Yamaha Portable Speaker SM10IV User Manual

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CONNECTION EXAMPLE 2
This example shows audio connections for a system using SW118IV or SW118IVS Subwoofers and a PN90 Crossover Network.
IV
IV
IV
IV
• Do not connect the PN90 between the power amplifiers and the SW118IV, SW118IVS subwoofers, as doing so will damage
the equipment.
• Although the PN90 has a standard load impedance of 15 kΩ, it can be used with loads between 7.5 and 30 kΩ, allowing use
with most power amplifiers.
• Since the LOW signal polarity is inverted at the crossover point between the LOW and HIGH signals, be sure to reverse the
polarity when connecting the SW118IV, SW118IVS input jacks to the power amplifier output jacks.
This polarity correction must not be made by reversing the polarity of the connections between the PN90 and the power
amplifiers, as doing so will damage the equipment. Please reverse the polarity between the power amplifiers and the
SW118IVs, SW118IVSs.
• The PN90 uses unbalanced connectors. Use shielded audio cable with high-quality phone plugs to connect the PN90.
The balance between the LOW and HIGH signal levels may be adjusted using the power amplifier volume controls. A good
starting point is generally achieved for typical sound sources by raising the LOW signal level about 8 dB higher than that of the
HIGH signal.

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