Beolab 5 - Four Questionable Technologies


I'm looking to buy a high-end speaker system and have become enamored by the Beolab 5 Powered Speakers by B&O.

In their literature the tout 4 technologies that set them apart.
I am not an audiophile (yet) but wonder what those with more experience think about these four ideas.

1. An Acoustic Lens technology
This means a much wider dispersion of high frequencies. Supposedly this makes sweet spot for listening is much larger. This means you can sit in different places or move around and still have optimal sound.

2. Adaptive Bass Control
This uses a microphone in each speaker to calibrate the low frequency interaction with the room. This permits a wider range of speaker placement. For example, one could be near a wall, or one could be near a corner and this would compensate.

3. Digital Signal Processing
Being all digital, each speaker is calibrated (tweaked) before leaving Denmark to match a reference speaker. This is not possible with analog systems. It assures a that all of the speakers sound the same, a sort of quality control.

4. Digital Amplification
Each of the speakers has four digital amps; one for each driver. Somehow, by being digital Class D amps they can be smaller and run cooler than other amps. That allows them to put 4 powerful amps insider the very confined space of the speaker enclosure. The high power allows peak sound levels of 115 to 120 dB.

Thoughts and comments on any of these four technologies would be appreciated.

And, if you have heard these speakers, do you think they are for real.
hdomke

Showing 4 responses by martykl

Hdomke,

People have their own definitions, but IMHO an audiophile is a hardware hobbyist. You needn't ever swap out gear, but if you meet the definition of "audiophile", you're always thinking about it at some level. If that's not you - Don't call yourself an audiophile! (and certainly don't feel slighted)

The Beolab looks very interesting, but for much less cah you can implement full spectrum deqx processing/digital X-over with any # of speakers featuring the dispersion pattern of your choice. The packaging will probably be less slick than the B&O and the set-up more labor intensive, but the results should meet or surpass the Beo-Lab for most (though probably not all) ears.

Good Luck,

Marty
My wife and I headed into LA for dinner last night and she wanted to do a bit of shopping in Beverly Hills beforehand. So, prompted by this thread, I arranged an audition at the B&O store on Rodeo Drive. She asked me if I was going to buy something.

"I'm going to listen to a $23K speaker", I replied "There is very little chance that I am buying something" "But", I added "That is not the same as No Chance."

Although a bit skeptical, part of me wanted to be so blown away that this post would end with the cliche "I bought the review pair!"

Unfortunately.......

To be fair, the listening set-up at Beverly Hills B&O is horrible. The speakers were jammed into the corners of a roughly 15 X 22 ish foot room. They were within a foot of the front wall behind them and within inches of the side walls.

Nevertheless, bass response was very good. Octave to octave balance struck me as fairly neutral other than reduced output in the upper bass/lower mids. The speakers are definitely on the lean side for a high end design. This may correlate to Shadome's observation about this range. Definitely lean relative to my Merlin VSMs, which themselves are often cited as "too lean" sounding by some on this forum (I disagree).

I heard no flanging effects which I could identify.

I also heard no semblance of a sound stage (Duke Ellington meets Coleman Hawkins can produce a ridiculously wide stage on a good set-up). Tonally, reproduction of this CD was very, very good. I would only note diminution of impact of the bass line relative to what I'm accustomed to. Sax and piano sounded beatiful and drums had real impact. No problems there. Overall, the missing sounstage was the real disappointment here.

Once I switched to Joan Armatrading's DNA the audition went downhill fast. This track features JA's very distinctive voice over guitar driven accompaniment that gets busier as the song progresses. With the volume up, any congestion/compression becomes quickly evident. And it did. Very evident and wholly unacceptable in the price range (I was quoted $19,950). The same problem occurred with Richard Thompson's "Guns Are The Tongues". After that, I cut the session short, thanked the very nice salesfolk and left.

Now the caveat. It is possible that the distortion was due to:

A) A problem upstream of the speakers.
B) A problem with the left speaker - the issue seemed a bit left speaker centric with both tracks.
C) A sympathetic vibration (rattle) somewhere in the room near the left speaker.

The experience was disappointing, but may (or may not) be more an indictment of B&O Beverly Hills than the Beolab 5. If my experience was typical, getting a good handle on this speaker may be difficult.

Good luck.

Marty
Hdomke,

To get a sense of soundstage go to a nearby high end dealer and ask him to demo any speaker that he feels will impress with its soundstage. Most will be able to find a recording and system that will make it very clear what the term means. Ironically, some people (justifiably) point out that you rarely hear this type of spacial illusion at a real performance. Usually, that is quite true. Yet, the quality in a stereo is critical to me. YMMV.

BTW, I can't state with confidence that the Beolab 5 doesn't image (soundstage) well. Few speakers will do so when jammed into corners. Also, the congestion I heard at demo may be due to distortion generated by the speaker as loudish, complex musical passages tax the drivers and force them to misbehave. Or, as I noted, it could have been the set-up or some defect. I was not listening at crushing levels and I found the problem instantly identifiable. I find it hard to believe that neither of the reviews linked to this thread mentioned the problem, so I'm inclined to believe that it was unique to the Beverly Hills set-up.

OTOH, Shadome may have heard a similar problem. It's quite possible that the wide dispersion pattern makes distance from the side walls critical to best results. A speaker which pours so much energy off axis may sound congested due to early side-wall interactions. Shadome, how was the set-up at your demo?

To sum up, I left the demo feeling like I knew very little about the speaker, other than buying this speaker would require an in-home demo and a large listening room. I don't know if B&O would accomodate such a request.

Good Luck,

Marty
Hdomke,

To clarify my statement about Beolab 5 imaging-
I used a double negative:

I was stating tha the imaging problem (like the congestion problem) may be due to poor performance by the speaker or may be due to set-up. I just don't know. That's why I said an in-home demo in a room large enough to get the speakers away from the walls will be essential.

I'm happy that B&O accomodated you. The sound I heard was poor enough in certain, specific ways that I am inclined to believe that (at least) part of the problem HAD to be the set-up, otherwise those rave reviews would be hard for me to understand.

OTOH, Shadome heard a pair that seemed to be set up in a better (though perhaps still less than ideal) way and heard some of the same issues. I am eager to hear about your demo and i look forward to your post.

To sum up:

1) I wouldn't dismiss this speaker until I heard it set up properly
2) The demo I heard was pretty terrible for a speaker in this $ range.

I hope that clarifies.

Marty