Faced with exactly the same challenges as the M1.1, the A1.5 embodies the same sophisticated, modular and scalable approach. It might be (slightly) smaller than the M1.1 and around two-thirds of its weight, but it’s still four amplifiers in one. It still offers the same adaptable, software controlled topology, adjustable input configuration and gain, user selectable global feedback ratio and cost-effective upgrade path. It offers exactly the same, incredibly short signal path, fully discrete, fully balanced and fully complementary circuit, built with the same carefully selected components to the same exacting standards. Even the casework, although shorter, has the same footprint, uses the same construction and includes the same mechanical grounding/stacking system. In fact, in every important way, the A1.5 is, quite literally, an M1.1 writ small – or, in Hollywood terms, “Honey, I shrank the amp…”.
SPECIFICATIONS
Nominal input voltage
2.2V RMS balanced
1.1V RMS single-ended
Input impedance
94kΩ balanced
47kΩ or 300Ω single-ended
Output power
2x 150W / 8Ω, 2x 275W / 4Ω, 2x 450W / 2Ω in stereo and bi-amp modes
1x 275W / 4Ω, 1x 450W / 2Ω, 1x 700W / 1Ω in monaural mode
1x 550W / 8Ω, 1x 800W / 4Ω, 1x 1200W / 2Ω in bridged mode
Bandwidth
DC to 450kHz (-3dB) at 1W into an 8Ω resistive load
Signal to Noise Ratio
> 115dB in stereo and bi-amp modes
> 118dB in bridged mode
Total Harmonic Distortion + Noise
< 0.1% (0% global feedback)
< 0.01% (100% global feedback)
Max power consumption
1800W
Dimensions/Weight
440 x 440 x 198mm (W x D x H), 47kg