E4 Architectural specifications The 2-way, passive loudspeaker shall consist of a 4" low frequency driver with a neodymium magnet assembly and a coaxially mounted 0.75" dome tweeter. The sealed enclosure shall be injection molded with an impact resistant black finish. The drivers shall be protected by a rigid metal grill backed by an acoustically transparent foam. Special colours according to RAL table shall be available upon request. The cabinet shall incorporate a M10 threaded inserts on the rear panel for the secure attachment of wall mounts. The connection panel on the back shall be recessed and fitted with two NL4 sockets and a two pole push terminal block. The loudspeaker shall only be operated by a dedicated, compatible controller amplifier. The loudspeaker shall have a nominal conical dispersion angle of 100°. The power handling capacity shall be 60 W RMS and 400 W peak (10 ms). The frequency response (–5 dB) measured on axis shall be 130 Hz to 20 kHz with a maximum sound pressure of at least 114 dB. The dimensions shall not exceed 120 x 150 x 106 mm (4.7" x 5.9" x 4.2" - WxHxD) and shall weigh no more than 1.1 kg (2.4 lb). The loudspeaker shall be the E4 by: d&b audiotechnik GmbH & Co. KG.