Dave,
I'm familiar with the Harbeths. The Quad II Classic monoblocks *may* meet your dynamic needs if you are satisfied with what you get from the 300B amp, but understand that the Harbeths' 6 ohms impedance isn't optimal for the Quad IIs, which put out maximum power 8 - 16 ohms. Power output erodes quickly below 8 ohms, markedly below 4 ohms.
The Quad Two-Forty removes risk of being unsatisfied dynamically while delivering the essential Quad valve sound. The 12 ohms Druids and 16 ohms Superfly are virtually perfect matches for the Quad II. Plus the Harbeths' passive crossover will introduce additional drag on your perception of dynamic life compared to crossoverless Zu (which is a bit different from calculated dynamic range at a given speaker efficiency/amp power).
Phil
I'm familiar with the Harbeths. The Quad II Classic monoblocks *may* meet your dynamic needs if you are satisfied with what you get from the 300B amp, but understand that the Harbeths' 6 ohms impedance isn't optimal for the Quad IIs, which put out maximum power 8 - 16 ohms. Power output erodes quickly below 8 ohms, markedly below 4 ohms.
The Quad Two-Forty removes risk of being unsatisfied dynamically while delivering the essential Quad valve sound. The 12 ohms Druids and 16 ohms Superfly are virtually perfect matches for the Quad II. Plus the Harbeths' passive crossover will introduce additional drag on your perception of dynamic life compared to crossoverless Zu (which is a bit different from calculated dynamic range at a given speaker efficiency/amp power).
Phil