I have a BCD436HP I have bought two diffrent types of external speakers trying to increase the volume when a vehicle. The last one was a 20watt Uniden. When I plug into the jack it actually decreases the volume considerably . Any help appreciated !!
Worth remembering that power ratings on loudspeakers determine the maximum power they can handle, so if you plugged the radio into my 8 X 10" bass guitar cabinet, it can handle an awful lot of Watts, and takes a lot of them to even wobble the speaker cones - so a big speaker usually produces less volume - this is normal.
I have tested my Canz 808 amplified speaker on my 436HP and 325P2 and it has not hiss or problems.
Either something is different with the HP1 or my HP1 has a problem. I only have 1 HP1 so I cannot compare it. Again, the hiss is the same level regardless of the volume setting on the HP1, even with the volume fully turned down.
Looking for anyone with a HP1 they have testes with an external amplified speaker.