Installing/Servicing The Airlab - D&R Airlab User Manual

Installing/Servicing the Airlab

13 INSTALLING/SERVICING THE AIRLAB
Mains
Please check that the local mains supply corresponds with the voltage selected on the Airlab mains inlet.
The Airlab can be factory set for voltages between 100 - 120 Volts or 220 - 240 Volts. The Airlab is fused
with a 2 Amp slow blow fuse for 110 Volt or 1.0 Amp slow blow fuse for 220 Volt. DO NOT use any other
value, as this would be hazardous and the Airlab guarantee will be voided.
Clean Power Connection
Be sure to use a 'clean' power outlet, i.e. one that is fed directly from the mains, including earth. Only
connect the Airlab to this outlet and its associated equipment. This will act as the centralized mains and
earth for the studio.
It is advisable to install several multiple mains connectors close to the Airlab, with a master power switch to
shut down all power to the studio. Grounding MUST BE a star ground system.
Keep all wires as short as possible and never install audio next to power cables.
"Polluted" mains are caused by changing currents on the outlets, such as air-conditioners, coffee
machines, fridges, computers, dimmer packs etc. DO NOT connect any of these types of items to the
Airlab main power outlet.
Wiring
In cases where all the equipment is transformer balanced, it's usual to connect the shielding of the wiring to
the source side only.
In the Airlab, many of the sources will be unbalanced, so a different strategy needs to be adopted.
Equipment, such as CD players, doesn't have a mains ground connection. In this case the shielding can be
connected on both sides of the connection. There won't be a ground loop. Try to choose a CD player with
metal housing. If you experience problems with the transmitter interfering with the CD sound, connect the
CD housing to a ceramic capacitor of 0.01 uF/250 V to the mains earth.
Audio Connections to the Airlab
Prior to commencing wiring of the studio, it is advisable to obtain some labels, which will simplify trouble-
shooting. (Example; "CD-1, CH 2A")
The first step is to connect the Airlab to the mains, with all faders closed, no CRM active and the CRM
volume controls fully clockwise.
A. Connect the CRM amp to the CRM output, and check whether there's any 'hum' or
'noise' noticeable.
B. Now connect the phono players, and check again for `hum' and 'noise'.
NOTE: In most cases it is a matter of finding the best grounding for the phono ground by trial and
error. This might be directly to the audio ground or to the chassis of the Airlab.
C. Now connect Tape deck, Cart machines, CD/MD players etc.
Airlab from D&R Phone +31 294 418014, email: info@d-r.nl Page 44