M28 Master Series 7-Channel Power Amplifier

The Masters M28 Seven Channel Power Amplifier epitomises the ultimate in what is possible with today’s amplification techonology. It is one of the very first amplifiers to employ Purifi’s Eigentakt™ amplifier technology.

Rated conservatively at 200W per channel (8 ohms) and well over 320W dynamic power (8 ohms; all channels driven), the result is breath-taking, lifelike surround sound performance, be it from the latest action-packed film with tremendous dynamics or a subtle classical piece with delicate and detailed passages. The M28 can accept both balanced and single-ended inputs, and features high-quality binding posts for speaker connection. The compact dimensions of this highly energy-efficient design belie the massive amount of power available for the most demanding music and movies.

• FTC power, two channels
• ≥ 220 W (ref. rated THD, 8 Ohms , 20 Hz – 20 kHz, two channels driven)
  ≥ 400 W (ref. rated THD, 4 Ohms , 20 Hz – 20 kHz, two channels driven)
• Rated power, all channels
• ≥ 200 W (ref. rated THD, 8 Ohms , 20 Hz – 20 kHz, all channels driven)
  ≥ 340 W (ref. rated THD, 4 Ohms , 20 Hz – 20 kHz, all channels driven)
• Rated THD (250 mW to rated power, CCIF IMD, DIM 100)
• ≤0.003 % (ref. 20 Hz – 20 kHz)
• IHF dynamic power
• 280 W 8 Ohms, (all channels driven)
  560 W 4 Ohms, (one channel driven)
• Damping factor
• 1.3 V (ref. rated power)
• Input impedance
  Input Impedance (r and c)
• 47 kΩ (Balanced)
  23 kΩ (Single-ended)
• >118dB (ref. rated power)
  
• Damping Factor
• >750dB (ref. 8 Ohms, 50Hz and 1kHz)
• Frequency Response
• ±0.1dB (ref. 20Hz-20kHz)
• -2.5dB at 3Hz and 100kHz
  
• Input Impedance
• 47 kilohm (Balanced)
• Signal/noise ratio
• > 102dB (A-weighted ref. 1W, Balanced)
  > 97 dB (A-weighted ref. 1W, Single-ended)
  > 124 dB (A-weighted ref. rated power, Balanced)
  > 120 dB (A-weighted ref. rated power, Single-ended)
• Frequency response
• ± 0.1 dB (ref. 20 Hz – 20 kHz)
  – 3 dB at 3 Hz to 60 kHz