Bryston 10B Electronic Crossover Review

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James Tanner

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Bryston 10B Electronic Crossover Review
« on: 24 Feb 2008, 04:35 pm »
Hi All,

Please see below a ‘link’ to a very imformative review on the Bryston 10B Electronic Crossover from John Potis of sixmoons.com online magazine. The 10B is a very specialized product and I find this review provides a very detailed in-depth discussion on why quality electronic crossovers have a significant place in any state-of-the-art audio system.

http://www.6moons.com/audioreviews/bryston2/crossover.html

John’s Conclusion:
“I'm buying the Bryston 10B-Sub active crossover. It's one of the most significant things I've done for my system in terms of not only aiding the achievement of excellent deep bass quality but also in terms of alleviating the last remnants of listening fatigue. No matter what changes I'll make in the future, I'll never have to compromise here again. That makes the 10B a particularly good investment.”


John Potis
sixmoons.com

Crimson

Re: Bryston 10B Electronic Crossover Review
« Reply #1 on: 24 Feb 2008, 05:00 pm »
Congrats, James. I know I can't live without mine. In addition to using it with the Magnepan 3.6's, I've also used it with great success on a pair of Gallo Reference 3's in my family room which has inputs to drive the woofers' second set of voice coils. Some day I'll buy another.


marknoir

Re: Bryston 10B Electronic Crossover Review
« Reply #2 on: 16 Apr 2008, 11:32 pm »
Hi All,

Please see below a ‘link’ to a very imformative review on the Bryston 10B Electronic Crossover from John Potis of sixmoons.com online magazine. The 10B is a very specialized product and I find this review provides a very detailed in-depth discussion on why quality electronic crossovers have a significant place in any state-of-the-art audio system.

http://www.6moons.com/audioreviews/bryston2/crossover.html

John’s Conclusion:
“I'm buying the Bryston 10B-Sub active crossover. It's one of the most significant things I've done for my system in terms of not only aiding the achievement of excellent deep bass quality but also in terms of alleviating the last remnants of listening fatigue. No matter what changes I'll make in the future, I'll never have to compromise here again. That makes the 10B a particularly good investment.”


John Potis
sixmoons.com


Beg to differ. I have yet to hear a crossover which benefits would outweigh it's downfalls. I have tried many. Albeit, I could not afford the best digital ones, but all, without exeption, analog ones degrade the sound too much, IMHO. Bryston is probably the best of them all, but still...

If you read the review carefully, it states plain and simple, that no matter what slope you select, there is a phase shift. Bryston does not provide for that phase correction. Even the lowly Behringer does.

In my set-up, the differences between running bi-amp using built-in passive crossovers, and running bi-amp using active crossover, are dramatic, and ALWAYS not in favor of the active. I use modified Infinity 4.5 speakers (arguably one of the most accurate speakers ever built), and two Classe DR-9 amps. These Infinities have very advanced built-in passive crossovers, and with mods, they are even better. Introducing an active into the chain robs the sound of impact, dynamics, immediacy, detail etc. It's just "deader", and crossover's "signature" is unmistakable. After inserting Bryson 10B, my system began to sound like, well, Bryston. Again, of all analog crossovers that I have heard so far, it had the least impact, but this listener could not justify it's price tag. Perhaps I'm not alone, as they are for sale all over the place on a used market. Marchand is really very close, for a fraction of cost. And modified digital units from Behringer and others are, again IMHO, better.

The degradation in sound is more pronounced if your preamp is a high-end tube unit, like mine (MFA Luminescence). With solid-state electronics throughout there is less of effect.

Rgds, Marknoir

James Tanner

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Re: Bryston 10B Electronic Crossover Review
« Reply #3 on: 17 Apr 2008, 12:11 am »
I beg to differ

james

TomW16

Re: Bryston 10B Electronic Crossover Review
« Reply #4 on: 17 Apr 2008, 12:58 am »
Hi Marknoir,

I'm surprised that you prefer the sound of a passive crossover to an active one.  I've not been fortunate enough to afford the requisite number of amps required for an active crossover but the vast majority of impressions that I've read (I can't recall any negitive comments before yours) prefered the active crossover.  So why aren't active crossovers more popular?  Well, there is the cost of the crossover itself and then the cost of the additional amplifiers...  But you save the cost of the passive crossover parts.  Unfortuntely, the crossover parts are relatively inexpensive (unless there are boutique parts in the crossover) compared to the cost of the electronics.

I'm pretty happy with my passive speaker crossovers unless I had the requisite funds to go active  :lol:

Cheers,
Tom


Phil A

Re: Bryston 10B Electronic Crossover Review
« Reply #5 on: 17 Apr 2008, 02:34 pm »
I've owned many set-ups over the years (and I wish I had some of the equipment back I sold) and have had subwoofers in my systems many moons before home theater was even around (not to mention subs in cars long before they were popular).  I've owned all kinds of crossovers going back over 20 yrs. (since I was 9 :wink:), from Dahlquist's sub and electronic crossover to all kinds of things (I had friends in the audio industry who made and had access to numerous things and while one friend worked at a high end shop for a 5 yr. period I did virtually all his set-ups with him of many things) and I've personally yet to hear a passive crossover that does a good job in the way something like a Bryston or Marchand can.

mfsoa

Re: Bryston 10B Electronic Crossover Review
« Reply #6 on: 17 Apr 2008, 02:46 pm »
Marknoir,

Just wondering if you were using the active crossover AND the passive crossovers at the same time?

Wouldn't it be best to compare active without the passive crossovers vs. just the passives? Maybe that's exactly what you did.

Just trying to understand what's going on. I have never used an active before but I don't see any reason why a properly set-up, quality active - that allows for the complete removal of the passive crossover - would necessarily be inferior to the passive alone.

Thanks

-Mike

woodsyi

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Re: Bryston 10B Electronic Crossover Review
« Reply #7 on: 17 Apr 2008, 02:47 pm »
I prefer active over passive crossover, especially at the lower frequencies (since it takes big caps for low poles).   

FM Acoustics

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Re: Bryston 10B Electronic Crossover Review
« Reply #8 on: 18 Apr 2008, 12:10 pm »
Beg to differ....

Like Mike asked: did you disconnect the passive crossovers? The point of active crossovers is to connect the amplifiers directly to the loudspeaker drivers.

I don't think a digital crossover would be better than a good phase coherent analog design. Once, because it will lower the resolution if you listen to 16 bit material (with 24 bit should be ok) and because there is involved a lossy A/D/A process. Even if you feed directly a digital signal to the crossover you would have to control the volume in the digital domain and you are stuck with the DACs from the crossover.

Did you had the chance to also listen to the Pass XVR1 active crossover? This is supposed to be a phase coherent crossover. Check the manual, it has solid theory in it.

http://www.passlabs.com/pdf/old%20product%20manuals/xvr1_om.pdf

Viola and FM Acoustics also make nice analog crossovers but they are hideously expensive. The Bryston is a good value and should sound very good when properly set up.
http://www.violalabs.com/quartet.html
http://www.fmacoustics.com/set_domestic.html

You might want to also check this article on the benefits of active bi-amplification if you haven't already:
http://sound.westhost.com/bi-amp.htm
http://sound.westhost.com/bi-amp2.htm



marknoir

Re: Bryston 10B Electronic Crossover Review
« Reply #9 on: 18 Apr 2008, 01:13 pm »
Marknoir,

Just wondering if you were using the active crossover AND the passive crossovers at the same time?

Wouldn't it be best to compare active without the passive crossovers vs. just the passives? Maybe that's exactly what you did.

Just trying to understand what's going on. I have never used an active before but I don't see any reason why a properly set-up, quality active - that allows for the complete removal of the passive crossover - would necessarily be inferior to the passive alone.

Thanks

-Mike


No, to use passive and active together would be rather stupid. There's a huge toggle switch on my speakers that disconnects passive when used with active.

I trust my ears, and my ears tell me in this case, that inserting a multitude of resistors, capacitors and active components (active crossover) in the signal path does deprive the signal of it's purity more, than a few caps and coils (passive). My speakers go down to 23 cycles, so I have no issues there, be it in passive or active mode. Lack of phase correction is easily heard at the crossover frequency point, manifesting itself either in suck-out or boom. The worst active crossover that I have had was actually the one that came with speakers originally from Infinity. In 1978 review of it was not favorable.

I support the minimalistic/pure approach, when less is more. That includes people who use drivers with NATURAL roll-off to do away with crossovers completely, if possible. I also support people who use single driver speakers, losing bass extention, and some treble as well, but get that magical pure music. I believe that in multi-channel, multi-driver installations, like concert halls, stadiums, movie theaters AND CARS! - you can not do without an active, but then you really don't expect a very clean, accurate, and musical presentation there. It is always a compromise.

As to my opinion that 10B is overpriced - perhaps I forgot that a gallon of gas today is 4 bucks (more in Canada), so may be I should adjust my view on pricing!

Anybody and everybody is welcome to come to my lowly Brooklyn home and hear what I'm talking about.

Last note on reviews, and I'm not trying to put down the review in question, this was just my personal experience. I have once heard a multi-thousand dollar tri-amp set-up, used to review VERY expensive equipment. Within a minute I told the reviewer that his sytem was out of phase. After arguing for a few minutes, it was checked-out, and, indeed, it was... So it's been a while since I took any review without a grain of salt. Perhaps I should mention that I used to work in a very prominent recording studio, when I was young, famous and rich, and I left, because I could not tolerate the way music was recorded there, with all their super-duper equipment, that is to say, with all it's life sucked out of it. Analog was the way then, and the worst killer of sound? - Dolby noise reduction, professional version as used in that studio.

As to me, preferring passive to active: last night I came across a post on Audio Asylum, dating back a few years, on 10B again. That individual also went back to his passives, and he most likely is not alone, I just did not search more.

Which brings me to another point: why spend many-many thousands of dollars on expensive equipment, which (supposedly) preserves PURITY and ACCURACY of original signal, just to degrade it by inserting another PROCESSOR (analog OR digital) into signal path? UNLESS absolutely necessary???

Rgds, M

woodsyi

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Re: Bryston 10B Electronic Crossover Review
« Reply #10 on: 18 Apr 2008, 03:05 pm »
Line level or speaker level, most XO's are not phase perfect.  Good passives I am sure are more dialed in then some cheaper actives in terms of slope and pole frequencies to match the drivers.  OTOH, the actives take out the reactive components of other drivers in a speaker which allow for cleaner sound.  Just like anything else, it's a give and take.  I prefer active and you apparently prefer passive.  So be it.

Happy listening,

chrismercurio

Re: Bryston 10B Electronic Crossover Review
« Reply #11 on: 18 Apr 2008, 03:57 pm »
I think the biggest advantage to active over passive is taking deep bass out of the mains and out of the amplifier driving the mains. This creates a much easier load to both amplifier and speaker that allows for lower distortion and greater dynamic range from the system as a whole. The trouble is creating a decent analog crossover that is both flexible and doesn't break the bank.....

Best,
C