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Pass Labs B4 crossover questions
Pass Labs B4 crossover questions
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Old 8th July 2018, 05:19 PM   #421
savvas is online now savvas  Greece
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Just forget about it, get a Rane or something if you won't mind chips or otherwise a discrete buffer with slopes and get your active system going.
Later on when B4 is finally available and you feel like it, give it a try
In sort, move on, it's common place not keeping up with the schedule in DIY, other things happening etc.
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Old 8th July 2018, 07:23 PM   #422
tommydoan84 is offline tommydoan84  United States
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Pass Labs B4 crossover questions
Quote:
Originally Posted by savvas View Post
Just forget about it, get a Rane or something if you won't mind chips or otherwise a discrete buffer with slopes and get your active system going.
Later on when B4 is finally available and you feel like it, give it a try
In sort, move on, it's common place not keeping up with the schedule in DIY, other things happening etc.
Agreed on this one! Better yet, I highly recommend looking into DIY the JFET B1 crossover on this thread below. You can try a LR2 for 12db/oct or LR4 for 24db/oct version. I almost finished mine with P-P soldering. I had a switch to switch b/w 12db and 24db and multiple different Xover frequencies.

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B1 Active Crossover
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Old 8th July 2018, 07:52 PM   #423
Zen Mod is offline Zen Mod  Serbia
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Pass Labs B4 crossover questions
have you read newest Pa's article?

#418 , above
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Old 9th August 2018, 05:54 AM   #424
mbrennwa is offline mbrennwa  Switzerland
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Quote:
Originally Posted by tubesguy View Post
Need a little help here. I'm in Madison, WI, and I've been refreshing the page several times every hour since about June 8, but I'm running dangerously low on food, water, TP and the like. I really need to get out of the house today and restock (especially the TP) and I wonder if anyone local might be available to come over and hit the refresh button for me for just a couple of hours.
We have not heard from you for a while. Are you ok?
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Old 9th August 2018, 05:32 PM   #425
tubesguy is offline tubesguy  United States
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We have not heard from you for a while. Are you ok?
I'm fine, if a little poorer than before. It was taking so long for the Lxmini crossover to appear that I bought a pair of (used) Danley SH50s.

I still have an interest in the crossover, but, I confess, mainly to bolster the appeal of the Linkwitz speaker system to any prospective buyer. So I only refresh the store page about 10 times a day.
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Old 25th August 2018, 11:14 PM   #426
Studley is offline Studley  United Kingdom
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Originally Posted by EUVL View Post
Why not DIY (also for balanced) ?

Replace the tube buffer by a JFET one as in the LPF schematics, and you have essentially the same thing :

My differential active crossover
403 | Forbidden | University of Southampton

And for DIY, you have the choice of resistor and capacitor values for your exact requirement.
And no unnecessary DIP switch contacts in the signal path.

403 | Forbidden | University of Southampton


Patrick
The links above are now "forbidden" and searching doesn't lead anywhere. Can anybody point me to the right place, or an alternative?
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Old 25th August 2018, 11:38 PM   #427
Studley is offline Studley  United Kingdom
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Originally Posted by nzlowie View Post
Yea but all the minidsp products are digital based. If you feed it digital it processes the signal then has a DAC to output analogue, if you have an analogue input minidsp it first does ADC then proccess then DAC. So I see this as the limiting factor. Not a lot of point having a muilty thousands dollar DAC and then giving this signal to a couple of hundred dollar DAC.

Just my thoughts.
I think you are almost certainly correct; the weak link I believe, that you can't circumnavigate, is the SRC.
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Old 4th September 2018, 10:31 PM   #428
Studley is offline Studley  United Kingdom
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Originally Posted by Nelson Pass View Post
+/- 12V

How much current does the FW B4 draw?
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Old 5th September 2018, 12:53 PM   #429
mbrennwa is offline mbrennwa  Switzerland
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Originally Posted by Studley View Post
How much current does the FW B4 draw?
I believe the filter does not even exist so it does not draw any current at all. :-)
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Old 5th September 2018, 01:03 PM   #430
Zen Mod is offline Zen Mod  Serbia
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Pass Labs B4 crossover questions
see what's number of buffer cells , count roughly each drawing 10mA, multiply.
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