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Specifications FRB5R FRB6R FRB8R
Speaker Compatibility DSi255, 455, DSi265, 465, DSi285, 485, 495
455T2, VRi555 465T2, VRi565 VRi585, 585t2, 595W
Hole Cutout 6
3
/4” 8
7
/8” 1 0
7
/8”
Can Depth 5
3
/8” 5
3
/8” 7
1
/4”
Plate Dimension (W x L) 23
3
/4” x 13” 23
3
/4” x 13” 23
3
/4” x 13”
Enclosure Volume 0.46 ft
3
0.46 ft
3
0.62 ft
3
Description
The three FRB models covered in the manual were designed to accommodate a variety of Boston Acoustics round in-ceiling
loudspeakers. They meet the stringent requirements of electrical codes throughout the country for fire and plenum rated
enclosures. Such enclosures are often required by building codes in commercial
applications and in town homes or condominiums.
Each FRB model is made from heavy gauge steel that is both heat and fire resistant. A 2” layer of insulation lines the inside
of the enclosure and provides up to 10dB of acoustical isolation between adjoining rooms. Each unit also includes internal
mounting posts for 70/100 volt transformers for use in commercial applications or home audio systems where many speakers
are used or where speaker wires must be run over long distances.
Additional Key Features
• TheFRBmodelsmeetthefollowingagencyrequirements:
UL 2043
UL 263
ATSM E119
NFPA251
CAN/ULC S101/M89
UBC 7-1
• Standard3/8”knockoutsforthetwosuppliedULMconnectors
• Colorcodedraisedangearoundthespeakeropeningtoaidlocationafterdrywallinstallation–
green for 5” speakers, blue for 6” speakers and gray for 8” speakers
• TheFRB5RandFRB6Rcanbemountedin12”,16”or24”studbays.TheFRB8Rcanbemountedin16”or24”studbays.
• Adjustablesupportbarsaresuppliedthatalloweasyinstallationindroptileceilings
• Anintegratedsafetytabismountedonthebackofthecabinetforaninstaller-suppliedsafetycable
This product has been tested and found to comply with UL 263
“One-Hour Fire Resistant Rating” and UL 2043
“For Use in Air handling Spaces”