Meyer STELLA-188, Руководство по эксплуатации

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CHAPTER 2: CONNECTING STELLA LOUDSPEAKERS
14
Cable Lengths and Cable Gauges for Stella
Loudspeakers
When connecting a single Stella-4 or Stella-4C to a
Stella-188 Channel Output, you can use cable lengths up to
300 feet with only 1 dB of peak SPL loss with 18 AWG wire.
When connecting two Stella-4s or Stella-4Cs (or one
Stella-8C), equivalent lengths are possible with heavier wire
gauges (see Table 3 and Table 4).
The maximum cable length for a single Stella-4 or Stella-4C
can be calculated with the following formula:
maximum length = 4 ohms / 2 * cable resistance
For example, the maximum length for 18 AWG cable with a
resistance of 0.00636 ohms/ft is 314.4 feet (4 / 2 * 0.00636).
If you are using two Stella-4s or two Stella-4Cs (or one
Stella-8C), the distance is reduced by half to 157.2 feet,
since the maximum cable resistance for two Stella-4s/
Stella-4Cs (or one Stella-8C) is 2 ohms.
NOTE: For long cable runs, you can use large
cable gauges for most of the run and then ter-
minate with the appropriate gauge (see Table 3 and
Table 4) at the connector.
CONNECTING STELLA LOUDSPEAKERS TO
THE STELLA-188
To connect Stella loudspeakers to the Stella-188:
1. Power off the Stella-188.
2. Attach a 25-pin D-sub audio cable or snake to the
Stella-188 Audio Input connector. This cable should use
the Tascam DA-88 wiring scheme (see Table 2 on
page 12).
3. Connect audio sources (from a mixer or processor) to the
other end of the audio cable or snake.
4. Connect Stella loudspeakers to the Stella-188 Channel
Outputs. Use composite cables (such as Belden 1502R)
wired for both DC power and balanced audio outfitted
with five-pin Phoenix connectors.
■ Connect up to 16 Stella-4s or Stella-4Cs to the
Stella-188.
■ Connect up to eight Stella-8Cs to the Stella-188.
NOTE: For maximum cable lengths for the
Stella loudspeakers, refer to Table 3 on
page 14 and Table 4 on page 14.
5. Enable output from the audio sources (from a mixer or
processor) connected to the Stella-188.
6. Power on the Stella-188 and monitor the LEDs on its
front panel to verify connections.
Table 3: Stella Loudspeaker Cable Lengths (AWG)
Cable
Gauge Cable
Resistance
(

/ft)
Approximate Maximum Cable Length
1 Stella-4 /
Stella-4C
per Chan.
2 Stella-4s /
Stella-4Cs
per Chan.
1 Stella-8C
per
Chan.
12 AWG 0.0016 1200 ft 600 ft 600 ft
14 AWG 0.00253 750 ft 375 ft 375 ft
16 AWG 0.00402 475 ft 237 ft 237 ft
18 AWG 0.00636 300 ft 150 ft 150 ft
20 AWG 0.01008 175 ft 87 ft 87 ft
Table 4: Stella Loudspeaker Cable Lengths (European)
Cable
Gauge Cable
Resistance
(

/m)
Approximate Maximum Length
1 Stella-4 /
Stella-4C
per Chan.
2 Stella-4s
/ Stella-4Cs
per Chan.
1 Stella-8C
per
Chan.
2.50 mm
2
0.0052 365 m 157 m 157 m
1.50 mm
2
0.01076 175 m 87 m 87 m
1.00 mm
2
0.02087 90 m 45 m 45 m
0.75 mm
2
0.03307 55 m 27 m 27 m