Bridged Channels and setting gains....

[websterbud 10+ year member]

I have a Merlin MD41 4 channel amp that I'm bridging to run a set of components. The amp is rated at 180x2 @ 4ohms mono. I've read the gain setting turorial and there is a link to JL's site about gain setting. JL's site says that the impedance each channel works at will be 1/2 the load inpedance. Therefore it is necessary to divide the actual load impedance in half and use this impedance on the chart when bridging two channels. Also, the voltage found on the chart should be doubled. Then it gives two examples.

Just the simple sqrt(power*resistance) = voltage and I get 26.8 volts. Is this right? The way JL does it I would be setting my gains at 38 volts. A little help?

Click to read more...

 

[websterbud 10+ year member]

little bump for some day crew help...

 

[Biker 10+ year member]

Heres your Amp specs.

4 x 60W @ 4 ohms

4 x 80W @ 2 ohms

2 x 160W @ 4 ohms bridged (THD:

So your going to bridge to 2 channels at 160 Watts each and you have Components rated at that much power. So I would connect 2 4 ohm speakers rated at 160 watts and set the voltage at around 26.8 Volts to each speaker.

 

[websterbud 10+ year member]

If the amp is rated 160 x 2 @ 4ohms bridged don't I want to set the gains to 25.3 volts?

 

[Biker 10+ year member]

That is correct (The SQ Rt of (4X160)) = 25.3

 

[TSC17 10+ year member]

I have a Merlin MD41 4 channel amp that I'm bridging to run a set of components. The amp is rated at 180x2 @ 4ohms mono. I've read the gain setting turorial and there is a link to JL's site about gain setting. JL's site says that the impedance each channel works at will be 1/2 the load inpedance. Therefore it is necessary to divide the actual load impedance in half and use this impedance on the chart when bridging two channels. Also, the voltage found on the chart should be doubled. Then it gives two examples.
Just the simple sqrt(power*resistance) = voltage and I get 26.8 volts. Is this right? The way JL does it I would be setting my gains at 38 volts. A little help?

I just ran across this exact same situation, and figured that I would tag onto this post instead of starting a new one.

My DLS A7 is rated at 200w @ 4ohms bridged. This would give me a voltage of 28.28. According to JL's tutorial, I would want to calculate this at 2ohms (because of bridging), and double the voltage, which would give me a desired voltage output of 40 volts (which seems quite high).

JL's tutorial is the only one I could find that directly addresses bridging.

What method is "correct" here?

Thanks.