Hi
Firstly, the terminology
AS - means 'active sub'
D - means down firer
the first 2 numbers refer to the sub itself i.e. 15, 20, 22, 25, 40, 50
With regards to the numbers above, the larger the number the larger the sub
the third number (if there is one) i.e. 220, 250 has been added to show that a sub e.g. an ASD220SC is in simple terms a an AS22SC on its face, now acting as a down firer. In real terms it is more complicated, because the parameters for a forward facing drive unit are different to a down firer. Therefore the crossovers have different charcteristics to suit either appplication. But the drive units, ports are the same and cabinet sizes are similar.
SC - this refers to cantons in-house 'SC' technology. It is part of the crossover network that extends the speakers transmission range by an octave and more downwards. i.e. the bass is deeper
AS 15,20,22,25 are available in black, silver or beech / silver
AS40, 50 are available in black and beech / silver
ASD 220,250 are available in silver, beech / silver and cherry / graphite
The Ergo & Karat range of speakers have there own ranges of subs and are made from real wood veneers,
Ergo AS1.2SC & AS2SC are both forward firing and have a nom./musical output of 140/200W & 250/350W using 8" & 11" drive units
Karat is more complicated it has 3 subs, AS200SC, AS300SC & AS500SC
AS200SC is 140/200W & 8" and is a down firer. It comes with its own plinth that it sits on (as with all the Karat range, the plinth is spiked to the floor and the sub has rubber spikes onto the plinth) Utilizing the plinth means that the sound produced is cleaner and more precise. (most down firing subs lose most of there energy banging sound into the carpet/ floor or even losing definition because the sound has been pumped straight into the floor cavity!
AS300SC and AS500SC are 250/350W & 400/600W both with 2 x 11". They utilize a Bass reflex system with passive membrane. this is known as an infinite baffle and gives amazing power, control, and warmth but has the ability to scare the pants off you at the right moments. both sit on there own plinths
Karat & Ergo range are available in real wood veneers in Black, cherry, beech & silver
finished typing
i'm very sorry if this was boring or to long for some people but I thought if I get it written down at the begining then I won't have to do it again !
as always, if anyone has a question, please let me know.
regards
JJ