GRS 1TM-4 1" Mylar Replacement Tweeter

The GRS 1TM-4 Replacement Dome Tweeter offers a practical solution for restoring crisp, detailed high-frequency reproduction in your loudspeakers. Designed as a direct replacement unit, this soft dome tweeter is ideal for repairing or upgrading existing speaker systems where the original tweeter has failed or underperformed. Whether you are refurbishing vintage cabinets, customising a DIY project, or simply seeking to breathe new life into tired speakers, the 1TM-4 delivers reliable performance with straightforward installation.

Featuring a 25.4 mm soft dome diaphragm, this tweeter produces smooth, natural treble without the harshness often associated with harder materials. Its 4 ohm impedance and 3.5 ohm DC resistance ensure compatibility with a wide range of crossover networks and amplifier loads. The resonance frequency is set at 3 kHz, allowing for seamless integration with midrange drivers. Sensitivity is rated at 90 dB SPL at 1 metre with 2.83V input, providing ample output for most listening environments. The voice coil inductance is a low 0.1 mH, contributing to extended high-frequency response. With a cut-out diameter of 49.8 mm and a total depth of 18 mm, the tweeter fits neatly into standard mounting holes. The overall dimensions are 74.2 mm, making it a compact yet capable component for your audio restoration or build.