Arcam P1000 - Manual (Page 8)

P1000
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P1000
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Bi-amping
Bi-amping requires the use of a second amplifi er: one amplifi er is used to drive
the treble speakers, the other is used for the lower (bass) frequencies.
For the cables, bi-amping is much like bi-wiring. Connect the speaker terminals
from one module (channel) to one pair of terminals on your speaker. Connect
another module, or one channel of a separate power amp., to the other pair
of terminals on the speaker, so that two amplifi er channels are connected
to that speaker; one for low frequencies and one for high frequencies. The
treble (higher) terminals of your speaker should be connected to the speaker
terminals of the amplifi er module (channel) being used for the high frequencies,
while the bass (lower) terminals of your speaker should be connected to the
speaker terminals of the amplifi er or module (channel) being used for the lower
frequencies. The strip of metal on the speakers connecting the lower terminals
to the upper terminals must be removed. Failure to do so will result in damage
to both amplifi ers.
Notes on making speaker connections
< Do not make any connections to your amplifi er while it is switched on or connected to the mains
supply.
< Always ensure that the volume control on your pre-amplifi er is set to minimum before starting to
make connections.
< Before switching your P1000 on for the fi rst time after connecting to speakers, please check all
connections thoroughly. Ensure that bare wires or cables are not touching the amplifi er in the wrong
places (which could cause short circuits), and that you have connected positive (+) to positive and
negative (-) to negative.
< After making connections, turn the volume down to minimum on your pre-amplifi er before
switching the P1000 on. Switch the amplifi er(s) on, select a source signal, then gradually increase
the volume to the required listening level.
< If you are unsure as to how your system should be connected, or need advice on bi-wiring or bi-
amping, please contact your Arcam dealer. Your dealer will be happy to help you.
Setting the amplifi er gain
You may have noticed a small switch next to the speaker terminals for each channel on the rear of
the product. This switch allows the gain of the amplifi er to be set: move the sliders to the A, B, or C
position, depending on the gain value that you require.
< A: This position means that the P1000 has a gain of 31.5dB, which is the usual gain for Arcam
amplifi ers. Use this setting if the P1000 is to be used either on its own, or in conjunction with other
amplifi ers from Arcam.
< B: This gives the P1000 a gain of 29dB, which is the gain used by THX™-compatible amplifi ers. Use
this setting the P1000 is to be used with other amplifi ers that have a THX™ gain value, such as the
Arcam P7. Note that the P1000 is not a THX™-rated product.
< C: This gives the P1000 a gain of 26dB. Use this setting if the P1000 is to be used with other
amplifi ers that have this gain.
Although the gain for each channel can be set independently, it is very unusual that different channels
would be set to have different gains. We recommend strongly that you set all amplifi er channels
to the same gain setting.
Connecting to a power supply
Mains lead
The P1000 is normally supplied with a moulded mains-plug already fi tted to the lead. If for any reason
the plug needs to be removed, it must be disposed of immediately and securely, as it is a potential
shock hazard when inserted into the mains socket.
Check that the plug supplied with the unit fi ts your supply and that your mains supply voltage agrees
with the voltage setting (115V or 230V) indicated on the rear panel of the unit.
Should you require a new mains lead, or the voltage accepted by the unit does not match your supply,
please contact your Arcam dealer.
Plugging in
Push the IEC-plug of the power cable supplied with the unit into the POWER INLET socket in the back of
the unit. Make sure it is pushed in fi rmly.
Put the plug on the other end of the cable into your power supply socket and switch the socket on
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P1000 bi-amping (two amplifi er modules
for a single channel).