Differences in SPL

[cleansoundzz 10+ year member]

Will 800 watts in class A/B give me the same thump and spl as 800 watts in class D in my subs?

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[PaulThompson229 10+ year member]

Class D is more efficent, A/B usually has better SQ, there are many other differences as well.

 

[squeak9798 5,000+ posts]

Will 800 watts in class A/B give me the same thump and spl as 800 watts in class D in my subs?

Why wouldn't it ? //content.invisioncic.com/y282845/emoticons/eyebrow.gif.fe2c18d8720fe8c7eaed347b21ea05a5.gif

 

[bunkerking09 10+ year member]

Hmmm...

It may not, but you probably couldn't tell the difference by ear.

 

[Vermithrax 10+ year member]

I don't believe the efficiency diff. would amount to enough diff. in power to ever notice.

 

[alvitae 10+ year member]

What's heavier? A pound of feathers or a pound of lead?

 

[Linkz 10+ year member]

What's heavier? A pound of feathers or a pound of lead?

x2

class D amps will also put less strain on your electrical.

 

[KyleBechtold 5,000+ posts]

What's heavier? A pound of feathers or a pound of lead?

how windy is it outside at the time? there are some factors to it.. but at 800 watts you couldn't tell either way

 

[badvlvo 10+ year member]

THe way it was explained to me is the nothing but a difference in efficiency reproducing a range of frequencies. a/b amps do better at high freq, d is better at low, regardless of wattage.

This could be wrong, it's second-hand information from an electronics engineer but we were both a little buzzed when we had this conversation.

 

[PaulThompson229 10+ year member]

THe way it was explained to me is the nothing but a difference in efficiency reproducing a range of frequencies. a/b amps do better at high freq, d is better at low, regardless of wattage. This could be wrong, it's second-hand information from an electronics engineer but we were both a little buzzed when we had this conversation.

I don't think thats right, many SQ subwoofer amps are class A/B

 

[Linkz 10+ year member]

I would say most of the difference is in the amount of distortion. There could be some coloring issues but I doubt it. A lot of home theater receivers use class D full range amps. One per a channel.

 

[goingdef 10+ year member]

fosgate uses class bd b for the sound output d the the power supply but with a 800 watt class ab you wont have enough time to tell if the output is the same because it will have over heated and gone into protect

 

[badvlvo 10+ year member]

I would say most of the difference is in the amount of distortion. There could be some coloring issues but I doubt it. A lot of home theater receivers use class D full range amps. One per a channel.

I think they can do that because of the power supply? I don't know but I would like to know.

 

[cleansoundzz 10+ year member]

So basically there are differences in efficiency both amps whether A/B or D are still going to give 800 clean watts of power to subwoofers? There will be differences in efficiency but still 800 clean watts?

 

[Linkz 10+ year member]

I think they can do that because of the power supply? I don't know but I would like to know.

Its all in the design TBH. Any amp design can sound great or terrible.

the 315wrms amp here can take massive swings in voltage from its supply and be fine afterward.

So basically there are differences in efficiency both amps whether A/B or D are still going to give 800 clean watts of power to subwoofers? There will be differences in efficiency but still 800 clean watts?

That would depend on the manufacture and how they rate their amps (.01%, .1%, 1% or 10% THD and supply voltage)

But generally two amps of different designs (as in a/b vs D) rated in the same way will be very similar.

The amp I was talking about above is rated for 315wrms@4ohms with 10%THD and 125wrms@8ohm with