Okay now you have me thinking.

Posted by Presto (A) on July 27, 2012 at 17:10:25

In Reply to: RE: Wouldn't that depend though? posted by Sumflow on July 27, 2012 at 13:42:15:

We've reduced the low frequency component of the signal. The peak voltage will go down, as will the RMS signal voltage. So in a way, by reducing the lowest frequencies, you could say we've also reduced the dynamic range of the SIGNAL. But we didn't change anything with the amp - it's max gain before clipping would remain the same.

So I guess if you reduce the RMS voltage of the signal with a highpass filter you have less "range" between the signal peaks and the RMS value. So if you reduce the peak voltage by 3db by removing bass signals, then you have 3db more to play with without any risk of clipping. BUT... with the bass removed you now have a smaller dynamic range of the amplified signal - aka - the signal will have a higher average POWER.

So, even though you might not clip the amp you might use up the amps thermal capacity quicker if you replace 3db worth of momentary bass signal with 3db worth of continuous "bass, midbass, mid and high" signal.

I think it would depend on the type of music, actually.

If you're talking electronic music with "bass beats" (current surges following voltage peaks) then I think you'd be looking at a more dramatic increase of average power dissipated when you use the "freed up headroom" for running only the full range signal.

Let me post some shots of waveforms for easier analysis. Woot woot.

Cheers,
Presto

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Follow Ups Full Thread

Topic - Does sending some frequencies to an active sub increase the watts available to the remaining speakers? - Sumflow 21:54:42 07/26/12 (32)

RE: Does sending some frequencies to an active sub increase the watts available to the remaining speakers? - djk 00:07:03 07/27/12 (31)

Wouldn't that depend though? - Presto 13:17:03 07/27/12 (20)

a big benefit of the high pass filter - hifitommy 11:28:23 07/28/12 (17)

RE: a big benefit of the high pass filter - Presto 13:12:09 08/01/12 (16)

my answer is more of an explanation - hifitommy 16:20:08 08/01/12 (15)

RE: my answer is more of an explanation - Presto 09:09:28 08/02/12 (14)

you're making this more complicated - hifitommy 16:05:01 08/02/12 (13)

RE: you're making this more complicated - Presto 00:59:34 08/03/12 (0)

Satellites? - Sumflow 20:59:10 08/02/12 (11)

Satellites - hifitommy 22:14:15 08/02/12 (10)

Satellite speakers - Sumflow 02:53:09 08/03/12 (0)

RE: Satellites - Sumflow 00:24:12 08/03/12 (8)

i reiterate---- - hifitommy 05:50:46 08/03/12 (7)

Hidden source - Sumflow 07:24:10 08/03/12 (6)

RE: Hidden source - abs1 14:28:15 08/03/12 (5)

Satellite - Sumflow 14:16:09 08/16/12 (2)

Joke - Sumflow 15:08:09 08/16/12 (0)

RE: Satellite - abs1 15:04:14 08/16/12 (0)

you guys are spot on about Summy - hifitommy 12:29:05 08/04/12 (0)

But...Sumflow had several pictures he had to post! - willkayakforfood 14:51:42 08/03/12 (0)

RE: Wouldn't that depend though? - Sumflow 13:42:15 07/27/12 (1)

Okay now you have me thinking. - Presto 17:10:25 07/27/12 (0)

the issue isn't the watts - Bruce from DC 10:50:05 07/27/12 (6)

RE: the issue is NEVER the watts - BigguyinATL 05:36:41 07/30/12 (0)

RE: the issue isn't the watts - Sumflow 14:53:42 07/27/12 (0)

And... - E-Stat 14:50:13 07/27/12 (3)

Clipping - Sumflow 20:16:04 07/27/12 (2)

RE: Clipping - b.l.zeebub 05:06:51 07/28/12 (0)

Those with - E-Stat 21:29:48 07/27/12 (0)

Theoretical numbers calulation - Sumflow 01:12:52 07/27/12 (2)

RE: Theoretical numbers calulation - djk 05:03:42 07/27/12 (1)

With a 100hz cut it would be more like 200W - Sumflow 05:08:34 07/27/12 (0)

Follow Ups

Okay now you have me thinking. - Presto 17:10:25 07/27/12 (0)

Okay now you have me thinking.

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