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LD Premium LDSP44K 4-Channel Power Amplifier
The LDSP44K is a professional 4-channel power amplifier offering amazing value and versatility in a compact lightweight Class H design. Suitable for touring and installation sound reinforcement it delivers a maximum of 4x 980W into 2Ohms and 2x 1.960 in 4Ohms stereo bridge mode.
Featuring a high efficiency switch mode power supply the LDSP44K provides a 20Hz – 20kHz bandwidth with low THD and crosstalk, a damping factor higher than 500, excellent S/N ratio and 3 switchable sensitivity levels.
Reliable performance is ensured by heavy duty engineering, high quality components and comprehensive protection including soft start with turn-on muting, PMS™ power management, SSP™ (Safe operation Sentry Protection) and ICL™ (Intelligent Clip Limiting) to maintain signal integrity. Protection circuits against DC, thermal and power supply overload are implemented. A switchable subsonic filter and a 3-position gain switch offer variable amplifier adjustment.
- Type: Professional Power Amplifier
- Model Name: SP44K
- Output Power 1 kHz,
- 2 ohms 4 x 980 W
- 4 ohms 4 x 670 W
- 8 ohms 4 x 430 W
- Bridge 4 ohms 2 x 1960 W
- Bridge 8 ohms 2 x 1340 W
Output Circuity: Class H
Frequency Range: 20 Hz - 20 kHz THD: S/N Ratio: 113 dB Damping Factor: >500 Crosstalk: > 75 dB Voltage Gain: 26 / 32 / 38 dB Input Sensitivity: 3.0 / 1.5 / 0.8 V Input Impedance: 20k ohm (balanced) / 10k ohm (unbalanced) Protection: Soft-start, Turn-off transients, Muting at turn-on, Over-heating, DC, RF, Short circuit, Open or mismatched loads, Overloaded power supply, ICL Clip Limiter, PMS, SSP
Controls: On/Off, Volume, Voltage Gain, Dual / Link switchable, Bridge / Stereo configuration switch Indicators: Signal, Temp, PMS (Power Management System), ICL (Intelligent Clip Limiting) Connectors: Input: XLR / Output: Neutrik Speakon Cooling System: 2 x continuously variable speed fan, rear to front
Power Supply: AC~230V / 50 Hz
Power Consumption Full Load: 13.5 A Dimensions (W x H x D): 483 x 89 x 310 mm |
High-tech in professional amplification!
The fP 2400Q is a lightweight and space-saving four-channel power amplifier, ideal for
use in high quality touring sound systems as well as in demanding permanent installations.
The fP 2400Q offers a diverse choice of applications, such as: multi-channel monitor
systems, four-channel reproduction, and compact amplification in active 2-, 3-, and 4-way
systems.
The fP 2400Q makes possibile the bridge connection of one or two of the two pairs of
channels (channel A and B and/or channel C and D). It also features Lab.gruppen?s unique
power matching solution, the MLS switch, which offers endless combinations for solving
most of the problems related to varying impedances and maximum power capacities of
loudspeakers. The latest semiconductor technology is utilized in the new ferrite Power (fP)
amplifiers.
This, together with Lab.gruppen?s proprietary copper cooling system, Intercooler?, enhances
the 2 ohms capacity. Two easily accessible dust filters on the front ensure a clean front-to-rear
airflow. Additionally, a new Bi-phase wiring scheme also increases the capacity of the switch
mode power supply. This extends the power bandwidth in the low end.
Key Features:
4 x 370 watts @ 8 ?
4 x 380 watts @ 4 ?
4 x 500 watts @ 2 ?
(Measured just below clip level, with all 4 channels driven)
Light weight and compact: only 8.6 kg (19lbs), 2U high
MLS? Switch: Lab.gruppen?s unique power matching for different loads
New Features:
Replaces the LAB 1200C
Easily accessible dust filters
Improved low-end power bandwidth
Extruded front panel for increased stability
Besides the traditionally superb Lab.gruppen sonic performance, there is a full line of features
to make the fP family functional in all situations from installation to high performance live
sound systems:
Regulated switch mode power supply
Today there are many lightweight, switch-mode amplifiers in the market. However, the unique
Lab.gruppen switch-mode power supply technology offers a number of essential advantages
that make it superior to other and seemingly similar power supply designs. The most important
features are the regulated power supply and the extreme power efficiency. The regulated power
supply easily deals with a very high variation in the AC mains voltage: it can drop by up to 20%
below its nominal level - e.g. to 180 V instead of 230 V ? without any problem. Perhaps even
greater benefits result from the extreme efficiency of Lab.gruppen amplifiers: only a fraction of the
energy from the AC mains is turned into heat.
A regulated power supply also presents some other sonic advantages, such as better cone control
and the same fast response as a conventional power supply.
Sophisticated protection circuitry, combining:
ALS? short circuit protection; the Adaptive Limiting System permits very high peak currents, but
keeps the amplifier within the Safe Operation Area
DC protection; protects against infrasonic signals
VHF protection; protects the loudspeakers against strong very high frequency non-musical signals
above the audible range
Thermal protection; prevents the amplifier from being overheated. The protection indicators on the front
panel are switched on, as a warning, before the protection process is initiated
AC protection; shuts down the power supply if the line voltage is outside the operating voltage
Clip limiter; prevents severely clipped waveforms from reaching the loudspeakers, whilst maintaining
full peak power. | The S Series of RAM Audio amplifiers distils all these 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 S Series amps, you'll find five 2-channel models and five 4-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. • Ultra-compact and lightweight 2-U high • Laser cut aluminum front panels with integrated carrying handles • Neutrik® XLR input connectors, input and signal link in 2 channel models • Input Link switch: allow daisy-chaining of the input signal • Neutrik® Speakon® output connectors • Detented sealed potentiometers for easy recall of volume settings • ICL™, PMS™, Hi-temp, Signal indicators per channel • Power on and Stand-by leds • Highly versatile with multiple configuration and additional module options • Full PC control via EtheRAM (with EtheRAM Control module) • Switchable ICL™ clip-limiters per channel • Switchable (30-50 Hz) sub-sonic highpass filter per channel • Three-position gain selector (26, 32 or 38 dB) • Dual or bridge mode selector • Twin temperature controlled, back to front cooling fans • Oversized power components (high SOA reserve specification) Standard Signal Inputs Module: The S Series amps are equipped as standard with twin Neutrik® XLR, doubled by two other XLR connectors for linking purposes. In the 4 Channel models an XLR input per channel is provided with the signal linking facility. Analog Processor Module: permits a very easy, user-friendly signal processing to enable the amp to set up a bi-amp system without any other outboard device. These are the Processor's main characteristics: • 2-way stereo crossover (dual mono or single bridged sub output) • 24dB/oct Linkwitz-Riley configurable crossover (90, 100 o 120Hz) • Adjustable attenuation in the High-pass outputs (-3, -6 or -9dB) • Adjustable Limiter, relative to Max. Output (-3, -6 or -9dB) DSP44_S Module: Digital Signal Processor fully programmable through an USB port. These are the Processor's main characteristics: • 4 Inputs/4 Outputs or 2 In/2 Out free route configurable. • 24 bits/192 kHz 256x Oversampling Converters. • Output Delay: 0 to 7.1 meters (20.69ms) per channel. • XOver: Up to 48dB/oct Butterworth, Linkwitz-Riley and Bessel. • EQ: 9 filters per channel (Parametric, Shelving, LP,HP,BP,SB). • Gain, Mute and Phase inversion per channel. • RMS Power and Peak Voltage output limiter per channel. • Real Time operation from USB or front panel configuration. Standard Signal Inputs Module EtheRAM Control Module Ethernet Audio Transport (Coming soon) Analog Processor Module DSP44_S Module EtheRAM Control Module AES/EBU Digital Input (Coming soon)
| OUTPUT POWER |
S-1500 |
S-2000 |
S-3000 |
S-4000 |
S-6000 |
S-3004 |
S-4004 |
S-4044 |
S-6004 |
S-6044 |
| 1kHz, 1.0% THD |
| 2 ohms |
2x880W |
2x1190W |
2x1570W |
2x1950W |
2x2950W |
4x700W |
4x980W |
- |
4x1440W |
- |
| 4 ohms |
2x575W |
2x790W |
2x1100W |
2x1380W |
2x2025W |
4x500W |
4x670W |
4x975W |
4x1000W |
4x1480W |
| 8 ohms |
2x325W |
2x460W |
2x630W |
2x810W |
2x1250W |
4x300W |
4x430W |
4x690W |
4x620W |
4x1015W |
| Bridge @ 4ohms |
1760W |
2380W |
3140W |
3900W |
5900W |
2x1400W |
2x1960W |
- |
2x2880W |
- |
| Bridge @ 8ohms |
1150W |
1580W |
2200W |
2760W |
4050W |
2x1000W |
2x1340W |
2x1950W |
2x2000W |
2x2960W |
| P. N. 12dB C.F. |
| 2 ohms |
2x975W |
2x1360W |
2x2060W |
2x2460W |
2x4225W |
4x890W |
4x1170W |
- |
4x2080W |
- |
| 4 ohms |
2x610W |
2x880W |
2x1240W |
2x1600W |
2x2600W |
4x580W |
4x820W |
4x1230W |
4x1280W |
4x2110W |
Frequency Response (power bandwidth ±0.25dB): 20Hz-20kHz Phase Response (@1W 20Hz-20kHz): ±15deg Total Harmonic Distortion (20Hz-20kHz): Intermodulation Distortion (SMPTE): Crosstalk (20Hz-20kHz): >75dB Voltage Gain (selectable): 26/32/38 dB Sensitivity: 1500:2.6/1.3/0.6V 2000:3.0/1.5/0.8V 3000:3.6/1.8/0.9V 4000:4.0/2.0/1.0V 6000:5.0/2.5/1.3V 3004:2.6/1.3/0.6V 4004:3.0/1.5/0.8V 4044:3.7/1.9/0.9V 6004:3.5/1.8/0.9V 6044:5.0/2.5/1.3V Signal to noise ratio: 1500:112dB 2000:113dB 3000:115dB 4000:116dB 6000:118dB 3004:112dB 4004:113dB 4044:116dB 6004:116dB 6044:118dB Required AC Mains (@4ohms 1/8 r.p.): 1500:4A 2000:4.8A 3000:6.2A 4000:7.5A 6000:10.5A 3004:6A 4004:7.5A 4044:11A 6004:10.5A 6044:15A Dimensions (WxHxD): 483x88.9x310 mm - 19x3.5x12.2 inches Weight (Net): 1500/2000: 8Kg - 17.6Lbs 3000/4000/3004/4004/4044: 8.5Kg-18.7Lbs 6000/6004/6044: 8.6Kg-18.9Lbs Protections: 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™, PMS™, SSP™ |
• Eight and four channel models with 300W and 150W per channel
• Minimal footprint and mass arround 200mm depth and 6 Kg
• Optional Add-on card to interface with third party alarm systems with GPIO connections
• FCM™ Faulty Channel Management system to avoid entire device shutdown
• State-of-the-art layout for maximum performance and reliability
• Highly oversized thermal dissipation design for maximum reliability
• Superb distortion and noise figures
• All channels bridgeable by pairs
• Selectable gain in four channel groups (26, 32 and 38dB)
• Subsonic filter per channel (35Hz user selectable)
• Temperature and signal dependant, intelligent cooling system for minimal
noise
• Optimal heat extraction due to the air tunneled enclosure and insulator-less
power device attachment to the heatsink
• Direct connector-less output for maximum quality loudspeaker control
• High grade engineering inside with the latest SMD technology
• Balanced Inputs with 0.1% tolerance resistors for a precise noise rejection
• Critical electronic and mechanical parts selection
• Innovative protection systems, FCM™ Faulty Channel Management and SSP™
SOA Sentry Protection
• Detented and optionally tamper-proof volume potentiometers
• Hi efficiency, two steps Class H Audio topology
• Protection, Signal and Clip indicators per channel
• Power On and Standby general indicators
• Extremely compact, fully featured QuantaPulse Power supply
• Low current consumption and heat generation allowing less demanding
conditions for multiple amplifier installations
• Factory preset worldwide mains voltage power supply
• Laser cut four milimeters aluminium front panel
• Rugged 2U steel chasis
|
OUTPUT POWER |
T-604 |
T-1204 |
T-1208 |
T-2408 |
| RMS, 1kHz, 1.0% THD+N |
|
|
|
|
| 4 ohms |
4x 160 W |
4x 320 W |
8x 150 W |
8x 300 W |
| 8 ohms |
4x 115 W |
4x 220 W |
8x 100 W |
8x 195 W |
| Bridge @ 8ohms |
2x 320 W |
2x 640 W |
4x 300 W |
4x 600 W |
| Pink Noise 12dB CF |
|
|
|
|
| 4 ohms |
4x 210 W |
4x 415 W |
8x 180 W |
8x 370 W |
Frequency Response (power bandwidth ±0.25dB): 20Hz-20kHz
Phase Response (@1W 20Hz-20kHz): ±15deg
Total Harmonic Distortion (20Hz-20kHz):
Intermodulation Distortion (SMPTE):
Crosstalk (20Hz-20kHz): >70dB
Voltage Gain (selectable): 26/32/38 dB
Sensitivity: T604:1.5/0.8/0.4V - T1204:2.1/1.0/0.5V - T1208:1.4/0.7/0.4V - T2408:2.0/1.0/0.5V
Signal to noise ratio: T604:107dB - T1204:110dB - T1208:107dB - T2408:110dB
Required AC Mains (@8ohms 1/8 rated power): T604:1A - T1204:1.5A - T1208:1.4A - T2408:2.6A
Dimensions (WxHxD): 483x88.9x210 mm - 19x3.5x8.27 inches
Weight (Net): T604/T1204: 5.4Kg - 11.8Lbs T1208/T2408: 6.2Kg-13.5Lbs
Protections: Soft-start, Turn-on Turn-off muting, Over-heating, DC, RF, Short-circuit, Open or mismatched loads, Overloaded power supply, SSP™ and FCM™ |
|
| PA Power Amplifier 4 x 160 W 4 Ohms
Multichannel Power with Minimum FootprintThe T Series multichannel power amplifiers have been designed especially for installation and networked audio systems.
T Series amplifiers* are available with 4 and 8 discrete channels and output ratings from 160 to 320 Watts per channel providing optimum solutions for multizoning. They feature Euroblock inputs, terminal strip outputs and a rugged 2U rackmountable chassis with 4 mm front panel.
*Also available as GPIO versions with remote and emergency paging switchin
Main Features
- 8 and 4-channel models with 300 and 150 Watts (RMS) output power per channel
- compact 2U rackmountable chassis, 220 mm deep, weight 6 kg only
- GPIO versions for remote and emergency paging switching
- FCM system
- oversized heat dissipation system for maximum thermal stability
- low THD and high S/N ratio
- all channels bridgeable in pairs
- switchable input gain (26, 32 and 38 dB)
- subsonic filters for each channel (35 Hz)
- intelligent, quiet fan cooling system
- terminal strip loudspeaker connectors
- PCBs with surface-mount technology (SMT) for increased reliability
- balanced inputs with superior noise rejection
- select high-quality components only
- ICL intelligent clip limiters for each channel
- recessed volume controls (optional SC-T perspex guard)
- high-efficiency two-stage Class H design
- protection, signal, clip, power on and standby LED indicators for each channel
- compact QuantaPulse power supply
- multi-voltage: automatic voltage converter for worldwide use, no switching required
- protections: soft start, turn on/turn off muting, thermal overload, DC, RF, short circuit, open circuit, load mismatch and power supply overload
ICL™: improved Intelligent Clip Limiting prevents loudspeaker damage while maintaining audio quality and punch under clipping conditions.
FCM™: the Faulty Channel Management system prevents overall amplifier shutdown.
GPIO:General-Purpose-I/O-Port
QuantaPulse™ Technology: The Soft Switching Resonant QuantaPulse Power Supply is designed to provide plenty of power when needed monitoring the necessary parameters of voltage and current for a controlled performance at all times. Bi-directional data flow between the power supply and power amp module. Two very important characteristics of the QuantaPulse power supply are the optimization against over-voltages and superior reliability.
• Eight and four channel models with 300W and 150W per channel
• Minimal footprint and mass arround 200mm depth and 6 Kg
• Optional Add-on card to interface with third party alarm systems with GPIO connections
• FCM™ Faulty Channel Management system to avoid entire device shutdown
• State-of-the-art layout for maximum performance and reliability
• Highly oversized thermal dissipation design for maximum reliability
• Superb distortion and noise figures
• All channels bridgeable by pairs
• Selectable gain in four channel groups (26, 32 and 38dB)
• Subsonic filter per channel (35Hz user selectable)
• Temperature and signal dependant, intelligent cooling system for minimal noise
• Optimal heat extraction due to the air tunneled enclosure and insulator-less power devices attachment to the heatsink
• Direct connector-less output for maximum quality loudspeaker control
• High grade engineering inside with the latest SMD technology
• Balanced Inputs with 0.1% tolerance resistors for a precise noise rejection
• Critical electronic and mechanical parts selection
• Innovative protection systems, FCM™ Faulty Channel Management and SSP™ SOA Sentry Protection
• Detented and optionally tamper-proof volume potentiometers
• Hi efficiency, two steps Class H Audio topology
• Protection, Signal and Clip indicators per channel
• Power On and Standby general indicators
• Extremely compact, fully featured QuantaPulse Power supply
• Low current consumption and heat generation allowing less demanding conditions for multiple amplifier installations
• Factory preset worldwide mains voltage power supply
• Laser cut four milimeters aluminium front panel
• Rugged 2U steel chasis
Frequency Response (power bandwidth ±0.25dB): 20Hz-20kHz
Phase Response (@1W 20Hz-20kHz): ±15deg
Total Harmonic Distortion (20Hz-20kHz):
Intermodulation Distortion (SMPTE):
Crosstalk (20Hz-20kHz): >70dB
Voltage Gain (selectable): 26/32/38 dB
Sensitivity: T604:1.5/0.8/0.4V - T1204:2.1/1.0/0.5V - T1208:1.4/0.7/0.4V - T2408:2.0/1.0/0.5V
Signal to noise ratio: T604:107dB - T1204:110dB - T1208:107dB - T2408:110dB
Required AC Mains (@8ohms 1/8 rated power): T604:1A - T1204:1.5A - T1208:1.4A - T2408:2.6A
Dimensions (WxHxD): 483x88.9x210 mm - 19x3.5x8.27 inches
Weight (Net): T604/T1204: 5.4Kg - 11.8Lbs T1208/T2408: 6.2Kg-13.5Lbs
Protections: Soft-start, Turn-on Turn-off muting, Over-heating, DC, RF, Short-circuit, Open or mismatched loads, Overloaded power supply, SSP™ and FCM™ |
Model CT475
Product Type Amplifier
Channels 4
Sensitivity 1.4V
Rated Power Output 75W per Channel into 8 ohms
Signal to Noise Ratio (below rated power 20Hz to 20kHz, A-Weighted 110dB
Total Harmonic Distortion (THD) (full rated power, 20Hz - 20kHz)
Intermodular Distortion (from 0dB down to -40dB)
Frequency Response (at 1W into 4/8 ohms) ± 0.5dB
Crosstalk (below rated power 20Hz to 1kHz) > 70dB
Common Mode Rejection (20Hz to 1kHz) > 55dB, typically > 70dB
Dimension (H x W x D) 1.75" x 19" x 14.25“
Weight 10 lbs (4.5 kg)
Shipping Weight 15 lbs (6.8 kg)
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