JBL SR4735A
The SR4735A is a professional three-way sound reinforcement speaker from JBL's SR Series. It uses a 38 cm (15") 2226G cone woofer, a 20 cm (2119H) cone midrange and a 2417H compression driver on a 2371 horn (90° x 40° coverage). The cabinet is a bass reflex, floor-standing design rated at 99 dB/W/m, with a nominal impedance of 4 ohms and 600W continuous pink noise handling. The crossover sits at 600 Hz and 2.8 kHz. A switch gives 2-way multi-amplifier operation, with a recommended active crossover point of 800 Hz to 1.2 kHz. Frequency response is specified at 35 Hz to 20 kHz (-10 dB). Dimensions are 635 x 921 x 460 mm (W x H x D), and each cabinet weighs 41.8 kg.
Documentation on the SR4735A is thin. Most of the record comes from a single Japanese audio database entry and a used listing. The database lists the original price at ¥250,000 per unit around 1994, with a later listing around 1997 at ¥230,000. The Craigslist listing describes these as SR Series II cabinets and says the series used a cone midrange driver rather than a horn, which gave a warmer tone than the earlier SRX design. The same listing says the cabinets had their original tolex covering replaced with fabric, and that they are bi-amp ready with both Neutrik and 1/4" connectors. One forum user described the SR series as having proper JBL Pro drivers, and compared them favorably with entry-level JBL gear. The speaker was marketed as ideal for small-scale concert halls. A ProSoundWeb user noted the 35 Hz low-end figure seems optimistic, which is a fair point for a 15" PA cabinet.
Beyond that, the record is quiet. No production years, no US MSRP, no service information, and no independent measurements have surfaced. What exists is a solid, workmanlike pro speaker that clearly did its job in the 1990s without generating much paper trail.
- **Type:** 3-way, 3-speaker, bass reflex, floor type
- **Drivers:** 2226G 38 cm woofer / 2119H 20 cm mid / 2417H + 2371 horn
- **Impedance:** 4 Ω (8 Ω high-frequency section in bi-amp mode)
- **Power handling:** 600W continuous pink noise (IEC)
- **Sensitivity:** 99 dB/W/m
- **Crossover:** 600 Hz, 2.8 kHz (internal); 800 Hz - 1.2 kHz recommended for bi-amp
- **Dimensions:** 635 x 921 x 460 mm
- **Weight:** 41.8 kg
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