http://supratekaudio.blogspot.com.au/2012/11/an-inexpensive-top-quality.html
They're really quite capable as singles but stacking two pairs gives even greater sensitivity and a larger dispersion, which gives a bigger , more open sound.
I had some speaker frames made up by a furniture craftsman (John Thompson Designs in Bussellton) to give some weight and solidity to the set up.
The sub/woofer remains the same, an Acoustic Elegance 18" driver which has the ability to remain linear up to well over the crossover point of 400Hz.
I chose this higher point to give a bit more solidity to the crossover region as it did sound a little weaker there with the extra sensitivity of the stats.
Amps remain solid state high power, pre is tube (of course!) active crossover is either digital or a op-amp version I'm experimenting with.
Once I found the optimal crossover points I'll build a tube crossover .
One new feature is the use of a parametric equaliser program incorporated into the computer audio program I use for playback.
Fabfilter Pro-Q used with JRiver Media Centre 18 is really exceptional- easy to use, very versatile, and operating at 64 bit , it sounds very good.
(For Mac it can be used with PureMusic)
I prefer it to the sound of the parametric functions in the digital crossovers I use (DEQX and DBX PA) and its much quicker and easier to use.
Heres a screen shot of one of the settings I used to determine EQ for the large workshop the speakers are presently in. Final settings will be not as dramatic, but a very powerful tool.
The sound of the stacked stats is very good, they have a real ability for a big sound, and for their size have remarkable dynamics and power.
Active operation and EQ is the best option to get them at their best, I would imagine it would be very time consuming to build passive crossovers to suit.
They are too good for my workshop, but enjoyable to listen to while working.
