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PowerPlant 100 S

All units of a hifi-system generate mains noise which influences the

sound-quality. They should be isolated from the other units in the sys-

tem by means of PowerPlant. For this purpose, the PP 100 S has a

particularly high backward attenuation, which prevents the propagation

of these interferences back into the mains. Furthermore, the PP 100 S

filters out high-frequency noise from the mains and removes DC, which

can lead to hum from transformers.

Installation and connection

The PP 100 S can be positioned on the floor behind the hifi-system.

Please note that surfaces that are highly susceptible to vibrations, such

as shelves or floating wooden floors may cause a slight mechanical

hum. As a countermeasure, a decoupled installation is recommended

in these cases, e. g. by using a soft underlay. Experience has shown

that interconnect or loudspeaker cables laid directly near the PP 100 S

are not disturbed. However, a small distance of 10–20 cm can bring

sonic advantages. The transformers for MC cartridges should be placed

a little further away; we recommend about 50 cm. The PP 100 S is

connected to the mains with its captive lead. Please watch that the red

lightning on the plug should be connected to the "hot" or "live" cable of

the mains. The output socket also has a red dot to mark the pole that

carries "live" voltage.

Load capacity

It is essential to observe the maximum load capacity, especially for the

PP 100 S. This is indicated on the type plate. The PP 100 S can supply

practically any source device (CD player, D/A converter, phono stage,

etc.), but it is unsuitable for larger loads such as integrated amplifiers,

power amplifiers, subwoofers or large televisions. For this purpose,

there is the Power Plant 1500 U.

Overload protection

The PP 100 has thermal overload protection. At permanent overload of

approx. 1.5 times, the unit is automatically switched off. After cooling

down, the unit switches itself on again automatically. In this case, re-

duce the load to the permissible level to avoid damage and to achieve

the best sound quality.

Options for connecting the PowerPlant

The best sound quality is achieved when only one load is connected

to a PP 100 S. This way, the devices to be filtered cannot interfere with

each other. However, it is also permissible to distribute power behind

the PP 100 S, as long as the maximum permissible load is not exceed-

ed. In accordance with VDE (the German safety rules, please watch

the regulations in your country!), a 3-pole (with separate ground con-

PowerPlant 100 / PowerPlant 1500 U

nection) distributor and 3-pole cables must be used. The safety guide-

lines are complied with when using a PowerStar and Ampère cables. If

ground loops are a problem in your installation, the PP 100 S can be

converted to earth-free operation. This conversion may only be carried

out at the factory. This is possible according to the VDE guidelines as

the PP 100 S enables galvanic mains separation and maintains the

necessary insulation voltage. Please ask for advice in advance from

Audioplan or your dealer.

Note: In addition to the filter effect for high frequencies, DC components

are removed from the mains. The output voltage of the PP 100 S, inde-

pendent of the mains voltage, no longer contains any DC component.

PowerPlant 1500 U

For the placement of the PP 1500 U, the same guidelines as for the

PP 100 apply. In addition to the features of the PP 100 S, the PP 1500 U

has a power switch. If it is switched off, about 20 W of loss power can be

saved. Please note that due to its high power reserves, the PP 1500 U

has a considerable inrush current, which occasionally triggers fast acting

circuit breakers. For sound reasons, we have nevertheless dispensed with

an inrush current limiter. We recommend the installation of a melting fuse

instead. If this is not possible, a 16 A automatic circuit breaker with a

slow-blow characteristic (C 16 A) will also meet the requirements.

Outputs of the PowerPlant 1500 U

The PP 1500 U has two switchable outputs, which can only be used

alternatively. On the one hand, there is an unearthed output with gal-

vanic mains isolation that is activated via the lower switch position.

This output is ungrounded, which avoids hum loops. The "hot" or "live"

pole is marked. It should only be used if hum problems due to earth

loops occur with a direct mains connection. On the other hand, there is

an earthed output with phase compensation, which is used in all other

cases. The output has no fixed assignment of the mains "hot" pole and

is therefore not marked!

Adjusting the phase compensation

The phase compensation allows for the compensation of different po-

tentials on the earth lines. Compensating currents on the signal lines

are thus avoided. For this purpose, the ground-potential of the device

connected to the PP 1500 U must be brought to earth potential. First

disconnect all connection cables from the unit to be adjusted. If the unit

is earthed (3-pole cable), the unit must be connected ungrounded for

the measurement, e.g. with an appropriate adapter cable. Plug the unit