aftermarket amp going into protection mode

Gadgetsystem · 08-17-2018, 09:00 PM

I have 2 American bass subwoofers hooked up to kicker cxa1800.1 and I'm using technicpnp harness. when I turn up the volume so it's loud the speakers cut out and go into protection mode and beat every couple seconds. I multimeter the battery and it was 12.75 and then I started the car and it was 14.75. I don't get why it's doing this the old amp I was using was a Kenwood KAC-9106D and I had no issues. I dont think my battery or alternator are bad is it the radio?

Emilime75 · 08-17-2018, 09:06 PM

Sounds like you're either asking too much from the amp, or the impedance load is too high. Either way, the amp doesn't like it and it's shutting down momentarily as a protection mechanism.

What impedance are the woofers? How many coils? How are they wired to the amplifier?

Gadgetsystem · 08-17-2018, 09:20 PM

I dont think im asking to much from the amp this is a bigger amp then the old one so i should have no issues. 2ohms 1,000 watts x1 and the amp is 1,800x1 for 2ohm mono

Emilime75 · 08-17-2018, 10:06 PM

If it's going into protection you are, or there's something wrong with the amp itself, possibly wiring. Your voltage appears ok, but a good, solid ground the same guage as your positive cable is needed.

The point here is that it's unlikely to be the radio or harness, unless potentially the line in voltage going to the amplifier is too high and that's causing it to go into protection...possible, but not likely.

Gadgetsystem · 08-17-2018, 10:25 PM

i think its the amp idk definitely not wiring

david in germany · 08-18-2018, 01:46 AM

How do you have the speakers wired? The amp is 2 ohm stable and if you have 2 4 ohm dvc woofers in parallel it would be a 1ohm load, too low for the amp. You didn't say what model subs you are running so I am only guessing.

Gadgetsystem · 08-18-2018, 07:34 AM

Quote:

Originally Posted by david in germany

How do you have the speakers wired? The amp is 2 ohm stable and if you have 2 4 ohm dvc woofers in parallel it would be a 1ohm load, too low for the amp. You didn't say what model subs you are running so I am only guessing.

Pretty sure I got them wired to 2 ohms 2 12 American bass xd

david in germany · 08-18-2018, 07:56 AM

What models are your subs? What voice coils are they?

08-17-2018, 09:00 PM	#1
Gadgetsystem Private 14 Rep 60 Posts Drives: Bmw 335i Join Date: Jul 2018 Location: Cleveland iTrader: (0)	aftermarket amp going into protection mode I have 2 American bass subwoofers hooked up to kicker cxa1800.1 and I'm using technicpnp harness. when I turn up the volume so it's loud the speakers cut out and go into protection mode and beat every couple seconds. I multimeter the battery and it was 12.75 and then I started the car and it was 14.75. I don't get why it's doing this the old amp I was using was a Kenwood KAC-9106D and I had no issues. I dont think my battery or alternator are bad is it the radio?
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08-17-2018, 09:06 PM	#2
Emilime75 Colonel 1209 Rep 2,476 Posts Drives: 2010 335i E92 LeMans Blue Join Date: Dec 2017 Location: Merica! iTrader: (1)	Sounds like you're either asking too much from the amp, or the impedance load is too high. Either way, the amp doesn't like it and it's shutting down momentarily as a protection mechanism. What impedance are the woofers? How many coils? How are they wired to the amplifier?
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08-17-2018, 09:20 PM	#3
Gadgetsystem Private 14 Rep 60 Posts Drives: Bmw 335i Join Date: Jul 2018 Location: Cleveland iTrader: (0)	I dont think im asking to much from the amp this is a bigger amp then the old one so i should have no issues. 2ohms 1,000 watts x1 and the amp is 1,800x1 for 2ohm mono
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08-17-2018, 10:06 PM	#4
Emilime75 Colonel 1209 Rep 2,476 Posts Drives: 2010 335i E92 LeMans Blue Join Date: Dec 2017 Location: Merica! iTrader: (1)	If it's going into protection you are, or there's something wrong with the amp itself, possibly wiring. Your voltage appears ok, but a good, solid ground the same guage as your positive cable is needed. The point here is that it's unlikely to be the radio or harness, unless potentially the line in voltage going to the amplifier is too high and that's causing it to go into protection...possible, but not likely.
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08-17-2018, 10:25 PM	#5
Gadgetsystem Private 14 Rep 60 Posts Drives: Bmw 335i Join Date: Jul 2018 Location: Cleveland iTrader: (0)	i think its the amp idk definitely not wiring
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08-18-2018, 01:46 AM	#6
david in germany Lieutenant Colonel 729 Rep 1,815 Posts Drives: 118i, 335i and 328i Join Date: Nov 2011 Location: Mannheim Germany iTrader: (2)	How do you have the speakers wired? The amp is 2 ohm stable and if you have 2 4 ohm dvc woofers in parallel it would be a 1ohm load, too low for the amp. You didn't say what model subs you are running so I am only guessing. __________________ 2009 118i Monaco Blue "Maximillion" 2009 335i Saphire Black M Sport "Leopold" Cobb stage 2 aggressive tune, Mishimoto FMIC, Cobb charge pipe, Cobb catted down pipes, Forge diverter valves, BMS inlets and DCI, Cyba scoops and M Individual Audio retrofit and M3 gauge cluster retrofit. 2011 328i Titan Silver M Sport "Franzel" <--Wife's car
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08-18-2018, 07:56 AM	#8
david in germany Lieutenant Colonel 729 Rep 1,815 Posts Drives: 118i, 335i and 328i Join Date: Nov 2011 Location: Mannheim Germany iTrader: (2)	What models are your subs? What voice coils are they? __________________ 2009 118i Monaco Blue "Maximillion" 2009 335i Saphire Black M Sport "Leopold" Cobb stage 2 aggressive tune, Mishimoto FMIC, Cobb charge pipe, Cobb catted down pipes, Forge diverter valves, BMS inlets and DCI, Cyba scoops and M Individual Audio retrofit and M3 gauge cluster retrofit. 2011 328i Titan Silver M Sport "Franzel" <--Wife's car
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