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Integrated amplifiers — ModWright Instruments KWH 225i
Description, images, technical data and specifications
ModWright Instruments KWH 225i
Image source — © ModWright Instruments
The KWH 225i is an integrated amplifier from ModWright Instruments, an American manufacturer known for combining tube-influenced circuit design with substantial solid-state power delivery. The KWH 225i brings that hybrid approach to a complete integrated chassis.
Key specs that matter
One balanced XLR input and three single-ended RCA inputs are provided. Input sensitivity is 2,000mV, with input impedance at 20k ohms on both connection types. Output power is 225W into 8 ohms, rising to 400W into 4 ohms. Gain is 30dBu. Frequency response spans a wide 20Hz to 100,000Hz within plus-or-minus 3dB. Total harmonic distortion plus noise is held under 0.04%. At 450.8 x 445.5 x 165.1mm and 29.03kg, the KWH 225i represents a substantial integrated amplifier commitment.
Sound and use context
Expect the engaging, hybrid tube-influenced character ModWright's broader design philosophy is known for, combined with substantial 225/400W solid-state-level output capability - this combination suggests genuine tonal warmth alongside real dynamic authority.
Pairing
The substantial 225/400W output suits a wide range of loudspeaker sensitivities and impedances, and the balanced input with high 20k ohm impedance eases compatibility with a variety of source components.
Alternatives
ModWright Instruments' broader amplifier and phono stage catalogue, including the PH 150, offers natural companion components for buyers building a coherently voiced, entirely ModWright-based system.
Key specs that matter
One balanced XLR input and three single-ended RCA inputs are provided. Input sensitivity is 2,000mV, with input impedance at 20k ohms on both connection types. Output power is 225W into 8 ohms, rising to 400W into 4 ohms. Gain is 30dBu. Frequency response spans a wide 20Hz to 100,000Hz within plus-or-minus 3dB. Total harmonic distortion plus noise is held under 0.04%. At 450.8 x 445.5 x 165.1mm and 29.03kg, the KWH 225i represents a substantial integrated amplifier commitment.
Sound and use context
Expect the engaging, hybrid tube-influenced character ModWright's broader design philosophy is known for, combined with substantial 225/400W solid-state-level output capability - this combination suggests genuine tonal warmth alongside real dynamic authority.
Pairing
The substantial 225/400W output suits a wide range of loudspeaker sensitivities and impedances, and the balanced input with high 20k ohm impedance eases compatibility with a variety of source components.
Alternatives
ModWright Instruments' broader amplifier and phono stage catalogue, including the PH 150, offers natural companion components for buyers building a coherently voiced, entirely ModWright-based system.
Specifications
Model name
KWH 225i
Type
Integrated Amplifier
Analog inputs (balanced)
1
Analog inputs (single-ended)
3
Input sensitivity (mV)
2000
Input impedance (balanced) (Ω)
20 000
Input impedance (single-ended) (Ω)
20 000
Output impedance (balanced) (Ω)
N/A
Output impedance (single-ended) (Ω)
N/A
D/A conversion
N/A
Phono MM/MC current-sensing input impedance (Ω)
N/A
Output power (8Ω) (W)
225
Output power (4Ω) (W)
400
Gain (dBu)
30
Frequency response low +/- 3dB (Hz)
20
Frequency response high +/- 3dB (Hz)
100 000
Signal to Noise Ratio (dB)
N/A
Total Harmonic Distortion + Noise (%)
<0.04
Damping factor
N/A
Dimensions (mm)
450.8 × 445.5 × 165.1
Weight (kg)
29.03
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