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Differences in SPL
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<blockquote data-quote="gunz4me" data-source="post: 5643093" data-attributes="member: 596464"><p>One of the common misnomers that most fail to recognize is that a Class D amp will draw just as many amps from the battery/alternator as most class ab amps. It may be a tad bit less when comparing 800 watt Class D to 800 watt Class AB, but a Class D will still **** down some juice at high volume. The efficiency part comes from what the Class D does with all that current that it is drinking at full tilt versus a Class AB amp. Also, at lower volumes, the switching power supply of the Class D allows it to draw less current than most Class AB amps.</p><p></p><p>Now, let me flip it.... A high voltage class AB amp, like the Linear Powers I posted above, can actually make more power while drawing less amperage from the alternator and battery than a Class D amplifier. I have a tiny little modified LP 150 in storage that produces 600 watts RMS @ 8 ohms mono off of 25 amps of fusing. The two amps above will produce 850 and 1100 watts RMS off of 60 amps of fusing @ 8 ohms mono. That kind of blows the whole "efficiency" thing of Class D out of the water, doesn't it? Regardless, I will take either one of those Linear Power 5002s @ 8 ohms over 99% of the 12 volt Class D amps that produce 1,000 watts RMS @ 2 ohms!</p><p></p><p>ETA: Most of the die hard old school audio nuts will agree that class AB sounds more musical on subwoofers than Class D. We also don't care to run our amplifiers @ 1 ohm mono either. Some of these young, whipper snappers just don't get it and never will<img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite11" alt=":rolleyes:" title="Roll eyes :rolleyes:" loading="lazy" data-shortname=":rolleyes:" /></p></blockquote><p></p>
[QUOTE="gunz4me, post: 5643093, member: 596464"] One of the common misnomers that most fail to recognize is that a Class D amp will draw just as many amps from the battery/alternator as most class ab amps. It may be a tad bit less when comparing 800 watt Class D to 800 watt Class AB, but a Class D will still **** down some juice at high volume. The efficiency part comes from what the Class D does with all that current that it is drinking at full tilt versus a Class AB amp. Also, at lower volumes, the switching power supply of the Class D allows it to draw less current than most Class AB amps. Now, let me flip it.... A high voltage class AB amp, like the Linear Powers I posted above, can actually make more power while drawing less amperage from the alternator and battery than a Class D amplifier. I have a tiny little modified LP 150 in storage that produces 600 watts RMS @ 8 ohms mono off of 25 amps of fusing. The two amps above will produce 850 and 1100 watts RMS off of 60 amps of fusing @ 8 ohms mono. That kind of blows the whole "efficiency" thing of Class D out of the water, doesn't it? Regardless, I will take either one of those Linear Power 5002s @ 8 ohms over 99% of the 12 volt Class D amps that produce 1,000 watts RMS @ 2 ohms! ETA: Most of the die hard old school audio nuts will agree that class AB sounds more musical on subwoofers than Class D. We also don't care to run our amplifiers @ 1 ohm mono either. Some of these young, whipper snappers just don't get it and never will:rolleyes: [/QUOTE]
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