System that sounds so real it is easy to mistaken it is not live

@atmasphere , I should have phrased that differently. It is the SLs that do not like making bass. The MA 2's should be fine driving the SLs in the bass because the impedance is so high. I am not asking the MA 2's to drive 2 ohm subwoofers.

@rauliruegas , I had Velodyn subs for the better part of a decade. The surrounds corroded and they literally fell apart. I can not quote you figures but I do know that given appropriately large drivers in well constructed sealed enclosures distortion levels are easily under 0.5%. It is only when using smaller drivers in flimsy enclosures that distortion becomes a problem.  An amplifier that has tight control over the driver like the JC 1s with their damping factor over 1000 will result in excellent performance far in excess of what any Class D plate amplifier can provide assuming a large driver in a well constructed enclosure of which there are very few. The Velodyns do not qualify as a well constructed enclosure. No commercial subwoofer excepting the Magico Q series qualifies. If you commission me I will build you a knock out set of subwoofers. 

@jetter , they will be exactly where the JC 1 are. There are two cooling fans for each amp. I will know right away when a tube fails as the power in that channel will drop enough to skewer channel balance. It only takes a dB or two to change balance enough to alert me to a problem. I am not at all worried about it. 

Dear @atmasphere  : I know that very weel and knowing the JC 1+ design I posted about.

Look, a really whealty friend of mine was and is in " love " with my quality level speakers so he took around 10 days of his time and fligth to Utha where he was with Wilson and Sound Labs and cost no object for him he decided  to come back México bringing with him the top of the line Sound Labs and the pair of Parasound monobloks that were recomended by the desigbner him self.

He did not comment with me nothing about but around 3 weeks with the speaker/amp in his big dedicated room invited me to listen his system ( before the Sound Labs he owned Raidho beautiful DK speakers ) and was a surprise to me to found out the SL down there and till that day we try to improve the SL quality room levels performance ( obviously with subs. ).

Well even all those he told me months latter at my place: " I really like my SL/JC but still prefers your vinatge system ".

In the other side he was a tube lover till SL designer gave the advice for the Parasound.

You already know that after owned for 10 years tubes and from some time now I'm allergic to tubes ( any ) for my system no matters what.

R.

till that day we try to improve the SL quality room levels performance ( obviously with subs. ).

@rauliruegas If you were running an amp like that, I would expect that you might want to use subs. That is a very common experience people have with ESLs and solid state in general. If you have the right amp those speakers have excellent bass on their own! To be clear I was not making an indictment on the Parasound in any way other than what you seem to be corroborating here. 

Dear @atmasphere  : After 4 months I suggested my friend try subs to look for an improvement and before that nothing was wrong with the bass but true self powered subs goes lower than what is need and SL can't goes down there.

Latter on he changed the Majestic line for the top Ultimate that sounds alittle better but with almost same problem in the low bass.

JC 1+ has no problem to handled at any SPL the Ultimate SL or any other speaker out there, problem is the SL low bass overall performance.

R.