Technically the GS401 speaker was specified as infinite baffle enclosure with crossover points at 475 Hz and 5,000 Hz. The enclosure was constructed for three layer high density 18 mm thick chip-board, incorporating internal bracing to eliminate panel resonances.
GS401 frequency response was quoted at 55 Hz to 20 kHz (+/- 3 dB) in the G.E.C. Hirst Research Centre anechoic chamber. 35 Hz to 20 kHz (+/- 5 dB)
Impedance 4-8 ohms. Fuse protected: balance controls for midband and treble. Compact speaker designed for uses as a bookshelf unit or can be placed on Gale speaker stands. Fuse ratings: Main 1.25 x 5 Amp quickblow. HF Fuse: 5 x 20 630 milliAmp quickblow. Suggested Minimum Amplifier Power: 60 Watts. Speaker may be placed vertically or horizontally on stand.
Dimensions: GS401A: 33 cm W x 27 cm D x 60.5 cm L. Weight: 51 lbs. net