JBL 4310H
The 4310H is a compact 2-way bookshelf monitor that JBL sold in Japan around 2003, priced at ¥58,000 per pair. It's a different model from the 1960s alnico 4310 studio monitor, and the archive keeps the two separate. What we know about the H version comes mostly from period Japanese catalog data.
The low end is handled by a 13.3 cm cone woofer with a white pulp diaphragm and an accordion-pleated edge. The tweeter is a 1.9 cm dome with a titanium-laminated diaphragm, mounted to a horn with an equalizer. JBL's stated aim was a brighter top end with a more relaxed character. A three-position attenuator switch trims the tweeter output level. Both drivers are magnetically shielded with a canceling magnet and shield cover, so the 4310H was clearly meant for close placement to video monitors.
The enclosure is bass reflex, with twin ports arranged symmetrically on the left and right sides. JBL said this pursued "low sound reproduction that is more crisp and rich in volume." At just 181 × 300 × 180 mm and 4.0 kg, these are small speakers. Rated frequency response is 60 Hz to 20 kHz, with 75W RMS allowable input, 4 Ω impedance, 90 dB/2.83V/m output, and an unusually high crossover point of 8 kHz.
A set of three units was also sold as the 4310H3 for theater use at ¥87,000. JBL offered several mounting accessories: the JS-12 wood stand (¥12,000 per pair), the MTC 520 wall bracket (¥8,000 per pair), and the MTC 601 ceiling adapter (¥3,600 per pair). The last two point to the 4310H's intended role as a surround or effects monitor.
Documentation on the 4310H is thin. There are no production run dates, no period reviews, and no measured performance data beyond the catalog specs above. What survives is the spec sheet and the used market. Japanese auction results from the past 180 days show pairs selling anywhere from 5,775 yen to 37,800 yen, with most landing in the 14,000-27,000 yen range. A Russian marketplace listing asking 55,000 ₽ calls the model "very rare," though that's a single seller's claim. The audio-database.com catalog data (March 2003) is the primary source for the specifications listed here.
- Type: 2-way, 2-speaker, bass reflex, bookshelf
- Woofer: 13.3 cm cone (white pulp diaphragm, accordion edge)
- Tweeter: 1.9 cm horn-loaded dome, titanium-laminated diaphragm
- Frequency response: 60 Hz – 20 kHz
- Input power: 75W RMS
- Impedance: 4 Ω
- Output: 90 dB / 2.83V / m
- Crossover: 8 kHz
- Dimensions: 181 W × 300 H × 180 D mm
- Weight: 4.0 kg
eBay Listings
As an eBay Partner, we earn from qualifying purchases. This helps support our independent vintage technology research.
Related Models
- JBL 075
- JBL 077
- JBL 120Ti
- JBL 124A
- JBL 124H
- Braun AUDIO-1 (1965)
- Braun AUDIO-250 (1965)
- Magnavox Component Systems (1972)
- Acoustic Research AR (1967-1976)
- Acoustic Research 11