6
INSTALLATION
Note to Dealer
: Please read the following instructions thoroughly before attempting Installation:
Installation includes four main areas:
1. Physical Positioning (of the Aktiv Crossover, preamp and power amplifier)
2. Electrical Supplies
3. Signal interconnections
4. Adjustment
1.
Physical Positioning
The dominant factor in positioning the crossover and power amplifiers is the proximity of the power
amplifiers to a turntable and disc preamplifier. Even though low field toroidal transformers are
used in the power amplifiers the hum field from three substantial power amplifiers can cause
problems. In general the power amplifiers will have to be positioned further away from the turntable
and preamplifier than in a passive system. At least 1 metre is necessary between pre and power
amplifiers. The crossover is not as susceptible to interference from transformer hum fields and
can be positioned beside, but not on top, of the power amplifiers. Because there are no controls
(other than power switches) on the crossover and power amplifiers it may be convenient in some
installations to position them remote from the sources and preamplifier. The Linn LK1 preamplifier
is capable of driving up to 10 metres of Linn interconnect cable. The reduction in speaker cable
length will make for a tidier installation.
The heat generated by the crossover and power amplifiers is the next important factor. Three Linn
LK2/75 power amplifiers working into Isobariks can develop over 800 Watts of output power and in
doing so will generate at least the same heat again. Even though music does not cause this
amount of continuous power it is essential to allow adequate ventilation for the power amplifiers.
2.
Electrical Supplies
The position of the electrical supplies obviously depends on the physical layout of the system.
Electrical safety is essential. If enough power outlets are not available DO NOT wire multiple
cables into one plug. Either fit outlets to the wall where necessary or make up a high quality
extension with enough outlets.
It is recommended, if using mains extension units, that the power amplifiers-are all plugged into
the same one (if enough sockets are available) and that the preamp, crossover and sources, are
plugged into a separate one.
If all the power amplifiers are run off an extension from one mains outlet it is good practice to
switch the power amplifiers on one at a time from their front panels rather than all at once at the
power outlet.
DEALER INFORMATION
