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Author Topic: Puzzled  (Read 5991 times)

Offline Len

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Re: Puzzled
« Reply #10 on: 17 April 2011, 18:44 »
Nah too busy driving the weekend or partying! :wink: :grin:

Yea I realise about frequency stuff, why the mid/tweets aint amped!
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Offline Len

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Re: Puzzled
« Reply #11 on: 18 April 2011, 13:06 »
Oh and I still dont know why my HU cuts out above volume position 20! :angry:
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Offline N900 MJT

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Re: Puzzled
« Reply #12 on: 18 April 2011, 15:29 »
If it cutting out over a certain level that sounds like the internal amp cant cope with the power needed - how old is this head unit?
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Offline Len

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Re: Puzzled
« Reply #13 on: 18 April 2011, 16:46 »
Not sure as I bought it S/H.

Its an Alpine CDA-7894RB with 4x60W int amp.
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Offline Len

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Re: Puzzled
« Reply #14 on: 22 April 2011, 14:27 »
Sub is working fine and swapping channels made no difference!

But its still cutting out above 20 on the volume setting! :angry:
Ran it at 20 for a while then moved it up one notch at a time. Lasted at 22 for a while so tried 23 and it cut out right away!
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Offline B-chi

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Re: Puzzled
« Reply #15 on: 23 April 2011, 20:00 »
It's not the outputs then. One down!

Have you another amp to try?

When it cuts out, does the hu turn off or the amp?
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Offline Snoopy

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Re: Puzzled
« Reply #16 on: 23 April 2011, 21:39 »
I lost off abit on page two but heres a thought.

Maybe you have damaged the voice coil/motor on the sub so its shorting at certain levels. (would explain the slamming of the boot kicked it into life :wink: )

Have you got an ohm meter handy. A multimeter that measures resistance.

If so disconnect the sub.
Wire the terminals of the sub upto your multimeter. + to +, - to - for example.
Set it so measure resistance.
slowly and evenly/gently near the centre of the sub at the sides of the dustcap Press the sub cone downwards slowly.
The resistance on the meter will change but it should not go really low or to zero. If it does then your sub is causing the system to cut off as its damaged.
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Offline Len

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Re: Puzzled
« Reply #17 on: 26 April 2011, 13:15 »
The HU cuts out! Then when you turn it down it comes back.


Yea have multimeter. So the sub speaker totally disconnected? OK will give it a try.
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Offline Len

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Re: Puzzled
« Reply #18 on: 26 April 2011, 13:17 »
Maybe test the system with the sub disconnected as well.

Oh I do have another amp, but its a really crap budget amp 4 channel, think its called Jackson. :embarassed:
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Offline B-chi

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Re: Puzzled
« Reply #19 on: 26 April 2011, 14:11 »
I wouldn't of thought the amp would be causing the HU to cut out.

Try running a new earth cable to the HU.
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