Originally Posted by tibimakai
It is possible to switch between pulse or toggle switching
Not if I correctly understand what you are asking.
The main front power switch completely controls power to the amp. But when switching that on, power is then available but the amp does NOT turn on. In order to do that, either you need the appropriate signal on the Crestron port signal wires (and good luck deconstructing Crestron's proprietary network protocol) or a momentary press on the Bypass/Override button. As I said previously, holding that button down does not power up the amp. That only occurs when when you release the button which is therefore momentary action, not a toggle or latching in any way as that would not work.
I thought long and hard about this. I just wanted a trigger input that would power it on and off in sync with my pre/pro/AVR. Unfortunately all AVRs with a trigger output I've looked at use 12v, but converting the Crestron amp to use 12v instead of 24v would be way more complicated than is worthwhile. So since my AVR trigger output already switches on a power strip (for other equipment) I simply plugged a 24v wallwart into that so effectively have a 24v trigger signal. This is then perfect for switching the Crestron on and off with the AVR. So when the AVR is off, the Crestron uses NO power.
There have been other methods to achieve this. The first I looked at involved removal of each channel's power relay and other stuff that was more than I wanted to do. Similarly, a recent solution is to solder some wires to the Crestron board so each amp module just gets power directly, but in that case you're eliminating all Crestron's carefully designed protection circuitry. Hopefully that would not be an issue, but not a solution with which I'd be comfortable and it also disables the bypass/override button action.
I ended up designing a small board with some caps etc that on receiving power (from the 24v trigger) momentarily bridges the bypass/override button connection, thereby simulating a short button press that therefore causes the amp to fully power up, with all the protection circuitry fully enabled. Basically the Crestron circuitry cannot distinguish between what my board does and a real button press. Plus, when the 24v is live, the bypass/override button can still be used. So at any time once running a quick press will turn it off and conversely another press will turn the amp back on just as Crestron designed. My board ONLY operates when the amp first receives the 24v trigger signal.
Not trying to convince anyone, but I thought long and hard about the best way to do this and no other method I've come across is so unintrusive into the amp's electronics. It can of course be reversed in a matter of seconds once the cover is off as there's no butchering of the original parts. My board simply piggybacks onto the existing Crestron control board.
All it requires is some strip board and the components which cost peanuts. If you have a soldering iron, you could put it together. I've previously uploaded the plans/schematic somewhere but am happy to do so again if anyone needs.
Look, if anyone is desperate and wants to send their Crestron control board (from the 16 ch. amp) to me and pay me to modify it, I'll do it. How much would it be worth? How many people would want this?
They are a great amp. Although I have a second one so I could bridge all channels (therefore 16 x 200W), in fact I've not yet done so as with the standard rated 60W/ch I have NEVER used anywhere near full volume. That would be way too loud. I believe that 60W is with ALL channels running, so the amps are certainly not lacking in power.