Factor PA2000

Is this amp OK?
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chrisj360
Posts: 106
Joined: Fri Sep 20, 2013 1:37 pm
Location: Bellingham, WA

Factor PA2000

#1 Post by chrisj360 » Wed Oct 25, 2017 10:57 pm

My work updated all the A/V gear and was giving the old stuff away. Snagged this and it seems like should run a pair of Otop12's just fine or the a pair of T30's okay.

Definitely not looking a gift horse in the mouth.... :) It should play nicely with my 2 Crown XLS2500's for the 2 Otop's and soon 4 T30's.

Got also another Factor PA1000 as well and some wireless mics. :hyper:

Thoughts?

http://www.mcssl.com/store/factorelectr ... b1a71726a6

Specifications:
Frequency Response: 20 Hz – 20 kHz (+/- 1dB)
Signal-to-Noise Ratio: > 100 dB A-weighted
THD+N <0.1%
Voltage Gain 37dB +/- 0.5dB
Input Impedance: 20 kΩ (bal) 10 KΩ (un-bal)
Damping Factor >500

Power Rating:
600W per channel into 8 ohm stereo loads
1000W per channel into 4 ohm stereo loads
1500W per channel into 2 ohm stereo loads
2000W bridged mono into 8 ohms
3000W bridged mono into 4 ohms
Dimensions: (W x H x D):19”/482mm 3.5”/88mm 17”/432mm
Weight: 20.5lbs / 9.3kgs

Features:
2 Ohm stable operation
Variable speed ultra-quiet cooling fan
Power ready, Signal Present, Clip & Protect
LED indicators for each channel
Front panel level controls
Switched soft knee clip limiters
Switchable stereo, parallel and bridge mode
Soft start in-rush current limiting
Input via 1/4’’TRS and XLR connectors
Speaker outputs via Speakon® connectors
Speaker outputs via two pairs of heavy duty binding posts
2 x 21" T30's with Lab12's
2 x 28" T30's with Lab12's
2 x OTop12 with Deltalite 2512

chrisj360
Posts: 106
Joined: Fri Sep 20, 2013 1:37 pm
Location: Bellingham, WA

Re: Factor PA2000

#2 Post by chrisj360 » Thu Oct 26, 2017 1:14 am

I am thinking of running the Otops off the PA1000 (RMS Power @ 8ohms Continuous 350W according to the specs & if I am recalling right the Otop12's with the Deltalite's have should be limited at 25 volts giving them plenty of headroom at 52 volts) and then two T30's off each Crown XLS2500 ( 2400W bridged @ 4ohms giving them also plenty of headroom 97 volts to the Lab12 50 volts) to give them the same limiter settings from the dbx PA.

Guess I'll keep the PA2000 in the reserve in case something goes south.

I don't like bridging per stated in the plans but previously running the Crown's, I know they didn't have much headroom (440W at 8ohms being 59 volts or 775 at 4ohms being 55 volts).

Am I missing anything?
2 x 21" T30's with Lab12's
2 x 28" T30's with Lab12's
2 x OTop12 with Deltalite 2512

Grant Bunter
Posts: 5875
Joined: Mon Nov 28, 2011 11:12 am
Location: Ilfracombe Queensland Australia
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Re: Factor PA2000

#3 Post by Grant Bunter » Thu Oct 26, 2017 4:40 am

The PA1000 is probably good for 2 x Otops12's a side.

The 2510 can be limited to 40V, so the 2512 you're using is probably good for 45V.

The PA1000 is doing 46V at 4 ohms, and that doesn't seem like any headroom,
But the 2512's will distort well before they reach their voltage limit. If you hear distortion, turn down, or add more cabs...
Built:
DR 250: x 2 (melded array) with March 2012 plans.
T39's: 4 x 20" BP102 , 2 x 28" 3012lf.
WH8: x 3 with melded array.
Bunter's Audio and Lighting "like"s would be most appreciated...

Bruce Weldy
Posts: 6365
Joined: Fri Nov 27, 2009 11:37 am
Location: New Braunfels, TX

Re: Factor PA2000

#4 Post by Bruce Weldy » Thu Oct 26, 2017 7:31 am

chrisj360 wrote: two T30's off each Crown XLS2500 ( 2400W bridged @ 4ohms giving them also plenty of headroom 97 volts to the Lab12 50 volts) to give them the same limiter settings from the dbx PA.
I tried this a few years ago. Having to try and limit the signal that much - to get it down from 97 to 50 caused me some gain issues in the drive rack if I remember correctly......sorry, just can't remember the exact issue. That's why I went with the XLS1500 bridged - closer to the correct voltage with plenty of headroom.

I think that by limiting the output of the Driverack that much, I was hitting the lights on the inputs to get enough signal before limiting.....sorry...just can't remember exactly.

6 - T39 4-25" 2-22" 3012LF
4 - OT12 2512 Melded/NSD2005
1 - T24
2 - XF210


"A system with a few knobs set up by someone who knows what they are doing is always better than one with a lot of knobs set up by someone who doesn't."

chrisj360
Posts: 106
Joined: Fri Sep 20, 2013 1:37 pm
Location: Bellingham, WA

Re: Factor PA2000

#5 Post by chrisj360 » Thu Oct 26, 2017 10:00 am

Thanks Grant for sharing about the Otop voltage and amp thoughts.

Cheers Bruce for letting me know about your past experience with the Crown's 2500 in bridge mode. I hadn't thought about that when theorizing about the potential set up. "With great power, comes great responsibility..." or limiting...:)

How much headroom should one be looking for in an amp versus what the driver can take? 1/3 the voltage as a ball park number? The Lab12 takes 50 volts at 8ohms for 312W. The Crown XLS2500 does 59 volts at 8ohms for 440W unbridged. I remember previous conversations about peaks in watts & voltage, hence the brick wall limiter.
2 x 21" T30's with Lab12's
2 x 28" T30's with Lab12's
2 x OTop12 with Deltalite 2512

Bruce Weldy
Posts: 6365
Joined: Fri Nov 27, 2009 11:37 am
Location: New Braunfels, TX

Re: Factor PA2000

#6 Post by Bruce Weldy » Thu Oct 26, 2017 10:49 am

chrisj360 wrote:Thanks Grant for sharing about the Otop voltage and amp thoughts.

Cheers Bruce for letting me know about your past experience with the Crown's 2500 in bridge mode. I hadn't thought about that when theorizing about the potential set up. "With great power, comes great responsibility..." or limiting...:)

How much headroom should one be looking for in an amp versus what the driver can take? 1/3 the voltage as a ball park number? The Lab12 takes 50 volts at 8ohms for 312W. The Crown XLS2500 does 59 volts at 8ohms for 440W unbridged. I remember previous conversations about peaks in watts & voltage, hence the brick wall limiter.
I would give the 2500s a try with one per channel - set the limiters and see what happens when you hit it hard. A blinking light won't kill you on the amp.....just don't want it staying lit. And at 50 volts - I would think it would be alright.

As to how much you should have in headroom...... the 1500s bridged are about 1500 watts at 4 ohms. So, with limiting to 55-56 volts, it a little less than double the power needed.....

It's worked for me for several years....have yet to blow a sub driver....but then, I probably don't push 'em as hard as you young fellas do.

6 - T39 4-25" 2-22" 3012LF
4 - OT12 2512 Melded/NSD2005
1 - T24
2 - XF210


"A system with a few knobs set up by someone who knows what they are doing is always better than one with a lot of knobs set up by someone who doesn't."

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