I think there's a possibility for confusion here...

Although Trinnov offer the current Altitude in a variety of configurations including 8 & 16 channels as well as 24/32 channels there has been some discussion of a lower cost model with reduced functionality (max 16 channels I think). I've seen this referred to as Altitude 16 - which I think is what Cliff was meaning. I haven't seen any specifications on this lower cost option so don't know how it might hook up to the 271.

Chris

Lounge/Cinema, Trinnov, DSP8000XE, 4x 320.2 in-ceiling, M6 rear, 2x DSW.2
Roon Nucleus+ and 320.2 in-ceiling in many rooms (KEF in-ceiling in bathrooms)
Spare: DSP5000, 598, 562v2, 500Mk2, 518, 519, 504, 101B, M3, 861v4, 800 DVD, MS600, MC200