I have this amp at work here is specs: my model is the 724
http://www.toa.jp/international/products/p...fiers/a700.html

now my question is on our preamp output plug is hooked to a smaller preamp what I mean is its hooked up using a phono audio plug in the aux output from smaller reciever to this 724 output plug of preamp out. Can any reciever just like this smaller one thats hooked up to it now go in that place if say i want to upgrade the smaller on to a more powerful one.

If so will my 724 output the same into its output with no probs? meaning if hooked aux new unit to 724s preamp out?

Thanks if you understand the commerial amps. By the way spearkers are on 25 v just for heck of mentioning.

I hope I posted this correctly I only assumed this type of question is audio hardware.

That's confusing... I don't think you have an output connected to an output!

I think you have it connected like this:

724 Preamp Out ----> Receiver Aux-In (?)

The sound comes out of the 724 PA amplifier, into the receiver, and then out of the speakers (or headphones) connected directly to the receiver... Right?

But, the answer is yes. You can a different receiver. Line-level inputs/outputs are standardized, and you can generally connect any line (or Aux) output to any line (or Aux) input. You can use a receiver's auxiliary input for a CD player, a DVD player, a VCR, a tape deck, etc... They all put-out line-level signals. (The exception is a turntable/phonograph which has a much lower signal level.)

There are 2 types of line-level connections -

- All home audio/video equipment uses unbalanced connections (1 signal wire and one ground/shield for each channel/signal). These connections are usually made with RCA (phono) connectors. Regular (non-professional) computer soundcards also use unbalanced connections and a 3.5mm stereo phone plug/jack.

- Most professional equipment (but not all PA amplifiers & mixers) uses balanced connections (two signal wires and a ground/shield for each channel/signal). These connections are usually made with XLR connectors or 1/4" TRS connectors.

- The same is true with microphone connections. Mics can be either "high impedance" unbalanced, or "Low impedance" balanced.

on the smaller one it has 1 aux on it if you plug music into it it plays music with the aux button so I think what you said is right concerning the smaller one. I think I just described the output to output dif thinking the aux on smaller one was a output. so yea it sounds like a input on smaller one inputing music as a example from the output which is music.

on the preamp out button like you said you can hook another reciever up. I think thats cool since its outputing all what the 724 puts out into the aux of another recievers output whatever that may be called on it. What if I wanted to add a third reciever and it had a output or no output how would you do that? Would it continue the copying of the 2nd reciever the 724 is puting out from its preamp out?

Sound comes OUT of an OUTput, and IN to an INput. As long as you keep that in mind, and think about the signal flow (where the sound is coming from and going to), you should be OK. (Draw yourself a little "block diagram" with arrows showing the the direction of signal-flow if it helps.)

As far as hooking-up two or more receivers... The best way to hook-up 2 or 3 receivers is to use one or more Y-Adapters to essentially give you more outputs from the PA amplifier. But, I wouldn't hook-up 10 receivers that way... At some point you will overload the output. If you are hooking up lots of receivers, you need something called a "distribution amplifier".

Speaking of Y-Adapters, you can also use a Y-Adapter (probably with different connectors) to connect the left & right receiver inputs to a mono source/output. (You should never do the opposite... you should never use a Y-Adapter to connect a stereo output to a mono input... The thing to keep in-mind is that it's OK to connect 2 or more inputs together, but you should never connect 2 or more outputs together because that could damage the electronics.)

If a reciever does not have an Aux-In, you can use a CD or Tape input.

You could also "dasy-chain" the receivers. That means hooking them in series, with the output of the 1st driving the input of the 2nd, etc. Most receivers don't have a "Preamp Out", but most do have "Tape Out". The Tape Output is not affected by the volume or tone controls, which is probably the way you want it.... You don't want the volume setting on the 1st receiver to affect the 2nd. However, the signal to the Tape Output is affected by the selector switch.... So, if you turn the 1st receiver to AM or FM, that signal will also be sent to the 2nd reciever. And, each receiver in the dasy-chain will add some noise, and if you daisy-chain too many receivers together the noise could become an issue.

thank you you really taught me a lot. How can you find out how much your amp is puting out meaning if you can't tell how much each speaker is taped off on? For instance we use 25v speaker mode but suppose I want to know what my amp is taking so I dont over do it with to many speakers.

btw here is a good example.

I guess boast here is tape in and out like you said:
http://cgi.ebay.com/McGohan-100-watt-Comme...Q2em118Q2el1247

I wonder how they hook up phone lines too this so that you can page? How do you assume using a common phone line they do that? like example 710# pushing on phone makes so you page and such?

did a bit of searching for heck of it. Does this mean anything to what I am thinking?
http://www.twacomm.com/catalog/model_PA-30.htm