D 120:4L - Receiver Lab Gruppen - Free user manual and instructions
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| Product Type | Professional 4-channel Power Amplifier / Receiver |
| Number of Channels | 4 |
| Power Output (per channel) | 120 W RMS into 8 Ω, 200 W RMS into 4 Ω |
| Total Power Output | 480 W RMS (all channels driven, 8 Ω) |
| Frequency Response | 20 Hz – 20 kHz ±0.5 dB |
| Total Harmonic Distortion (THD) | <0.05% at 1 kHz, rated power |
| Input Impedance | 20 kΩ (balanced), 10 kΩ (unbalanced) |
| Input Connectors | 4x XLR balanced, 4x 1/4" TRS balanced/unbalanced |
| Output Connectors | 4x Speakon NL4, 4x binding posts (banana/compatible) |
| Cooling | Variable speed fans, front-to-rear airflow |
| Protection Features | Short circuit, thermal, overcurrent, DC offset, and RF protection |
| Amplifier Technology | Class D with regulated switch-mode power supply |
| Operating Voltage | 100-240 V AC, 50/60 Hz (auto-sensing) |
| Power Consumption (idle) | < 50 W |
| Power Consumption (full output) | ~ 600 W |
| Dimensions (W x H x D) | 19" x 3.5" x 16" (rackmount, 2U height) |
| Weight | 12.5 kg (27.6 lbs) |
| Rackmount Ears | Included, supports 19" rack installation |
| Front Panel | Power switch, signal/limit LEDs per channel, gain controls (if applicable), or DSP interface |
| Maintenance & Cleaning | Use dry cloth; do not use solvents; ensure vents are unobstructed; periodic filter cleaning recommended |
| Security & Compliance | CE, FCC, RoHS compliant; safety grounded |
| Spare Parts & Repairability | Contact authorized service centers; replaceable fans and power supply modules |
Frequently Asked Questions - D 120:4L Lab Gruppen
What is the power output of the Lab Gruppen D 120:4L per channel?
The amplifier delivers 120 W RMS per channel into 8 Ω and 200 W RMS into 4 Ω, all four channels driven.
How do I connect speakers to the D 120:4L?
Use the Speakon NL4 connectors or binding posts on the rear panel. Ensure proper polarity and impedance matching.
Can I bridge channels on this amplifier?
The D 120:4L does not support bridging. It is designed for stereo or multi-channel operation only.
What is the recommended rack mounting procedure?
Install the amplifier in a 19-inch rack using the included rack ears. Leave 1U space above and below for ventilation.
How do I clean and maintain the amplifier?
Use a dry cloth to clean the front panel and chassis. Regularly check and clean the air filters to prevent overheating.
What protection features does the D 120:4L have?
It includes short circuit, thermal, overcurrent, DC offset, and RF protection to safeguard the amplifier and connected speakers.
What input connectors are available?
There are XLR balanced and 1/4" TRS inputs for each channel. Use balanced cables for long runs to reduce noise.
Does the amplifier have a standby mode?
Yes, the amplifier automatically enters low-power standby after a period of inactivity (signal sensing). It can be configured via the front panel or software.
Can I use the D 120:4L in a home theater setup?
Yes, it is excellent for high-end home theater or professional sound applications, providing clean power to multiple speakers.
What is the warranty period for this product?
Lab Gruppen offers a standard 3-year warranty on the D 120:4L. Registration may extend coverage. Contact your dealer for details.
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USER MANUAL D 120:4L Lab Gruppen
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Product information
Brand : Lab Gruppen
Model : D 120:4L
Category : Receiver