I have tried my Caiman SEG as a pre-amp into my mono-blocks. There was no problem with the sound level but I found the sound to lack detail and dynamics compared to the passive BTE pre-amp that I use. Also my BTE allows me to switch the input to my AV amp pre-out to drive the front speakers.
Cheers
Alastair
RPI4/PI2AES running PiCorePlayer/LMS-> AQ Carbon AES -> Topping D90 DAC-> Khozomo Passive Pre-Amp -> 4x Temple Audio Monoblocks powered by 2xLiFePO batteries->Van Damme Black Bi-Wired to B&W 804 Nautilus and Sommer Carbokab 225 Interconnects