Did you give the speaker 12 volt external power? It will not work if it isn't given power. An amplified speaker boosts (amplifies) the power to the speaker so it will have more volume for loud environments. The 436 will work better with an amplified speaker, where the 536 will work fine with either type.Thank you. I tried the speaker on both the 436 and 536 and it didn't work. I sent it back. Hoping I will get a good replacement.
In addition to requiring 12vdc power, the BC23A has a power switch/volume control on the speaker. On the 436, I would set the volume at maximum on the speaker and set the volume where necessary on the scanner. You can lower the volume control on the speaker if you hear distortion. On the 536, you can set the volume of the speaker to give you a good range of the volume control on the scanner. If you hear distortion, lower the speaker volume control. You must have the volume turned up on both the scanner and speaker for it to work.Thank you. I tried the speaker on both the 436 and 536 and it didn't work. I sent it back. Hoping I will get a good replacement.