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Belles Audio - 28A Preamplifier

 

Pure Audio LLC
"Let The Music Touch Your Soul!"

 

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Specifications:

General

Controls Listen, record, Volume and Balance
Remote Controls Power On/Off, Mute, Volume, Input and Mon
Dimensions 17" (432mm) W x 5" (127mm) H x 12.5" (318mm) D (excluding jacks, knobs and feet)
Shipping Weight 26 pounds (11.2 Kg)
Power 120 VAC or 240 VAC @ 50/60 Hz
Power rating 50 volt amperes toroidal transformer
Fuse 0.5A Slo Blo
Filter Capacity 40,000 microfarads total
Warranty 5 years

Line Section

Frequency Response 20 Hz to 20,000 Hz +/- 3 dB
Hum and Noise 90 dB A weighted
Distortion less than 0.01% IM and THD
Input Impedance 20,400 ohms center tapped balanced
50,000 to 100,000 ohms unbalanced
Output Impedance 50 ohms unbalanced
100 ohms center tapped balanced
Maximum Output 6.7 volts rms
Gain 7.0 dB
Crosstalk 60 dB

Moving Magnet Phonograph section

Frequency Response 20 Hz to 20,000 Hz +/- 0.1 dB
Hum and Noise 100 dB (1 volt reference)
Distortion less than 0.05%
Input Impedance 47,000 ohms
Maximum Output 6.7 volts rms
Gain 40 dB

Moving Coil Phonograph section

Frequency Response 20 Hz to 20,000 Hz +/- 3 dB
Hum and Noise 76 dB (mm + mc)
Distortion less than 0.02%
Input Impedance Adjustable at extra RCA input 0 to 1000 ohms
Gain 26 dB

 


 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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