Living Voice R80 Loudspeaker Lab Report

Lab Report

The 210mm Scanspeak Ellipticor bass/mid driver works to a high 2.8kHz here, the CSD waterfall [Graph 2] revealing a series of low-level modes up to ~4kHz before the 34mm Ellipticor dome tweeter builds to a peak at 10kHz [see Graph 1]. Distortion, however, is a very low sub-0.1% at 90dB SPL right up to the top of the bass/mid driver's passband. Otherwise, the offset MTM geometry complicates measurement of the R80's forward response at 1m but the slightly downtilted trend is likely to 'fill out' between 1-3kHz at greater listening distance, improving upon the ±3.7dB and ±3.8dB response errors, respectively. However, the HF roll-off is a 'feature' of the R80, even on-axis, leading to a limited 17kHz extension (–6dB re. 10kHz). Pair matching is good to 0.9dB (worse case between 3-5kHz but typically within 0.4dB from 200Hz-20kHz) while the R80's sensitivity is a healthy 91.1dB/1kHz (89.7dB/500Hz-8kHz).

The R80's conjugate loading flattens its impedance above a few hundred Hz where it dips to a minimum of 4.1ohm/127Hz but never rises above 8.8ohm from 75Hz-100kHz. All the big swings in impedance occur in the low bass where phase angles of –58°/67Hz and +51°/18Hz contribute to a minimum EPDR of 1.8ohm/93Hz. While this is not especially tough, the abundance of bass (33Hz at –6dB re. 200Hz) is not achieved without some 'colour'. The two woofers share a 48Hz-415Hz (–6dB) bandwidth but the upper driver is punctuated with notches at 150Hz, 450Hz and 900Hz associated with a pipe mode in the reflex port (tuned to 25Hz) that are also seen on the impedance and response [green shaded area, Graph 1]. PM


Response including nearfield summed driver/port [green], freefield corrected to 1m at 2.83V [yellow], ultrasonic [pink]. Left, black; right, red

Living Voice R80_Waterfall_L_35dB

There are multiple low-level modes associated with the Ellipticor bass/mid driver up to ~5kHz

Sensitivity (SPL/1m/2.83V – 1kHz/Mean/IEC) 91.1dB / 89.7dB / 88.5dB
Impedance modulus: minimum & maximum (20Hz–20kHz) 4.13ohm @ 127Hz, 36.7ohm @ 58Hz
Impedance phase: minimum & maximum (20Hz–20kHz) –58° @ 67Hz, +51° @ 18Hz
Pair matching/Resp. error (200Hz–20kHz) 0.9dB/ ±3.7dB/±3.8dB
LF/HF extension (–6dB ref 200Hz/10kHz) 33Hz / 17.0kHz/17.2kHz
THD 100Hz/1kHz/10kHz (for 90dB SPL/1m) 0.2% / 0.07% / 0.5%
Dimensions (HWD, ex-plinth) / Weight (each) 1090x310x423mm / 45kg
Price £41,000-£47,000 (depending on finish)

Living Voice
Derbyshire, UK
Supplied by: Definitive Audio, Derbyshire, UK
0115 9733222