Please recommend a subwoofer(s) for my 2-channel music-only system.

[DmitryЖ]

Magnepan 3.6/R speakers with a frequency response: 34Hz-40kHz, ±3dB. Small room, 16Lx13Wx7H. Room is open at the back. I have a McIntosh MEN220 unit with RoomPerfect room correction system, which has an active crossover function that I would like to use with the subwoofer. Magnepans are an amazing speaker, but I would very much like that last bit of the finishing touch on the very low end.
I've read conflicting opinions whether one or two subwoofers would be better.
Lastly, my subwoofer budget is up to $2,500, but I wouldn't mind staying on the lower end of that, if the difference between a very good less expensive subwoofer versus a pricier one is just the cosmetics.
Thanks!

 

[its phillip]

If you don’t mind waiting a bit I think a pair of the new HSU VTF-TN1 subs would be very hard to beat at that price.

 

[Mikado463]

Congrats on the Maggies, great speakers and when set up properly they are superb. As for subs, IMO 'if' you have the room and the budget, 2 are better than 1. Given you somewhat small room(for 3.6 Maggies) I'd suspect a pair of 10 or 12 inch subs would do nicely.

I'll let the sub experts chime in here with recommendations within your budget

 

[kini]

Magnepan 3.6/R speakers with a frequency response: 34Hz-40kHz, ±3dB. Small room, 16Lx13Wx7H. Room is open at the back. I have a McIntosh MEN220 unit with RoomPerfect room correction system, which has an active crossover function that I would like to use with the subwoofer. Magnepans are an amazing speaker, but I would very much like that last bit of the finishing touch on the very low end.
I've read conflicting opinions whether one or two subwoofers would be better.
Lastly, my subwoofer budget is up to $2,500, but I wouldn't mind staying on the lower end of that, if the difference between a very good less expensive subwoofer versus a pricier one is just the cosmetics.
Thanks!

Look for a sub(s) that have low group delay and that fit your budget and output needs.

 

[-Jim-]

If you don’t mind waiting a bit I think a pair of the new HSU VTF-TN1 subs would be very hard to beat at that price.

While I don't disagree, I suggest waiting on these anyway until @shadyJ has done his review.

 

[lovinthehd]

Two subs can help smooth response, your room and positioning would be some determining factors. Do you have a box size and/or placement limitation for sub(s)? Another Hsu option that may be more friendly size-wise may be their ULS-15 sealed sub, a very good performer.

ps Here's the AH review https://www.audioholics.com/audio-amplifier/impedance-selector-switch-1

 

[Will Brink]

Magnepan 3.6/R speakers with a frequency response: 34Hz-40kHz, ±3dB. Small room, 16Lx13Wx7H. Room is open at the back. I have a McIntosh MEN220 unit with RoomPerfect room correction system, which has an active crossover function that I would like to use with the subwoofer. Magnepans are an amazing speaker, but I would very much like that last bit of the finishing touch on the very low end.
I've read conflicting opinions whether one or two subwoofers would be better.
Lastly, my subwoofer budget is up to $2,500, but I wouldn't mind staying on the lower end of that, if the difference between a very good less expensive subwoofer versus a pricier one is just the cosmetics.
Thanks!

I'd take a look at the reviews here and see which fits your budget and space. Plenty of good brands that tested well for that budget.

 

[TankTop5]

If it’s just music and not movies you won’t need much if any infrasonic output which achieving is what drives subwoofer price up to do well. Dual SVS SB3000’s come in just under budget and are pretty tough to beat. In your room they will have considerable output from 20hz and up and will definitely energize your room. They are also going to be smaller than just about anything remotely close in price and output.

 

[Golfx]

If you get two subs you can get more output with less stress (compression) from each individual sub meaning less distortion. Most go with sealed subs for a smaller footprint or ported if the larger size doesn’t matter. Because you have nice speakers I would opt for two subs to create less distortion.