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.

Features

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.

Downloads

	Version	Language	Size	Uploaded
Control 300 Brochure updated: 13 มี.ค.			2.9 เมกะไบต์	13 มี.ค.
Control 328C_CT Spec Sheet updated: 13 มี.ค.			720 กิโลไบต์	13 มี.ค.
Control 328C-CT Backcan Assembly Instructions updated: 13 มี.ค.			539 กิโลไบต์	13 มี.ค.
Control 300 Transformer Bypass updated: 13 มี.ค.			59.2 กิโลไบต์	13 มี.ค.
Control 300 Transformer Insertion Loss updated: 13 มี.ค.			15.4 กิโลไบต์	13 มี.ค.
Control 300 User Guide updated: 13 มี.ค.			2.02 เมกะไบต์	13 มี.ค.
Specifications
Control 328C/CT Spec Sheet updated: 29 เม.ย.			720 กิโลไบต์	29 เม.ย.
Manuals
Transformer Bypass on Control 321CT, Control 322CT, or Control 328CT updated: 18 ต.ค.			59.2 กิโลไบต์	18 ต.ค.
Control 300 Series Transformer Insertion Loss Chart updated: 18 ต.ค.			15.4 กิโลไบต์	18 ต.ค.
Ceiling Speaker Accessory Guide updated: 18 ต.ค.			127 กิโลไบต์	18 ต.ค.
Brochures
Control 300 Brochure updated: 29 เม.ย.			2.9 เมกะไบต์	29 เม.ย.
CAD Drawings
Control 300 Ceiling Speakers updated: 18 ต.ค.			1.39 เมกะไบต์	18 ต.ค.
Compliances
JBL Control Series Passive Speakers DoC updated: 17 ธ.ค.			179 กิโลไบต์	17 ธ.ค.
Control 300 Series Declaration of Conformity updated: 18 ต.ค.			92.7 กิโลไบต์	18 ต.ค.
Software
Distributed System Design (DSD) v3.6.2 version 3.6.2, updated: 23 ก.ย.	3.6.2		805 กิโลไบต์	23 ก.ย.
User Guides
Control 300 User Guide updated: 29 เม.ย.			2.02 เมกะไบต์	29 เม.ย.
Install Guides
Control 328C/CT Assembly Guide updated: 29 เม.ย.			539 กิโลไบต์	29 เม.ย.
Speaker Tunings
Commercial, CBT, and AWC Tunings 220616 updated: 29 ส.ค.			557 กิโลไบต์	29 ส.ค.

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Parts & Service

Specifications

Frequency Range (-10dB)	45 Hz – 18 kHz
Power Rating	See transformer taps
Transformer Taps	68W, 34W, 17W, (& 8.5W @ 70V)
Frequency Response (±3 dB)	60Hz – 16 kHz
Coverage Angle	120° conical, constant directivity
Impedance	8 ohms
Directivity Factor (Q)	7.0 (Avg 1k - 16kHz)
Directivity Index (DI)	8.5dB (Avg 1k - 16kHz)
Sensitivity	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
Dimensions (H x W x D)	305 mm (12.0 in.) diameter round baffle x depth from back of baffle of 218 mm (8.6 in)
Input Connectors	Screw locking barrier strip for bare wire
Drivers	LF Driver: 200 mm (8 in) HF Driver: compression driver, 25 mm (1 inch) coil
Color	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)
Included Accessories	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