Sabrina X Anyone Add Subwoofer(s)

Sadly I don’t know of many subs that have good built in crossovers. wilson audio makes an external one but it is $5k. Their new subs are built in. The JL E-lines is fine as in no loss of detail but super noisy and raises the noise floor. JL-audio and Bryston make good ones “cheaper”. There are lots of cheap options but I don’t know the quality. I have tried my JLs (system pictures under my profile) with and without the crossovers many times. There is really no comparison. The crossover is much better in spite  of the increased noise. 
 

Anyway on the MA12000 you can add an external if it doesn’t have internal bass management (I don’t think it does). On the back there are two bars that bind the preamp section to the amp section. You can pull those bars out and insert the crossover there. So it would be out from the “pre” into the crossover then back into the amp input. 
 

review of the cr-1 here. 
 

https://www.soundstageultra.com/index.php/equipment-menu/537-jl-audio-cr-1-active-subwoofer-crossover

Sabrina X still back ordered, but managed to add a Technics 1200G turntable, Sutherland 20/20 & LPS and a pair of REL s/812s.  Working on power outlets, cable and acoustic room treatment.  I didn't want the expense of adding a high pass filter and I don't want to change anything about the Sabrina X.  I'll crossover the RELs in the 30-40 hz range..but we will see how this all fits.  Right now I'm using early 1990's $950 small monitors..

How many here have suggested listening to your new speakers first?

If you didn't hear any break up distortion in the Wilson's bass region with your amplifier driving them there is no need for high pass filtering which is usually included in many subwoofers.

I'm told you can demo SVS subwoofers for free.

How many here have suggested listening to your new speakers first?

Excellent advice, but after listening to the MA12000 driving the Sabrina X, I decided that I did not want to alter what seemed to me to be an extraordinary speaker. They also had all but the last octave of base, so I looked for a fast subwoofer that was known for their high level inputs. Available funds made the S/812 my compromise choice. Moving into the reference series increased cost and limited availability.  I'm now curious to listen to the difference with the subs on vs off.

My curiosity was in directly comparing a $9K REL Studio III with two processing subwoofers at a little more than half the price.

Enjoy