PPI Promos 25 - Actual output?

Sub Ace · 9th September 2007, 02:05 AM

Hello Everyone! Thank you for letting me join your forum! I've been a vistor here quite a few times and I admire the wealth of technical knowledge here.

So here goes my first post. I recently purchased a PPI Promos 25 and was wondering what the bridged output is at 4 ohms and 2 ohm @ 13.6V and 14.4V? I understand that this amp is conservative rated and want to match the right sub to it.

I will be using it to replace a MTX Thunder 302. I expect the sound quality and power output will exceed the 302's rating of 425 watts bridged 4 ohms @ 14.4V.

Any info would be greatly appreciated!

Thanks Again!

ppia600 · 9th September 2007, 03:10 AM

I think the pro mos 25 is:

25 watts by two channels into 4 ohms stereo
50 watts by two channels into 2 ohms stereo
100 watts by two channels into 1 ohms stereo
200 watts into one channel bridged into 2 ohms

That is if its the white one with fins. I had a pro mos 50 with fins and it was 400 watts rms bridged into 2ohms.

They are pretty under rated though. There is no way it will be more powerful than your mtx 302. That is a really good amp, and also under rated. It is also more advanced in design than the ppi which doesn't mean its better, but it does help in the power output department. The pro mos is mosfet in the power supply and bipolar for the output stages. The mtx is mosfet for both the power supply and output stages. I'm going to go check a few things because I was thinking the pro mos 25 was more like 200 watts bridged into 2 ohms... not sure though..

Sub Ace · 9th September 2007, 05:07 PM

Yes it is a white one with fins. Is the output section on the Promos 25 unregulated? Sounds like I will need a higher efficiency sub, upwards of 93db, to get the best use of the PPI amp.

Thanks Again!

ppia600 · 9th September 2007, 07:38 PM

I'm not sure if they are regulated, but since they are the ones designed for cheating in competitions, it is likely it isn't. I believe the art amps and power class lines are regulated, but not sure about those. I used to run my pro mos 50 bridged into 2 ohms mono into an image dynamics IDQ 12 and it was very impressive.
Maybe you should look into using a ported box and designing the box around the woofer and the vehicle to make use of the amp's power.

junglejuice · 10th September 2007, 07:48 AM

According to my recollection all the white ppi amps where tightly regulated. As far as being under rated all the reviews that I remember of the art series all showed that they produced very near their rated output, that is opposed to others that don't get near to their rated output. I also have a vague recollection that the output was 2 x 12.5 @ 4 ohms but at the moment I can't find my old ppi catalogue to confirm this...
I hope that this helps some....

ppia600 · 10th September 2007, 12:51 PM

/\ I was thinking 12.5 at first too, but can't find any literature either. I know my pro mos 50 was 50 by two (not the freak black art one I have now). It was written on top of the amp and mine was the white finned type with the nice colorful silk screening on the top, too.

junglejuice · 10th September 2007, 10:24 PM

I found my catalogue and it states that

the Pro Mos 12 was

2 x 12.5wrms @ 4 ohms
2 x 25wrms @ 2 ohms
2 x 50wrms @ 1 ohm
1 x 100wrms @ 2 ohms

the Pro Mos 25 was

2 x 25wrms @ 4 ohms
2 x 50wrms @ 2 ohms
2 x 100wrms @ 1 ohm
1 x 200wrms @ 2 ohm

the Pro Mos 50 was

2 x 50wrms @ 4 ohms
2 x 100wrms @ 2 ohms
2 x 200wrms @ 1 ohm
1 x 400wrms @ 2 ohms

the Pro Mos 425 was the same spec as two Pro Mos 25's and the Pro Mos 450 was the same as two Pro Mos 50's.

These were the white finned variety that ran at the same time as the art series....

I hope that this clears up some details...

Junglejuice

junglejuice · 10th September 2007, 10:26 PM

So to answer the original question if you have have an amp that puts out 400+ wrms then you Pro Mos 25 will not get any where near it as it is only good for 200wrms....

ppia600 · 11th September 2007, 12:29 AM

Cool.. so post 2 is correct then

We must have both gotten the 12 and the 25 confused at first. Would there happen to be anything about my black art pro mos 50 in your catalogue?

junglejuice · 11th September 2007, 12:34 PM

No, only the finned white ones. As I said before I have never seen one like yours before.
Don't forget I would really like to know the rail voltages of those two amps of yours...
Cheers, Junglejuice....

9th September 2007, 02:05 AM	#1
Sub Ace diyAudio Member Join Date: Sep 2007	PPI Promos 25 - Actual output? Hello Everyone! Thank you for letting me join your forum! I've been a vistor here quite a few times and I admire the wealth of technical knowledge here. So here goes my first post. I recently purchased a PPI Promos 25 and was wondering what the bridged output is at 4 ohms and 2 ohm @ 13.6V and 14.4V? I understand that this amp is conservative rated and want to match the right sub to it. I will be using it to replace a MTX Thunder 302. I expect the sound quality and power output will exceed the 302's rating of 425 watts bridged 4 ohms @ 14.4V. Any info would be greatly appreciated! Thanks Again!

9th September 2007, 05:07 PM	#3
Sub Ace diyAudio Member Join Date: Sep 2007	Thanks ppia600 Yes it is a white one with fins. Is the output section on the Promos 25 unregulated? Sounds like I will need a higher efficiency sub, upwards of 93db, to get the best use of the PPI amp. Thanks Again!

11th September 2007, 12:34 PM	#10
junglejuice diyAudio Member Join Date: Oct 2001 Location: Brisbane, Queensland	No, only the finned white ones. As I said before I have never seen one like yours before. Don't forget I would really like to know the rail voltages of those two amps of yours... Cheers, Junglejuice.... __________________ Do it once, Do it right!!!!!

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Survey - Actual Amp Temperatures	keypunch	Solid State	8	20th December 2004 12:57 AM
Actual Pcb for Aleph-X - Can anyone help?	lpm76	Pass Labs	5	24th September 2004 11:17 PM
Actual capacitance on V+ & V- (gainclone)	Joshua Layne	Chip Amps	4	31st January 2004 01:02 AM


	Please consider donating to help us continue to serve you. Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving

9th September 2007, 03:10 AM	#2
ppia600 diyAudio Member Join Date: Jun 2007 Location: Louis y ana	I think the pro mos 25 is: 25 watts by two channels into 4 ohms stereo 50 watts by two channels into 2 ohms stereo 100 watts by two channels into 1 ohms stereo 200 watts into one channel bridged into 2 ohms That is if its the white one with fins. I had a pro mos 50 with fins and it was 400 watts rms bridged into 2ohms. They are pretty under rated though. There is no way it will be more powerful than your mtx 302. That is a really good amp, and also under rated. It is also more advanced in design than the ppi which doesn't mean its better, but it does help in the power output department. The pro mos is mosfet in the power supply and bipolar for the output stages. The mtx is mosfet for both the power supply and output stages. I'm going to go check a few things because I was thinking the pro mos 25 was more like 200 watts bridged into 2 ohms... not sure though..

9th September 2007, 07:38 PM	#4
ppia600 diyAudio Member Join Date: Jun 2007 Location: Louis y ana	I'm not sure if they are regulated, but since they are the ones designed for cheating in competitions, it is likely it isn't. I believe the art amps and power class lines are regulated, but not sure about those. I used to run my pro mos 50 bridged into 2 ohms mono into an image dynamics IDQ 12 and it was very impressive. Maybe you should look into using a ported box and designing the box around the woofer and the vehicle to make use of the amp's power.

10th September 2007, 07:48 AM	#5
junglejuice diyAudio Member Join Date: Oct 2001 Location: Brisbane, Queensland	According to my recollection all the white ppi amps where tightly regulated. As far as being under rated all the reviews that I remember of the art series all showed that they produced very near their rated output, that is opposed to others that don't get near to their rated output. I also have a vague recollection that the output was 2 x 12.5 @ 4 ohms but at the moment I can't find my old ppi catalogue to confirm this... I hope that this helps some....

10th September 2007, 12:51 PM	#6
ppia600 diyAudio Member Join Date: Jun 2007 Location: Louis y ana	/\ I was thinking 12.5 at first too, but can't find any literature either. I know my pro mos 50 was 50 by two (not the freak black art one I have now). It was written on top of the amp and mine was the white finned type with the nice colorful silk screening on the top, too.

10th September 2007, 10:24 PM	#7
junglejuice diyAudio Member Join Date: Oct 2001 Location: Brisbane, Queensland	I found my catalogue and it states that the Pro Mos 12 was 2 x 12.5wrms @ 4 ohms 2 x 25wrms @ 2 ohms 2 x 50wrms @ 1 ohm 1 x 100wrms @ 2 ohms the Pro Mos 25 was 2 x 25wrms @ 4 ohms 2 x 50wrms @ 2 ohms 2 x 100wrms @ 1 ohm 1 x 200wrms @ 2 ohm the Pro Mos 50 was 2 x 50wrms @ 4 ohms 2 x 100wrms @ 2 ohms 2 x 200wrms @ 1 ohm 1 x 400wrms @ 2 ohms the Pro Mos 425 was the same spec as two Pro Mos 25's and the Pro Mos 450 was the same as two Pro Mos 50's. These were the white finned variety that ran at the same time as the art series.... I hope that this clears up some details... Junglejuice

10th September 2007, 10:26 PM	#8
junglejuice diyAudio Member Join Date: Oct 2001 Location: Brisbane, Queensland	So to answer the original question if you have have an amp that puts out 400+ wrms then you Pro Mos 25 will not get any where near it as it is only good for 200wrms....

11th September 2007, 12:29 AM	#9
ppia600 diyAudio Member Join Date: Jun 2007 Location: Louis y ana	Cool.. so post 2 is correct then We must have both gotten the 12 and the 25 confused at first. Would there happen to be anything about my black art pro mos 50 in your catalogue?

New To Site?	Need Help?
Register to Participate Search Privacy Statement Contact Us	Frequently Asked Questions Did you forget your password? Mark Forums Read