The Strumento N°4 mk2 Stereo Power Amplifier is a close to perfection state of the art two channel power amplifier that exhibits incredible response speeds (bandwidth greater than 1MHz), high output power (up to 900 Watts), and nearly unlimited speaker driving/control capability. For the mk2 version we’ve used our experience in designing its sibling the Strumento N° 8 Mono-block Power Amplifier as well as our trained human ears to aide us to further refine the original Strumento N°4 circuit (such small, but critical changes include the value of resistors and capacitors). This effort has allowed us to more closely achieve our goal of sonic perfection with the Strumento N°4 mk2, much like a luthier uses years of experience, craftsmanship, and keen ear to find the perfect tonal character and emotional response for their instruments.
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The Strumento N°4
Output power per channel Watts RMS @ 8/4/2 Ohm 250/500/900W
Gain 29 dB
Input sensitivity 1.41 Volts RMS
Frequency response (1W RMS -3dB) 0,3 Hz ÷ 1 MHz
Slew-Rate (@ 8 Ohm) > 200 V/µS
THD < 0,05 %
S/N Ratio 110 dB
Input impedance Unbalanced 7,5 kOhm
Balanced 7,5 kOhm
Damping factor (@ 8 Ohm) > 1000
Main voltage AC (50-60Hz) 100, 110-115, 220-230, 240 V
Stand-by Power consumption less than 1W
Nominal Power consumption (no signal) 400W
Power consumption (260W RMS @ 8ohm both channels driven) 1000W