Beluga's Maggie IIIa Statement System
( click on following pics to enlarge )
Maggies & front DIY room lenses LEFT |
Maggies & front DIY room lenses RIGHT |
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Audio Physic Rhea subwoofer & lots of Chinese granite |
Rhea & power conditioners close-up |
Sioux carpet |
DIY passive X-overs, stands & rear room lenses |
1st Modifications
Structural
- Replacement of the wood sidings with aluminum U-profiles, glued on with heavy duty boat glue
- Mounted aluminium plates on the back stands/feet extensions to make stands more rigid and provide platforms for the heavy weight concrete slabs under x-overs
- Further stiffened with aluminium “bars” mounted between the aluminium sidings down to the aluminium platform
Crossovers
- Removed all original wiring and crossover components
- Built new X-over and wiring from ground up
- Prepared for bi- (and later tri-amping) with active X-over(s).
the Stack |
Passive filter overview |
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Stands, stone & filter sideview |
Power filtering & cabling |
2nd Modifications
Crossovers
- Bi-amped with (Dynamic Precision) electronic crossover between bass and mid/tweeter. This crossover is a 24+24 dB/Octave phase correct crossover @ 300 Hz. This means I had to switch polarity for the entire mid/tweeter section as well as the sub. The 24dB slope for the mid high pass gives a slight boost in the lower mid/upper bass region which makes the sound a little woolly and congested. Electronic crossover with similar slopes as original passive filter is recommended (and is my next project).
- Rebuilt passive (formerly internal) 3kHz crossover between midrange planar and the true-ribbon tweeter. Same values as original, but with premium components such as silver in oil caps and foil (12 & 16 AWG) coils.