KEF Audio 3000 Series - Manual (Page 10)

Specifications
Model HTS3001 HTC3001 HTB2
Design Bass reflex two-way Closed box three-way Powered Subwoofer
Passive radiator
Drive Unit Array 115mm (4.5in.) Uni-Q 115mm (4.5in.) Uni-Q 1 x 250mm (10in.)
19mm (0.75in.) aluminium HF 19mm (0.75in.) aluminium HF + 1 x 250mm (10in.) ABR
2 x 75mm (3in.) LF
Frequency Range 70Hz - 55kHz 65Hz - 55kHz 30Hz - 250Hz
Amplifier Requirement 10 - 100 Watts 10 - 100 Watts 250 Watts built in
Sensitivity (2.83V/1m) 88dB 90dB n/a
Maximum Output 108dB SPL @ 1m 110dB SPL @ 1m 110dB SPL @ 1m
Impedance 8 Ω 8 Ω n/a
Internal Volume 1.75 litres 2.4 litres 15 litres
Weight 2kg (4.5lbs) 2.6kg (5.8lbs) 11.3kg (24.9lbs)
Dimensions (H x W x D) 245 x 125 x 150 mm 130 x 300 x 185 mm vertical:
9.6 x 4.9 x 5.9 in. 5.1 x 11.8 x 7.3 in. 390 x 440 x 195 mm
15.4 x 17.3 x 7.7 in.
horizontal:
227 x 440 x 385 mm
8.9 x 17.3 x 15.2 in.
Finish High Gloss Black or High Gloss Black or High Gloss Black or
High Gloss Silver High Gloss Silver High Gloss Silver
Dispersion Over 90º arc with 2dB Over 90º arc with 2dB
reference, both horizontal reference, both horizontal
and vertical and vertical
Harmonic Distortion 2nd and 3rd harmonics 2nd and 3rd harmonics
(90dB, 1m) (90dB, 1m)
<0.8% 120Hz - 30kHz <0.8% 120Hz - 30kHz
<0.3% 250Hz - 22kHz <0.3% 250Hz - 22kHz
Crossover Frequency 2.2kHz 500Hz / 2.2kHz
Power Requirements 100 - 240V ac 50 - 60Hz
Items are available separately, or packaged as a complete system.
GP Acoustics (UK) Ltd. reserve the right, in line with continuous research and development, to amend or change specifications
without prior notice. E. & O.E.
Subwoofer Drive Unit
Heavy weight long-throw motor design with
aluminium Faraday ring for reduced distortion.
Magnetically shielded.
4-layer copper coil for high power capacity.
FEA 1 optimised coil and magnet design to give
a linear BL profile 2 .
Rear suspension and surround FEA optimised
to give maximum linear excursion resulting in
reduced distortion.
Auxiliary Bass Radiator (ABR)
Balanced symmetrical low profile ABR
design for more linear excursion and
reduced distortion.
Internally vented ABR air cavity resulting
in less compliance damping giving better
LF performance.
1 FEA = Finite Element Analysis - a design development process where individual components are modelled and analysed within a
computer program.
2 BL profile = measurement of the motor force factor on the speaker driver over the working displacement of the magnetic coil.
3 Opto-coupled LED and light sensitive resistor senses overdrive and automatically limits this to prevent damage to the unit.
Electronics
Highly efficient 250W class D
amplifier.
Thermal and overcurrent
protection built into the
amp and power supply
unit ensuring ultra reliable
performance.
Sophisticated limiter system to
prevent voltage overload is
optimised for maximum
audio quality 3 .
Subwoofer Technology