Originally Posted by waynomo
.... I thought a Canton sub would blend and work best with my current speakers. Are you suggesting that is not the case?
no, with subwoofer this is usually never the case, you should rather see it as an extension in the low freq range that rightly done can also ease load on your mains and not just extend. So without "blending in" you would just limit the sub on the upper freq. end so it fits your mains lower freq. end. More an sort of "align" then a "blend".
But you most probably buy at same cost/quality philosophy of a vendor, so at least they fit general expectations.
Only if you route the main channels via a xover that covers both, the sub and the main channels there is a technical integration and good blending possible, this was usually done on speaker setups in the past, some Canton subs do have that capability where the sub feq. get filtered out for the L/R signal you take from the sub. In an old analog setup you would then put the active sub in the monitor/tape2/equalizer signal path. A passive sub with sattelites did take the full speaker out signal and only provide a filtered signal to the satellites for better overall sound from those. In both cases the mains were free of low sub signal load.
But especially in that xover and sub freq range the room acoustics can do a lot of evil.
The sub should be bought in relation to room characteristics and towards expectations of low freq capabilites and/or detail/music. The more complicated e.g. non standard rectangle closed boxed room the better you have 2 or more subs. For multiple subwoofer setups there are some good reads to find on the internet, from Geddes or Mehlau for example, they give guidance of how to choose subs and do a setup propperly. For a good integration of a sub into a given speaker setup in todays digial receiver world i recommend an Anthem ARC capable processer/receiver in case you can afford.... at least it was the only way i got satisfying results in my case, but i did go for 2 subs later non the less...
just checked the model data of Ergo 122DC. With 2x 260mm woofers do you really think you need an additional subwoofer? You better get one that has way bigger woofers and an amp to power it, the ASF75 would be too small for lower freq. and just add additional power ..... maybe you just need a more capable amp to drive these woofers...? .