the A43 or A52, via a pair of high quality phono to phono interconnects plugged into Output 1.
Select CD with the Listen selector on the front panel. The Balance control should be set in the middle position and the Volume control adjusted to about 9 o'clock, to start with. Volume and balance can be adjusted to suit using the knobs on the front panel or, in the case of P43R, Volume and Mute can be adjusted also using the remote handset. Connect the power supply, described below and then press the Power switch on the front panel. There will be a 3 - 5 second delay before the signal is allowed through to the power-amplifier, to prevent unwanted noises being amplified. With a signal present on the input, adjust the Volume control and, while listening to some relaxing music, please read the rest of this instruction manual.
POWER REQUIREMENTS
The P43, in its basic form, is a passive pre-amp, so it doesn't need power to run its cir- cuitry. The P43 can be made to run with active plug-in modules, which require power from either the Creek OBH-1 or OBH-2 stand alone power supplies. The P43R requires only the simple OBH-1 power supply but if active modules are used it is rec- ommended to use the regulated OBH-2 power supply for improved sound quality. Check with your dealer for details. The P43R will work manually without the power supply connected, but both P43 and P43R need to have the power switch (6) pushed in to un-mute the audio signal.
INPUT CONNECTION
All the input sockets on the P43 are factory set for line level signals only and they all have the same relative sensitivity. However, Aux.1 input can be configured as a Phono input by plugging in a suitable Creek MM or MC Phono Module. To fit a Phono Module it is first necessary to remove the metal cove and then remove the Link PCB on the mother board which is fitted to the connector in front of the Aux input sock- et. Your dealer will be able to advise you about this.
As all the inputs have the same sensitivity it is possible to connect a source compo- nent to any of the inputs without worrying about the description of the input. Tape input 1 & 2 allows for two tape players to be connected and tape to tape copying in both directions is possible.
OUTPUTS
The P43 pre-amp is equipped with three pairs of output sockets, instead of the usual one. This is to allow for more than one power amplifier to be connected to the pre- amplifier at a time (Bi-amping or Tri-amping) and for multi-room applications, or for dif- ferent gain settings or to provide balanced output on 2 and 3 and un-balanced on 1.
The standard P43 is configured as passive and therefore has no active circuits plugged in. To increase the gain of one or all of these outputs it is necessary to pur- chase extra active Line Output Modules as required. Your dealer can advise. To prevent unwanted noises, the active Output module has a muting circuit that shorts the signal to ground when the pre-amp is switched on and off.
Caution: In passive mode, no muting takes place on switch-on, so keep the volume control to a minimum on switch - on.
If balanced output is required from the P43, a Bridging Module is available that can be fitted into the the P43's 'Feature connector', located on the volume control PCB. This will allow two A43 power amplifiers to be connected in bridge mono mode, provid- ing much higher output power. Alternatively, it will provide balanced feed to one stereo A52/A52SE or 2 x A52/A52SE configured in mono, with balanced feed. Balanced feed allows for longer signal runs without losses and can improve the sound quality.
N.B. Instructions for fitting extra modules are supplied with the individual modules.
Tape output is provided on sockets Tape Output 1 and 2 and has a 1 KΩ impedance, which is low enough to drive most machines.
FRONT PANEL CONTROLS
To select a source component you wish to listen to, rotate selector (1) to the desired input. To record from a source component, rotate selector (2) to the desired input. This two control facilities allow you to listen to a different input from the one you may want to record. If you want to record from one tape recorder to another it is necessary to select the source recorder on (2) and monitor the recording on (1).
Balance (3) and Volume (5) controls alter the amount of signal allowed through the pre-amplifier prior to being amplified by the Output module. Normally, the Balance
(3)should be set with the marker in the vertical position for equal sound level from each channel. If greater or lower sound level is required from one channel, turn the control either way until the desired balance is achieved. The Volume control functions as an attenuator for the signal, reducing the level from the maximum possible. It does not boost the available signal level. However, in active mode there will be a higher level signal available on the output than provided on the input.
The Phones socket (4) is inoperative until configured by the dealer with an active Line
/Headphone module. The plug-in module is required to provide the amplification for headphones as well as increasing the possible output signal level. The Phones out- put has an impedance of 30 Ω and the amplification factor is determined by the imped- ance of the phones used. Control the level required using the volume control. When the Phones socket is used, the active Output will be muted. The headphone output will provide high quality drive to low impedance phones but is not designed to reach extremely high sound pressure levels.
