JBL Professional 3678

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The 3678 screen channel system can be used in either the passive mode or in a bi-amplified system.
THX^®-approved for THX system applications.

Low Frequency Transducer: One 380 mm (15 in) low frequency driver.
High Frequency Transducer: 25 mm (1 in) horn throat diameter, 44 mm (1.75 in) pure titanium diaphragm compression driver.
Flat power response 100° x 100° Bi-Radial® horn.
Operable in bi-amp or passive mode.
Includes adjustable bracket for horn aiming.
Shallow profile cabinet minimizes behind-screen space requirements.
THX® - approved for THX system installations (biamplified only).

	Version	Language	Size	Uploaded
Data Sheets
3678 Setup Instructions updated: ต.ค. 2019			25.4 กิโลไบต์	ต.ค. 2019
Specifications
3678 Spec Sheet updated: ต.ค. 2020			71.9 กิโลไบต์	ต.ค. 2020
Manuals
Cinema Sound System Manual updated: ต.ค. 2020			2.31 เมกะไบต์	ต.ค. 2020
CAD Drawings
Cinema Products updated: ต.ค. 2019			110 กิโลไบต์	ต.ค. 2019
Compliances
Cinema Sound - 3000 Series Declaration of Conformity updated: ต.ค. 2019			144 กิโลไบต์	ต.ค. 2019
Tech Notes
Tech Note: Polarity Conventions updated: ต.ค. 2019			55 กิโลไบต์	ต.ค. 2019
Information documents
Cinema CD updated: ต.ค. 2019			21.9 เมกะไบต์	ต.ค. 2019
JBL Professional Model Number Listing: updated: ต.ค. 2020			47.3 กิโลไบต์	ต.ค. 2020

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Frequency Range (-10dB)	30 Hz to 20 kHz (-10 dB)
Frequency Response (±3 dB)	45 Hz to 12 kHz (+/- 3 dB)
Power Capacity (Continuous Pink Noise)	300 W Passive HF: 50 W Bi-Amp LF:600 W Bi-Amp
Sensitivity	98 dB (1W, 1m)
Nominal Impedance	8 Ohms
Crossover Frequency	1 kHz
Nominal Coverage	90° Horizontal, 90° Vertical
Half-Space Reference Efficiency	3.3%
Maximum Acoustic Power Output	8 Acoustic W (Sine Wave Input)
System Polarity	Positive Voltage to RED produces forward cone motion
Input Connectors	Barrier Strip Screw Terminals
Dimensions (H x W x D)	1019 (w/horn) x 651 x 292 mm (40.125 (w/horn) x 25.625 x 11.5 in)
Net Weight (each)	41 kg (90 lb)
Power Handling (2Hr AES Rating)	300W