TOA Electronics A-724 - Manual (Page 8)

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8. RACK MOUNTING
To mount the unit in a standard 19" equipment rack, use the optional MB-25B Rack Mounting Bracket.
Attach the MB-25B to the unit using the supplied 4 screws. When using other screws, each screw must be
shorter than 16 mm.
MB-25B
M4 x 16 Machine screw included in MB-25B
9. CONTROL SETTINGS
Output levels are adjustable with individual volume controls.
For music play or announcements, adjust the corresponding
volume control so that the red indicator doesn't light. Note
that the sound quality is downgraded when the red indicator
remains lit.
To prevent the accidental change of the settings of input
volume and tone (Bass and Treble) controls, remove their
knobs after setting them to the desired position and attach
the supplied or optional YA-920 Volume Control Covers
instead.
INP
UT 1
BA SS
IMP
UT 2
YA-920
Control knob
10. DIMENSIONAL DIAGRAM
(Applicable to all models)
88.4
107.7
420
326.5 18 7
Unit: mm
This figure represents the A-724.