Wiring for Alpine KTP-445 - LotusTalk

jgran · 09-09-2009, 10:12 AM

This was touched on in another thread, but I don't think it was ever definitively answered.

I just purchased an Alpine KTP-445 4 channel amp. This amp plugs directly into the alpine wiring harness, and hopefully should be small enough to fit behind the dash. The issue is that it requires 15 amp power lead run to it. If I'm understanding correctly, the stock radio only has 7.5 going to it. One member said that they hooked it up to the wiper motor line which is switched and on a 15 amp fuse. This doesn't seem ideal to me. If you happened to turn on the wiper when you had the tunes cranked I would assume you could very easily blow the fuse.

So my question is, are there any other options?

jgran · 09-09-2009, 02:01 PM

I'm thinking of using a 12 Volt Relay to switch the power to the amp. Does anyone see any downside in doing it this way?

jgran · 09-10-2009, 09:36 AM

Ok, so I bought the following:

Parts-Express.com:12 VDC Tyco Relay SPDT 20/30A (Formerly Bosch) | spdt relay spdt sound security relays relay plastic mounting DC boss bosch relay 330-070 automotive relay automotive 12v bosch

Parts-Express.com:12 VDC 5-Pin Relay Socket | 12v 12 volt bosch alarm relay relay socket remote start starter kill

4 Circuit ATO/ATC Fuse Block

Depending on the work schedule, I plan to wire it up in the next week or so. This way I will have switched power for the amp, GPS, and Radar detector. I'll post photos as I go.

noel_audio · 10-16-2009, 07:20 AM

What would happen if you put inplace of the 7.5amp fuse a 15amp fuse?

09-09-2009, 10:12 AM	#1 (permalink)
jgran Registered User Join Date: Oct 2007 Posts: 19	Wiring for Alpine KTP-445 This was touched on in another thread, but I don't think it was ever definitively answered. I just purchased an Alpine KTP-445 4 channel amp. This amp plugs directly into the alpine wiring harness, and hopefully should be small enough to fit behind the dash. The issue is that it requires 15 amp power lead run to it. If I'm understanding correctly, the stock radio only has 7.5 going to it. One member said that they hooked it up to the wiper motor line which is switched and on a 15 amp fuse. This doesn't seem ideal to me. If you happened to turn on the wiper when you had the tunes cranked I would assume you could very easily blow the fuse. So my question is, are there any other options?

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09-09-2009, 02:01 PM	#2 (permalink)
jgran Registered User Join Date: Oct 2007 Posts: 19	I'm thinking of using a 12 Volt Relay to switch the power to the amp. Does anyone see any downside in doing it this way?

09-10-2009, 09:36 AM	#3 (permalink)
jgran Registered User Join Date: Oct 2007 Posts: 19	Ok, so I bought the following: Parts-Express.com:12 VDC Tyco Relay SPDT 20/30A (Formerly Bosch) \| spdt relay spdt sound security relays relay plastic mounting DC boss bosch relay 330-070 automotive relay automotive 12v bosch Parts-Express.com:12 VDC 5-Pin Relay Socket \| 12v 12 volt bosch alarm relay relay socket remote start starter kill 4 Circuit ATO/ATC Fuse Block Depending on the work schedule, I plan to wire it up in the next week or so. This way I will have switched power for the amp, GPS, and Radar detector. I'll post photos as I go.

10-16-2009, 07:20 AM	#4 (permalink)
noel_audio Registered User Join Date: Sep 2006 Location: Lawrence, KS Posts: 71	What would happen if you put inplace of the 7.5amp fuse a 15amp fuse?

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