Sub (Gen 3) NW-A105B Features: Both Class-D digital amplifiers have been perfectly tuned to the unique acoustic architecture. Dual acoustic ports have been precisely tuned to enhance performance. Frequency Response As low as 25 Hz Audio settings automatically equalise to balance Sub and the paired Sonos speaker(s) or component. Use the Sonos app to adjust bass, treble and loudness. This software measures the acoustics of the room then fine-tunes your Sonos system. Supported iOS device required. Specifications: Dimensions Height: 15.3 in (389 mm) Width: 15.8 in (402 mm) Depth: 6.2 in (158 mm) Colours White Weight 36.3 lb (16 kg) Finish Gloss Join Button Press once to add Sub to your system during setup. WiFi Connect to WiFi with any 802.11a/b/g/n 2.4 or 5 GHz broadcast-capable router. Ethernet 10/100 port for hardwiring to your router CPU Quad Core 1.5 GHz Memory 256 MB SDRAM 256 MB NAND Flash Voltage 100-240V 50/60Hz internal power supply Operating Temperature 0°C to 40°C