Rated 4.9 (173 reviews)
The KEF KASA500 is a DSP-controlled Class D system amplifier delivering 2 x 250W into 4Ω (or 500W bridged into 8Ω), optimised to drive KEF Ci subwoofers such as the Ci200QSb-THX. Line and speaker level inputs, a 12V trigger and configurable pass-through with optional high-pass filters let it slot into a wide range of home cinema and custom install systems.
Power
2 x 250W
4Ω, <1% THD
Bridged
500W
8Ω
Crossover
40-140Hz
or bypass
Rack
2U
ears included
Features
✓
Class D amplifier, 2 x 250W into 4Ω or 1 x 500W bridged into 8Ω
Class D amplifier, 2 x 250W into 4Ω or 1 x 500W bridged into 8Ω
✓
DSP control optimised for KEF Ci subwoofers
DSP control optimised for KEF Ci subwoofers
✓
Selectable stereo RCA line level or mono LFE RCA input, plus stereo speaker-level input
Selectable stereo RCA line level or mono LFE RCA input, plus stereo speaker-level input
✓
DSP-configurable pass-through with optional high-pass filters
DSP-configurable pass-through with optional high-pass filters
✓
Adjustable crossover 40-140Hz or software bypass
Adjustable crossover 40-140Hz or software bypass
✓
12V trigger input
12V trigger input
✓
Firmware updatable via the KASA500 Programmer software
Firmware updatable via the KASA500 Programmer software
✓
Rack mount ears included (2U); black finish
Rack mount ears included (2U); black finish
✓
Firmware presets for KEF Ci200QSb-THX, Ci3160RLb-THX, Ci250RRb-THX, Ci200TRb and Ci4100QLb subwoofers (THX-certified performance where applicable)
Firmware presets for KEF Ci200QSb-THX, Ci3160RLb-THX, Ci250RRb-THX, Ci200TRb and Ci4100QLb subwoofers (THX-certified performance where applicable)
✓
Stereo or mono input mode; channel / bridge switch
Stereo or mono input mode; channel / bridge switch
✓
RCA line output to link another KASA500 or power amplifier
RCA line output to link another KASA500 or power amplifier
✓
Music Sense auto power-on and 12V trigger
Music Sense auto power-on and 12V trigger
Note
Firmware updates use the KASA500 Programmer software and need a USB Type A male to USB Type A male cable (not stated as included).
Specifications
| Model | KASA500 |
| Amplifier power | 2 x 250W @ 4Ω; bridged 1 x 500W @ 8Ω (<1% THD) |
| Crossover frequencies | 40 – 140Hz or software bypass |
| Inputs | Selectable stereo RCA line level or mono LFE RCA; stereo speaker level |
| 12V trigger input | 8 – 14V DC @ 1.5mA max, 3.5mm (1/8″) jack, tip positive or negative |
| Dimensions (H x W x D) | 88 x 432 x 304mm; 92mm high with feet |
| With rack ears | 2U, 88 x 483 x 304mm |
| Weight | 4kg |
| Compatible subwoofers (firmware) | Ci200QSb-THX, Ci3160RLb-THX, Ci250RRb-THX, Ci200TRb, Ci4100QLb |
| Line output | RCA |
| Colour | Black |
