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Testing by Loyd Lowry.
results from the sundowns...
Test Vehicle.. mine.. 05 aveo..
RMS clamp and dmm, as seen in the 12" test session..
This testing includes recent results, and not so recent..
woofers used.. 2 Mags (1.9 dcr per coil), 2 FI Q 12's (1.4 dcr per coil)
either used 1 sub or both of the pair for loads..
pure 60hz sine was used to tested.. just under audible clipping
1 amp, single 1000ca everstart maxx, factory alt
4 ohm nominal = 518 watts @ 88% efficiency (voltage fell from 14.3v, to 14.0v)
2 ohm nominal = 948 watts @ 85% efficiency (voltage fell from 14.3v, to 13.6v)
1 ohm nominal = 1510 watts @ 78% efficiency (voltage fell from 14.3v, to 12.4 volts
.5 ohm nominal = 1615 watts @ 72% efficiency (voltage fell from 14.3v, to 11.8v)
.35 ohm nominal = 1748 watts @ 67% efficiency (voltage fell from 14.3v, to 11.4v)
amplifier was protection happy @ .35 with tones, and some music.
IMO.. one 1500d should be limited to 1 ohm nominal use in factory electrical systems.. for the sake of the car.. not the amp
now... to have fun with some juice..
1 amp, single 1000ca everstart maxx, 1 Eagle Picher 12a5000, factory alt
4 ohm nominal = 520 watts @ 88% efficiency (voltage fell from 14.3v, to 14.1v)
2 ohm nominal = 960 watts @ 84% efficiency (voltage fell from 14.3v, to 13.7v)
1 ohm nominal = 1635 watts @ 75% efficiency (voltage fell from 14.3v, to 12.8 volts
.5 ohm nominal = 1890 watts @ 71% efficiency (voltage fell from 14.3v, to 12.8v)
.35 ohm nominal = 2245 watts @ 65% efficiency (voltage fell from 14.3v, to 12.8v)
amplifier did fine @ .35 with tones and music with the added battery
2 amps strapped, with both batteries (for the sake of not typing it over and over... voltage drops from 14.3v, to 12.8 the entire test... lol
4 ohm strapped = 1900 watts @ 82% efficiency
2 ohm strapped = 3150 watts @ 72% efficiency
1 ohm strapped = 3740 watts @ 68% efficiency
.5 ohm strapped = 4425 watts @ 65% efficiency
.35 ohm strapped = 5415 watts @ 62% efficiency
amps would only tolerate a VERY short burp @ .35..
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HIGH VOLTAGE TESTING:
Testing by Sean Belanger
Here's the setup, a pair of Sundown Audio SAZ-1500d's strapped at 1 ohm.
In the box used in the test (a single Funkin Audio MF12, dual 2), rise went from 1 ohm to 2 ohms during play. Here are the results:
Notes:
* Highest power on 16.0v rest was 4663 watts on 14.3v
* Highest power on 16.5v rest was 5136 watts on 14.3v
* Highest power on 17.9v rest was 5677 watts on 15.5v
* 84% efficient on 15.0v and 180 amps of draw per amp
There was a 10% increase in power starting 0.5v higher with an ending voltage being the same. There was another 10% increase when starting at 1.4v higher and ending 1.2v higher. This would tell me that a lowest voltage over 16.5v likely wouldn't be much of a gain from below that.
No matter how ya look at it, tapping the 5700 mark on 15v isn't too shabby from a pair of 1500 watt amps.
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Regular and High Voltage Posts Consolidated on 10-23-08
Original "High Voltage Thread" Here:
http://www.soundsolutionsaudio.com/forum/i...?showtopic=7117
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