View Poll Results: Is this a class AB or class D amplifier?

This is an AB amp

55.00%

This is D class amp

35.00%

It's neither

I really can't tell

10.00%

Voters: 20. You may not vote on this poll

Am I a class AB or class D amp?

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09-17-2008, 08:59 AM

#11

Hardwrkr

2000 Watt CAFz'r

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Quote:

Originally Posted by ShaTR

just curious, why can't a single channel amp be an A/B??

There are lots of single channel class A/B amps.

09-17-2008, 11:42 AM

#12

bart pyle

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i think its an a/b amp, some would think its a d because its single channel and 2ohm stable but look at the fusing required to make 300watts......d class is more efficient

09-17-2008, 12:20 PM

#13

Father Yuli

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Quote:

Originally Posted by godzilla1978

If they showed the efficiency rating of the amp that would settle it. The size or power have very little to do with the class of amp. Class D amplifiers are much more efficient but very noisy(which is why their used for subs, can't hear the noise!)If kicker says it's A/B we should take their word for it.

but look at the THD. very high for a AB amp.

the amp has CEA rating of 150x1 at 4 ohm with 1% THD.

Last edited by Father Yuli; 09-17-2008 at 12:26 PM.

09-17-2008, 12:59 PM

#14

godzilla1978

50 Watt CAFz'r

Join Date: May 2007

Posts: 384

Quote:

Originally Posted by Father Yuli

but look at the THD. very high for a AB amp.

the amp has CEA rating of 150x1 at 4 ohm with 1% THD.

That's why the efficiency rating would tell us for sure. I agree 1% is pretty high but maybe cause it's mono they don't care.

09-17-2008, 01:00 PM

#15

AAAAAAA

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Amps advertised as CEA06 certified have to publish (or usually are) their specs at 1% distortion.

The frequency response is toped at 80hz, thats low for AB but I am sure that it is AB anyway.

09-17-2008, 02:44 PM

#16

Dukk

Administrator

Join Date: Feb 2006

Posts: 16,855

I agree that it's an AB amp but I ponder why in the world Kicker would cap it at 80hz.. At least Rockford's 300w mono AB amp is allowed to play full range: Rockford Fosgate® - P300-1

09-17-2008, 06:11 PM

#17

macguyver

50 Watt CAFz'r

Join Date: Aug 2008

Posts: 61

A class D and a class A/B amp can have the same number of output or power supply devices. The only thing that differentiates them is switching frequency. Class D is into the high kHz to MHz range, where class A/B is not.

At lower power levels, class D has no real benefits over class A/B, so no need to use those expensive FETs for class D.

You can't tell by the specs, but like said above, the effeciency would give it away. You have to go by the manufacturer on this one.