Musicbook POWER II
What makes actually a good power amplifier? Sufficient output, good technical specs with low distortions and a high damping factor, perhaps also a high efficiency. This is certainly true, but doesn’t say much about the acoustic result we can achieve with a loudspeaker. A really good power amp can drive a loudspeaker in such a way that even the very last ounce of musical information becomes perceivable. And always in a sovereign and very relaxed manner.
The Musicbook POWER II is not only the ideal game partner for the Musicbook SOURCE, but also knows how to get even the finest musical details out of a loudspeaker. Of course, with excellent measured values and minimal power consumption.
Mono beats Stereo.
A unique feature of the Musicbook POWER II is the possibility to run one power amp per channel in “vertical bi-amping" mode. This requires a loudspeaker with separate connections for the bass and the high/midrange. Each range is driven by a proprietary power amp. The result is a clear improvement in sound quality in the fundamental range and an enhanced overall transparency of reproduction. In most cases the bass range will equally benefit from this.
In bi-amping mode the Musicbook POWER II offers a level control for the bass which is now adjustable in ten steps. This feature is a real problem solver in many living rooms. Depending on the speaker placement less can be more here! This is especially true of large speakers which are difficult to set up.
The Musicbook POWER II is a top-level class-D amplifier. This "N-CORE" design (a reference to "encore") is nothing but a revolution in this field. The measured values of these amplifiers are remarkable for several reasons: very low distortions, an extremely high damping factor and a linear frequency response up to 45 kHz. Even more important is the fact that the distortions will not increase at high modulation or towards high frequencies, and the frequency response does not depend on the speaker impedance. Hence the connected loudspeaker does exactly what it’s supposed to do. It is controlled perfectly. The result is a supremely musical reproduction without any resonances or colorations.
DESIGNED IN GERMANY.
Please note: The values in brackets apply to the POWER 1000!
Mains connection: 90-240 V, 50-60 Hz
Power consumption: 0,5 W stand-by, 16 (26) W operation, 650 (1200) W max.
Dimensions (W x H x D): 280 x 220 x 63 mm
Weight: 2,9 (3,4) kg
XLR Inputs: balanced, analog line-level inputs
Input voltage for full modulation: 1,68 V (2,38 V)
Input impendance: 20 kOhms
Speaker outputs: banana plugs (4 mm)
Speaker impendance range: 4 – 8 Ohms
Output power: 2 x 250 W @ 4 Ohms (2 x 500 W @ 4 Ohms)
Gain: 26 dB
THD: < 0,003%
Frequency response: 1 Hz – 50 kHz (-3 dB)
Signal-to-noise ratio: > 110 dB
Switch-on threshold: ca. 0,2 mV balanced
Switch-on delay: ca. 2-3 seconds
Switch-off time: ca. 60 minutes
DC at output: Amplifier switches off. The display lights up red continuously. The unit must be disconnected from the mains for 10 seconds and restarted.
Overtemperature: Amplifier flashes red. Cause: Overload, insufficient convection cooling, room temperature too high. If the temperature continues to rise, the amplifier is switched off, until the unit has cooled down.
Current limiting: Amplifier switches off the signal. Switching threshold output current: 17.5 A (27 A).