6. Installation
11
D SERIES Lake Operation Manual rev 3.0.4
6. Installation
D SERIES Lake Operation Manual rev
3
.0.
3
11
6.4.1. Low voltage country considerations
Although the D Series has a wide range of operating mains voltage, some considerations can be applicable for
low voltage regions. D Series performs well throughout the specified nominal voltage range but has slightly better
efficiency at higher voltages. For regions with nominal voltage below 140 V, one could consider connecting the
amplifier in a three phase delta or two phase split-phase configuration, especially applicable for the bigger models,
(D200, D120 and D80).
NOTE: Following connections applicable only for resulting voltage inside the amplifiers nominal voltage
range.
Connecting the amplifier in three phase delta configuration
In three–phase configuration where the phases are 120 degrees apart, one can connect three balanced loads in a
delta configuration. The connection is made between the phases instead of between the neutral and a phase.
Amp
120V
120V
120V
L1
Amp
L2
L3
Amp
N
N
Amp
Amp
Amp
3 phase Y 120V
3 phase delta 208V
208V
208V
208V
L1
L2
L3
Figure 6:4: Three phase delta configuration
Connecting the amplifier in a split phase configuration
In two phase split–phase configuration there are two phases separated by 180 degrees. Connecting between the
phases gives double the line voltage.
Figure 6.5: Two phase split–phase configuration
6.5. Grounding
D Series must be grounded (earthed) with the safety ground pin to the mains distribution system. NEVER
disconnect the earth (ground) pin on the mains cable (AC power cord). Use correctly-shielded balanced audio
input connections to minimize hum and interference.
Split phase 100V
100V
100V
200V
L1
Amp
L2
N
Amp
Split phase 200V
L1
L2
N
Amp
