| Content | LDMS828 - 19" Line Mixer 8 in 2 and Splitter 2 in 8
The LD Systems LDMS828 is a mixer, splitter, and booster amplifier in 19” rack format for flexible live and studio applications.
The LDMS828 has one stereo and six mono channels with individual LED level metres; all inputs and outputs are electronically balanced. Two mono channels are equipped with stereo TRS sockets, the other connectors are XLR sockets. The stereo channel has individual volume controls for input and output and a link button for looping through the signal; each mono channel has volume and panorama controls as well as a button that toggles between the splitter and mixer functions.
TheLDMS828 by LD Systems is impressive not only because of its practical features, but also because of its technical specifications. The broad frequency response of 5 - 40,000 Hz, a dynamic range of 85 dB, and the extremely low total harmonic distortion of 0.0008% guarantee maximum signal fidelity. The nominal working level of -10 dBV to +4 dBU makes the mixer/splitter suitable for connection to both professional and consumer equipment.
Mono input channels, line
6
Mono line input connectors
2 x 6.3 mm TS
Mono line input type
Electronically balanced
Stereo Line Input Channels
1
Stereo Line Input Connectors
2 x XLR
Stereo Line Input Type
Electronically balanced
Input impedance
(balanced) 50000 Ohm(s), (unbalanced) 25000 Ohm(s)
Max. input level
+ 21 dBu
Nominal working level
-10 dBV - +4 dBu
Mono output connectors
2 x 6.3 mm TS
Mono output type
Electronically balanced
Stereo output connectors
1 x XLR
Stereo output type
Electronically balanced
Output impedance
(balanced) 60 Ohm(s), (unbalanced) 30 Ohm(s)
Max. output level
+22 dBu
Frequency response
5 - 40000 Hz
Controls
Level Channel 1-6, Main Input Level, Main Link, Main Output Level, Power, Splitter/Mixer Channel 1-6
Indicators
In/Out Level Channel 1-6 (6 -segment), Input Level LED Indicator (6-segment), Output Level Indicator (6-segment), Power
Operating voltage
220 V AC - 240 V AC, 50-60 Hz
Mains connector
IEC power connector
Accessories (included)
Power cord
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INPUTS: 1 unbalanced stereo audio 1Vpp/50kΩ on a 3.5mm mini jack; 3 unbalanced stereo audio 1Vpp/50kΩ on RCA connectors.
OUTPUTS: Stereo headphone on a 6.5mm connector; loudspeakers on a terminal block connector; automatic switching when a headphone is plugged in.
OUTPUT POWER: 2x10W (4Ω).
OUTPUT MUSIC POWER: 2x40W (4Ω).
BANDWIDTH (-3dB): 20kHz.
S/N RATIO: 77dB @1kHz.
CROSSTALK: -73dB @1kHz, all hostile.
CONTROLS: Input selector switches: bass (70Hz), mid (1kHz), treble (15kHz): +/-13dB; volume, balance and loudness controls.
COUPLING: AC.
AUDIO THD + NOISE: 0.5%.
AUDIO 2nd HARMONIC: 0.3%.
POWER SOURCE: 12V DC, up to 2.5A.
DIMENSIONS: 19cm x 13.5cm x 2.5cm (7.5” x 5.3” x 0.98”) W, D, H.
WEIGHT: 0.6kg (1.32lbs) approx.
ACCESSORIES: Power supply.
OPTIONS: RK-T2B 19" rack adapter.
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INPUTS: 4 balanced stereo audio +4dBu/50kΩ on XLR (F) connectors.
OUTPUTS: 20 balanced stereo audio +4dBu/50Ω on XLR (M) connectors.
MAX. OUTPUT LEVEL: 23.8Vpp.
BANDWIDTH (-3dB): >100kHz.
S/N RATIO: 89.3dB.
CROSSTALK: -78dB.
CONTROLS: Level (x4): -0.7dB to +5.1dB, mode selector switches.
COUPLING: AC (input); DC (output).
AUDIO THD + NOISE: 0.081%.
AUDIO 2nd HARMONIC: 0.006%.
POWER SOURCE: 230V AC, (115V AC USA), 15VA.
DIMENSIONS: 19" x 7" x 2U W, D, H, rack mountable.
WEIGHT: 3.5kg (7.7lbs) approx.
ACCESSORIES: Power cord, rack "ears“.
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INPUTS: 1 unbalanced stereo audio, 1Vpp/50kΩ on RCA connectors; 1 mono microphone, 5mV/3.2kΩ (condenser) 4.8kΩ (dynamic) with a type selector, on a 6.5mm phone jack.
OUTPUTS: Unbalanced stereo audio 2W/4Ω per channel on both 3.5mm mini jack and 4-pole detachable terminal block speaker output.
MAX. OUTPUT LEVEL: 8Vpp at Hi-Z load (headphones).
BANDWIDTH (-3dB): 37kHz.
S/N RATIO: 74dB.
CONTROLS: Input selector switch, bass +/-10dB @100Hz, treble +/-12dB @10kHz, volume, balance.
COUPLING: AC.
AUDIO THD + NOISE: 0.04%.
AUDIO 2nd HARMONIC: 0.24%.
CROSSTALK: -60dB @1kHz, 20kHz.
POWER SOURCE: 12V DC, 60mA.
DIMENSIONS: 12cm x 7.5cm x 2.5 cm (4.7” x 2.95” x 0.98”) W, D, H.
WEIGHT: 0.3kg (0.66 lbs) approx.
ACCESSORIES: Power supply, mounting bracket.
OPTIONS: RK-3T 19" rack adapter.
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INPUT: 1 mono microphone, 5mVpp/10kΩ on a 6.5mm phone jack.
OUTPUTS: 4 mono line level, 1Vpp/150Ω on 6.5mm phone jacks.
MAX. OUTPUT LEVEL: 4.8Vpp.
AUDIO BANDWIDTH (-3dB): 37kHz.
GAIN CONTROL: 5dB to 54dB.
S/N RATIO: 78dB.
THD @1kHz: 0.1%.
POWER SOURCE: 12V DC, 20mA.
DIMENSIONS: 12cm x 7.5cm x 2.5cm (4.7” x 2.95” x 0.98”) W, D, H.
WEIGHT: 0.28kg (0.62lbs) approx.
ACCESSORIES: Power supply, mounting bracket.
OPTIONS: RK-3T 19" rack adapter.
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The Central Station is the ultimate studio-monitoring interface for the modern digital studio. The Central Station features three sets of stereo analog inputs to switch between input sources such as: DAW, mixer, CD/DAT/Tapeplayer, or keyboards/samplers. Two stereo analog inputs feature TRS balanced and the third stereo input features RCA inputs with trim control for level matching of input signals. In addition, the Central Station will accommodate two digital inputs via S/PDIF or TOSLINK providing D/A conversion up to 24Bit/192kHz. This allows you to monitor DAW and CD/DAT outputs through the same professional quality converter for the most accurate A/B comparison and highest quality monitoring environment. The digital to analog converter offers the highest possible audio quality with over 117dB dynamic range and ultra high quality analog circuitry. The Central Station features three sets of monitor outputs, each with their own set of passive trim controls. The monitoring section also provides MUTE, DIM and MONO switches. In addition, the Central Station includes a set of CUE outputs that can feed headphone amplifiers and a separate stereo MAIN line level output.
Technical Specifications
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Audio Inputs
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TRS1&2
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Type
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¼” TRS Passive-Balanced
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Input Impedance
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2K-5K Ohm (Speaker load and Trim level dependent)
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S/N Ratio
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Greater than 140dB
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THD+N
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Less than .0005% (1KHz @ 0dBu)
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Frequency Response
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Greater than 1MHz
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AUX
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Type
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RCA Active-Unbalanced
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Input Impedance
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8Kohm
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S/N Ratio
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Greater than 115dB (1KHz @ 0dBu, Unity gain)
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THD+N
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Less than .002% (1KHz @ 0dBu, Unity gain)
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Frequency Response
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10Hz-50KHz, -.5dB
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Gain Range
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-90dB to +20dB
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S/PDIF
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Types
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RCA 75Ohm-coax and Toslink optical
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Dynamic Range
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117dB
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THD+N
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0.0025% (1KHz @ -1dBfs)
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Maximum output
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+18dBu (Active-Balanced)
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Sample Rates
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44.1K, 48K, 88.2K, 96K, 176.4K, 192K
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Audio Outputs
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Speakers
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Type
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¼” TRS Passive-Balanced
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Type-Mono Activated
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¼” TRS Active-Impedance Balanced
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Trim Range
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-90dB to 0dB
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Main Level Range
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-90dB to 0dB
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Dim Attenuation
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-30dB
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Main
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Type
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¼” TRS Active-Balanced
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Output Impedance
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51Ohm
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THD+N
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Less than 0.0025%
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Frequency Response
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10Hz-50KHz, -.5dB
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Cue
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Type
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¼” TRS Active-Impedance Balanced
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Output Impedance
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51Ohm
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THD+N
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Less than .003% (1KHz @ 0dBu)
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Frequency Response
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10Hz-50KHz, -.5dB
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Gain Range
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-90dB to 0dB
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Dim Attenuation
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-30dB (Talkback activated)
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Headphones
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Type
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¼” TRS Active Stereo
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Maximum Output
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150mW/channel @ 60 Ohm load
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THD+N
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0.015% (150mW/channel @ 60 Ohm load)
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Frequency Response
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10Hz-50KHz, +1dB
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Physical
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Main Chassis
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Package Type
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1U - steel chassis
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Dimensions
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19(W) X 1.75(H) X 5.50(D) inches
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Weight
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5.0lbs
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External Power Supply
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Package Type
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Molded Plastic
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Dimensions
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2.5(W) X 2.3(H) X 4.0(D) inches
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Weight
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2.5lbs
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