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Ruark Sabre-R loudspeaker Measurements

Sidebar 3: Measurements

I used DRA Labs' MLSSA system and a calibrated DPA 4006 microphone with an Earthworks microphone preamplifier to measure the Ruark Sabre-R's farfield frequency behavior and dispersion. I used an Earthworks QTC-40 mike for the nearfield responses and Dayton Audio's DATS V2 system to measure the impedance magnitude and electrical phase angle.

Fig.1 Ruark Sabre-R, electrical impedance (solid) and phase (dashed) (2 ohms/vertical div.).

Ruark specifies the Sabre-R's sensitivity as 86dB/2.823V/1m, which was confirmed by my B-weighted estimate. The…

Ruark Sabre-R loudspeaker

Like many aging American music lovers, my earliest memories include watching the televised supernova that was The Beatles performing on The Ed Sullivan Show in 1964.

Immersion in various British pop groups followed, including the melodically graceful Chad & Jeremy, the polished Peter and Gordon, and sentimental pop purveyors Gerry and the Pacemakers. These acts provided not mere entertainment but an emotional refuge. Their tuneful, comforting repertoire was solace for a sensitive 6-year-old.

Hours were devoted to listening to a transistor radio, held close enough for the…