Help My wife bought me a sub


My wonderful wife bought me a used but well cared for SVS CS-Ultra subwoofer for Christmas, which was very cool. However, she didn’t know about passive vs. active subs and I don’t have an amp (the RDA-7 does not have a sub output) to drive the passive CS-Ultra. If I was going to buy an amp I’ve read that a Crown K1 might be a good choice, which I’ve seen used for around $700.

I have a dedicated room which is small, 12’10” x 9’ 5” x 7’ 10”. Mostly used for TV but want a high level of satisfaction for movie/concert video’s when I do watch. No critical music listening done since I have a separate room for my 2-channel for that. I currently do not have a sub but have been looking, just hadn’t pulled the trigger yet.

While I’ve read that the CS-Ultra is a very fine sub the drawbacks I see compared to active subs are no amp, no electronic adjustable characteristics like phase, gain, EQ, etc.

Active subs I had entertained were the SVS PC-Plus or PC-Ultra, Onix Rocket UFW-10, Hsu VTF3 Mk 2, or something along those lines. I have a balanced output connection from the RDC-7 processor and would like to use it if possible.

I’m thinking that if I did sell the CS-Ultra along with the money I didn’t spend on a Crown K1 amp I would have plenty to buy a really nice active sub that would give me all the electronic adjustable bits I think I need.

The components I’m using are Integra Research RDC-7 processor and RDA-7 amp, NHT M5 L/C/R speakers. No surround speakers yet.

What to do? Any advice or suggestions would be most welcomed!
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Showing 1 response by tarsando

Your wife got 'close' picking a brand you were considering but a passive version. IMO the fact that she bought you stereo equipment for xmas far outweighs all the considerations you mention in your email and that the first respondant anyway responds to. Make it work--any old used ss amp should do the trick. Get an integrated one and run the tape out from your preamp to it, adjust the gain as needed, decide on phase with speaker lead swaps and leave it that way. Many HT receivers have a high level sub out with xover. Maybe that plus a ss amp. Find an xover stand alone. Use your ingenuity and be grateful. That's a bigger challenge than selling the thing and getting exactly what you think you want. (Good luck)