Features of the Lab Gruppen 500W 4-Channel Amplifier
- 500 Watt, 4-channel amplifier with up to 125 Watts output per channel and NomadLink network for monitoring and control
- Selectable gain plus scalable Voltage Peak Limiter (VPL) and bridge-mode operation allow custom configuration for any application
- 4 x 125 Watts into 4 -16 Ohms low impedance or 70V constant voltage
- Proven and reliable Class-D output stage delivers sonic purity and efficiency
- Power Factor Correction (PFC) and switch mode power supply reduces running costs and minimizes environmental impact
- Intuitive Device Control software monitors and controls key functions via the NomadLink network
- Comprehensive protection scheme including current, voltage, DC, temperature, short circuit and open load warnings
- Fixed 35 Hz high pass filter, switchable per channel for sub sonic speaker protection
- 4 x balanced analog audio inputs on 3-pin Phoenix* connectors
- 4 x barrier strip 2-pole screw terminal output connectors
- Removable dust filter grille for increased air circulation
- Compact and durable 2U rackmount chassis saves space in install applications
- GPIO connectors with power control and indication for 3rd party system integration
- Universal power supply served through an IEC mains connector
- 10-Year Warranty Program*
- Designed and engineered in Sweden
Specifications:
General
| Number of amplifier channels |
4 |
| Peak total output all channels driven |
500 W |
| Peak output voltage per channel |
100 V |
| Max output current per channel |
5.6 Arms |
Max output power (all channels driven)
| 16 ohms |
125 W |
| 8 ohms |
125 W |
| 4 ohms |
125 W |
| 2 ohms |
60 W |
| Hi-Z per ch. (all ch.’s driven): 70 Vrms / 100 V peak |
125 W |
Max output power bridged
| 16 ohms |
250 W |
| 8 ohms |
250 W |
| 4 ohms |
125 W |
| 2 ohms |
Not recommended 1 |
| Bridged per ch.: 140 Vrms / 200 V peak |
250 W |
Performance
| THD 20 Hz – 20 kHz at 1 W |
<0.1% |
| THD at 1 kHz and 1 dB below clipping |
<0.05% |
| Signal to Noise Ratio |
>112 dBA |
| Channel separation (Crosstalk) at 1 kHz |
>70 dB |
| Frequency response (1 W into 8 ohms) + 0 / -3 dB |
6.8 Hz – 34 kHz |
| Input impedance |
20k Ohm |
| Common Mode Rejection (CMR) |
>50 dB, 20 Hz – 20 kHz |
| Output impedance @ 100 Hz |
48 mOhm |
Gain, Sensitivity and Limiters
| VPL, selectable per ch 2 |
100, 63, 45, 32 V |
| VPL, when bridged 2 3 |
200, 126, 90, 64 V |
| Voltage Peak Limiter mode (per ch.) |
Hard / Soft |
| Amplifier gain selectable (all channels) – rear-panel switches 3 |
29, 32, 35, 38 dB |
| Default gain |
32 dB |
| Level adjustment (per channel) |
Front-panel potentiometer, 21 position detented from -inf to |
Connectors and Buttons
| Input connectors (per ch.) |
3-pin Phoenix, electronically balanced |
| Output connectors (per ch.) |
Barrier strip 2-pole screw terminals |
| Output bridge mode |
A+B, C+D, E+F, G+H, inputs A, C, E, G are signal source |
| High pass filter |
Fixed at 35 Hz, switchable per channel |
| NomadLink network |
On board, 2 x RJ45 connectors IN and OUT |
| Intelligent fans (on/off) |
Yes, depending on presence of output signal |
| Power |
Individual switches on front panel |
| Cooling |
Two fans, front-rear airflow, temperature controlled speed |
| General Purpose Outputs (GPO) |
Contact Closure types, 2-pole Phoenix |
| General Purpose Inputs (GPI) |
Contact Closure types, 2-pole Phoenix |
Front-panel user interface
| Common |
NomadLink Network; Power Average Limiter (PAL)4; Power on |
| Per channel |
Signal present / High-impedance; Voltage Peak Limiter (VPL); Current Peak Limiter (CPL): Very High Frequency (VHF); High temperature; Fault; Mute |
Power
| Operating voltage, 230 V / 115 V nominal |
Universal power supply 65-265 V |
| Minimum power-up voltage, 230 V / 115 V |
80 V |
| Power Average Limiter (PAL) 4 |
Yes |
| Power Factor Correction (PFC) |
Yes |
| Soft-start / Inrush Current Draw |
Yes / max. 5 A |
| Mains connector |
IEC inlet |
Dimensions
| Dimensions |
W: 483 mm (19”), H: 88 mm (2 U), D: 343 mm (13.5”) |
Weight
| Weight |
8.5 kg (18.75 lbs) |
Finish
| Finish |
Black painted steel chassis with gray painted steel front |
Approvals
| Approvals |
CE, ANSI/UL 60065 (ETL), CSA C22.2 NO. 60065, FCC |
Chris Black –
Excellent amplifier