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Old 9th March 2002, 05:10 AM   #1
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Default Pass Labs XVR1 crossover

For those interested in crossovers, the XVR1 crossover is now listed on the Pass Labs website. Go to Products and scroll down nearly to the bottom; it's listed under the preamps. No data yet, but there's a description and pictures of the unit, both inside and out.

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Old 9th March 2002, 07:29 AM   #2
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Thanks Grey, I'm going there now....
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Old 11th March 2002, 05:39 PM   #3
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The first run of XVR's is in production and will ship at the
end of the month. Lots of information will be out soon,
as I am having to essentially write a book for the owner's
manual, and we'll be putting it up on the site.

I've been working on this piece for almost 3 years, and
I believe the results are pretty spectacular.
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Old 16th March 2002, 01:40 PM   #4
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Location: Cleveland ohio
With great anticipation, I have been awaiting the High/Low Pass
electronic crossover. This crossover is talked about on the Pass DIY site. Will the high/low Pass electronic crossover be similar to the new Pass XVR?

Anybody know when the High/Low Pass is going to debut on the Pass DIY site?
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Old 16th March 2002, 07:27 PM   #5
Apogee is offline Apogee  United States
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The piece looks beautiful! It will be nice to have a decent crossover available...

I've been a lurker for quite some time and this is my first post...

Thanks to Nelson for his generosity and patience with those of us out there attempting to tackle aspects of this stuff ourselves... Thanks for never losing the love of the hobby!

I currently own Threshold equipment and now am eyeing the X-1 as a replacement preamp for my next step... It will take a while to get there but it will be well worth the wait...

Thanks also to the other members for their constant help and advice!!

I have a question regarding the circuit design of this unit. On the Pass site it mentions "The discrete circuitry for every stage consists of matched low noise JFETs driving bipolar output transistors, all biased single-ended with constant current sources." Why the departure from Mosfets in the output stage?

Thanks and again, beautiful work!

Steve Majerick
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Old 18th March 2002, 10:47 PM   #6
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In this particular circuit with very low gain,
the bipolar outputs worked better.

The high/low pass project will have a vague similarity,
but is not far enough along to say for certain.

In the meantime, parts 2a, b, and c of the Zen
Variations is almost done, with an ETA of April 1,
and the Claw is a large pile of wood.
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Old 6th May 2002, 04:05 AM   #7
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The manual for the crossover has been posted on the Pass Labs site.
They'll be publishing a <i>Crossovers For Dummies</i> book in the near future for those who are unable to cope with the psychic trauma induced by having to think for themselves...
The poor darlings will be forced to choose between Low, Medium, and High Q (the manual doesn't specify, but I'm guessing .5, .707, and 1), in addition to crossover points (a bakers' dozen, not counting multipliers), slopes (1st, 2nd, 3rd, and 4th order), and levels. The only thing it doesn't have is infinitely variable phase, but that doesn't implement well in the real world short of manipulating things in the digital domain (yuk).
Interesting reading. If you keep your wits about you, certain deductions can be made about the circuit.
Looks like a fun toy.

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Old 6th May 2002, 07:48 PM   #8
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I think one of the most interesting features is the
ability to independently adjust the frequency of
each pole.

By the way, the simplified schematic is part of the manual.
The capacitors are equal value, and the Q gain figures
are 0, 3 dB, and 6 dB.
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Old 7th May 2002, 01:27 AM   #9
TJ is offline TJ
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Location: UK
As i know Mr Pass previous design ... less is more ... and i always keep in my mind ..... but now i'm curious ! xo can brighten our life ? ...... !
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Old 7th May 2002, 06:34 PM   #10
Join Date: Feb 2002
Location: Dallas,Texas
Talking Way cool

I wish I could afford one! Biamping is the way to go. Maybe the neatest product from Pass Labs yet and sure to become a classic.
Need any Beta testers?

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