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![](https://static.wixstatic.com/media/4b933e_6b552a15f4b44105b6e7545d3d844f2d~mv2.png/v1/crop/x_0,y_613,w_1920,h_109/fill/w_193,h_11,al_c,q_85,usm_0.66_1.00_0.01,enc_avif,quality_auto/4b933e_6b552a15f4b44105b6e7545d3d844f2d~mv2.png)
STC FIRMWARE UPDATE
NOTE:
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Please do not perform this firmware update without authorization from your distributor/dealer.
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Risk of bricking the amplifier should firmware update goes south
STEP 1:
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Open the top cover, identify the volume control chip, i.e. MUSES 72320, or BB2310.
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![EX-M1+ 730.jpg](https://static.wixstatic.com/media/4b933e_9764d9db071e4746ae6d08592d167882~mv2.jpg/v1/fill/w_956,h_636,al_c,q_85,usm_0.66_1.00_0.01,enc_avif,quality_auto/EX-M1%2B%20730.jpg)
STEP 3:
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Unzip the firmware zip file, you should see the following:
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![Firmware 1.jpg](https://static.wixstatic.com/media/4b933e_ab11e022458d4fa8aa1b365a6dae2d2a~mv2.jpg/v1/fill/w_325,h_144,al_c,q_80,usm_0.66_1.00_0.01,enc_avif,quality_auto/Firmware%201.jpg)
![Firmware 2.jpg](https://static.wixstatic.com/media/4b933e_91907271b9f842dd8941669341667793~mv2.jpg/v1/fill/w_462,h_141,al_c,q_80,usm_0.66_1.00_0.01,enc_avif,quality_auto/Firmware%202.jpg)
Firmware files:
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200309_72320.hex - Firmware for MUSES 72320
202003_2310.hex - Firmware for BB 2310
STEP 4:
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Follow the following instructions carefully.
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DONE!
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It is advisable to test the amp with a pair of cheap loudspeakers. We can't too careful, can we?
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