The new Slán 601 & 605 establish a real benchmark in the on-wall speaker market. Featuring a tuned cabinet, they reach a frequency response as linear as bookshelves or floorstanders of the same kind. Thanks to the AVS patented technology, the low frequency response is not reduced as the case for most of the on-wall speakers. Slán 601 & 605 are benefit from the same quality of components than the new Oran 4401 & 4405, delivering the same excellent bass while hiding from view. The tweeter can be oriented for a better response in a wider listening area.. AVS The AVS technology makes the speaker perfectly tuned when low frequencies are reached, despite of the narrow depth of the cabinet. The specific geometry of the AVS leads to the limitation of the noise caused by the air getting out of the vent. The AVS is a patented Highland Audio technology Type : 2 ways bass-reflex Recommended amplifier : 10 - 90W Sensitivity : 87 db/1 W/1 m Impedance : 6 ohms Frequency response: 39Hz - 25 kHz Dimensions : H31.2” x W13.5” x D4.2” / H793 x W343 x D108 mm Weight : 22.5 lbs, 10,2 kg