JBL 3678
Price unknown (1 unit, around 1999)
Commentary
A speaker system for theaters designed for small-scale spaces with up to 250 seats.
A 38 cm cone type woofer is installed in the low range.
This unit uses VGC (Bent Gap Cooling) and SFG (Symmetrical Field Geometry) technologies to achieve both high power and low distortion.
A unique biradial horn is used for the high-frequency band to achieve the same on-axis and off-axis characteristics and precise beam width control.
It has a built-in crossover network, but it can be bi-amped by changing the jumper setting.
THX certified (when bi-amp-driven)
Model Rating
| Method | 2-Way, 2-Speaker, Bass Reflex System, Floor Type |
| Units Used | For low band : 38 cm cone type For High Range : Horn Type (Driver Diameter 44 mm) |
| Frequency range (-10dB) | 30 Hz to 20 kHz |
| Frequency Response (± 3 db) | 45 Hz to 12 kHz |
| Coverage Angle (Horizontal x Vertical) | 90 ゜ x90 ゜ |
| Allowable Input (IEC Pink Noise) | Bi-Amp : 600W (LF), 50W (HF) Passive:300W |
| Sensitivity (1W, 1m) | 98dB SPL |
| Nominal impedance | 8 Ω |
| Crossover frequency | 1kHz |
| External dimensions | Width 651x Height 1,019x Depth 292 mm |
| Weight | 41kg |