JBL Professional 8138

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8" (200 mm) Full-Range In-Ceiling Loudspeaker for use with
Pre-Install Backcans

The 8138 is an 8" ceiling speaker designed for use with a pre-install inceiling backcan, resulting in highfidelity performance at a costeffective price point. The 8138 is ideal for a wide variety of commercial sound applications from restaurant and retail to professional offices and reception areas.

特長

Stylish, contemporary appearance enhances any decor.
Clear sound from an 8 inch dualcone full-range driver.
Very high sensitivity of 97 dB for maximum sound levels using minimum amplifier power.
6W transformer for use on 70V/100V distributed speaker lines
Installs to in-ceiling backboxes having 4 mounting points on an 11.25" (286 mm) diameter mounting circle.
For use with MTC-81BB8 backcan and MTC-81TB8 tile bridge

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Specifications

	サイズ	アップロード日
8138 Spec Sheet 更新: 2020年10月	363KB	2020年10月

Brochures

	バージョン	言語	サイズ	アップロード日
Control Contractor Brochure (2024) バージョン D, 更新: 2024年2月	D		14MB	2024年2月

Compliances

	サイズ	アップロード日
8138 Declaration of Conformity 更新: 2020年10月	88KB	2020年10月

Software

	バージョン	サイズ	アップロード日
Distributed System Design (DSD) バージョン 3.9, 更新: 2025年11月	3.9	612KB	2025年11月

FAQs

	サイズ	アップロード日
8138 Frequently Asked Questions 更新: 2020年10月	31.5KB	2020年10月

Images

	サイズ	アップロード日
8138 Hi Res Image 更新: 2020年10月	12.1MB	2020年10月

Speaker Tunings

	バージョン	サイズ	アップロード日
Commercial, CBT, and AWC Tunings 220616 バージョン A, 更新: 2023年5月	A	557KB	2023年5月

Accessories

	バージョン	サイズ	アップロード日
Ceiling Speaker Accessory Guide バージョン 2026-04, 更新: 2026年5月	2026-04	570KB	2026年5月

Quick Start Guides

	サイズ	アップロード日
Quick Start Guide - JBL 8100 Series 更新: 2025年6月	412KB	2025年6月

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パーツとサービス

仕様

Drivers	200 mm (8 in) Full-Range, Dual-cone
Frequency Range (-10dB)	95 Hz – 18 kHz
Coverage Angle	90° conical
Sensitivity	97 dB (2k - 8k Hz)
Driver Power Capacity	40W (160W peak), 2 hrs25W (100W peak), 100 hrs
Transformer Taps	6W, 3W, 1.5W, (0.75W at 70V only)
Input Connectors	Bare Wire
Magnet	10 ounces (283 g)
Safety Agency	Transformer is UL registered per UL1876
Installation	Full assembly consists of 8138 speaker plus MTC-81BB8 backbox andMTC-81TB8 tile bridge. Four screw holes at industry standard 286 mm (11.25 in) mounting circle.
Dimensions (Diameter x Depth)	327 mm (12.9") diameter baffle x 84 mm (3.3") depth from back of baffle. Overall depth, 99 mm (3.9")
Mounting points	4 points on 286 mm (11.25 in) diameter mounting circle
Ceiling Cutout Size	300 mm (11.75") with tile bridge and backbox.228 mm (9.0") diameter as stand alone.
Net Weight	1.4 kg (3.0 lb)
Included Accessories	Integral grille, 4 pcs M4 x 40 mm tapping screws
Optional Accessories	MTC-81BB8 backcan, MTC-81TB8 tile bridge
Power Rating	See transformer taps
Maximum SPL (1m)	105 dB (top 70V/100V tap)
Color	White
Backcan	formed steel (accessory)
Baffle/Rim	Plastic
Plenum Usage	Yes, with accessory backcan

アクセサリー

MTC-81BB8 | Pre-Install In-Ceiling Backcan

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Pre-Install In-Ceiling Backcan

The MTC-81BB8 is designed for use in applications requiring preinstalled backcans and is compatible with ceiling speakers having a 286 mm (11.25 in) mounting circle diameter, such as the JBL 8138 ceiling loudspeaker, and the JBL MTC-81TB8 tile bridge for suspended ceilings.

Fits 8138 speaker and MTC-81TB8 Tile Bridge
Extra-large 7.4 liter (0.26 cu ft) volume allows for extra bass
Industry standard 286 mm (11.25 in) mounting circle
Five conduit knockouts
Nesting during storage minimizes storage space requirements

ドキュメント

MTC-81BB8 Spec Sheet [176KB]
8138 Frequently Asked Questions [31.5KB]
MTC-81BB8 Hi Res Image [9.15MB]
Quick Start Guide - JBL 8100 Series [412KB]

MTC-81TB8 | Pre-Install In-Ceiling Tile Bridge for Pre-Install Backbox

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Pre-Install In-Ceiling Tile Bridge for Pre-Install Backbox

The MTC-81TB8 tile bridge is designed for use in applications requiring pre-installed backcans in suspended ceiling applications and is compatible with ceiling speakers having a 286 mm (11.25 in) mounting circle diameter, such as the JBL 8138 ceiling loudspeaker, and the JBL MTC-81BB8 pre-install backbox.

Fits 8138 speaker and MTC-81BB8 backbox
Load-bearing bridge eliminates ceiling tile sag by distributing weight to the ceiling’s support system
Rust-resistant 19-Gauge (1 mm thick) steel construction and e-coated finish ensures long service life.
Fits 610 mm (24 in) and 600 mm (23.6 in) tile grids