The ProAc D30DS offers a silk dome air cooled tweeter, utilizing the same high-quality HF units found in the D48/D48R models and so provides an excellently clear and well voiced sound. The classic ProAc split crossover design allows for bi-wiring and bi-amping adjustments. ProAc has developed a specific bass driver for this model, featuring a cone made from pulp and mica, coated with acoustic dope. This driver now includes a phase plug to enhance detail at the crossover point, resulting in a more natural sound. The crossover network employs top-tier components and multi-strand oxygen-free copper wiring. The Response D30S models offer an exceptionally flat response, with the bespoke bass driver and crossover providing improved midrange detail and a wider soundstage. The D30S delivers an exceptionally accurate portrayal of music, with excellent midrange detail and low coloration. This speaker is also easy to drive, thanks to a crossover using the finest quality components and beautiful nickel silver terminals. Specifications Nominal Impedance: 8 ohms Recommended Amplifiers: 10 to 200 watts Frequency Response: 20Hz-30kHz Sensitivity: 89dB linear for 1 watt at 1 metre Bass /Midrange Drivers: ProAc 25mm (1”) silk dome air cooled and inner damping. Mirror image offset. Ribbon Tweeter Option D30DS: ProAc 25mm (1”) silk dome air cooled and inner damping. Mirror image offset. Crossover: Finest components on dedicated circuit board. Multistrand oxygen free copper cable throughout. Split for optional Bi wiring or Bi amplification Height (Cabinet): 1041mm (41”) on spikes Width (Cabinet): 266mm (10”) Depth (Cabinet): 311mm (12”) Weight: 28kg (61.72lb) each cabinet Mode: Floor standing Grille: Acoustically transparent crimplene Standard Finish: Black Ash, Mahogany, Cherry, Natural Oak, Silk White and Walnut. Premium Finish: Rosewood, Ebony *Premium Finishes to order at extra cost*