This is the Lab report on what they will be like to drive, seems like these unlike their more expensive range are very easy to drive by anything short of rubbing two sticks together. I recommend a baby Class-A like the pass labs XA or even tubes.
" Sonus faber claims a 90dB sensitivity for the Venere S, close to our measured 89.5dB pink noise figure. Remarkably, this high sensitivity is achieved without recourse to low impedance. Sonus faber specifies a 4ohm nominal figure, with our results showing a minimum of 3.9ohm at 44Hz, but what sets the Venere S apart is its unusually well-contained impedance phase angles. Whereas phase angles in excess of 50o are not unusual, the Venere S’s largest absolute phase angle is just 28o . As a result the minimum EPDR (equivalent peak dissipation resistance), over the same 20Hz-20kHz, is 2.7ohm – a full 1ohm higher than typical of floorstanders of this size and class. As modern speakers go, the Venere S is unusually easy to drive. Forward frequency response [Graph 1, below], measured at tweeter height, evinces a mildly rising trend up to 10kHz, after which output falls by 4dB at 20kHz and dives thereafter. But the response error of just ±2.2dB for both speakers of the pair (300Hz-20kHz) is a fine result, especially for a speaker of this price. (Ignore the response fall-off below 350Hz which is an artefact of a shorter than usual measurement time window.) No less remarkable is a pair matching error of just ±0.6dB over the same frequency range. The diffraction-corrected nearfield measurement showed the Venere S’s bass extension to be 53Hz (–6dB re. 200Hz), a typical figure for a floorstander of this size and sensitivity. Because the response falls off a cliff above 20kHz, extension to ultrasonic frequencies is less impressive. The cumulative spectral decay waterfall [Graph 2, below] shows fast initial decay at treble frequencies albeit with a low-level resonance visible at 2.5kHz. KH"
Cheers George
" Sonus faber claims a 90dB sensitivity for the Venere S, close to our measured 89.5dB pink noise figure. Remarkably, this high sensitivity is achieved without recourse to low impedance. Sonus faber specifies a 4ohm nominal figure, with our results showing a minimum of 3.9ohm at 44Hz, but what sets the Venere S apart is its unusually well-contained impedance phase angles. Whereas phase angles in excess of 50o are not unusual, the Venere S’s largest absolute phase angle is just 28o . As a result the minimum EPDR (equivalent peak dissipation resistance), over the same 20Hz-20kHz, is 2.7ohm – a full 1ohm higher than typical of floorstanders of this size and class. As modern speakers go, the Venere S is unusually easy to drive. Forward frequency response [Graph 1, below], measured at tweeter height, evinces a mildly rising trend up to 10kHz, after which output falls by 4dB at 20kHz and dives thereafter. But the response error of just ±2.2dB for both speakers of the pair (300Hz-20kHz) is a fine result, especially for a speaker of this price. (Ignore the response fall-off below 350Hz which is an artefact of a shorter than usual measurement time window.) No less remarkable is a pair matching error of just ±0.6dB over the same frequency range. The diffraction-corrected nearfield measurement showed the Venere S’s bass extension to be 53Hz (–6dB re. 200Hz), a typical figure for a floorstander of this size and sensitivity. Because the response falls off a cliff above 20kHz, extension to ultrasonic frequencies is less impressive. The cumulative spectral decay waterfall [Graph 2, below] shows fast initial decay at treble frequencies albeit with a low-level resonance visible at 2.5kHz. KH"
Cheers George