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-   -   Hypex UCD180 (OEM) - how to bridge? (http://www.diyaudio.com/forums/class-d/228720-hypex-ucd180-oem-how-bridge.html)

Pallas 26th January 2013 11:12 PM

Hypex UCD180 (OEM) - how to bridge?
 
I recently picked up an commercial amplifier based on the UcD180 module, and I'm curious how to bridge it. The maker offers the amp as a monobloc as well (same chassis, PS, and I believe amp board) so I expect it's possible, but I'm not sure how it would be wired up for a bridge.

The curiosity is mostly academic - I plan on measuring the frequency of a few different Class D based on different chipsets into real speakers, compared to a reference-grade Class AB unit, to quantify whatever actual differences the different approaches may cause when driving actual loudspeakers. My standard use for the amp will be as a stereo unit. (And, if its HF frequency response is truly as insensitive to load as a good AB amp, then perhaps as my measurement amp as well.)

nigelwright7557 28th January 2013 01:51 PM

You would need a phase splitter to generate the two opposite phases for the amplifiers.
Then the output is taken from the two amplifier outputs.

ViennaTom 28th January 2013 03:10 PM

I 'd recommend an an active line level low noise-OPAMP inverter (e. g. OPA134 powered by + / - 15Vdc) - it could output 2 signals 180 out of phase, they can then be sent to 2 half-bridge stages, whose grounds / supply rails must be interconnected in order to "harvest" the bridged output power from the two "hot" connectors.

ds23man 28th January 2013 03:16 PM

The Hypex amps are all balanced in!!!!!!!!! Just reverse the input on one amp, no need for phase splitters.

ViennaTom 28th January 2013 03:29 PM

"The Hypex amps are all balanced in!!!!!!!!! Just reverse the input on one amp, no need for phase splitters."

I agree. This is the easiest way to go in this case.

Pallas 28th January 2013 08:00 PM

Quote:

Originally Posted by ViennaTom (Post 3345826)
"The Hypex amps are all balanced in!!!!!!!!! Just reverse the input on one amp, no need for phase splitters."

I agree. This is the easiest way to go in this case.

This particular one (I don't know why I was cagey with the brand/model earlier; it's a Pro-Ject Amp Box SE) only has single-ended inputs.

At any rate, it does seem like it might be too much trouble for what I want to do. I thought maybe, as with a lot of amps, one could just feel them the same signal, and connect one terminal from each channel.

Koifarm 28th January 2013 09:28 PM

Look here for more info.

http://www.diyaudio.com/forums/class...-ucd-amps.html


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