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Old 23rd February 2012, 03:46 PM   #1
m4ick is offline m4ick  United States
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Default MMATs 3000.1

This is the first HIP4080 amp that I've had the pleasure of working on.

I know that the HIP4080 almost always fails when an output shorts (this amp had 2 shorted 4710s). Is it safe to remove the two shorted outputs and power it on to see if the HIP4080 is good or will it likely do more damage?
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Old 23rd February 2012, 08:23 PM   #2
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You can try it. Have everything clamped and a 10-15 amp fuse in the B+ line.

Before you begin, you should know that the replacement 4710s are a gamble. Some work and some don't. The IRF3701Zs are reliable but are rated lower than the 4710s. If the owner is like every MMATS owner around here and insists on running it below its lowest rated load, it may not be reliable.
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Old 24th February 2012, 01:12 AM   #3
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M4ick, you have mail!
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Old 24th February 2012, 01:19 AM   #4
m4ick is offline m4ick  United States
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Thank you speaker!

Perry, are there any reliable distributors of these parts (IRFB4710). I just bought 6 from mouser and 4 1N6287As from DigiKey, along with a HIP4080AIP.

Woops. 1N6287AGs I guess, think those are just lead free.
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Old 24th February 2012, 01:25 AM   #5
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Quote:
Originally Posted by m4ick View Post
Thank you speaker!
You are welcome, let us know how it works out.

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Old 24th February 2012, 01:28 AM   #6
m4ick is offline m4ick  United States
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Haha, I need to stop posting after 9PM. I ordered the 4710s from FutureElectronics.com.
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Old 15th March 2012, 11:38 AM   #7
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Update?
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Old 15th March 2012, 02:30 PM   #8
m4ick is offline m4ick  United States
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I ordered the HIP4080s from DigiKey but had them sent to my old address. I just got a refund and have re-ordered them.
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Old 15th March 2012, 05:11 PM   #9
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Cool, I have a D100CH that I believe has the HIP4080 defective. Mine plays at low volumes on sine wave but only puts out 16-18v on the speaker terminals once I turn the gain up to get normal volume it starts to dirstort/clip pretty bad. But if I keep the speakers output at 18v or below it plays just fine.

I know these are 1200watt amps, and all my 500-1200watt amps always put out 32v-48v on sine waves. I just can't believe these one only puts out 18v, my speaker load was 2ohms then I tried 1-ohm which dont know if thats a problem since its rated for .67ohm but highly doubt it.
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Old 15th March 2012, 06:26 PM   #10
m4ick is offline m4ick  United States
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That doesn't really sound like a defective 4080. If it was defective I don't think you would get the amp to power on for long without damaging more components or going into protect.

If you want more help diagnosing your amp you should post a new thread and describe your problem, someone will most likely chime in and help.
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