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Howard Stone Howard Stone is offline
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Default Amplifier for passive subwoofers

a) Efficiency of the sub-woofer?
b) Tube or solid-state?
c) Generally, on the spectrum between Heavy Metal and Full Classical Orchestra, where do you fall?
d) New, used, or vintage?

(a) The Subwoofers are rated at 250W at 8 ohms and has a basic sensitivitv of 86dBW at the 16ohm setting. Heres some more technical data

€œInside the speaker box is a pair of 260mm pressed-steel-chassis bass units, pulp coned and fitted with low hysteresis half-roll surrounds of foam polyurethane. Placed side by side on the open baffle, one faces forward and the other back, providing some balancing of linearity.
The Gradient employs two low-frequency drivers in each cabinet, arranged as an open-baffle linear array to give dipole operation. 6dB per octave boost needs to be applied throughout the low frequency range to offset the falling open baffle response, and the bass units used need a linear, high excursion capability; ± 12mm is quoted. Before overload is reached, the degree of boost must be limited and this sets the degree of bass extension available. In this sense the SW63 is not a true sub-woofer in that it does not go that final 10Hz down to 20Hz. However, it does extend the power response of the Quad by almost an octave, whilst simultaneously increasing the dynamic range and linearity of the main system.€

(b) Solid state

(c) I listen to organ, harpsichord, small vocal ensemble

(d) used or vintage