About Us
Signature S4
Design 3-driver,
2-1/2-way bookshelf / stand-mounted, MagneShield™††
Crossover(s) 3rd-order electro-acoustic at 1.9 kHz, 2nd-order electro-acoustic at 400 Hz (bass driver)
High-Frequency Driver(s) 25-mm (1 in) P-Be™ pure-beryllium dome, rear damping chamber with ARB™ aperiodic resonance breakup fins and integrated heatsink, ferro-fluid cooled,
dual super neodymium magnets,
die-cast heatsink chassis,
IMS / SHOCK-MOUNT™
Bass / Midrange Driver(s) 178-mm (7 in) Co-Pal™ cobalt-infused pure-aluminum cone, dual-layer 38-mm (1-1/2 in) rigid, low-mass voice coil, massive ceramic / ferrite magnets, ATC™ asymmetric tapered dual-channel die-cast aluminum chamber,
solid aluminum phase plug,
AVS™ die-cast heatsink chassis,
IMS / SHOCK-MOUNT™
Bass Driver(s) 178-mm (7 in) mineral-filled polypropylene cone, dual-layer 38-mm (1-1/2 in) rigid, low-mass voice coil, massive ceramic / ferrite magnets, AVS™ die-cast heatsink chassis, IMS / SHOCK-MOUNT™
Low-Frequency Extension* 35 Hz (DIN)
Frequency Response:
On-Axis

±2 dB from 56 Hz - 45 kHz
30° Off-Axis ±2 dB from 56 Hz - 20 kHz
Sensitivity - Room / Anechoic 91 dB / 88 dB
Suitable Amplifier
Power Range
15 - 325 watts
Maximum Input Power† 180 watts
Impedance Compatible with 8 ohms
Internal Volume 21.4 L / 0.75 cu ft
Height, Width, Depth
(Height includes spikes or outrigger feet)
55.9 cm x 21.0 cm x 35.6 cm
22 in x 8-1/4 in x 14 in
Weight 39.0 kg / 86 lb per pair
Finishes Cherry, Natural Maple, Piano Black
Speaker Stands Paradigm® J-23