Amplifier Problem
Printed From: the12volt.com
Forum Name: Car Audio
Forum Discription: Car Stereos, Amplifiers, Crossovers, Processors, Speakers, Subwoofers, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=55073
Printed Date: May 22, 2024 at 8:23 PM
Topic: Amplifier Problem
Posted By: lasergrad2001
Subject: Amplifier Problem
Date Posted: May 03, 2005 at 7:53 PM
I have a question....I bought a Sony XM-D500X Mono Amplifier and installed it in my car. I bought it off of Techronics.com, and I'm sure it is new. I hooked it up to a Audiobahn 12" Flame Q Subwoofer and it worked for a couple of minutes, then just stopped. I looked on the amp and the Power Protector light wasn't on. I checked all the fuses and they were fine. With the car not running, I measured the voltage at the power terminal on the amp, and it measured a little over 12V. I then started the car and measured the voltage at the power terminal and it measured 3V. I also measured the voltage at the Remote turn-on with the car running, and it measured a little under 2V. I contacted Sony and they said to disconnect the amp and let it sit for 15 minutes to allow the amp to "reset" itself. I did that, and it still doesn't work. I just want to make sure that there isn't anything else I should do/check before I send it in for repairs....(Techronics.com doesn't do product exchanges, which really sucks) BTW....I would advise to stay away from Techronics.com. I have heard that they aren't the best people to deal with, but thought I would give them a shot.....guess I'm paying for it now. Any advise would be greatly appreciated. Thanks
Replies:
Posted By: haemphyst
Date Posted: May 03, 2005 at 9:08 PM
And people wonder why it costs a little more to buy their stuff at a brick-and-mortar...
The amp is fried... Are your woofers DVC? Are they all in parallel? For a net load of one ohm? Is the amp one ohm stable? Sony, I'd bet not...
I'll hazard some answers to those questions... Yes, Yes, Yes, No...
How'm I doin'? Sorry, man, the amp needs to go back to Sony, but I bet you won't buy anything online again soon, right? Also, make certain you have adequate power cable for your amp... Crutchfied claims it needs a number 4 power cable and ground. It can't hurt to have a cable that big, but I don't believe that amp would EVER use a #4 cable...
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It all reminds me of something that Molière once said to Guy de Maupassant at a café in Vienna: "That's nice. You should write it down."
Posted By: lasergrad2001
Date Posted: May 03, 2005 at 9:22 PM
To answer your questions....the sub is a Dual 4 Ohm voice coil, it is wired in parallel....which would be a net load of 2 Ohms....and yes the Amp is 2 Ohm stable. The amp is said to put out 500W RMS at a 2 Ohm load. The sub can handle 1100W RMS. I have Street Wires 4 Gauge wiring for both the Power and Ground cables, along with an 80A fuse (the amp itself has 2 40 amp fuses). Here is something else that I found on this site...I found another post from around 2 years ago (Sony Amp Question?...posted by underground) He said that he was still showing 13V when he used a DMM to test the voltage on the amp after it had been sitting for 2 days. Well.....I thought I would see what would happen when I tried it. My amp has been disconnected for over 2 hours, and it is still showing 12V across the Power terminal. I'm guess that the amp is completely toast. If anyone else has anything to add, please feel free. I would like as much advise as possible. Thanks.
Posted By: haemphyst
Date Posted: May 03, 2005 at 9:27 PM
Sorry man, I did not read your post accurately  ... I did not see you only had one woofer, I assumed you had two.
Still, the amp sounds to me like you could put butter on it, and enjoy it with a glass of OJ in the morning... Atkins friendly, BTW 
I would still say it's Sony bound for repair. ------------- It all reminds me of something that Molière once said to Guy de Maupassant at a café in Vienna: "That's nice. You should write it down."
Posted By: lasergrad2001
Date Posted: May 03, 2005 at 9:35 PM
It's cool , I figured you thought I had two. I wish I could have two...but my Dodge Neon wouldn't have much of a trunk left.....the one ported box takes up plenty of space. I appreciate your help. I'm waiting on an RMA from Techronics.com so I can send it back to them.
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