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SOLD: Pass Labs XVR-1 Active Crossover

S

Substance

Well-known member
⭐️⭐️PATRON⭐️⭐️
I have one of these in near brand new condition for sale. I bought it a few years ago to experiment with my electrostats and maybe put 20-30 hours total. Past 4 years, its been in storage. I have the original box (even the double shipping box from the factory), all content, all notes, and papers included. I believe it is now discontinued and very rare in the used market.

It is by far the best active crossover ever made with pure class A design by the legendary Nelson Pass. It comes with it own linear power supply on a separate chassis. I am looking to get $4,000 for it. Located in the Orange County, California. I will update with more info and pictures soon.


XVR-1 - Pass Labs

XVR1’s have been created over a period of several years for our own loudspeaker design efforts, and it is the design that ultimately performed with the most flexibility and quality, and gave us the most satisfaction with the end result.
www.passlabs.com
 
Is the unit still for sale? Do you know where I might find a 2nd unit as I may want to implement a 3 way crossover.
 
It is for sale. From what I understand they made these to order or in extremely small batches. It was difficult to find one even during its production. If you go to DIY forums that Nelson Pass contributed, he talked about this product a lot during its development. This crossover was originally made for the original Rushmore speakers and Nelson decided to sell additional stand alone unit due to high demand. Try reaching out to the manufacturer? They might make a second unit for you.

What kind of speakers do you have?
 
I already checked with Nelson, he doesn’t have any left and is not longer making them. I have TAD R1s. Andrew Jones, the designer, has been helping with tri-amping them, primarily focused on DSP crossovers. But alternatively we could potentially use an XVR1 to divide the signal between the woofer and the coax, and use a custom two way passive crossover just for the coax. Could I put a hold on this for a few days while I check with Andrew on whether we can use the XVR1?
 
Check with Andrew. I am curious what he thinks as well.

I am an ECE but not a speaker designer. Certainly not in the same experience level as Andrew. From my understanding, the active crossover is the only way to split your amps therefore splitting the energy in the analog domain without a/d and d/a conversations in the chain. This is a super clean class A design so it’s super transparent too.

From my calculations, if you take a 20 to 20k signal and split them at around 360Hz, the amount of energy between the two are equal. You can use matching amps and quadruple their headroom for the transients. Like Andrew said, you can use a passive LC circuits for the higher octaves as at these frequencies, you are dealing with much lower energy and they are more forgiving on the phase shift and alike issues unlike the bass region.

I looked into Bryston, JL Audio and a few others. Nothing came close to the Pass one. I would definitely ignore the digital crossovers except only in the lowest octave region and only for a low pass.

let me know what you find out. I just listed this a few days ago. If anyone else reaches out, I will keep it on hold until you decide.
 
Andrew feels this is the optimal solution. I’ve never purchased anything on this forum, please advise on next steps. Consider it sold. Thanks.
 
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