Parallel/Bridge mono multiple amps

[Flamin_D]

After buying a few of the Crown Macro-tech amps, i started to look into the idea of Parallel Mono to obtain large power with two channels/separate amplifiers. Using a mono signal split into two identical signals with a Y-splitter, i thought - why not use two identical mono amplifiers on the same load in parallel? Using a jump wire on the two positive terminals and only using one amps ground (like the macro-techs).

I understand that unlike bridge-mono, differences in the two outputs are very sensitive, and they will try to drive each other even with the slightest difference. How do crown regulate both channels so that they are completely identical? I tried this method with a technics integrated amp, and after a minute of 50hz sine it fell into protection. (Still pretty impressed with that though, the channels read 0.1v different on the meter)

I have an Audiobahn APS10 which is a phase inverter/controller, which i have used in the past to create bridge-mono on integrated amps without a bridge function, with really good stable results. If i can get to grips with creating a stable parallel mono, i can create huge power potential by using four identical lower-powered amps - bridge-mono them in pairs, then parallel-mono the two pairs, taking advantage of both modes strengths.

Obviously for this to work the amps would have to be perfectly balanced and especially with cheaper mono amps they can all be slightly different from each other. Anyone got any thoughts or advice? Apart from go buy a high power amplifier lol, this is purely experimental

Thanks!

[Bill Fitzmaurice]

Anyone got any thoughts or advice? Apart from go buy a high power amplifier lol, this is purely experimental

Thanks!

Run each channel to its own cabs. Parallel bridging is only of benefit into lower impedance loads than each channel can handle individually. OTOH series bridging is only of benefit for delivering higher voltage loads into higher impedance loads. When you get down to it in the vast majority of cases the only real value of bridging lies in being able to advertise higher power ratings for the benefit of the average shopper who couldn't tell you the difference between a watt and a decibel.

[Flamin_D]

[quote="Bill Fitzmaurice] Run each channel to its own cabs. Parallel bridging is only of benefit into lower impedance loads than each channel can handle individually. OTOH series bridging is only of benefit for delivering higher voltage loads into higher impedance loads. When you get down to it in the vast majority of cases the only real value of bridging lies in being able to advertise higher power ratings for the benefit of the average shopper who couldn't tell you the difference between a watt and a decibel.[/quote]

.. if youre only using one cab I.E a single coil subwoofer and you want to use all the avalible power of your 2 channel amplifier then bridging makes sense - unless its a DVC and yes if you have 2 cabs.

[Bill Fitzmaurice]

.. if youre only using one cab I.E a single coil subwoofer and you want to use all the avalible power of your 2 channel amplifier then bridging makes sense -

Only in rare circumstances, namely if your amp is far too small for the application. In the vast majority of circumstances what limits the speaker output is its displacement. I've yet to read of an instance where the person who bridged had any understanding of the concept of displacement limited power, or required voltage swing for full output. They've all fallen into the 'I want to get all the watts out of my amp' category.
As for buying small amps with the intent of bridging them to make larger amps, the price per watt drops as the number of watts goes up, so one larger amp will almost always be less expensive than two or more smaller amps of the same net power.