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New B4 active crossover
New B4 active crossover
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Old 28th May 2014, 10:06 PM   #1
Nelson Pass is offline Nelson Pass  United States
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New B4 active crossover
Default New B4 active crossover

The owner's manual to the newly revised B4 active crossover is posted on the First Watt site.

www.firstwatt.com/pdf/prod_b4_man.pdf

It's been two years getting the revisions out, and not that I thought you would
buy one, rather that you might enjoy the pretty curves and witty commentary.

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Old 28th May 2014, 10:08 PM   #2
Zen Mod is offline Zen Mod  Serbia
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New B4 active crossover
Quote:
Originally Posted by Nelson Pass View Post
.... witty commentary.
..
that's the part I'm enjoying most

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Old 28th May 2014, 10:40 PM   #3
Zero D is offline Zero D  United Kingdom
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@ Nelson Pass

Shame, if it went from 24Hz - 6276 Hz i might consider one

Quote:
Each of the four filters offers 1, 2, 3 or 4 “poles” for each filter, corresponding to 6, 12, 18 or 24dB/octave slopes. Each of these filter poles is independently adjustable within each filter, allowing wide customization of the character of the filter.
That's as it should be If only more products had done that in the past !

I'm surprised you're using a SM PS though ?
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Old 29th May 2014, 02:02 AM   #4
Nelson Pass is offline Nelson Pass  United States
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New B4 active crossover
The XVR1 is similar, and offers balanced lines, but costs more than twice.

Nice shiny separate supply and four knobs, though.

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Old 29th May 2014, 02:39 AM   #5
edwyun is offline edwyun  United States
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Thank you. Can't wait.
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Old 29th May 2014, 02:09 PM   #6
Zero D is offline Zero D  United Kingdom
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Hi, i couldn't see XVR1 on your www ?
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Old 29th May 2014, 03:06 PM   #7
Nelson Pass is offline Nelson Pass  United States
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New B4 active crossover
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@ Nelson Pass

Hi, i couldn't see XVR1 on your www ?
www.passlabs.com and then under products and then preamps and then
"specialty"

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Old 29th May 2014, 07:53 PM   #8
Zero D is offline Zero D  United Kingdom
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Ahh, i was looking @ FIRST WATT that's why i didn't see it

Thanx
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Old 31st May 2014, 10:23 AM   #9
Michael Rothacher is offline Michael Rothacher  United States
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New B4 active crossover
Really great stuff! Always fun to read a Pass owner manual
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Old 13th June 2014, 04:25 AM   #10
edwyun is offline edwyun  United States
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Quote:
They have a common input, and an input switch on the left decides which filter will have level attenuation. The other filter will see the direct input.
Quote:
The high pass filter and the low pass filter are each independently buffered from the input
and the input attenuator. This assures that the attenuator and the impedance of the signal
source do not influence the performance of the filters.
Thank you. This is a welcome update.

Quote:
The L setting is provided to switch a capacitor on each filter so as to implement a “Linkwitz-Riley” value set when you are using 24 dB/octave setting
So the new B4 can create a LR4 crossover. Is there a way to create a LR2 crossover?

Last edited by edwyun; 13th June 2014 at 04:33 AM.
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