Choosing an amp for the BD15s (BD-Design)

by GC, Sunday, August 21, 2005, 23:21 (6794 days ago)

I have been experimenting for a little while now to find the optimum amp to
run the BD15s through Berts passive low pass filter and alongside DX4
Hedlunds fed by an EAR 861 power amp

I tried an Audionote Meishu (300B SET) but it lacked the required drive at
low frequencies.
Tried the following SS amps - Musical Fidelity A1, Rotel RA 921, NAD 3020
and a BK Electronics 200 wpc Mosfet pro amp.
The MF in class A had the quality but not the drive, the Rotel and NAD were
fine but nothing spectacular, and the Mosfet amp had the drive but not the
finesse or foot tapping qualities required.

This is my first experience of trying to perfect the use of a quality sub
with Lowther horns. I know the BD15s have what it takes, but the choice of
amp is proving tricky. I am surprised how much the BD15s (with notional
70-80Hz cut off) contribute to the sound of the Lowthers right up to
frequencies involved in female vocals and I want the amps to overlap as
effectively as possible.

So the sub amp requirement is an amp with extended low frequency drive (SS)
at reasonable cost, coupled with a valve-like sound having resolution,
timing, finesse etc

My 'final' choice is to be the Sugden A21a. It seems to have all the
nnecessary characteristics and will have a good resale value if I decide to
change later.

How are others approaching this?

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Perhaps an open door but...

by GC, Monday, August 22, 2005, 07:26 (6794 days ago) @ GC

...I use the BD30 amplifiers for the bass. :)

http://www.bd-design.nl/index.html?lang=en-uk&target=d5.html

Ciao,

Bert

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Perhaps an open door but...

by GC, Wednesday, August 24, 2005, 16:33 (6791 days ago) @ GC

Might be a Class-D amp or a TriPath Class-T at 100Wx2. Higher efficiency, right?:-P

Francis

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