New and Improved Sound
on BeoLab 1 Part I
purchasing a pair of brand new Beolab 1 I was dissatisfied with the sound (as
I expressed in the BeoWorld Forum). Bang & Olufsen seemed to be unhelpful and
a little arrogant in the matter, as to helping me resolve the issue.
opinion these big “pillar” speakers sounded razor sharp, ice-cold and
screamy when playing CDs of good dynamic qualities.
technician I refused to accept this. I started researching everything I could
about these speakers.
having spent some time researching, I discovered three potentiometers on the
active X–over located behind the covers (at the bottom), which controls each
of the amplifier units with 3-4 Db. I started experimenting with these.
discovered that, when turning a potentiometer left, an element played less,
and when turned right it played louder. I wrote down all the original values
and continued experimenting.
After a little while I was
able to localise each screw and what element it symbolised:
I have now
customised the values on the screws and the result: a little more bass and
less ice-cold and screamy sound from the mid-range element!
customised changes have allowed me now to enjoy a little more listening,
instead of getting worn out by the continuous metallic, cold, surgical and
artificial sharp sound (especially at high volumes 50-56).
Before attempting any form of modifications, please be aware that
modifications carried out by none B&O personnel could result in loss of
warranty (as posted by our moderator). Further more, if you make the
modifications be sure to “mark” the positions of the “damping bricks” as to
where they are located in the cabinet. The following modifications are based
on previous modifications made to my BeoLab 1s (where I changed all three
Modifications carried out with the following setup: BeoSound 3000 and BeoLab
my previous modifications (to the potentiometers) I was never 100% satisfied
with the outcome. Though the modifications (in my opinion) were a great
improvement, I decided to see if any other modifications could be carried out
(as to improve the sound).
So, in my
quest for perfection, I recently decided to disassemble my BeoLab 1s.
thing I noticed was that very little damping material had been used to damp
the reflection of the inner-waves. As illustrated on the picture below, only
four small “damping” bricks and one very thin sheet of damping material (at
the bottom) are used.
As you can
see on the picture, no damping material has been used on the upper part of the
speakers (where the upper woofer is located), which seems very odd to me.
Now if you
disassemble other speakers of high-end brands like B&W, Tannoy etc you would
see that the speakers are filled with damping material. And even as
insignificant that this may seem to many of you, I can assure you that it has
a great impact on the “sound experience” from a speaker.
decided to modify the BeoLab1 with high-quality damping material, enough for
30 – 40 litres. And filled the whole cabinet with it (as illustrated on the
assembly, I moved the “bricks placement” to maximum width to see how the
woofers sounded. When placed far apart, the woofers sounded softer (much more
like the Pentas) and when placed close together (like originally mounted), it
sounded punchier! So I decided to experiment with the placement of the
“bricks”, and eventually found a satisfying position for them.
original placement of the “bricks” the woofers theoretically only had about
2-3 litres of volume.
These customised changes,
have made my BeoLab 1s much smoother and I think I’m nearing pure perfection.
Stay tuned for modifications
Part III ;)
As provided for BeoTech by
Please be aware that any
modifications to any Bang & Olufsen product is done so at your own risk -
BeoWorld/BeoTech will not be liable for damage caused by following suggestions
given on this site.
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