SA140DIY

Dual Mono Amplifier Stage 4

The gallery below shows a DIY amplifier stage 4 

Main components:

2 x Amplifier modules.

2 x Power Supply modules.

1 x XLR/RCA Input Selector & PreAmp.

1 x Power Supply For INP22A.

1 x Soft Starter.

2 x Toroidy 2x42V/400VA Transformers.

2 x Capacitive Touch Buttons.

1 x Hifi2000 Dissipante Cabinet.

Measurements in true/realistic environment:

Power output RMS watts, 1KHz 0.2% THD:

86 Watts    37.9 Vac    16.6 ohms.

152 Watts   35.6 Vac    8.3 ohms.

254 Watts  32.7 Vac     4.2 ohms.

342 Watts  26.8 Vac     2.1  ohms.


THD: 0.0039% @ 10 Watts, 8 ohms., 1 KHz.             SA140TINY THD.pdf

IMD: 0.016% @ 10 Watts, 8 ohms., 1 KHz.


SNR: 0.28mV: 102dB (non weighting) @ 8.3 ohms.


Linearity:                                      

5 Hz- 45 KHz +/- 0.1dB.

5 Hz - 270 KHz +/- 3dB.        


Weight: 18.6 Kg.  

Size: 450 x 450 x 90 mm.

Scematics of 4 different levels of SA140DIY

Stage 1:

Basic amplifier.


2x SA140TINY Amplifier modules.

1 x PS140TINY Power Supply modules.


Stage 2:

Basic amplifier with soft starter.


2x SA140TINY Amplifier modules.

1 x PS140TINY Power Supply modules.

1 x SS100A Softstarter.


Stage 3: 

Basic amplifier with soft starter & balanced input controller.


2x SA140TINY Amplifier modules.

1 x PS140TINY Power Supply modules.

1 x SS100A Softstarter.

1 x INP22A XLR/RCA Input Selector.

1 x INP22PSU Power Supply For INP22A.


Stage 4:

Dual mono amplifier with soft starter & balanced input controller, XLR & RCA inputs.


2x SA140TINY Amplifier modules.

2 x PS140TINY Power Supply modules.

1 x SS100A Softstarter.

1 x INP22A XLR/RCA Input Selector.

1 x INP22PSU Power Supply For INP22A.

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