alper_yilmaz
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Mike,
Welcome to the Forum...
If you are used to and like the sound coming out of your B&W, those are decent speakers (even the low-end models and I do not know which model you have). To this day, I still have my DM630i's (at 91dB and 4 ohms) which I drive with an SE84UFO25. But back in the day, when I first started my Decware journey, I started with an SE84CS, and then added a second one to double (or more) the power. Those amps driving my B&W's were great in tone, yet struggled at operatic voice and classical piano music (there was too much clipping).
When I switched to the TORII mkII, my problems were solved, and I used that combination for close to 6-7 years. Whenever I try my amps with single-driver full efficiency speakers (including some Omega's and Zu's), I was never satisfied personally, but that is only me. As I do not have a dedicated listening room, I do not have any room treatment at all, so I never had the chance to fine-tune my single drivers; so I am not the best person to comment on that. Yet, given the experiences of our fellow Froum members, going the low-power amp - hi-efficiency speaker route might still be the best way to go.
However, here is what I would do. I would invest in the ZMA or the current version of TORII, and hold on to the B&W's for a while. I can assure you that that would be a to-die-for experience already (that has been mine). Over time, such detailed amps can even change your listening rituals. For instance, I have three systems at home currently, two of which are low-powered Decware amps (SE84UFO25 and SE34I.2+). The Decware's are driving the B&W's and some Rega's, both of which are around 91dB, and the volume for any type of music is more than enough for me; as I hear every single detail in all registers that my ears can pick.
So, after spending some time with the ZMA/TORII/B&W combination, I would start looking into also the low-powered options over time, for a second system in place. In the meantime, of course, I would invest into the source(s) as well as cabling and filtering.
IMO and IME... Best,
Alper
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