Lab.gruppen LAB 1000 User Manual

Appendix A
Mains voltage selection
LAB 1000 is normally shipped for 230 volt AC
operation only. For export there is a 115/230 volt
AC option available. To check if the amplifier is
equipped with this option, please follow these
steps:
1. Make sure that the LAB 1000 is unplugged
from the mains voltage.
2. Remove the top cover.
3. Locate the terminal block for the mains cable.
Figure 13. 230 VAC wiring
4. To select the desired mains voltage, wire the
terminal block as shown in Figure 13 or 14.
5. For 230 volt operation; use a T8 A fuse (slow
blow), for 115 volt change to a T15 A fuse
(slow blow).
6. Replace the amplifier top cover.
7.
For 115 volt operation; stick a ”115 VAC”
label on top of the 230 VAC label on rear
panel.
Figure 14. 115 VAC wiring
Warning: This modification should only
be made of an experienced service
technician.
Maintenance
Under normal use the amplifier should give years
of trouble free service. The only user maintenance
required from the user is to vacuum the front grill
periodically.
In some extreme cases it may be necessary for
your supplier to clean the inside of the amplifier.
These conditions usually occur after prolonged use
in environments using "cracked- oil" smoke
machines.
If you are using your amplifier for heavy duty use
i.e. concert touring or industrial music it is
recommended that you have your amplifier
serviced every 3 years, purely as a preventative
measure
Troubleshooting
These are typical things to check if you think your
amplifier is faulty:
Fault: No output.
If the output bargraph is functioning there is
nothing wrong with the amplifier, and the likely
cause is an unsecured Speakon.
Check that the VHF protection is not activated. If
it is, remove possible high frequency oscillations
from the relevant input.
Fault: The amplifier goes into thermal protection
when driven at low level.
Check that your loudspeaker has not got a short
circuit in its windings, (this can occur when the
speaker coil gets warm).
Fault: The amplifier does not respond even after
checking above items.
In the unlikely event, that there is a non-user
rectifiable fault, return the amplifier to your
supplier or an approved service centre.
Lab Gruppen cannot be held responsible for
damage or injury, as a result of the top cover
being removed.
10

Lab.gruppen LAB 1000 Specifications

Power Output

max output power at 8 Ω stereo	350 W
max output power at 4 Ω stereo	550 W
max output power at 2 Ω stereo	600 W
max output power at 8 Ω bridged	1200 W
max output power at 4 Ω bridged	1300 W

Power Output (EIA)

max output power at 8 Ω stereo (EIA)	380 W
max output power at 4 Ω stereo (EIA)	600 W
max output power at 2 Ω stereo (EIA)	700 W
max output power at 8 Ω bridged (EIA)	1300 W
max output power at 4 Ω bridged (EIA)	1400 W

Calculated Peak Power

peak power at 8 Ω stereo	500 W
peak power at 4 Ω stereo	900 W
peak power at 2 Ω stereo	1300 W
peak power at 8 Ω bridged	1800 W
peak power at 4 Ω bridged	2600 W

IHF Peak Power

ihf peak power at 8 Ω stereo	450 W
ihf peak power at 4 Ω stereo	750 W
ihf peak power at 2 Ω stereo	900 W
ihf peak power at 8 Ω bridged	1500 W
ihf peak power at 4 Ω bridged	1800 W

Distortion

thd 20 Hz-20 kHz and 1 W-600 W at 4 Ω	0.08 %
thd at 1kHz and 600W at 4 Ω	0.03 %
dim 30 at 300 W at 4 Ω	0.02 %
ccif (13 and 14 kHz) at 200 W at 4 Ω	0.02 %
smpte (60 Hz and 7 kHz) at 300 W at 4 Ω	0.05 %

Power and Operating Conditions

power bandwidth	10 Hz-50 kHz
slew rate	40 V/µs
output impedance at 1 kHz	0.07 ohm
hum and noise below max power	<- 105 dBA
channel separation at 1 kHz	90 dB
channel separation at 10 kHz	75 dB

Phase and Delay

deviation from perfect delay 150 Hz-20 kHz	± 2°
total delay input to output at 4 ohms	4.1 µs
sensitivity for full output into 4 ohms	0.775 or 1.7 Vrms
gain switchable	36 dB or 29 dB
impedance	20 kohms, balanced

Power Requirements

operation voltage	120 V - 260 V AC
full output power	230 V AC
peak inrush current	83A

Dimensions and Weight

width	483 mm (19”)
height	88 mm (3.5”)
depth	355 mm (14”)
weight	18 kg (40 lbs)