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By Halcro

Equinox

Two-chassis Stereo Preamplifier

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  • Two isolated chassis

    Audio circuitry separated from power and control electronics.

  • Balanced and current-mode outputs

    Flexible output modes with bridge-drive capability.

  • Precise analogue control

    −60 to +20 dB volume range in 0.5 dB steps.

  • Machined-metal construction

    Internally braced enclosures with custom isolation feet.

Product details

Halcro’s Equinox is a stereo line preamplifier that separates its audio circuitry from the power supply and control electronics. Its two machined-metal chassis can be arranged side by side or stacked.

Separate audio and control sections

A proprietary dual switch-mode supply operates above the audio band. The isolated audio enclosure, internally braced casework and custom isolation feet reduce interference and mechanical resonance.

Flexible analogue system control

Balanced XLR, unbalanced RCA and current-mode outputs support a wide range of power amplifiers. Bridge-drive modes, phase inversion, programmable inputs, trigger control and an audio ground-lift function provide flexible integration. Volume is adjustable from −60 dB to +20 dB in 0.5 dB steps using the front control or supplied remote. Available in a matte grey finish.

Specifications

Type
Stereo line preamplifier; separate Audio and Control chassis
Inputs per channel
4 × XLR balanced; 3 × RCA unbalanced
Outputs per channel
4 × XLR balanced voltage; 4 × RCA unbalanced voltage; 2 × RCA current mode
Bridge drive
Balanced, unbalanced and current-mode outputs
Volume range
−60 to +20 dB in 0.5 dB steps
Input impedance
20 kΩ + 20 kΩ balanced; 20 kΩ unbalanced
Output impedance
170 Ω + 170 Ω balanced; 170 Ω unbalanced; 30 kΩ current mode
Frequency response at 1 V
7 Hz–181 kHz (−1 dB); 3.3 Hz–352 kHz (−3 dB)
Channel separation
134 / 144 / 121 dB at 20 Hz / 1 kHz / 20 kHz
Channel balance
0.012 dB at 1 kHz
THD+N
0.0002% at 1 V output (product-page figure)
SNR at 1 V input/output
105 dB unweighted / 110 dB weighted
SNR relative to maximum output
118 dB unweighted / 123 dB weighted
Maximum output at 1 kHz
15.39 V balanced; 7.69 V unbalanced
Triggers
4 × 3.5 mm; level or pulse control
Controls
Front-panel rotary volume/mute and touchscreen; remote control
Power supply
Dual switch-mode; 100–240 V AC, 50–60 Hz
Power consumption
50 W maximum; <0.5 W standby

Dimensions

Audio chassis (W × H × D)
450 × 156 × 300 mm
Control chassis (W × H × D)
450 × 156 × 300 mm
Net weight
15 kg per chassis