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4 π space: +0 dB
(Free sound field)
2 π space: +6 dB
(Semi-free sound field)
π space: +12 dB
(1/4 free sound field)
π/2 space: +18 dB
(1/8 free sound field)
6. INSTALLATION
6.1. Installation Location and Acoustic Energy
Acoustic energy emitted from the speaker differs depending on installation locations.
The figures below show that the acoustic energy increases in other installation locations, referenced to the free sound field
(ceiling suspension).
6.2. Suspended Installation
Remove the 4 screws on both sides of the subwoofer system, screw 30 – 50 mm (1 3/16" – 1 31/32") M8 eyebolts into the
exposed holes, and use these to suspend the subwoofer using wire or chain.
Note
Eyebolts, nuts, and washers are not supplied and should be acquired separately.
Be sure to select wire, chain, and/or anchor shackles with a safety factor
appropriate to the weight of the speaker system. Incorrect selection of these
suspension components may cause the speaker system to fall, potentially
resulting in damage and/or personal injury.
WARNING
Use the optional HY-PF1B or HY-PF1W Speaker Rigging Frame to suspend the FB-120 subwoofer together in the same
location with TOA HX-5 series speakers.
For suspension, refer to the instruction manual attached to the HY-PF1B or HY-PF1W.
Remove the 4 preinstalled
screws on both sides.
M8 eyebolt
(30 – 50 mm or 1
3/16" – 1 31/32" long)
• Two speaker systems can be operated in parallel by connecting them in a
cascade configuration as shown at right.
Note
Be sure to connect the speaker system to the power amplifier's output
terminal of 4 Ω or less.
Connecting it to an output terminal of over 4 Ω may cause amplifier failure.
First speaker Second speaker