Years ago I owned a pair of model 1.2s and always loved the midrange clarity and the dimensional array sound, but was always disappointed with the bottom end response. I realize that the specs show the units operating way down in the frequency spectrum, but it's not apparent when actually listening to them.
I even went to the extreme of replacing the passive radiator with active speakers and realized a great improvement in bottom end, but at the expense of natural sound.
For the past 6 or 7 years I've been running with 2 sets of speakers...alternating them occasionally just to have something to do. I have Altec model 19s and Klipsch Cornwalls...both of which sound great and have awesome bass response with no sub needed at all. I run a pair of highly modded McShane Citation 2 power amps and an AR LS25 Mk 2 preamp. The combination has been inspiring. I also have 2 Mac 275s available although the Citations kick the heck out of the Macs.
This week I ran across an extremely well cared for set of SDA SRS 1.2s that are all but flawless and I just had to pick them up. I set them up and again am in love with the soundstage and vocals, but to my dismay have also lost all but a little of the bottom end response I am used to with the Altecs.
I have read several posts of members changing the crossover components and increasing the bass response substantially and would like to do something with these as well.
What, if any, are the ways to increase the low and mid low bass response from these units? I love the looks and the overall sound, but the bass seems to lack terribly compared to the Altecs and yet I want to use these....I just need to help out the bottom end without having to run several subs to make up for the loss.
Is there anything I can do with the crossover components or the passive radiators to make any marked improvements?
I'm sure running a 1000 watt solid state amp might make some difference, but I'm a tube person and I think a good solid 100 watts per channel out of my bridged Citation 2s should be more than enough to really kick these things in. I can barely run them past the 12 O'Clock position on my preamp and still stay in the room. It's not a power problem.
Any advice on crossover component changes or radiator changes to raise the level of the lower frequencies would be greatly appreciated. I know I could again go to active 15s in the system, but it feels like a butcher job and even though it does make a big difference it also has drawbacks in other areas.
Thank you for any suggestion you can offer.