Eclipse sw8122.4
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=23587
Printed Date: July 26, 2025 at 11:07 PM
Topic: Eclipse sw8122.4
Posted By: chan4202
Subject: Eclipse sw8122.4
Date Posted: December 30, 2003 at 12:05 AM
Is it needed to have a pair of these, or would one give enough bass to fill a suburban. It will have 500 clean watts to it ini a 1.25 cubic foot box, sealed?
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Chandler Martin
Replies:
Posted By: Durwood
Date Posted: December 30, 2003 at 12:18 AM
500 Watts to a single 12" sub is a pretty good amount. It would all depend on your expectations, though. I've been satisfied with less power than that, but I've never tried it in a Suburban. What amp are you using? If it's 2-ohm mono stable, you could always add a second identical sub later on if you weren't satisfied with the way it sounded with a single sub. 500 Watts RMS is already the limit for the sub you have, so you couldn't just keep the one sub and throw more power at it. Scott Gardner
Posted By: chan4202
Date Posted: December 30, 2003 at 12:37 AM
I have a rf 1001bd it is 1000watts rms at 2 ohms or 500 watts at 4ohms. I really dont like a huge amount of bass, just enough so that i know it is there. Are there acoustical benifits to having 2 woofers vs. one. Also if I used 2 woffers at 1000 rms watts, is this too much drain for my alternator, or would it be fine?
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Chandler Martin
Posted By: 97neon
Date Posted: December 30, 2003 at 1:04 AM
my friend has 4 12 inch power HX2's in a dodge Ram, and he is using the stock alternator, and he has an alpine MRV-1507 powering them, and has no strain on the alt or the battery's, although he does have 6 battereis, i would suggest a yellow top, but you should be fine, thats a big truck
Posted By: Durwood
Date Posted: December 30, 2003 at 1:20 AM
chan4202 wrote:
I have a rf 1001bd it is 1000watts rms at 2 ohms or 500 watts at 4ohms. I really dont like a huge amount of bass, just enough so that i know it is there. Are there acoustical benifits to having 2 woofers vs. one. Also if I used 2 woffers at 1000 rms watts, is this too much drain for my alternator, or would it be fine?
500 Watts and a single 12" subs will probably be fine. There are acoustical benefits to having a second sub when it comes to SPL. If you add the second sub and double the power, you'll get approximately another +6 dB of SPL. 3 dB of the gain is from doubling the input power, and the other 3 dB is from adding the second sub. To get the full benefit, you'll need to have the subs next to one another, and facing the same way. The 1001bd is a fairly efficient amp. I don't know how big your stock alternator is, but the max draw for the amp at full-tilt boogie (2 subs, 1000 watts) is a little over 100 amps. If you're not going to be playing it that loud constantly, and you have an alternator in the 135-amp range, you're probably fine. Scott Gardner
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