Musical Fidelity M1 HPA Headphone Amplifier

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Product Information

We all know that when we listen to pure Class A amps such as the AMS35i or AMS50 that the sound is incredible. It is richer, fuller, smoother and the bottom end is more extended. That's why the reputation of pure Class A amplifiers remains so strong; they really are the best thing.

Musical Fidelity has a long history of making superlative headphone amplifiers. The M1 HPA pure Class A headphone amp has exactly the same sonic characteristics with headphones as our pure Class A amplifiers with loudspeakers. It sounds fantastic.

The M1 HPA pure Class A headphone amp's technical performance is outstanding. Distortion is incredibly low (less than .0005% across the band) frequency response is ruler flat. Noise ratio is outstanding. In every technical parameter the M1 pure Class A headphone amp is outstanding.

The HPA has very low output impedance (below 1 ohm). Headphone amps' output impedance is a usually ignored but very important measurement. The HPA's extraordinary low output impedance means that it can drive any headphone with complete linearity and low distortion. The vast majority of competitive headphone amplifiers cannot do this because they have much higher output impedance.

We believe that neutrality and complete faithfulness to the original recording is what hi-fi exists for. If you agree with that ideal then the HPA pure Class A headphone amp is for you.

The HPA has two inputs; line and USB (from computers etc.). It has two headphone sockets on the front panel and a loop out facility.

Importantly the HPA also has a variable line output so that it can be used as a very high quality simple preamp.

Musical Fidelity M1 HPA Headphone Amplifier Specifications:

Output 

• Output Power  1.1W into 32Ω
• Output impedance  less than 1Ω
• Output level   5.2V rms max 
• Frequency response  15Hz to 75kHz -3dB max. 
• Signal to noise  >109dB “A”- wtd 
• Total harmonic distortion   <0.008% 10Hz to 20kHz 

Connections 

• Line level input  1 pair RCA line in left and right  
• Line level outputs  1 pair RCA line out left and right  
• 1 pair RCA pre-out left and right    
• Digital input  1 USB type ‘B’ connector for computer/PDA 

Power requirement 

• Mains voltages  90-250VAC 50/60Hz  
• Consumption 25 Watts 

Weight 

• Unit only, unboxed   3.4 kg (7½ lbs)   
• In shipping carton & inc. accessories 4.1 kg (9 lbs)  

Dimensions 

• Wide   220 mm (8⅔”)  
• High, including feet   100 mm (4”)  
• Deep (front to back)   300 mm (12”) including terminals 

Standard accessories 

• IEC type mains lead (10-Amp type)