Arcam P38 Manuel - Page 12

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Connecting loudspeakers

Wiring strategies

There are three different wiring strategies that can be employed to connect your amplifi er to your

speakers. The choice will be limited by what your speakers can support.

Single wiring

Single wiring is the conventional wiring method of running a single cable per channel between the

amplifi er and the speaker. This is the easiest technique.

Bi-wiring

Bi-wiring is running two separate cables between the amplifi er and each speaker, with one cable

carrying the low-frequency information, the other the higher-frequency signals. The P35 and P1

are designed to allow easy bi-wiring, but speakers support it only if separate connection terminals

are provided for the two cables (the speaker will have two pairs of terminals on the back, one pair

labelled 'HF' or 'High Frequency', the other pair labelled 'LF' or 'Low Frequency').

Why is this useful?

Bi-wiring improves the sound of your system because the separation of high- and low-frequency

signal currents into separate speaker cables avoids distortions caused by the different currents

interacting with one-another within a single cable, as occurs in single-wired systems.

Bi-amping

Bi-amping is the separation of the amplifi cation of low- and high-frequency signals over two

amplifi ers. You will require two amplifi ers to do this.

Why is this useful?

The performance of your system is enhanced over bi-wiring by extending the signal separation

principle to use separate amplifi cation for the low and high frequency drivers in each speaker.

Single wiring

Both the P35 and the P1 are designed for bi-wiring, which

is why there are duplicate speaker terminals on the back.

Both amps are quite happy with single-wiring, however; we

recommend that you use the lower sets of speaker terminals

(labelled 'SP1' on the P35) in this case. Similarly, if your

speaker has more than one pair of connecting terminals, use

the terminals labelled 'LF' or 'Low Frequency' on the speaker.

For the P35, connect the positive terminal of the right

speaker connection on the amplifi er (coloured red and

labelled '+R') to the positive terminal of your right speaker.

Similarly, connect the negative terminal of the amplifi er

(coloured black and labelled with 'R–') to the negative

terminal of your speaker. Repeat the process for the left

speaker, using the amplifi er terminals labelled '+ L –'.

For the P1, connect the positive speaker terminal (coloured

red and labelled '+') to the positive terminal of the speaker to be driven. Similarly, connect the negative

terminal of the amplifi er (coloured black and labelled '–') to the negative terminal of the same speaker.

Repeat the process for your other P1 and speaker.

If your speakers support bi-wiring, then there is a strip of metal on the speakers connecting the low-

frequency terminals to those for the higher-frequencies; this must not be removed in a single-wired

system.

Bi-wiring

Bi-wiring is performed in the same way as single

wiring except that, for each speaker, a pair of cables

are used to connect the amplifi er to each speaker.

Follow the instructions given for single wiring; then

perform the same actions, this time connecting the

second set of speaker terminals (labelled "SP2" on

the P35) to the speaker terminals labelled 'HF' or

'High Frequency'. Please refer to the illustration.

Speakers that support bi-wiring have a strip of

metal on the speakers connecting the low-frequency

terminals to those for the higher-frequencies; this

must be removed in a bi-wired system.

C31/P35/P1

E-12

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A P35 connected to speakers using single wiring.

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A P35 connected to speakers using bi-wiring.

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