Yamaha P-2200, P-2200/2201, P-2201

use, a cable with rubberized insulation and braided

shield

(such

Belden #8413 or #8412) will handle

easily and survive road abuse; for permanent wiring,

a vinyl insulated cable with a foil shield (such as

Belden #8451) is easier to strip for terminations, and

pulls through conduits

with

less

drag.

Fig. 47 - "Chaining" of Inputs

For unbalanced, signal level cables, use low capaci-

tance shielded cable with a good quality (high percentage

density) shield. Again, rubberized types work best for

portable use, vinyl types with foil shields are acceptable

for permanent installations (the foil shield may crack

and split under the constant flexing of portable usage).

Many single conductor shielded cables have an extremely

fragile center conductor. To avoid this problem, use a

higher quality dual conductor cable and ground one

center conductor.

For high level speaker cables and DC control cables,

use heavier gauge cable. The chart in Figure 48 shows

the effects of different sized wired gauge on power

losses in speaker cable. Except in extreme RF fields

(radio frequency interference), speaker and control

cables will not need shields; when they do, use heavy-

gauge shielded cable, or place the cables in steel or

aluminum conduit.

*Approximate. depends on wire type.

Fig. 48 - Chart showing the effects of different Sized

Wired Gauge on Power Losses in Speaker Cable.

Connectors

many

cases,

connectors

will

dictated by the

types of equipment in the system. When you can make

choices, the following guidelines may help.

Phone Connectors are an audio industry standard con-

nector used for signal and speaker lines. T.S. (tip/sleeve)

types, like those used as inputs on the P-2200, are used

for unbalanced signals; T.R.S. (tip/ring/sleeve) types are

used for balanced signals, or for stereo unbalanced

signals such as stereo headphones. Phone connectors are

generally easy to wire, and the metal types provide good

shielding. However, for high power applications, such as

the output of the P-2200, many phone plugs do not

have rated current capacities high enough to avoid some

power loss. Also, some phone plugs have a brittle

insulator between the tip and sleeve which can break if

the connector is dropped, resulting in a tip to sleeve

connection which is a direct speaker line short circuit.

For this reason, phone jacks have not been used for the

P-2200 output. If you have an amplifier with a phone

jack

output,

military

grade

phone connectors,

while

more expensive and somewhat harder to wire, are the

best choice for avoiding these problems.

Phono Connectors are not usually considered pro-

fessional, and are not included on the P-2200. If phono

connectors are part of a system, they should be the

higher quality types with a separate cover such as

Switchcraft#3502.

XLR Connectors are another audio industry standard.

They come in several configurations for different types

of cabling, and can be used for either balanced or un-

balanced connections. Three wire types, like those used

as inputs on the P-2200, are the most common. XLR

connectors are generally very durable, and are well

shielded. The three wire types have the added

advantage that pin#1 always connects before pin

#2 or #3 so that the ground or shield wire connects

before the signal carrying wires. This allows any static

charges

built

up on the shields

equalize before

the

signals meet, reducing pops in the system.

Banana jacks are common in the audio industry, and are

a standard connector for test equipment. They do not

provide any shield, and can be reversed in their socket.

However, banana jacks, like those used as output

connectors on the P-2200, have high current ratings,

and are good speaker connectors, especially inside an

equipment rack where occasional disconnections must

be made.

Other Connectors are occasionally used in audio work.

Standard, electrical twist-lock types have been used for

speaker connections, although there is always the

dangerous possibility of a mistaken connection to an

AC power line. Multi-pin "snake" connectors are

common for low level signals, but may be fragile and

need careful handling. For permanent installations, and

for permanent connections in portable equipment racks,

crimp type (as opposed to solder type) spade lugs and

terminal strips may actually provide the best type of

connection since a properly crimped connection is more

reliable, and lower impedance than a solder connection.

A "hard wire" or direct connection is also reliable and

low impedance if properly made.