Yamaha BBT110S - Manual (Page 7)

7
Using the Speaker System
■ Connections
• To protect the speaker system from damage, make sure that
the power is switched OFF on the head amplifier/power am-
plifier or the volume is set to “0” before making any connec-
tions.
• Use the supplied speaker cable or a commercially available
speaker cable (standard monaural phone plug) when mak-
ing connections. The use of a normal shielded guitar cable,
etc., may result in overheating or damage to the cable, as the
level of the signal is high.
Using the supplied speaker cable, connect the INPUT jack on the
enclosure’s rear panel to the Speaker Output jack on the head amplifier/
power amplifier (SPEAKER 1, 2 jack on the Yamaha BBT500H).
■ Amplifier Requirements
The speaker system has a rated power handling capability of 250W and
an impedance of 4Ω.
Check the specifications (power output/impedance) of the head ampli-
fier/power amplifier you are going to connect to the speaker system and
use it under the conditions that meet the requirements of the speaker
system.
Also, if you are planning to connect two or more speaker systems to-
gether, determine the system’s total impedance* and use a head ampli-
fier/power amplifier that is within the system’s requirements.
■ Adjusting the Tweeter Level
The tweeter mainly produces high frequencies above 4kHz.
Use the TWEETER LEVEL control knob on the unit’s rear panel to ad-
just the output level of the tweeter.
[Speaker System Rear Panel]
Tweeter Level Adjustment
Speaker Output Jack on the Head
Amplifier/Power Amplifier.
Speaker Cable (supplied)
* Total Impedance
Whenever two or more speaker cabinets are used in a system, the
total impedance of the speaker system will vary according to the
manner in which the speakers are connected.
● Connecting in a Series
Total impedance = 1st Speaker + 2nd Speaker + 3rd Speaker …
Connecting three 4Ω speaker cabinets in a series as shown below,
results in a total impedance of 12Ω.
● Connected in Parallel
Total impedance =
Connecting three 4Ω speaker cabinets in a parallel configuration
as shown below, results in a total impedance of about 1.3Ω.
4 4 4