Digital Switching mode amplifier

Rock-solid, ultrastable output power set record marks in terms of flexibility, efficiency and practical use. Whole amp racks of multiple conventional power amplifiers with switching power supplies may be reduced to a mere one to three LEX Class D Digital amplifiers. Apart from these "hard" benefits, they offer many more advantages such as a strikingly audiophile sound reproduction with very precise, deep lows and a superb resolution of midrange and high frequencies.

The fact that LEX develops and builds amplifiers in top-notch quality is almost uncompromising component selection and a circuit design based on criteria of aerospace technology ensure utmost reliability.

FEATURES

Ø Switch-mode power supply for high performance and compact size

Ø Class D (digital) output for extremely high efficiency because of less current consumption and heat dissipation

Ø Easily handles 2-ohm loads all night long

Ø Variable speed fan for low noise

Ø Balanced XLR audio input / Speakon Speaker output

Ø Switch for mono and stereo

Ø Comprehensive front panel indicators including signal (SIG), clip (CLIP), active (ACT) and, protect (PRO)

Ø Fully protected circuit design including DC, infrasonic, high frequency, thermal overload and short circuit

Ø Clip limiter - prevents severely clipped waveforms from reaching the loudspeakers, whilst maintaining full peak power

Ø DC protection - protects against infrasonic signals

Ø VHF protection - protects the loudspeakers against strong very high frequency non-musical signals above the audible range.

Ø Thermal protection - prevents the amplifier from being overheated.

Ø Compact size - only 1 U for reduced rack cost and space

Ø Light weight - only 9 kg for easier racking and shipping (bigger power model)

SPECIFICATIONS 　
STEREO MODE LD450 LD650 LD800 LD1000
8ohms (RMS/THD 1%) 450Wx2 650Wx2 900Wx2 1100Wx2
4ohms (RMS/THD 1%) 800Wx2 1200Wx2 1500Wx2 1700Wx2
2ohms (MAX) 1600Wx2 2300Wx2 2800Wx2 3400Wx2
BRIDGE MONO MODE 　 　 　 　
8ohms n/a n/a n/a n/a
4ohms n/a n/a n/a n/a
　 　 　 　 　
Signal to Noise >95dB
Input Sensitivity 1.1v
Gain 8homs 38dB
Output Circuitry CLASS D
Distortion Less than 0.02%
Frequency Response 10Hz-40KHz 8ohms ±0.5dB
Damping Factor () >600
Input Impedance Balanced 20K/ Unbalanced 10K
Switching Rate 50V/us
High Filter n/a
Cooling Variable-speed fan, rear-to-front air flow
Input Connectors, each channel XLR male & female
Output Connectors, each channel speakon
Rear Panel Swithches mono/stereo
Front Panel Controls Gain Attenuator: 0 to ∞ dB Power On/Off
Front Panel Indicators Protect (PRO),CLIP (CLIP),Signal (SIG) and Active (Act)
Protection 　 　 　 　
Amplifier Protection Full short circuit, thermal, infrasonic, ultrasonic,VHF,gradually
Load Protection DC fault power supply,switching power supply under voltage
Infrasonic -3 dB, 5 Hz
DC fault Power supply shutdown
Ultrasonic -3 dB, 85 kHz
Short Circuits active clip limiting, recover after limiting
Thermal no output at 95°C, re-work less than 95°C
Over Current auto limit
PHYSICAL 　 　 　 　
SHIPPING WEIGHT (kgs) 11.5 12.5
SHIPPING SIZE ( WxDxH mm) 504x560x95 565x560x95