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Appendix B: Safety Requirements

B.1 Safety agency listings

B.1.1 UL

The Bose

FreeSpace

system controller (Model 8/32) is UL listed:

• Commercial audio equipment - UL 813

• Fire protective signaling - UL 1711 Control number 42S9, File number E63079

B.1.2 Other agencies

The controller is also listed with the following safety agencies:

• TÜV Rheinland

• CSA

• Dentori

B.2 Fire protective signaling

B.2.1 Signal processing equipment

Bose offers 70V fire safety models of both FreeSpace Model 8 and Model 32 loudspeak-

ers listed under UL 1480, category UUMW, as fire protective signaling devices. The Bose

FreeSpace system controller (Model 8/32) is the only equalizer listed for use with these

loudspeakers in fire protective signaling and warning systems. These loudspeakers will

not perform as specified for this application if used with another controller.

B.2.2 Gain adjustment

In order to achieve the UL listed SPL output of the FreeSpace Model 8 and Model 32

loudspeakers when used as a fire protective signaling and warning system, the warning

signal must be bandwidth limited to approximately the range of 400Hz – 4kHz. This signal

should be tested to confirm that a full 70 Volt signal is achieved at the amplifier output.

This signal must be directed through the system controller, with the input signal to the

controller properly adjusted to achieve the amplifier output specified.

AM177675-2_04_V.pdf • May 7, 2002

Warning

Do not use this gain adjustment

for full bandwidth audio material

or speech. Amplifier and/or

loudspeaker distortion may

result.