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#1709166 - 09/22/09 11:27 PM

Amp in protect mode! help

specv
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Registered: 09/22/09
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I have an older sony amp that goes in protect when i put it on the low pass filter. when i turn the filter off or on high pass it works fine. can anyone tell me how to fix this?

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#1712757 - 09/30/09 07:57 PM

Re: Amp in protect mode! help [Re: specv]

keep_hope_alive
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oohh, sounds like the unit itself is bad. old amps tend to fail, Sony is no exception.

most likely, it's less than $5 in parts. good luck finding someone to actually do the work though.

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#1712758 - 09/30/09 07:57 PM

Re: Amp in protect mode! help [Re: keep_hope_alive]

keep_hope_alive
in another life, i'm a serial killer
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in the meantime, you can use a passive sub crossover.

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#1715073 - 10/06/09 10:28 PM

Re: Amp in protect mode! help [Re: keep_hope_alive]

specv
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Registered: 09/22/09
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what you mean by that?

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#1715078 - 10/07/09 12:04 AM

Re: Amp in protect mode! help [Re: specv]

keep_hope_alive
in another life, i'm a serial killer
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Loc: Quad Cities, IL

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you can leave the amp on high pass so it works. then install a low pass filter between the amp and sub.

http://www.parts-express.com/pe/showdetl.cfm?Partnumber=266-444

you didn't say what exact model amp and what model sub(s). how is it wired and what is the impedance?

something like the link above is a passive low pass filter - 100Hz low pass for a 4 ohm load.

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#1722687 - 10/21/09 08:54 PM

Re: Amp in protect mode! help [Re: keep_hope_alive]

specv
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Registered: 09/22/09
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the model is Sony Xplod XM 2165GTX silver with a red x. but how would that filter work with the amp? is it safe

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#1722691 - 10/21/09 09:09 PM

Re: Amp in protect mode! help [Re: specv]

highend64
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The filter that KHA suggested is a passive low-pass filter. The filter is place between the sub and amp.

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#1722693 - 10/21/09 09:14 PM

Re: Amp in protect mode! help [Re: highend64]

highend64
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You can also try this.

http://www.parts-express.com/pe/showdetl.cfm?Partnumber=266-252

You insert these at the amp RCA inputs. They provide a low pass crossover BEFORE the amp, much more efficient.

Edited by keep_hope_alive (10/22/09 12:07 AM)
Edit Reason: detail added

_________________________
88 Honda Accord

Alpine
CDM-9803
JBL P80.2 main amp
Alpine SPS-500 front speakers
Atomic AT-1500.1D sub amp
Diamond Audio 10" D3v1 in a 1.25 cu.ft. ported box
tuned to 33hz.

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