SVS Micro.

 

Some suggestions(all are sealed for size considerations & a little over budget sorry)

Two SVS SB1000's black friday sale = $899

One SVS SB3000 = $1099, much better than the SB1000, worth the extra

PSA S2410 - This is new, the most pricey option, but an excellent value = $1199

S2410

Redefine your listening experience with the S2410 Subwoofer. High end sound at a low end price.

www.powersoundaudio.com

HSU ULS-15, $899

ULS-15 MK2 Subwoofer :: Affordable Sealed Subwoofer

Introducing the ULS-15 MK2 subwoofer, the renowned musical 15" subwoofer that has garnered immense popularity because of it's sealed subwoofer technology. The best, affordable sealed subwoofer HSU Research.

www.hsuresearch.com

 

Given that one bass module is dead, are you unplugging the other one to simulate it being dead too? That seems the only way this approach will work. Even then, I think you will have difficulty because the bass modules in those speakers play quite a bit into the mid-range frequencies with a gradual slope in their crossover region. Generally, receivers will employ a steeper slope that will not match very well.

One possibility would be to employ a miniDSP module instead of using the receiver's internal bass management. This should allow you to use a 6dB/octave slope that would more closely match your speakers.

If it were me, I'd chalk it up to lesson learned and sell off the speakers, then use the proceeds to get a more conventional set of books or unpowered towers and a sub.

 

Thank you all for your replys. @RayGuy...this was something I was worried about. Whether or not adding a sub would compensate/work with the speakers as they are. It is definitely a lesson learned. Given the history on the DT speakers I have, it's very unlikely I'll ever buy anything DT related again. I also have the a DT center and DT rears and have had no issue with either but those are being powered by my receiver. What I may do is wait for DT to have spare amp plates, buy one and replace the defective one and then sell off everything....start from scratch.

 

Given that 1) you are only buying one, 2) you have budget limits, and 3) you have a large space

I recommend vented/ported as you get a lot more bang for your buck.

Prices recently went up across the board but HSU is still a good deal:

VTF-3 MK5 HP Subwoofer

The new VTF-3 MK5 HP sets a new standard for high-end performance at an affordable price point. It’s earned its reputation as one of the best value ported 15" subwoofers on the market. Customer favorite and best seller Smaller enclosure than the VTF-15H MK2 (4” less depth) and lighter, but...

www.hsuresearch.com

 

Where are you located at?
I'll have a pair of 3-4 month old HSU VTF-2 mk5's looking for a new home very soon...

 

What's the spec on that mid driver in the BP-8040? At 3.5" I'm worried that a true subwoofer will leave a hole in your frequency response if you can't cross it over high enough. It seems to me that if you plan to keep the speakers and unplug the woofer what you really want is a midbass module. Of course that will create localization issues unless you buy two and position them next to the towers. I think this is a recipe for disappointment.

I like your revised plan better. Live with it until you can replace the amp, ditch the lemons, hook yourself up with some new towers you love, then reassess your needs from there.

 

Agreed - I would replace the failing powered towers with a pair of passive towers and then add a subwoofer to the system.

Depending on how the DT crossover is designed, you may be able to bypass the amps if the are being fed an already low-passed signal from the crossover and then convert them to full passive. That would keep them running and save on the towers purchase.