Bert's web page:
I started with the
hobby about twenty years ago due the lack of good sounding systems for
a reasonable budget. I still believe that for a given budget, the performance
of most systems suck! This is the main reason why I developed my own system
which gives me most pleasure each day. The problem of most systems (no
matter how much they cost!) is the lack of the capability to reproduce
the emotion and the right atmosphere at the time of the recording. The
main reason for this is the used complexity of electronics and the crossovers
needed in multi-way systems.
The more electronics and the more drivers
in loudspeakers (with there crossovers), the less spherical stage, less
emotion, less detail, etc.
Therefore I use wide-band drivers (no crossovers!)
and SE-tube amplifiers for the most critical part and a huge sub horn (the
whole width below the red front horns) to enjoy the deepest frequencies
without distortion and the lack of control.
I am lucky to have enough space around
my house and build my own studio (8.5 x 4.1 m.) to separate audio from
the family. WAF is no issue here and also the only way to listen to music
at any time I like!
I listen to all kinds of music. Live recordings
give me most pleasure! 20% classical, 35% Jazz and 45% rock or pop music
(no hard rock anymore, I am getting too old for that!). The CD's I am using
for evaluation purposes are the followings:
Jazz - (Verve 837933-2) Shirley
Horn "Close Enough For You"
Jazz - (Windham Hill Records
WD-0124) Tuck Andress "Reckless Precision"
Choir - (Proprius PRCD 7762)
Classic - (Reference Recordings
RR-70CD) Stravinsky Minnesota Orchestra "Firebird Suite"
Percussion - (BIS CD-232) The
Kraumata Percussion Ensemble
Pop - (Columbia UCD 2-537 double
CD) Pink Floyd "The Wall"
Pop - (Antilles 533 799-2) Mari
Boine "Callin" live
Organ - (Dorian DOR-90117) Modest
Mussorgsky "Pictures At An Exhibition"
||None ( I am much to lazy )
||Philips CDM12 (highly modified)
||Audio Synthesis DAX-2 (HDCD)
||Array Obsydian, passive remote controlled
||Unison Research Smart 845 (highly modified), Rotel RB-990BX (for
||Oris 150 Reference (the Oris 150 front horn
with horn loaded sub)
about his System:
AA: "Bert, how would you describe
your system's sound?"
BD: "The system doesn't sound at
all. It only reproduces the signal in the right proportions, size and depth.
The very quick, detailed, precise and dynamic sound gives one the feeling
of being present at the performance, first row!"
AA: "Do you think there is room
BD: "No, I am fully satisfied with
AA: "Have you got plans for upgrading?"
BD: "With a new standard in the
Digital reproduction and recording (higher resolution), yes."
Re-Visit Notes (7 February 2000)
I was not planning to upgrade my system. This doesn't mean that I do
not open my eyes and ears for nice additional tweaks, just for fun. My
system was built out of all kind of different brands and looks, the passive
pre-amplifier is very good looking, but the Rotel amplifier not (sounded
very controlled though!). I saved some money and wanted to have the Array
Quartz SS amplifier for the looks but the sound should be okay (my main
demand) and lend one for audition. It turned out that this amplifier had
even more control over my sub then the Rotel. So far, the amp never left!
Another upgrade was the main power filter incl. cables. I was looking
for one a long time but they all didn't work properly, loosing dynamics
and sounding dull. After removing those filters the live feeling was back
again! The last try with the Kemp Elektroniks filter (spelled right!) was
another story, the opposite! It turned out that it sounded if I had more
dynamics with the filter connected.
If this isn't enough, the third upgrade (for the time being) is a new
amplifier for the Oris 150 front horns. I have a very beautiful 300B SE
amp in consignment using Western Electrics 300B tubes and all kind of other
audiophile sounding parts. This big amp (75Kg) makes the sound even more
complete which is hard to describe in words...
If you are in Holland, just call or e-mail me for an appointment to
judge using your own ears!
All items are the same except for:
WE300B for the Oris 150 reference horns.
Array "Quartz S" 120Mhz Solid
State amplifier for the horn loaded sub
||Kemp Elektroniks Mains Power
Adnan Arduman comments:
Last week I was in Holland and accepted the kind invitation of Bert.
It is an hour drive from Amsterdam, and a very pleasant one if the weather
Bert is so lucky to have a totally private house of his own, entirely
dedicated to his system. The bass horns happen to be the integral part
of the room occupying nearly one third of it. In order to make you feel
the size and depth of these bass horns Bert and I occupied each of the
channels. See the bottom picture taken by my wife (Bert: left channel,
me: right channel).
We listened to different CD's of Bert ranging from classical orchestra
to rock. I was positively impressed by the sound in general. There was
no compression at any volume, bass slam was stunning and the high frequencies
were very detailed and present.
At one point I suggested to elevate the speaker cables from the floor
(on the bottom picture you can see two PVC pipes placed vertically near
the right speaker, they were just placed for this experience). We both
could hear the increased transparency and inner detail as if one layer
of veil is lifted. A very worthwhile tweak, totally free of charge and
which definitely works. It is now up to Bert to find a permanent solution
to implement this tweak to his system.
It was great to meet Bert and spend two enjoyable hours full of music
and Hi-Fi. Absolutely recommended!