Subwoofer Choice

I am in the process of building out my system. I have the end goal in mind, and ticking off the equipment as I get them. I do need some advice in the subwoofer category.

I am currently driving Monitor Audio Silver 500s with a Michi X5 integrated amp (600w @ 4Ohms RMS). This is way overkill for these speakers. But my purchase (coming in August) will be the Focal Sopra No. 3s.

That being said, I am looking also to add a subwoofer and I’ve settled between two (2) REL T/9x’s or one (1) REL S/510. T/9X is $1,249 vs S/510 at $2,749.

There is a REL youtube video from their chief designer comparing (briefly) the two and actually stating that "just because one S/510 costs twice as much as 2 T/9x don’t think you can equate them with 2 vs 1". I paraphrased a bit.

But the below is only 3min long please watch and let me know!

What are your thoughts. Obviously 2 subs are better balanced than 1, I get that. But given the specs here am I better at buying up for the better 10"?

Listening room is carpet, 16’ x 24’. 384sqft. 8ft ceilings. What info did I leave out?



May I suggest Monoprice's Monolith Subwoofers!   They come in all different sizes and price ranges and they're top of the line can often be caught on sale.  Besides being very reasonably priced their quality is top notch which you can read all about them in many reviews.  I personally just purchased their 2,000 Watt Dual 15" Subwoofer which although I still haven't or hooked up because I have pneumonia keeping me down, I've done my all my research and am quite satisfied with their Customer Service and my prior interactions and inquiries.  


Great post, pinthrift. Looking forward to your impressions. I bet it’s going to be fantastic.




I put together a system for my daughter that has the Monitor Audio Gold 50 and Rel  Tx9.  They mated well together


it does not look like the Michi will support the CR-1 crossover. You would need an amp input. Does the michi have bass management built in? Looks like it has a sub out.