JBL UT-025 (2000)
The JBL UT-025 is a standalone super-tweeter system released in 2000. It sold as a pair for ¥90,000. It was designed to extend a system's response up to 70 kHz. The driver is a 2.5 cm hard dome with a diaphragm of sintered carbon graphite. The period literature says it was chosen for its combination of light weight and high hardness, which lets the thin diaphragm respond quickly to minute input signals.
The front baffle is 19 mm solid cherry, angled upward to control directional characteristics via a short horn in the opening. The edges are rounded to reduce irregular sound reflection. A built-in high-pass filter offers three crossover points - 12 kHz, 16 kHz, or 22 kHz, all at -12 dB/octave - selected with a switch on the rear. To avoid contact loss in that switch, JBL used gold-plated large binding posts. Rated impedance is 5 Ω, allowable input 50W, and output sensitivity 90 dB/2.83V/m. Each unit measures 190 × 130 × 130 mm and weighs 1.3 kg.
Beyond the release year and the original Japanese pricing, the historical record on the UT-025 is thin. No period reviews, production run details, or lineup positioning have surfaced. It remains a niche item among JBL collectors. It pairs a professional-grade driver with a furniture-grade cherry cabinet, aimed at the upper end of the Japanese domestic market.
- Type: 1-way, 1-speaker super-tweeter system
- Driver: 2.5 cm hard dome, sintered carbon graphite diaphragm
- Frequency response: Fc – 70 kHz
- Crossover: 12 / 16 / 22 kHz selectable, -12 dB/oct.
- Impedance: 5 Ω · Input: 50W · Sensitivity: 90 dB/2.83V/m
- Dimensions: 190 × 130 × 130 mm · Weight: 1.3 kg
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