pods
rear fill: Boston 4x6 plate speakers
source: Pioneer Premier DEH-P880PRS

Thanks in advance for the help!

[Danny]

testing

[John Durbin]

The manual (I sent you a copy) says 45mv to 1.2V for 1 watt output,
which means with gain all the way down 1.2V in = only 1 watt out. I
think you should be able to use that amp with a deck with 5V out if the
gains are set fairly low.

JD

wrote:

I have an a/d/s pq20 amplifier that I have installed in my car. I think
I may have a problem though and wanted to see if someone could post the
specs and the original manual or a link. I have searched and searched.

My problem (if someone could help) is that I also upgraded my head unit
and the new unit has a 5V output (RCA) and I am afraid the PQ20, since
it was made so long ago, cannot handle a high voltage level. I know
there are HU's out there iwth 8V outputs which I personally think is a
bunch of marketting B.S., but nonetheless, the head unit I have has 5V
outputs and I otherwise love it and don't want to have to swap it out
again.

Anyway, I have to turn the gains down on the PQ20 to avoid
clipping/distortion and when I do this, I don't get the volume that I
expected out of my setup. At highway speeds with the windows down for
example, I cannot hear much of anything with the head unit volume at
100% (and the gains on the amp down enough to where it will not clip).
I can listen with the windows up and it is decent volume, but still not
as much as I had expected.

Setup:
a/d/s PQ20 amplifier
front stage: Polk Momo MMC6500 6.5" components in custom pods
rear fill: Boston 4x6 plate speakers
source: Pioneer Premier DEH-P880PRS

Thanks in advance for the help!

[digdug]

Thank you so much for sending the manual and responding.I guess I do
not fully understand the "Input sensitivity" rating and what it means.
I thought that it meant anything over 1.2V would be too hot for the
amplifier. I see some amplifiers claiming up to 8V input sensitivity,
since new head units have high voltage outputs so I thought that meant
5V would be too much for the PQ20.

Danny

John Durbin wrote:
The manual (I sent you a copy) says 45mv to 1.2V for 1 watt output,
which means with gain all the way down 1.2V in = only 1 watt out. I
think you should be able to use that amp with a deck with 5V out if the
gains are set fairly low.

JD

wrote:

I have an a/d/s pq20 amplifier that I have installed in my car. I think
I may have a problem though and wanted to see if someone could post the
specs and the original manual or a link. I have searched and searched.

My problem (if someone could help) is that I also upgraded my head unit
and the new unit has a 5V output (RCA) and I am afraid the PQ20, since
it was made so long ago, cannot handle a high voltage level. I know
there are HU's out there iwth 8V outputs which I personally think is a
bunch of marketting B.S., but nonetheless, the head unit I have has 5V
outputs and I otherwise love it and don't want to have to swap it out
again.

Anyway, I have to turn the gains down on the PQ20 to avoid
clipping/distortion and when I do this, I don't get the volume that I
expected out of my setup. At highway speeds with the windows down for
example, I cannot hear much of anything with the head unit volume at
100% (and the gains on the amp down enough to where it will not clip).
I can listen with the windows up and it is decent volume, but still not
as much as I had expected.

Setup:
a/d/s PQ20 amplifier
front stage: Polk Momo MMC6500 6.5" components in custom pods
rear fill: Boston 4x6 plate speakers
source: Pioneer Premier DEH-P880PRS

Thanks in advance for the help!

[Danny]

In my search to get more volume out of my system (while driving high
speeds) would I benefit from bridging the two channels on my PQ20 to my
two front speakers? Here is my setup:

Front stage:
- Polk 6.5" MMC6500 separates
- 70 W (4 ohm) per speaker from PQ20
Rear fill:
- Boston 4x6 plate speakers
- 70 W (4 ohm) per speaker from PQ20

What if I changed to this:

Front stage:
- 150W (4 ohm) bridged per speaker from PQ20
Rear fill:
- run from head unit

Would I just overdrive my front speakers or would I get more volume and
a nice clean sound? Currently I have the PQ20 gains set around 40% and
can turn the head unit up to around 55 out of 62 before I get any
distortion (eq flat with crossover set at 100hz & 12db slope). The
rears I have cut off at 200hz and 12db slope. I don't get distortion in
lows, just all freq's once I go over 55 on the head unit volume. My
goal is to get more sound out of the speakers without increasing
distortion, but don't know how.

[flyfisher55]

Greetings,
I too need the PQ20 Manual.

Be a prince and send it


--
flyfisher55

[BigBob]

If you ask nicely they will email you a PDF

"flyfisher55" wrote in
message ...

Greetings,
I too need the PQ20 Manual.

Be a prince and send it


--
flyfisher55