Question about JBL GTO 75.4II Multi-Channel Amp Car Audio Amplifier

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I have 75.4 and have a pioneer 307 (Dual 2 ohm) bridged on 2ch. The AMP trips on low freqs. reason? would it be better to hook it up on a single channel rather then bridge?

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Yes

Posted on Sep 27, 2011

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1 Answer

Total Power Bridged in 2 or 4 Ohms ?


Nice amp the specs say the following:
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But.... it tends to go into protection quite fast so i wouldn't go too low with speaker impedance.

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I classify this as a sleeper of the car audio industry. it is powerful, well built, cheap, feature laden, sounds great! very comparible to the big names such as kicker, alpine, fosgate an all the rest. i would prefer this amp over any of them any day of the week! here are the specs for it incase u didn't have them.
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Ive got a 5channel zeus z7oo & im hooking up


if i were you i would put the switch to 4ch and the run one sub from ch1-2 bridged and then ch3-4 bridged. I would have to bet this amp is stable only to 4 ohms bridged with so many channels

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Kickers shut off


Has nothing to do with the sub's . This is an AMP problem. Best guess is you are running at too low of an impedance. Most likely (sight unseen) you are running a 2ch AMP @ 2 ohms bridged, or if the sub's Dual voice coil you are @ 1 ohm, and most amps frown on that.

Give me some specs..

Amp make, and model.
And EXACT model # of the sub's. Give me this info, and I will tell you how to make it work.

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I have 1000 watt sony XPLOD amp and i just installed it today. with new monster cable&ground. the green light turns on& thumping goes for a little. i try to raise up just a little bit& after 2...


it isnt getting enough power and its tripping the internal switch on the amp and putting it in safe mode. either your wire isnt a high enough gauge. you might need a capacitor or you need bigger wire.

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Ccan it be bridged with a 5 ohm subwoofer?


Hello cameron_cran,

The information I found on the amp is that is a 2-channel and is bridgeable. It is stable in bridged mode to 4 ohms. You should be able to bridge a single 4 ohm sub without damage to the amp.

Hope this helps.

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dual 2 or dual 4

dual 2 wire vc's in series for a 4 ohm load each. Hook each speaker seperate channels on the amp.

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dual 4 wire vc in parallel for a 2 ohm load each and hook each speaker to seperate channels on the amp.

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1 Answer

Problem with LEGACY BLUE DIAMOND AMPLIFIERS LA1080


never attemp to bridge your amps specially this type of amps. this are too very complicated. you may blow your amp if you will attempt it again.

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