Tuesday, 28 May 2019
Thursday, 3 January 2019
Auna AV2-CD508BT Hi Fi Amplifier to High End Preamplifier AUX bluetooth
How to made an economic High End Preamplifier.
My Auna CD508 project: from Hi Fi power amplifier to High End Preamplifier with Phono MM and MC.
The original amplifier has a switching power supply, the input selector is made by CD4052 and power amplifier is made by Texas Instruments AB class IC, LM1875 in bridge connection. The power rails voltage are +16/0/-16 Vdc and it as some features like tone control, BT connection balance, remote control , motorized volume knob, output relay, 3 inputs(4 with BT) , a tape recording output and a headphones out.
Estimated power output on 8ohm should be around 50W/CH.
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Amplifier Auna AV2-CD508BT before mod |
I dismounted the power amplifier section and I made a substitution with my Espritaudio Preamplifier modules: ESPRE
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Preamplifier Auna AV2-CD508BT after mod |
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Bridge connection of LM1875 |
Etichette:
100W,
Amplificatore,
Amplifier,
Audiograde,
AUNA,
bidge,
Class AB,
Headphones,
LM1875,
MC Cartridge,
mod,
Pre Esprit,
Preamplifier,
Project,
Selector,
Tape
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