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ICOM SP-21 Speaker Mod [message #3210] Sun, 06 March 2016 23:45
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Icom SP-21 Speaker Modification
Original SP-21 speaker

Icom SP-21 Speaker Modification
View of backside - no holes

Icom SP-21 Speaker Modification
View inside - simple

Icom SP-21 Speaker Modification
Speaker - 8Ohm, 2w

Icom SP-21 Speaker Modification
Done 8 holes

Icom SP-21 Speaker Modification
Done!! It is now acting like an expensive speaker.

The modification for this standard Icom SP-21 speaker which was bought several days ago is very easy to do.. Steps are as follows :

1) Remove 14 screws
2) Slowly open the cover, factory uses gum for speaker cover
3) Remove 5 screws at speaker cover
4) Slowly remove the insulating material - inside cover
5) Use 1/4mm drill to make 8 holes
6) Reinstall all covers
I have to say, now the speaker sounds like an expensive speaker & no more audio like 'Tong Kosong'.. Now the audio comes out more pleasant & nice to hear.. Good luck & all the best.. 73/88 de 9M2ODY
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