Amplificator de putere Accuphase A-47

Full Description

Overview

The Exhilaration of Pure Class A. An amplifier operating in pure Class A always produces its full rated output power, regardless of the actual output requirement. This no-holds-barred approach which requires a hefty power supply and output stage results in fabulous audio performance, making such a power amplifier the dream of audiophiles worldwide. The Pure Class A Stereo Power Amplifier A-47 represents the state of the art in this field. Featuring large external heat sinks that allow well balanced dimensions, it delivers 45 watts of impeccable power into 8 ohms, taking the listener into a new realm of musical enjoyment.

 

Specs

Continuous Average Output Power (20 – 20,000 Hz):

Stereo operation (both channels driven):

360 watts per channel into 1 ohm (＊)

180 watts per channel into 2 ohms

90 watts per channel into 4 ohms

45 watts per channel into 8 ohms

 

Monophonic operation (bridged connection):

720 watts into 2 ohms (＊)

360 watts into 4 ohms

180 watts into 8 ohms

 

Total Harmonic Distortion:

Stereo operation (both channels driven):

0.05% with 2 ohm load

0.03% with 4 to 16 ohm load

 

Monophonic operation (bridged connection):

0.05% with 4 to 16 ohm load

 

Intermodulation Distortion: 0.01％

 

Frequency Response :

At rated continuous average output: 20 – 20,000 Hz ＋0, －0.2 dB

At 1 watt output: 0.5 – 160,000 Hz ＋0, －3.0 dB

 

Gain: 28.0 dB (with GAIN selector at MAX)

(Stereo and monophonic operation)

 

Gain Selection: MAX, －3dB, －6dB, －12dB

 

Output Load impedance:

Stereo operation: 2 to 16 ohms

Monophonic operation: 4 to 16 ohms

With music signals only, 1-ohm loads are permissible for stereo operation

and 2-ohm loads for bridged operation.

 

Damping Factor: 600

 

Input Sensitivity (with 8-ohm load, GAIN selector in MAX position):

Stereo operation:

0.76 V for rated continuous average output

0.11 V for 1 watt output

 

Monophonic operation:

1.51 V for rated continuous average output (240 W)

0.11 V for 1 watt output

 

Input Impedance:

Balanced: 40 kilohms

Unbalanced: 20 kilohms

 

Signal-to-Noise Ratio (A-weighted, input shorted):

161 dB (GAIN selector at MAX)

121 dB (GAIN selector at －12 dB)

At rated continuous average output

 

Output Level Meters :

–40 dB to +3 dB (indication in dB and %)

Logarithmic scale, with illumination off switch and sensitivity selector (–20 dB)

 

Power Requirements:

120 V, 220 V, 230 V AC (voltage as indicated on rear panel), 50/60 Hz

 

Power Consumption:

200 watts idle

410 watts in accordance with IEC 60065