I finally got around to augmenting my Animas with 4x passive
subs (built by a local guy):
The specs for each sub are as follows:
- 91L sealed enclosure
- 1x 12" driver (blended wood pulp, 19Hz fs)
- no internal crossovers
- 25mm MDF
- 37Kg
Here's how the subs look alongside my Animas:
The system chain is as follows:
- PC with Roon Core (global volume, crossover filters, channel
level-matching and driver time-alignment all done here at 64bit precision)
-> ethernet
- PC/streamer with RoonBridge -> USB
- Okto dac8PRO 8-channel DAC (for 2x 4-way) ->
balanced XLR
- Sealed subs: low-passed @ 70Hz using 36dB/octave filter in
DSP -> 2x Rotel RB-1590 amps
- Upper-bass horn: band-passed 70Hz-500Hz using 24dB/octave
filter in DSP -> 2x Neurochrome 286 amps
- Mid-horn: band-passed 500Hz-1000Hz using 24dB/octave
filter in DSP -> 2x Neurochrome 286 amps
- High-horn: high-passed @ 1000Hz using 24dB/octave filter
in DSP -> 2x Neurochrome 286 amps
The main objective was to relieve the upper-bass driver of having
to perform near its 32Hz fs. This has resulted in a far more melodic and
tuneful upper-bass sound, which I really like. And of course, an extra octave
has been added to the bottom end by the subs themselves, which is nice.
Overall, I'm very pleased with the results.
Mani.
|