The Horizon Series uses the company’s patented circuitry to provide unprecedented power in a single rack space package. Its austere case is no indication of the sophisticated design that lies inside.
A large PCB spans the full width of the rugged steel chassis, housing the power supply and extensive filtering components required by a switch-mode amplifier whilst a low-profile cooling fan draws air through the back panel and forces it through a channel shaped heatsink, exhausting it through a front-panel vent.
W Audio placed all the control functions conveniently on the front panel. Two solid-feeling knobs adjust each channel’s input sensitivity whilst front panel LEDs indicate the amplifiers operational and signal level status. The rear panel accepts a wide variety of input and output connectors including Jack, XLR and Speakon.
Tremendous headroom in either bridged mono or stereo modes offers a punchier and tight bottom end and dynamics are effortless at high volumes, with crisp and snappy transients. The fan speed with no signal present idles slowly, but it speeds up immediately to match the demand of even moderate signal levels, returning to idle the instant as soon as demand is reduced.
Pound for pound the Horizon Series punches well above its own weight.
Stereo power: 2 x 430W @ 8ohms
Stereo power: 2 x 650W @ 4ohms
Bridge power: 1300W
THD+N: <0.1% (stereo 4ohms)
IMD: < 0.1% (stereo 4ohms)
Frequency response: 20Hz ~ 20KHz +0dB, -1.0dB
Input sensitivity: 0.775V/1.0V/1.44V (stereo 8ohms)
S/N ratio: > 100dB (stereo 4ohms)
Crosstalk >65dB (stereo 4ohms)
Phase responce: +15, -15 (stereo 4ohms)
Damping factor: >200 (@ 8ohms)
Protection: Soft start up, short circuit, DC fault, over heat, over load, AC line fuse and limit
Indicators: 3 LED power (signal, limit & protection)
Connections: In – 1/4 stereo 6.3 phone-jack/XLR female, Out – 4-Pin speakon
Slew rate: > 20v/ms
Dimensions: 483 x 403 x 44mm (19″, 1U)