JBL 4428 Studio Monitor

The JBL 4428 is a three-way studio monitor that followed the company's 4400 series concept. It was used as a reference speaker in the recording industry. The surviving documentation is mostly spec-sheet material. No production years, original pricing or period reviews have surfaced in the available record. What's known comes from product listings and database entries, and the details are consistent across them.

The 4428 pairs an 8-inch cone woofer with a 4-inch cone midrange and a 1-inch titanium dome tweeter, crossing over at 600 Hz and 3.8 kHz. Frequency response is rated at 38 Hz to 21 kHz, sensitivity at 90 dB SPL (2.83V, 1m), and nominal impedance at 8 ohms. Power handling is 150 watts continuous, 300 watts program. The cabinet is a vented (ported) design in walnut, measuring 561 × 330 × 318 mm and weighing 28.1 kg. It uses 5-way binding posts and can be bi-amped.

The 4428 was sold in matched sets of three for studio use - left, center and right reference channels. There's no documented information on common failures or maintenance issues. Nothing says where the model sat in JBL's monitor lineup relative to the 4425 or 4430. For a professional studio reference, the written record is thin.