Power Amplifiers

VLX-Series

VLX800, VLX1400

Completely conceptualized, designed and manufactured by AudioLotus, the VLX series are superior audio power amplifiers for professional applications.

Completely conceptualized, designed and manufactured by AudioLotus, the VLX series are superior audio power amplifiers for professional applications. Set in 1U, 19” rack standard, the VLX is integrated with a user selectable, Hi-Speed active-PFC (power factor correction) circuitry. This cleverly optimized active PFC circuitry results in up to twice the power output for similar consumption of peak input current/s, greatly reducing peak current demand drawn from the mains power supply. The user selectable PFC feature comes in handy when used in non-sinusoidal power supply environments such as UPS and DC power systems.

The design also boasts of a low-EMI ZVS (zero voltage switching) power supply and more significantly Class-AB power amplification – a feat never before brought into 1U production due shortcomings on the thermal front. The fact that Class-AB amplifiers have a far more linear response (load-independent) apart from their near-zero phase-error even at 20kHz (in contrast to Class-D amplifiers that tend to have load dependent phase errors) drove us to design a radically new layout to ensure cooler running.

  •  1U, lightweight design.
  • User selectable, Hi-Speed PFC circuitry.
  • Class AB power amplification for a proven linear response (amplitude and phase).
  • ZVS power supply design.
  • Continuously variable speed fans with thermal muting and hysteresis.
  • Industry standard XLR and NL4 Speakon for interconnecting.
  • Optional 20A PowerCON connection for mains.
  • Provision to lock gain structure in complex installations.
Parameter Conditions VLX800 VLX1400
Freq. Response rated power – 6dB, 8ohms 14Hz-20kHz, -0.5dB 19.5Hz-20kHz, -0.5dB
Rated output power both channels driven continuously N/A N/A
Stereo/parallel operation FTC 20Hz-20kHz 0.1% THD N/A N/A
8 ohms 195 watts 325 watts
4 ohms 305 watts 480 watts
EIA 1kHz 0.1% THD N/A N/A
8 ohms 210 watts 345 watts
4 ohms 315 watts 515 watts
2 ohms 470 watts 790 watts
Bridge mono operation FTC 20Hz-20kHz 0.1% THD N/A N/A
8 ohms 610 watts 960 watts
EIA 1kHz 0.1% THD N/A N/A
8 ohms 630 watts 1030 watts
4 ohms 940 watts 1580 watts
Voltage gain 32x (30dB) 40x (32dB)
Input sensitivity for rated power into 4 ohms 1.09v (+3.0 dBu) 1.10v (+3.0 dBu)
Input impedance 10.1k ohms bal., 20.2kohms unbal 10.1k ohms bal., 20.2kohms unbal.
Signal to Noise ratio 20Hz-20kHz, 8 ohm load better than 92dB better than 92dB
Distortion SMPTE-IM better than 0.02% better than 0.02%
THD 20Hz-20kHz: 8 ohms, 100watts less than 0.03% less than 0.03%
Damping factor <1kHz, 8ohms >280 >280
Power requirements N/A N/A N/A
Voltage 180~265Vac, 50/60Hz 1-ph, earthing mandatory 180~265Vac, 50/60Hz 1-ph, earthing mandatory
Instantaneous Current demand per cycle 230Vac 50Hz, PFC-ON N/A N/A
idling 0.15A rms 0.18A rms
4 ohm, typical 4.51A rms 6.13A rms
4 ohm, severe 4.90A rms 6.62A rms
Power plug and socket socket: Neutrik NAC3MPA socket: Neutrik NAC3MPA
plug: Neutrik NAC3FCA plug: Neutrik NAC3FCA
Weight Net 8.5kg (18.8lbs) 9.1kg (20.1lbs)
Shipping 8.9kg (19.7lbs) 9.5kg (21.0lbs)
Cooling 8x axial fans continuously variable rpm
Flow: front to rear
8x axial fans continuously variable rpm
Flow: front to rear
Connectors Input: 1×3-pin XLR per channel Input: 1×3-pin XLR per channel
Output: 1 x NL4 Speakon shared by both channels Output: 1 x NL4 Speakon shared by both channels

 

Specifications and appearance are subject to change without notice.

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