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Surfdrake

Amp into protect mode

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Surfdrake

I have a 2010 Malibu wakesetter 23lsv. My stereo setup is: 4 rev10s, wetsounds 420sq , factory Rockford in boat speakers, a sundown sa12. Powering them is a wetsounds sd2 for the towers and a wetsounds syn-dx6 powering the in boats and a sub. The factory Rockford amp powering the in boat speakers was going into protect mode when the volume is around 75%. I put the new wetsounds syn-dx6 in its place to hopefully cure the problem. Now my wetsounds amp is going into protect mode also. I have all 8 in boat speakers wired to 2 ohms going to the amp. I’ve tried unplugging different channels to narrow the problem down but the amp still goes in protect mode when the volume is up. What would cause this problem?

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MLA

Does the amp flash a code? Have you measure the impedance of the woofer circuit and all 4 speaker pair circuits to see what they are? Voltage at the amp?

Dont forget that your audio equipment dealer can also be an avenue for support for you.  

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Surfdrake

Yes it’s flashing the thermal protection for channels 1 or 2. I’ve disconnected channels 1 and 2 but I still get the same code. I’ve double checked the ohms on all speakers with the multimeter, all coming back to 2 ohms. I wonder, under load, if the ohms drop a hair under 2 ohms? 

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MLA

Yes, completely normal for the nominal impedance to fluctuate under load. The amp should be designed to deal with it, as its expected. Try running one of the suspect chnls at 4 ohm, by removing one speaker from the circuit at a time. Other chnl remains at 2 ohm. Slow process, but you can isolate all 4 speakers at the end. Also moving the 1/2 speaker connectors to 3/4 and 3/4 over to 1/2 and see if if the problem moves or stays. 

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Surfdrake

Okay I’m gonna try that tonight. Hopefully I can figure it out before the weekend so I can hit the water. Thanks for your help!

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