Numan OCTAVOX 702

100 W, 4 Ω, 215 x 247 x 335 mm, 6.3 kg, white The OCTAVOX Bookshelf offers a high quality reproduction of the full frequency spectrum in a room up to 25sq. For bigger rooms and high listening levels, we recommend the use of a subwoofer. For optimal sound, place the speakers on a speaker stand, a solid desk or shelf. Leave at least 30cm space in the back and on both sides, to avoid boosted and imprecise bass reproduction. Please note our amplifier recommendations at the end of this manual. If using the OCTAVOX Bookshelf as a rear speaker, even 30 Watts per channel will be sufficient.