Hi there

[Artopsy 11]

I guess I'm into carvers now. in about a month and a half I have acquired
2 PM-600s which means I needed
a C-1 preamp  which came with
a TFM-25 and
a TX11
I have a PMX2 on its way.

my design is to tri amp a set of speakers.   why I am here to see if I can find a manual for the PMX2.

I am also running Kenwood BASIC M2(A) amps and a Sony M65.

Glad this site exists

[Balok 1,784]

Welcome.

[BobTFM35 3,214]

Welcome to the Carver Site!!

 

It sure looks like you are starting off with a nice selection of Carver equipment. I have bi-amped a set of Paradigm speakers first with a set of TFM35s then two Crimson 275s. Can't imagine trying to do a tri amp. 

 

What speakers will you be using?

 

Wish you the best, and looking forward to hearing about your project.

[Artopsy 11]

the speakers I will use are either a pair of pioneer CS-a700s or I have a set of white van speakers with aftermarket drivers, that I mounted 3 pairs of banana connectors to (one pair for each driver).   I will try it first with these since my pioneers are still original and I would hate to blow a driver that is not replaceable.
I have done this with a dbx234 and three kenwood amps in the past. It worked but running three amps was a little much.
I am waiting for delivery of the PMX2 card with Manuals !!! for my PM-600 and see what I can do with that. I know it can bi amp    and i think it might tri amp, it might not. finding documents on these is impossible.  I will scan the manual, probably, and load it here if that is allowed.

[Jeff Stone 390]

Welcome to TCS!

[BobTFM35 3,214]

The Pioneer CS-A700s kind of reminds me of my Coral speakers. Same time period and manufactured in Japan. The 700s are very nice and I agree with you about not experimenting with them. They are a classic.

 

I find it interesting that they have a Service Manual for your speakers,

https://www.manualslib.com/manual/4316915/Pioneer-Cs-A700.html?page=2#manual

 

 

 

[Receiver2000 5,023]

Welcome!!!! Nice bunch of Carver you have.

[Artopsy 11]

12 hours ago, BobTFM35 said:

I find it interesting that they have a Service Manual for your speakers,

https://www.manualslib.com/manual/4316915/Pioneer-Cs-A700.html?page=2#manual

 

 

 

the service manual has been helpful.   for things like a starting point for crossover frequencies and the part # for replacements on the 12" drivers.

When I got them the 12s had been replaced with the correct pioneer replacements but they were black cones. I was able to find some original FB  tan cones  Probably not much sonic difference but now they are correct.

[BobTFM35 3,214]

Looked at a pair, one was black and the other was tan, so I can see why you changed it back to tan. It just looked more pleasing and, as you said, correct.

[Cring08 293]

WELCOME!

[Charlie 19,905]

[Artopsy 11]

On 7/7/2026 at 8:48 PM, BobTFM35 said:

The Pioneer CS-A700s kind of reminds me of my Coral speakers. Same time period and manufactured in Japan. The 700s are very nice and I agree with you about not experimenting with them. They are a classic.

 

I find it interesting that they have a Service Manual for your speakers,

https://www.manualslib.com/manual/4316915/Pioneer-Cs-A700.html?page=2#manual

 

 

 

First off that is the cleanest CS-a700 manual I have seen yet!   thanks

So I did the tri amping of the home brew speakers.
took me some time, I decided to rewire it internals on the speakers for better connections.  Once that was done.

Its the c-1 to the DBX234s   (TRS jacks)  
DBX234 low to PM-600 #1
Mids to PM-600 #2
highs to TFM-25

 

Sounds good,  whole lot of dials to fiddle with now!!

I may move the TFM to the bass, for two reasons 1 there is a bit more wattage on the tfm-25 over the PM600s 2 the pm-600s have the ability to adjust gain where the TFM does not

When I did this before there was a slight hum in the system i really thought my dbx had an issue.  Individually the three amps and their pre amps had no hum.

  This time I plugged the C-1, the dbx234s, the tfm-25 PM-600 #1 and PM-600#2 all into one power strip with nothing else in the strip. the power strip is plugged into a power conditioner. So between the aligned power or the rewiring in the speakers or of course the amps and pre-amp.. the hum seems to be gone, we'll see as things warm up.

edit: after one CD... the hum is back

Now I need some major cable management now it's a snake pit 

[Half Life 1,515]

Welcome from Virginia! Enjoy your stay!

[Artopsy 11]

5 hours ago, Artopsy said:

edit: after one CD... the hum is back

 

hmmmm   now the hum is gone, i think. it is very soft and not affected by volume control