Few readers asked me to comment about the recent article posted by James's blog and Pak Hen's blog regarding the external tweeters installation at the entrance.
For me, I never thing so far...My reason is very simple when I installed my own external tweeters at my Roving and Nesting entrance.
1. I use good tweeters that can cover freq range from 1Kz to 16kHz
2. I use min 4 tweeters to make sure the sound is loud and clear.
3. I use good external sound to pull the birds into my BH. Not just playing at the "Magic 4".
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