The Blam Relax 100RFC is a 100 mm 2-way high-efficiency coaxial speaker kit featuring two 100 mm woofers with coaxial 20 mm soft dome tweeters and an integrated 6 dB/octave high-pass crossover. Rated 50 W nominal and 100 W maximum, the kit offers a frequency response of 80 Hz to 30 kHz, 90.3 dB sensitivity and a 2 ohm impedance.

Drivers use treated cellulose pulp cones, butyl peripheral suspensions, 25 mm voice coils on Kapton support and a glass fiber reinforced composite basket with a 70 mm x 15 mm ferrite motor and 4 mm magnetic circuit. The package includes fixing screws and instructions for use and is intended for installation in 100 mm (4 inch) speaker openings.