JBL Professional Control 328CT

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8" Coaxial Ceiling Loudspeaker with HF Compression Driver

Control 328CT has been engineered from the ground up to deliver exceptional next-generation performance in a coaxial point source design ceiling loudspeaker.

特点

Consistent 120° broadband pattern control covers an extremely large area.
Shaped mounting baffle provides the pattern control of a 300 mm (12 in) horn from a 200 mm (8 in) driver.
Components
• 200 mm (8 in) woofer with Kevlarreinforced cone and 50 mm (2 in) voice-coil.
• 25 mm (1" exit) compression driver.
Extraordinary clarity for speech and vocals with extended frequency response for music.
250 Watt power handling with very high sensitivity provides high SPL capability.
Advanced high-slope crossover network for constant coverage and smooth, natural midrange.
Clean, contemporary grille and optional backbox available.

下载

	Version	Language	Size	Uploaded
Control 300 Brochure updated: 3月13日			2.9 MB	3月13日
Control 328C_CT Spec Sheet updated: 3月13日			719.5 KB	3月13日
Control 328C-CT Backcan Assembly Instructions updated: 3月13日			538.5 KB	3月13日
Control 300 Transformer Bypass updated: 3月13日			59.2 KB	3月13日
Control 300 Transformer Insertion Loss updated: 3月13日			15.4 KB	3月13日
Control 300 User Guide updated: 3月13日			2.0 MB	3月13日
Specifications
Control 328C/CT Spec Sheet updated: 4月29日			719.5 KB	4月29日
Manuals
Transformer Bypass on Control 321CT, Control 322CT, or Control 328CT updated: 10月18日			59.2 KB	10月18日
Control 300 Series Transformer Insertion Loss Chart updated: 10月18日			15.4 KB	10月18日
Ceiling Speaker Accessory Guide updated: 10月18日			126.9 KB	10月18日
Brochures
Control 300 Brochure updated: 4月29日			2.9 MB	4月29日
CAD Drawings
Control 300 Ceiling Speakers updated: 10月18日			1.4 MB	10月18日
Compliances
JBL Control Series Passive Speakers DoC updated: 12月17日			179.3 KB	12月17日
Control 300 Series Declaration of Conformity updated: 10月18日			92.7 KB	10月18日
Software
Distributed System Design (DSD) v3.6.2 version 3.6.2, updated: 9月23日	3.6.2		804.8 KB	9月23日
User Guides
Control 300 User Guide updated: 4月29日			2.0 MB	4月29日
Install Guides
Control 328C/CT Assembly Guide updated: 4月29日			538.5 KB	4月29日
Speaker Tunings
Commercial, CBT, and AWC Tunings 220616 updated: 8月29日			557.0 KB	8月29日

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Parts & Service

性能

频率范围 (-10dB)	45 Hz – 18 kHz
额定功率	See transformer taps
变压器抽头	68W, 34W, 17W, (& 8.5W @ 70V)
Frequency Response (±3 dB)	60Hz – 16 kHz
覆盖角度	120° conical, constant directivity
阻抗	8 ohms
Directivity Factor (Q)	7.0 (Avg 1k - 16kHz)
Directivity Index (DI)	8.5dB (Avg 1k - 16kHz)
灵敏度	93 dB (1 kHz - 16 kHz)
Maximum SPL (1m)	118 dB (top 70V/100V tap)
Crossover Network	1.9 kHz, 3rd order (18 dB/oct) high-pass plus conjugate
尺寸（高 x 宽 x 厚）	305 mm (12.0 in.) diameter round baffle x depth from back of baffle of 218 mm (8.6 in)
输入接口	Screw locking barrier strip for bare wire
Drivers	LF Driver: 200 mm (8 in) HF Driver: compression driver, 25 mm (1 inch) coil
颜色	White
Safety Agency	Suitable for use in air handling spaces per UL1480, UL2043, NFPA90 & NFPA 70 when installed with UL listed backcan such as JBL MTC-300BB8. S7232/UL Listed, Signaling Speaker. Transformer UL registered per UL1876. In accordance with IEC60849/EN60849.
Backcan	formed steel (wood-lined; accessory)
Baffle/Rim	Metal, round, driver pre-mounted to baffle, ported.
Ceiling Cutout Size	310 mm (12.2 in) diameter (for MTC-300BB8 backcan)
随附配件	Ported baffle pre-attached, plus transformer on 328CT.
Optional Accessories	MTC-RG6/8 Grille, round contoured, white. MTC-SG6/8 Grille, square, contoured, white. MTC-300BB8 Backbox, 25 liters (1 cubic feet)
Plenum Usage	Yes, with accessory backcan