The AHBs are bridged and I'm using the middle gain setting. These are the numbers I got from Rory at Benchmark:Which gain settings using with x-sabre 3 on AHB2?
Can X-Sabre drive AHB2 full output?
22dBu (9.8 Vrms sensitivity) is equivalent to 9.2dB gain. 15.2 bridged.
14.2dBu (4 Vrms sensitivity) is equivalent to 17dB gain. 23 bridged.
18dBu (2 Vrms sensitivity) is equivalent to 23dB gain. 29 bridged.
So the AHB2s should be providing 23 vmrs in my case. Speakers are fairly efficient (88 or so; Revel 226be) and at 2-3meter distances it can get very loud with room to spare, based on the volume ring on the Sabre3. Not sure if that answers your question. I've just had mine for a day but so far very impressed. I've always used digital systems for room correction, bass management etc so this is a bit of an adventure for me