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Mastersound Tube Amplifiers from Italy

 

 

Mastersound PF 100 Limited Monoblock 845 Power Amplifier

 

Ultra Audio

Nov 1 2007

Garrett Hongo

Mastersound Reference Pf 100 Limited monoblocks 

 

"Playing American big-band music, they sounded fast, very detailed, and powerful. Sanavio explained that the Pf 100 is a zero-feedback, semi-auto biasing, parallel 845 SET amp putting out 117W -- all in class-A.

 

The parts are of the highest quality: Mundorf caps, silver-alloy solder, gold-plated sockets, and transformers hand-built in the Mastersound factory in Vicenza.

 

The monos are a brand-new design that Sanavio thinks may be the most powerful single-ended, pure class-A amp on the planet.

 

When I heard the Pf 100s, staying for about 40 minutes (about seven generations of Top Audio drop-ins) while the system played American jazz, Renaissance choral, and classical orchestral music, the amps exhibited excellent control, put out a rich and harmonically saturated sound, and while the tubes were hot enough to scramble eggs on, the transformers remained absolutely cool. With Sarah Vaughan singing "In a Sentimental Mood," the amps gave her voice such a clear and firm melodic line, fleshing out her melismatic flourishes and other vocal ornaments with such remarkable sonic weight and realism, that it was as though I’d never heard the recording before."

 

 

Mastersound PF 100 Limited

Mastersound PF 100 Limited Monoblock 845

 

 

Mastersound PF 100 Limited Monoblock 845

 

  • Parallel Single Ended in Class "A"
  • Power: 2 x 117 Watt
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  • Parts : parts are of the highest quality: Mundorf caps, silver-alloy solder, gold-plated sockets, and transformers hand-built in the Mastersound factory in Vicenza.
  •  

  • Power tubes: 2 x 4 x 845
  • Drivers tubes: 2 x 3 x 6SN7 EH
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  • Input impedance: 100K OHM
  • Input: 1 x RCA
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  • Output transformer: MASTERSOUND
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  • Board with 24 k gold tracks
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  • Load impedance: 4 – 8 Ohm
  • Negative feedback: 0 dB
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  • Bandwidth: 12 Hz / 100 kHz – 0 dB
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  • Dimensions: 54 x 47 x 27 cm. ( 22 x 18,5 x 10,6 in) per unit
  • Weight: 50 Kg. ( 114,6 lbs ) per unit
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