1. OVERVIEW
Steel S7.4
Professional Power Amplier
Steel S7.4 is a professional power amplier 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 delity, Steel S7.4 is equipped with
a switching-mode power supply. Precisely thanks
to the design of its power supply, the amplier
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 amplier.
As one would expect in ampliers of this range, the
whole Steel series is equipped with a very ecient
ventilation and has a comprehensive section of
protections, to assure its correct operation in the
most demanding situations.
Specications
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%
• 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/o 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.
English version
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