Yamaha BBT110S Owner's Manual - Page 7
Using the Speaker System
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Using the Speaker System ■ 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 amplifier/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 together, determine the system's total impedance* and use a head amplifier/power amplifier that is within the system's requirements. * 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. ■ Connections • To protect the speaker system from damage, make sure that the power is switched OFF on the head amplifier/power amplifier or the volume is set to "0" before making any connections. • Use the supplied speaker cable or a commercially available speaker cable (standard monaural phone plug) when making 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). ● 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 ■ 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 adjust 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) 7