What's the difference between a Rel t/9 & T/9i?

Thanks, Al. That post by taww and your first 4/1/18 post in that thread have given me pause about using any sub with the A7e. I was planning to connect the left and right speakers to L+L-R+R- block of the KEF 10b, but now I worry about damaging the A7e.

The current setup is balanced analog from an Ayre Codex in DAC mode to the A7e that drives a pair of KEF LS50s. I don’t perceive a need for a sub, given that the setup renders jazz bass very well, and I mostly listen to jazz and chamber music in the living room.

In another setup Ayre QX-5/20, KX-5/20, VX-5/20 drive KEF Reference 1s augmented by a pair of Velodyne HGS-15s with SMS-1 bass management. That can satisfy my lust for pipe organ recitals.

Is it safe to try the 10b if I connect only the left or right speaker? That is, connect to the L+L- or R+R- input of the block but not both. I had planned to add a second 10b if I liked the sound.

I suppose I could return the 10b to KEF.

db

Thanks, Al.  I'll try to return the unused 10b to KEF.  I'm happy with the sound of the Ayre A7e driving LS50s without sub augmentation.

Ayre stuff is tricky.  I inserted a supposedly balanced Bryston 10B high-pass filter between the KX-5/20 and VX-5/20 even though Charles Hanson had admonished me not to do it.  Of course he was right, some to the Ayre magic was lost and the sound deteriorated.  I removed the Bryston filter after hearing the result.

db

My HT setup uses a Bryston SP3 processor, NAD M22 and C-268 amps, with six KEF LS50s.  One of its Velodyne HGS-10s needs repair, so I think I'll substitute the KEF 10b for it.  

Given how little traffic there is on the LA freeways now, I'm tempted to make the drive from Montecito (AKA Santa Barbara) to LA to drop off the 10 and a 15 for repair.  George Meyer claims to be open for business.  His shop repaired the other 10 and 15 last year.  I've used the HGS models with SMS-1 bass management for decades.