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Measurement Evolution 302 Amplifier Evolution 402 Amplifier
FREQUENCY RESPONSE 20 Hz to 20 kHz +0, –0.10 dB
<0.5 Hz to 180 kHz +0, –3 dB
20 Hz to 20 kHz +0, –0.18 dB
<0.5 Hz to 120 kHz +0, –3 dB
SIGNAL-TO-NOISE RATIO
Wideband, unweighted, referred to full
power output
“A” weighted
>107 dB
>117 dB
>106 dB
>116 dB
GAIN 25.5 dB 25.4 dB
TOTAL HARMONIC DISTORTION <0.02% at 1 kHz, at 300 W, 8 Ohms
<0.15% at 20 kHz, at 300 W, 8 Ohms
<0.02% at 1 kHz, at 400 W, 8 Ohms
<0.15% at 20 kHz, at 400 W, 8 Ohms
INPUT IMPEDANCE
Single-ended
Balanced
CAST
100 kOhms
200 kOhms
75 Ohms
100 kOhms
200 kOhms
70 Ohms
INPUT SENSITIVITY
Single-ended or balanced
CAST
2.60 V rms
2.60 mA rms
3.04 V rms
3.04 mA rms
OUTPUT POWER
All channels driven
300 W rms at 8 Ohms
600 W rms at 4 Ohms
1200 W rms at 2 Ohms
400 W rms at 8 Ohms
800 W rms at 4 Ohms
1600 W rms at 2 Ohms
OUTPUT VOLTAGE 139 V peak-to-peak
49 V rms
160 V peak-to-peak
57 V rms
OUTPUT CURRENT 35 A peak 37 A peak
SLEW RATE 120 V/µs 100 V/µs
OUTPUT IMPEDANCE <0.040 Ohms at 20 Hz
<0.053 Ohms, 20 Hz to 20 kHz
<0.055 Ohms at 20 Hz
<0.064 Ohms, 20 Hz to 20 kHz
DAMPING FACTOR
Referred to 8 Ohms
>200 at 20 Hz
>150, 20 Hz to 20 kHz
>145 at 20 Hz
>125, 20 Hz to 20 kHz
POWER CONSUMPTION
Stand-by
Idle
Maximum
150 W
320 W
3400 W
370 W
570 W
3800 W
HEAT OUTPUT
Stand-by
Idle
Maximum
510 BTU/hr
.
1100 BTU/hr
.
5500 BTU/hr.
890 BTU/hr
.
1300 BTU/hr
.
6400 BTU/hr.
INPUTS 2 single-ended via RCA connector
2 balanced via XLR connector
2 CAST via 4-pin bayonet connector
2 single-ended via RCA connector
2 balanced via XLR connector
2 CAST via 4-pin bayonet connector
OUTPUTS 2 pairs Kr
ell binding posts
2 pairs Kr
ell binding posts
DIMENSIONS 17.3 in. W x 9.8 in. H x 20.7 in. D
438 mm W x 248 mm H x 525 mm D
17.3 in. W x 9.8 in. H x 22.1 in. D
438 mm W x 248 mm H x 550 mm D
WEIGHT
Shipping
Unit only
138 lb., 62.4 kg
120 lb., 54.3 kg
150 lb., 67.9 kg
135 lb., 61.1 kg
All operational features, functions, specifications, and policies are subject to change without notification.
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