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#46966 - 06/23/03 09:13 PM Re: .1 LFE and crossover selection
Kevin C Brown Offline
Desperado

Registered: 12/11/01
Posts: 1054
Loc: Santa Clara, CA
Here's the way that it *should* be (according to me ): the LFE for the 6 ch bypass should be sent through full range. Most subs have a crossover applicable to the input anyway. But I bet that if the 80 Hz crossover is engaged, that then the LFE channel is low passed at 80 Hz too.
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#46967 - 06/25/03 02:50 AM Re: .1 LFE and crossover selection
The Hun Offline
Gunslinger

Registered: 03/14/03
Posts: 59
Loc: Riverside
Bosso,
I haven't tried your "theory" but if it's right then the 950 falls into the chategory that Brian Florian explained in his now "infamous" article about variable crossover designs,and Scott has some explaining to do.

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#46968 - 06/25/03 10:14 PM Re: .1 LFE and crossover selection
Kevin C Brown Offline
Desperado

Registered: 12/11/01
Posts: 1054
Loc: Santa Clara, CA
Hun- Not really.

The Secrets article has to do with the digital crossovers. In fact, in a recent thread Scott addressed this again, in that the Cirrus chip theoretically does do the digital crossing over correctly.

This is regarding what happens with the analog inputs. But most pre/pros have no BM on the analog inputs!
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#46969 - 07/09/03 01:08 AM Re: .1 LFE and crossover selection
The Hun Offline
Gunslinger

Registered: 03/14/03
Posts: 59
Loc: Riverside
The author was asking about the digital BM in the 950.
Bosso claims that you would loose content from the LFE channel if you select 40hz or so for the mains,Scott said otherwise in a different thread.That is what I was respomding to.
The analog 6ch input is a global 80hz low/highpass filter,we all know that.

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#46970 - 07/10/03 02:07 AM Re: .1 LFE and crossover selection
Kevin C Brown Offline
Desperado

Registered: 12/11/01
Posts: 1054
Loc: Santa Clara, CA
Quote:
Bosso claims that you would loose content from the LFE channel if you select 40hz or so for the mains, Scott said otherwise in a different thread.


Can you dig up that thread? I only ever remember Scott commenting on the digital crossover.
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#46971 - 07/10/03 11:08 AM Re: .1 LFE and crossover selection
DollarBill Offline
Gunslinger

Registered: 06/17/02
Posts: 180
Loc: Durham, CT
Quote:
Originally posted by The Hun:
The analog 6ch input is a global 80hz low/highpass filter,we all know that.


I'm not sure I understand this, Hun. The subwoofer channel has a 120 Hz LPF, not 80. The other channels are 80 Hz high pass or full range depending on the position of the switch. Have you found this to be different?

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#46972 - 07/10/03 08:02 PM Re: .1 LFE and crossover selection
bossobass Offline
Desperado

Registered: 08/19/02
Posts: 430
Loc: charlotte, nc usa
KCB: I recall Scott's post as referring to the analog BM. It was a question of whether or not the 950's global LFE LP was the same as the ICBM (which is said to be 150 Hz.).

I recently asked someone if the 45A has a global LP on the LFE and he said it does, @ 100 Hz. So, what happens if the player's fixed LP is 100 Hz. (or, as in Sony players, 120 Hz.) and it sends that filtered signal to the 950's 120 Hz. filter?

Since both filters are fixed, could this be the answer to the phase problem, when switching to 6CH BYPASS?

Things that make you go...Hmmmmmmmmmmm.
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#46973 - 07/11/03 02:43 AM Re: .1 LFE and crossover selection
Kevin C Brown Offline
Desperado

Registered: 12/11/01
Posts: 1054
Loc: Santa Clara, CA
BoB- Ahhh, maybe.

Because digitally, the LFE would have no filtering in the 45a. Any filter always adds a phase shift.

Ahh, but I can test that now. I have the MC-8 and am running full range everywhere, so I should *still* have that phase shift then. I'll check for it this weekend.

But Hun was talking about a 40 Hz crossover, which can't happen with the analog inputs. Maybe I'm confusing myself...
_________________________
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KevinVision 7.1 ... New and Improved !!


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#46974 - 07/13/03 10:48 PM Re: .1 LFE and crossover selection
Kevin C Brown Offline
Desperado

Registered: 12/11/01
Posts: 1054
Loc: Santa Clara, CA
Ahh, actually don't even have to test for it. The 1st test I spotted this with was a discrete test tone CD. 2 ch. So any LFE filter in the Pioneer wasn't even in the loop. Has the be the difference between the digital and analog crossovers in the 950.
_________________________
If it's not worth waiting until the last minute to do, then it's not worth doing.

KevinVision 7.1 ... New and Improved !!


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#46975 - 07/17/03 02:14 AM Re: .1 LFE and crossover selection
bossobass Offline
Desperado

Registered: 08/19/02
Posts: 430
Loc: charlotte, nc usa
Quote:
Originally posted by Kevin C Brown:
Ahh, actually don't even have to test for it. The 1st test I spotted this with was a discrete test tone CD. 2 ch. So any LFE filter in the Pioneer wasn't even in the loop. Has the be the difference between the digital and analog crossovers in the 950.


KCB: How did you spot it with a 2 ch discrete test tone CD?
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