DALI KORE Loudspeaker Lab Report

Lab Report

DALI's specification for the KORE was largely met on test. Its complex crossover maintains a sub-9ohm impedance from 46Hz-12.4kHz, hitting a 3.2ohm minimum at 67Hz (a nominal 4ohm) which, with max/min phase angles of +36°/–65° (+44°/10Hz), results in a minimum EPDR of 1.2ohm/58Hz. However with a controlled ±10° impedance phase (and >5.0ohm EPDR) from 200Hz-10kHz, the KORE remains an easy drive for all likely partnering amplifiers. Sensitivity at 87.8dB/1kHz and 88.2dB/500Hz-8kHz is not too far off the rated 89dB and, with its max. 1.5kW amplifier rating, suggests that exceptional SPLs will be achievable at very low distortion (sub-0.5% from 50Hz-20kHz at 90dB SPL). The magnetically-attached grille has an influence through mid and presence [blue trace, Graph 1] and should be removed, though the U-shaped mid and boosted presence/treble of the 32mm dome [black/red traces, Graph 1] flattens out with increased listening distance and toe-out (up to 20° off axis).

The ±2.9dB response errors occur between 4-13kHz but pair-matching is a creditably tight 0.5dB (200Hz-20kHz). This is tricky to achieve with a complex multi-way system, although the paper pulp/wood fibre bass and mid drivers themselves are not entirely clean of breakup modes [see Graph 2]. By contrast the 32mm dome/55mm planar 'EVO-K' hybrid tweeter array is impressively free of any aggressive breakup. The upper and lower bass units both have a 42Hz-112Hz (–6dB) bandpass, peaking at 63Hz, and port tuning of 24Hz, but the lower unit extends more gently out to 300Hz (–10dB). Drivers and ports combine to yield a deep, diffraction-corrected extension of 28Hz (–6dB re. 200Hz). PM


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


Some modes are revealed from the paper/wood fibre drivers but EVO-K hybrid tweeter is clean

Sensitivity (SPL/1m/2.83V – 1kHz/Mean/IEC) 87.8dB / 88.2dB / 86.6dB
Impedance modulus: minimum & maximum (20Hz–20kHz) 3.16ohm @ 68Hz, 26.4ohm @ 40Hz
Impedance phase: minimum & maximum (20Hz–20kHz) –65° @ 46Hz, +36° @ 33Hz
Pair matching/Resp. error (200Hz–20kHz) 0.5dB/ ±2.9dB/±2.9dB
LF/HF extension (–6dB ref 200Hz/10kHz) 28Hz / 24.3kHz/26.9kHz
THD 100Hz/1kHz/10kHz (for 90dB SPL/1m) 0.2% / 0.06% / 0.3%
Dimensions (HWD) / Weight (each) 1675x448x593mm/148kg
Price £70,000

Nørager, Denmark
Supplied by: DALI Audio UK Ltd, Herts, UK
01462 337320