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The new Audio 3-stage CLASS-H SMPS amplifiers incorporate all the features to meet all your needs, whether youʼre starting a P.A. amplifier project from scratch or just need to upgrade your present sound reinforcement equipment. In the amps, youʼll find 2 and 4 channel models, all offering high power levels at low distortion in the range 1.5 to 6 kW, yet weighing around 8.6 kg and only 30 cm deep.
- Model Name: SP2K4
- Output Power 1 kHz, 500
- Crosstalk (20 Hz - 20 kHz): > 75 dB
- Voltage Gain (selectable): 26/32/38 dB
- Input Sensitivity: 3.0 / 1.5 / 0.8 V
- Protection: Soft-start, Turn-on Turn-off transients, Muting at turn-on, Over-heating, DC, RF, Short-circuit, Open or mismatched loads, Overloaded power supply, ICL (Inteligent Clip Limiting), PMS (Power Management System), SSP (SOA Sentry Protection)
- Controls: On / Off Switch, Volume, Voltage Gain, Dual / Link Switchable, Bridge Mode Configuration Switch
- Indicators: Signal, Temperature, ICL (Inteligent Clip Limiting), PMS (Power Management System)
- Connectors:
- Input: 2 x XLR
- Line Output: 2 x XLR
- Speaker Output: 2 x Speakon
- Power Supply: 230 V - 50 Hz
- Dimensions (W x H x D): 483 × 88.9 × 310 mm
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The new LD Premium Audio CLASS-H SMPS amplifiers distils all the features to fulfill all your needs, whether youʼre starting a P.A. amplifier project from scratch, or you need to upgrade your present sound reinforcement equipment. In the LD Premium amps, you'll find four 2-channel models, all offering plentiful power levels at low distortion in the range of 1.5 to 6 kilowatts, yet weighing in around 8 kilos and 30 cm deep.
- Model Name: SP1K8
- Output Power 1 kHz, 500
- Crosstalk (20 Hz - 20 kHz): > 75 dB
- Voltage Gain (selectable): 26/32/38 dB
- Input Sensitivity: 2.6/1.3/0.6 V
- Protection: Soft-start, Turn-on Turn-off transients, Muting at turn-on, Over-heating, DC, RF, Short-circuit, Open or mismatched loads, Overloaded power supply, ICLTM, PMSTM, SSPTM
- Controls: On / Off Switch, Volume, Voltage Gain, Dual / Link Switchable, Bridge Mode Configuration Switch
- Indicators: Signal, Temperature, ICL (Inteligent Clip Limiting), PMS (Power Management System)
- Connectors:
- Input: 2 x XLR
- Line Output: 2 x XLR
- Speaker Output: 2 x Speakon
- Power Supply: 230 V - 50 Hz
- Dimensions (WxHxD): 483 × 88.9 × 310 mm / 19 × 3.5 ×12.2 inches
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The high efficiency of the ED series enables maximum efficiency with low heat generation.
A new and unique Class-H circuity technology using state of the art SMD Surface Mount Technology with a reduced number of components offering performance levels exceeding audiophile levels like a slew rate of 50V/µs and high-end extended dynamic sound. The 2U amplifier provides 2x550W into 4 Ohm is equipped complete with temperature-controlled fan cooling, all common protective circuits such as over-temperature, short circuit, RFI and soft start.
The integral soft clip limiter protects against damage to the connected loudspeakers, the activity of a protective circuit, signal and limiter are shown for each channel by LEDʼs.
| AMPLIFIER SPECIFICATIONS |
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| Power output stereo 4Ω: | 2 x 550 Watt rms | | | Power output stereo 8Ω: | 2 x 265 Watt rms | | | Power output bridged 8Ω: | 1100 Watt rms | | | Frequency Response: | 20 Hz ÷ 20 kHz | | | Signal/noise rate: | > 105 dB | | | Crosstalk: | > 70 dB | | | Distortion (THD+N): | | | | Intermodulation: | | | | Damping factor: | 200:1 (8 Ω) | | | Slew rate: | 50 V/μS | |
| INPUT SECTION |
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| Input connector: | 2 x XLR balanced, 6,3mm jack unbalanced | | | Input sensitivity: | 0 / 0.775 dBm/V RMS | | | Input impedance: | 10 kΩ | | | Controls: | Volume control for each channel | |
| OUTPUT SECTION |
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| Output connector: | 2 x Neutrik Speakon 4 ways | |
| SYSTEM PARAMETERS |
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| Cooling: | Two-speed fan | | | Protections: | Thermal, direct current, RFI, short circuit, transformer protection | | | Amplifier class: | H | |
| POWER REQUIREMENT |
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| Operating voltage: | 220÷240 / 110÷120 ~ 50 / 60 V ~ Hz | | | Max.current: | 10 A | | | Power Consumption: | 2200 W | |
| PHYSICAL SPECIFICATIONS |
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| Height: | 88 / 3.46 mm/inch | | | Width: | 483 / 19.01 mm/inch | | | Depth: | 350 / 13.77 mm/inch | | | Net Weight: | 15 / 33.06 Kg/Lbs | |
| SHIPPING INFORMATION |
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| Package height: | 120 / 4.72 mm/inch | | | Package width: | 540 / 21.25 mm/inch | | | Package depth: | 475 / 18.07 mm/inch | | | Shipping Weight: | 17 / 37.47 Kg/Lbs |
| L2400 750W-750W 4ohm (500W-500W 8ohm)
COMPACT MODERN DESIGN
Compact size (2U-Rack Height) with up to 1200W per channel@2ohms
these amps save valuable rack space without compromising power output.
HIGH CURRENT TOROIDAL TRANSFORMER
A high-current toroidal transformer saves rack space
and minimizes hum and noise.
EXCELLENT SOUND QUALITY
The low T.H.D.(0.05%) and high damping factor (400 or higher)
gives excellent sound quality.
2 STAGE POWER SUPPLY
The high-power units (L1800 and L2400) have a 2-Stage Class-H design
that maximizes their performance.
EQUIPPED WITH 30Hz or 50Hz HPF
All amplifiers are equipped with high-pass filters on each channel to
help maintain sound quality, yet help protect the loudspeakers.
EXTENSIVE PROTECTION CIRCUITS
Extensive protection circuits monitor over voltage/current conditions, overheating,
output shorts, and DC voltage to improve performance and reliability.
CLIP-LIMITER CIRCUITS
Clip-limiters on each channel are provided to help prevent
distortion due to excessive signal levels.
L.E.D FUNCTION DISPLAYS
Power, Clip limiter, Signal, Protection, Mode (Parallel/Stereo/Bridged)
LEDs on the front panel indicate the status of the unit in operation. | VLP Series Power Amplifier
Output Power:
750W RMS Per Channel @ 4 Ohms, 1kHz, 0.1% THD
500W RMS Per Channel @ 8 Ohms, 1kHz, 0.1% THD
(Bridge Mode, Mono)
1500W RMS @ 8 Ohms, 1K Hz, 1% THD
Total Harmonic Distortion: Less Than 0.1% (20Hz - 20kHz @ 8 Ohms)
Frequency Response: (+/-01db, @rated output Power, 8 Ohms): 20Hz - 20K Hz
Slew Rate: 15V Per usec
Damping Factor @ 8 Ohm: 300
Impedance: 20 Ohms balanced / 10 Ohms unbalanced
Cooling System: 2 indivdual fans
Special Features: High/Low Pass Filter / Input Sensitivity Selector / Ground Lift / Limiter
Dimensions (LxWxH): 14" x 19" x 3.5" / 360 x 482 x 88mm 2-rack mount spaces
Weight: 42 lbs. / 19 Kgs.
Special Features: High/Low Pass Filter; Input Sensitivity Selector; Ground Lift; Limiter |
- Signal to Noise (20 Hz - 20 kHz): 100 dB
- Input Sensitivity: 1.2 Vrms
- Voltage Gain (8 Ohms): 34.4 dB
- Output Circuitry: 2-tier Class H
- Power Requirements: 6A
- Frequency Response: 20 Hz - 20 kHz, +0, 1 dB
- Dynamic Headroom (4 Ohms): 2 dB
- Damping Factor: 100
- Input Impedance: Greater than 20k (balanced)
- Maximum Input Level: +24 dB (16 Vrms)
- Input Connectors (each channel): 3-pin XLR and 1/4-inch TRS, balanced, parallel Phono, unbalanced
- Output Connectors (each channel): Speakon, 1/4-inch, Binding Posts
- Amplifier and Load Protection: Short circuit, open circuit, thermal, RF protection Load protected against DC faults
- Rear Panel Controls: Full Range / Crossover switch
- Dimensions (H x W x D): 3.5 x 19 x 10.1 inches (89 mm x 483 mm x 257 mm)
- Weight: 26 lbs (12 kg)
Front Panel Controls and Indicators:
- Gain controls, 21 detents
- Red Clip LEDs, proportional, 0.1% THD threshold
- Green Signal LEDs, threshold -35 dB
- Blue Power LED, AC on ![]()
Stereo Mode:
- 8 Ohms / both channels driven: 500 Watts
- 8 Ohms / single channel driven: 600 Watts
- 4 Ohms / both channels driven: 700 Watts
- 4 Ohms / single channel driven: 850 Watts
Distortion:
- 8 Ohms: less than 0.05%
- 4 Ohms: less than 0.1%
Dimensions and Weight in Packaging
Shipping Weight: 31 lbs
Shipping Dimensions: 24 x 15 x 7 in
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