Amp for lightspeed attenuator? = $1000 used

"Dddrrreee As a complicating feature, I'm using Y connectors to split the lightspeed output signal so I can feed it to a velodyne SMS-1 bass management unit (which I use to drive two subs).Dddrrreee"
You can get me on "georgehifi at optusnet dot com dot au"

As with any other system active or passive these "Y connectors and active subs" brings in another added equation to the impedance matching, of system compatibility.
If you use active subs, this makes the load to the Lightspeed and the source even more difficult, then I suggest a buffer after the Lightspeed like the "Burson 100 Buffer" which unfortunately is no longer available new, you may find one second-hand or another equivalent that is a pure buffer with no volume controls or selector switching on it.

Cheers George

I use a Lightspeed clone (Lighter Note by Uriah Dailey) with a Rogue Atlas. Not sure about the exact specs but they are working GREAT together.

Be patient and wait for a used Music Reference RM-10 MkII to come up for sale. You won't be sorry.

Dddrrreee, good advice from Clio09 on the Music Reference RM-10 MkII a quite few Lightspeed Attenuator owners have had great success with this amp, saying it's a match made in heaven.
As does the amps Sam Tellig from Stereophile, he uses the Lightspeed Attenuator with his Quicksilver Silver 70 mono blocks and his much loved low powered Sun 2A3 single ended triode monoblocks, and used the words.
"the harmonic presentation was nothing short of flabbergasting. As a former (very poor) pianist myself, I look for the magic of the moment—the sound, not so much the movement, of the notes. I know that, in musical performance, timing is everything. Still..."

Cheers George

I use a Sumo Polaris 310 the early model. The two following models really sound different to me. The one I have to me sounds like a rowland model 1 that I compared it to for a few weeks but with a very slight more liveliness. That is quite good company. Sumo actually had their pre amp with a passive mode so it works well. It has 47k input imp. and a 1.27 input sens. This amp is twenty years old used on average 12 hrs a week. Never had problem with it. But may be hard to find being that old. The 2 following models were redesigned by someone other than the original designer Rich May. So those are really a different sound, a bit bright imo. From what I hear though some day it would fun to try a proper tube amp. I have had tube amps, arc classic 60 and arc vt70, in the past but not with the LS. The sumo when it comes up seems to be asking about 300..I don't know if he still does, Mike Bettinger use to fix and rebuild sumo and gas gear. I understand he did a great job.