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The specs are the same on those 3 amplifiers down to 2 ohms stereo, 4 ohms mono. Performance wise there is no noticeable difference unless the load drops below that limit which then the PM860 (S860)...

Hello, The PCR800, PM840 and PRO POWER ONE use 4 output mosfets per channel, the PM860 uses 6. The PCR800 uses four S4010L 10A 400V SCRs on the power supply while the PM840, PRO POWER ONE and...

"PM 860 inputs are 1/4" phone plug. Well, at the very least, MINE ARE!

Awesome post!"

Yes, you are correct.

Hello Cyclecamper,

Yes, that was an error on my part. The PM1600, Pro-Power 8, PR1800, 900X2, A900PRO are all the same amplifier except that the PM1600 does not have the protection circuitry board...

Hello,

Like JBLAddict said the SC should not have an issue moving those speakers. My previous experience with one of my A400PROs was similar and I traced the problem to the input board. There was...

Thanks MJWPicMan,

I have owned several of these amplifiers for a long time and was always puzzled about their return of quality sound and power per dollar vs. other brands of the same era which...

cadex18,

Please send me your email by private message.

Rick.

A better example...

http://www.e-dan.co.uk/electronics/wiringtrans.html

http://www.e-dan.co.uk/electronics/wiring.gif

Good luck.

Hello Titanium Dome,

I don't have a DX4200 to use as a reference but I will explain it in a simple way.

Transformers which are dual voltage have 2 pairs of primaries (4 wires).

So if the...

William,

Check your email.

Hello William,

Please PM me your email.

BTW,

Did you replace the input (25mfd np) caps?

Hunter,

What kind of speakers do you have?

What's their impedance?

What is their maximum wattage rating?

Can they be bi-amped? This is a safer route but not as much wattage.

Hello,

Any amplifier which is bridged must be at least 4 ohms stable in stereo mode (your amps are). The reason for this is because once bridged the left (a) will see half the load and the right...

William,

Here are some links to the output transistors available today for the soundcraftsmen models with mosfet outputs.
...

Cool.

That's the same PP3 without LED's I took the picture of the input board.

I have the same eq in excellent condition in the closet.

Maybe I should sell it.

Hello,

The schematics for the output section for both amplifiers is almost if not identical even if the PCB boards look different.

The power supply and fan on the PP3-4 pushes it to 205W/CH at...

Hello,

The schematics for the output section for both amplifiers is almost if not identical even if the PCB boards look different.

The power supply and fan on the PP3-4 pushes it to 205W/CH at...

And one of my setups.

A400 prototype just for eye candy.

No input/bridge board on this baby.

Clean powerful sound....cheap.:)

Am I going to get in trouble for posting so many pics?:o:

BTW, there's no serial...

A200 PRO barebones.

Also has an input/bridge board that is necessary for bridging but I use this from Rod Elliot's web site.

http://sound.westhost.com/project20.htm

Why? Because the amp can...

PRO POWER 3.

Notice the input board with a TL072 opamp which is one of the most replaced/hated opamps in audio.

Note: When this input board is bypassed the feedback resistors MUST be changed to...

Thanks.



Mucho toys to play with!:D



I definitely agree.

The newer amps might sound cleaner for several reasons.

Aging of the caps and other components.
Newer components might measure to better standards or simply sound better.
Transistors in the...

I was looking at the schematics today and noticed that the earliest PCR800s (the ones with the sided power switch, vented front cover and blinking power light) have a board which only acomodates 4...

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