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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Sep 17, 2008 | 08:59 AM

#11

Hardwrkr

2000 Watt CAFz'r

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Posts: 3,542

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.

Sep 17, 2008 | 11:42 AM

#12

bart pyle

500 Watt CAFz'r

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Joined: Mar 2007

Posts: 967

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

Sep 17, 2008 | 12:20 PM

#13

Father Yuli

Thread Starter

Level 3 Supporter

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Joined: Oct 2000

Posts: 11,604

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; Sep 17, 2008 at 12:26 PM.

Sep 17, 2008 | 12:59 PM

#14

godzilla1978

50 Watt CAFz'r

Joined: 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.

Sep 17, 2008 | 01:00 PM

#15

AAAAAAA

2000 Watt CAFz'r

iTrader: (7)

Joined: Mar 2001

Posts: 2,010

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.

Sep 17, 2008 | 02:44 PM

#16

Dukk

Administrator

Joined: Feb 2006

Posts: 16,860

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

Sep 17, 2008 | 06:11 PM

#17

macguyver

50 Watt CAFz'r

Joined: 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.