JBL 4340/4341
Released in 1974
4340 : ¥ 721,000 (1 unit, around 1975)
4340 wx : ¥ 793,000 (1 unit, around 1975)
4341 : ¥ 739,000 (1 unit, around 1975)
4341 wx : ¥ 791,000 (1 unit, around 1975)
Commentary
This 4-way speaker system inherits the technology developed in 4350.
The 4340 uses a multi-amplifier system and the 4341 uses a network system.
It has a 38 cm cone Woofer 2231A in the low range and a 25 cm cone Woofer 2121 in the middle and low range.
A horn-type mid-range combining a driver 2420, an exponential horn 2307, and an acoustic lens 2308 is installed in the mid-range region, and a horn-type tweeter 2405 is installed in the high-range region.
Each unit features an Alnico V magnet, an edge-wound ribbon voice coil, and a gap. The mid-low band unit 2121 was newly developed for the 4340/4341 and features a strong magnet assembly with a magnetic flux density of 10,000 gauss and a weight of 2.9 kg to improve sound quality.
The directional characteristics are 60 ° horizontal and 30 ° vertical at 16 kHz.
You can adjust the levels of mid-low, mid-high, and high frequencies from the front panel.
The 4340 used in the multi-amplifier system requires a power amplifier, a divider 5231 or 5232 and a filter board 52 to 5140.
There were 2 kinds of variations, gray finish and walnut finish for each.
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Model Rating
| Method | 4-Way, 4-Speaker, Bass Reflex System, Floor Type | ||
| Units Used | For low band : 38 cm cone type (2231A) Medium and low band : 25 cm cone type (2121) For Middle and High Area : Horn Type (2420 + 2307 + 2308) For High Pass : Horn Type (2405) |
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| Frequency characteristic | 35 Hz to 20 kHz ± 3 dB | ||
| Allowable input (Continuous Program) |
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| Impedance | 8 Ω | ||
| Sound pressure level (new JIS) | 93dB | ||
| Crossover frequency | 300 Hz, 1.25 kHz, 9.5 kHz | ||
| Enclosure internal volume | 156liters | ||
| External dimensions | Width 600x Height 950x Depth 500 mm | ||
| Weight | 4340:72kg 4341:73kg |