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Amplifiers
MB quart REF1.800 clamped
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<blockquote data-quote="AStovall" data-source="post: 7655156" data-attributes="member: 639368"><p>I got this amp off ebay for $112 shipped</p><p></p><p>the amp is rated at 300 @ 4 ohms with 14v 650 @ 2 ohms @14v and 800 @ 1 ohm a 14v.</p><p></p><p>This was done in a 06 cobalt with no electrical upgrades ,note the battery's factory location is in the trunk. voltage was noted at 14.3v with the car idling. voltage dropped to 13.7-13.4 during burps. The gain on the amp was set to max. volume was adjusted at the deck until clipping was observed at the amplifiers output.</p><p></p><p>voltage at idle. Ignore the amp meter.</p><p></p><p><img src="http://img.photobucket.com/albums/v640/redzx2/20120227_133509.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p></p><p>voltage at speaker terms at the amp 34.6v the load was 2 MTX 4500's wired to 2 ohm.</p><p></p><p>At 40Hz .</p><p></p><p><img src="http://img.photobucket.com/albums/v640/redzx2/20120227_133455.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p></p><p><img src="http://img.photobucket.com/albums/v640/redzx2/20120227_133501.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p></p><p>34.6 x 13.1 =453.7 watts RMS @ 2.641 ohms</p><p></p><p>(If you take 34.6v and put it into an even 2ohm load the math comes out to 598 watts. )</p><p></p><p>I tried this at 1 Ohm using resistors. I also did this with the car off and at 48hz the amp started to make an audible hiss from the chassis as the signal began to clip so i stopped i may try again at a lower freq with the car running i didn't have time play with the setup today(lunch break ended)</p><p></p><p><img src="http://img.photobucket.com/albums/v640/redzx2/20120227_123350.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p></p><p><img src="http://img.photobucket.com/albums/v640/redzx2/20120227_123032.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p></p><p><img src="http://img.photobucket.com/albums/v640/redzx2/20120227_123343.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p></p><p>22.8v x 25.1A = 572 watts rms @.908 ohms... i think this may be due to the voltage drop with the car not running, that or the amp just cant do rated power at 1 ohm.</p></blockquote><p></p>
[QUOTE="AStovall, post: 7655156, member: 639368"] I got this amp off ebay for $112 shipped the amp is rated at 300 @ 4 ohms with 14v 650 @ 2 ohms @14v and 800 @ 1 ohm a 14v. This was done in a 06 cobalt with no electrical upgrades ,note the battery's factory location is in the trunk. voltage was noted at 14.3v with the car idling. voltage dropped to 13.7-13.4 during burps. The gain on the amp was set to max. volume was adjusted at the deck until clipping was observed at the amplifiers output. voltage at idle. Ignore the amp meter. [IMG]http://img.photobucket.com/albums/v640/redzx2/20120227_133509.jpg[/IMG] voltage at speaker terms at the amp 34.6v the load was 2 MTX 4500's wired to 2 ohm. At 40Hz . [IMG]http://img.photobucket.com/albums/v640/redzx2/20120227_133455.jpg[/IMG] [IMG]http://img.photobucket.com/albums/v640/redzx2/20120227_133501.jpg[/IMG] 34.6 x 13.1 =453.7 watts RMS @ 2.641 ohms (If you take 34.6v and put it into an even 2ohm load the math comes out to 598 watts. ) I tried this at 1 Ohm using resistors. I also did this with the car off and at 48hz the amp started to make an audible hiss from the chassis as the signal began to clip so i stopped i may try again at a lower freq with the car running i didn't have time play with the setup today(lunch break ended) [IMG]http://img.photobucket.com/albums/v640/redzx2/20120227_123350.jpg[/IMG] [IMG]http://img.photobucket.com/albums/v640/redzx2/20120227_123032.jpg[/IMG] [IMG]http://img.photobucket.com/albums/v640/redzx2/20120227_123343.jpg[/IMG] 22.8v x 25.1A = 572 watts rms @.908 ohms... i think this may be due to the voltage drop with the car not running, that or the amp just cant do rated power at 1 ohm. [/QUOTE]
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Amplifiers
MB quart REF1.800 clamped
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