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Power amplifiers mono — ModWright Instruments KWA 99
Description, images, technical data and specifications
ModWright Instruments KWA 99
Image source — © ModWright Instruments
The KWA 99 is a mono power amplifier from ModWright Instruments, an American manufacturer known for considered hybrid tube and solid-state engineering. The KWA 99 brings ModWright's approach to dedicated monoblock power amplification.
Key specs that matter
Output power is 100W into 8 ohms, doubling cleanly to 200W into 4 ohms - a textbook power doubling indicating a robust, well-regulated power supply. Gain is 26dBu. Frequency response spans an extraordinarily wide 10Hz to 150,000Hz within plus-or-minus 3dB. Signal-to-noise ratio is 90dB, with total harmonic distortion plus noise under 0.05% with full global feedback. At 254 x 152 x 381mm and 13kg, the KWA 99 maintains a manageable footprint for a monoblock amplifier.
Sound and use context
Expect the rich, harmonically engaging tonal character ModWright's hybrid tube-and-solid-state engineering approach is broadly known for, with the clean power doubling into 4 ohms suggesting genuine authority across a wide range of loudspeaker impedances.
Pairing
The clean power doubling into 4 ohms suits a wide range of loudspeaker sensitivities and impedances.
Alternatives
ModWright Instruments' broader amplifier catalogue offers alternatives for buyers wanting a different power output within the same considered hybrid engineering philosophy.
Key specs that matter
Output power is 100W into 8 ohms, doubling cleanly to 200W into 4 ohms - a textbook power doubling indicating a robust, well-regulated power supply. Gain is 26dBu. Frequency response spans an extraordinarily wide 10Hz to 150,000Hz within plus-or-minus 3dB. Signal-to-noise ratio is 90dB, with total harmonic distortion plus noise under 0.05% with full global feedback. At 254 x 152 x 381mm and 13kg, the KWA 99 maintains a manageable footprint for a monoblock amplifier.
Sound and use context
Expect the rich, harmonically engaging tonal character ModWright's hybrid tube-and-solid-state engineering approach is broadly known for, with the clean power doubling into 4 ohms suggesting genuine authority across a wide range of loudspeaker impedances.
Pairing
The clean power doubling into 4 ohms suits a wide range of loudspeaker sensitivities and impedances.
Alternatives
ModWright Instruments' broader amplifier catalogue offers alternatives for buyers wanting a different power output within the same considered hybrid engineering philosophy.
Specifications
Model name
KWA 99
Input sensitivity (mV)
N/A
Input impedance (balanced) (Ω)
N/A
Input impedance (single-ended) (Ω)
N/A
Output impedance (balanced) (Ω)
N/A
Output impedance (single-ended) (Ω)
N/A
Max current (A)
N/A
Output power (8Ω) (W)
100
Output power (4Ω) (W)
200
Gain (dBu)
26
Frequency response low +/- 3dB (Hz)
10
Frequency response high +/- 3dB (Hz)
150 000
Signal to Noise Ratio (dB)
90
Total Harmonic Distortion + Noise (0% global feedback) (%)
N/A
Total Harmonic Distortion + Noise (100% global feedback) (%)
<0.05
Max power consumption (W)
N/A
Damping factor
N/A
Dimensions (mm)
254 x 152 x 381
Weight (kg)
13
Official link