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Behringer Digital Crossover Prelimenary review.
I would prefer to call this an initial and preliminary review - While I have tried to be balanced, I believe a proper review is best done when you have lived with something for quite a while. I also think that a review is best done when the only change that has been made is the item you are reviewing in some sort of A - B comparison so you can make clear comparisons or at least with a system you are familiar with. The Nakamichi CA1 I had been using for a preamp died a week or so ago - so part of that will never come to pass. With a new preamp 12b4 TVC preamp almost done, and I'm gather parts for another amp so the system will be in a state of flux for some time
Caveat - I am using as preamp a Phillips receiver that was an early "surround sound" long before 5.1, I've had it so long I can't remember how long and it is not what anyone would consider "audiophile" by any stretch of the imagination.
Let's get to the review - I'll put associated equipment and info at the bottom. I would also like to state that the purpose of this review is for the use of this equipment as a digital crossover for home audio use and not for _pro_ use.
Name of the unit is Behringer Ultradrive Pro DCX2496 - Behringer prints across the unit
Professional Loudspeaker Management system.
http://www.behringer.com/02_products/prodindex.cfm?id=DCX2496&lang=eng
The unit was $325.00 including freight, from http://smproductionsinc.zoovy.com. I have no affiliation with SMProductions. I will say it was the best price I could find and they shipped quickly.
The unit is a rack mount _Pro_ stlye crossover whose nearest equivalent that I am aware of is the BSS FDS-336 MINI DRIVE LOUDSPEAKER MANAGEMENT SYSTEM which sells for approximately $1250 new in the US. Nemo at AA has made some posts about digital crossovers and when I asked him about the BSS unit he suggested I consider this unit.
Short version of features - for the long version click on the link above -
Basically you punch in selectable crossover points, standard slopes up to 48DB, your choice of Butterworth, Bessel, or Linkwitz, auto time alignment/delay and a good bit of EQ options along with a certain amount of level matching - It was the time/alignment and delay that sold me on giving this a try.
Hook-up - In keeping with it's _pro_ designation this unit uses xlr (balanced) connectors. Well, you've probably got to do some soldering, becauseI couldn't easily find XLR to RCA conncectors, so I went to Radio Shack and bought 2 mike cables and 2 pair each of male and Female XLR connectors and soldered them to the ends of several pairs of the old monster rca interconnects I had laying around.
Impedance mismatch was something I had been concerned about because of the differences in pro and home audio, but there has been no apparent problem.
Setup was a breeze - for Phil anyhow - he set it up smoothly in about 1/4 the time I would have. Phil brought a signal generator, and 3 band per octave Real Time Analyzer and he brought a very acute pair of ears - Phil spent about 5 or 10 minutes reading the manual (something on he learned on the way to getting his EE degree probably prompted this reading of the manual stuff) and the user interface was a breeze for him. During setup Phil made several remarks along the line of "you mean they've got _automatic_ time alignment with this thing"? Phil tweaked a couple of db in several places but we made no attempt at room EQ or time alignment because of time conflicts.
Listening - This unit is really good - essentially transparent - beautiful integration with the subs.The sound seems a good bit more coherent overall even in the mid and higher octaves presumably because the higher crossover point is taking the lower end stress off of the driver.
There seems to be a slight lack of depth of soundstage which I can readily attribute to the inadequate preamp and the fact that I didn't have my silver interconnects in the system, because they're hardwired into my new tube preamp which isn't quite ready. I had noticed before that the silver interconnects seemed to add depth and lift a slight veil when they were in the system. Possivly the time alignment will help some also. The Behringer unit is obviously doing the job for me very,very well.
As fas as I'm concerned it's a definite keeper.
Summary.
The ability to match levels of amps and speakers, along with variable crossover points, slopes, types, and to time align while doing this in the digital domain make this unit outstanding for the money. I won't be in the slightest surprised if you start seeing a number of these units used in home audio as a digital crossover because this is an excellent solution to more than one or two problems.
Listening to the music tells me that whatever the Behringer imparts to the music in a negative manner it more than makes up for by the problems that it solves better than other solutions.
As Nemo mentioned to me in discussions prior to my purchase, a true pro audio person that makes their living on the road or in front of a mixing console will probably look at this unit with disdain - the construction and various mechanical functions do not appear to be heavy-duty enough to hold up well to life on the road or in a full fledged _Pro_ environment. However, construction is far more than adequate for a set it, forget it, and tweak now and then crossover.
Many people of my generation have never truly learned to program their VCR. I usually do pretty good with stuff like that but have to think about it - I'm really glad Phil was here and did the setup. I wouldn't have finished until the next day sometime - It's not really that hard to set up. However, it's not really what I would say easy either - If you have trouble programming your VCR you would do best to have a "PHil" who does pro-audio on the side lined up. Unless you can't program your VCR you should be able to do it without "Phil" and without a RTA - but it's going to take a bit of tweaking and careful listening to get it right. With the RTA Phil dialed it in so quick I was surprised.
Associated equipment
Source = Sony C555ES SACD
Pre-interconnects= Pure Silver Sound
Preamp = Preamp out section of Phillips FR880 receiver
All other
interconnects= Radio Shack and almost discarded Monster Cable
digital crossover= Behringer Ultradrive Pro DCX2496
Amp for Mid-Hi = VAC 30/30
Cables for Mid-Hi= Pure Silver Sound Octets
Mid-Hi- speakera = Azurahorns - 1 metre Fibreglass horns with fostex FE206E drivers
Amp for subs = Crown Com-Tech 410 - 225 wpc (recent ebay purchase)
Subs = NHT1259's in Madisound approx 3 liter sealed cabs
Misc = Crossover point of 172 hz 4th order Butturworth with inverted phase - Initially the sound stage was some what collapsed and lacking depth, Phil inverted phase and Viola there it was. I had thought that we were setting up LR 4th order but at some point The unit defaulted to Butturworth ( or we did). It sounded so good we just left it.
Power filtration consists of one Powervar 12 plugged into another Powervar 12.
Music used
Dire Straits = Sultans of swing - the Very Best of Dire Straits
Getz/Gilberto = reengineered from 1963 SACD
Willie Nelson = Stardust SACD
Brassed Off = Movie Soundtrack
I usually listen to a good bit of classical but apparantly wasn't in the mood on this day.
I had planned to wait until I had more listening time but am going to be pretty busy for a while and thought I might put it off too long and not make the post.
If anything of import comes up I will add to this or make a post of such.
Regards
Ken L

High Efficiency Speaker Asylum

Prelimenary Review of Behringer Digital Crossover