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1. OVERVIEW
Steel S7.4
Professional Power Amplifier
Steel S7.4 is a professional power amplifier with a
maximum output power of 4 x 670W @ 8-ohm / 4
x 1030W @ 4-ohm and a maximum bridged output
power of 2 x 2300W (RMS) @ 8-ohm. With a per-
formance that stands out for its very low distor-
tion and high fidelity, Steel S7.4 is equipped with
a switching-mode power supply. Precisely thanks
to the design of its power supply, the amplifier
allows the peak power to follow the dynamic range
of the musical program, being able to reproduce
up to twice the RMS power, without clipping. This
translates, basically, into peaks with much more dy-
namic range than a conventional-source amplifier.
As one would expect in amplifiers of this range, the
whole Steel series is equipped with a very efficient
ventilation and has a comprehensive section of
protections, to assure its correct operation in the
most demanding situations.
Specifications
Output
•
Rated output power (8-Ohm): 4 x 670W
•
Rated output power (4-Ohm): 4 x 1030W
•
Rated output power (Bridge @ 8-Ohm): 2 x
2300W
Performance
•
Input impedance:
•
Balanced: 20Kohm
•
Unbalanced: 10Kohm
•
Input sensitivity: 0.775Vor1.4V
•
Frequency Response: 20Hz~20KHz
•
THD: <0.05%
P. 2
AUDIOLAB STEEL SERIES -
English version
•
Damping factor (8-ohms) 10Hz-400Hz: >200
•
Crosstalk (at 1Khz): - 75dB
•
Signal to noise ratio: >100dB
•
Slew rate: 20V/us
•
Voltage gain: 35.5dB
•
Intermodulation distortion: =/<0.35%
•
Protections: Thermal, short circuits, no-load,
on/off muting & RF interference
Connectors & back panel controls
•
Power supply connector: Interlock In
•
4 XLR-3 inputs
•
4 Speakon speaker outputs
•
Bridge, parallel & input sensibility switch
Physical
•
Cooling: Two Front-to-back fans, tempera-
ture controlled speed.
•
Net Weight: 8 kg. / 17.6 lbs.
•
Dimensions: 482x227x88 mm. / 19x8.9x3.5
in.
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