I find the B&O passive amplifier excellent for the money.
I have one in my kitchen, coupled to a pair of inwall B&W speakers. The sound is lovely and sweet, but if you have a Quad 405 amp to replace the B&O passive, this one would rocks really.
Had myself for years a Quad 33, 33FM with 405 amp, and enjoyed it very much untill the next buy was a 66 series, that disappointed me so much that I put it aside. (I still use my 33 combination, upgraded by
Russ Andrews)
Yes, I kown my spelling is horrible…