yes, your radio likely doesn't have enough output to drive the speaker, which will be designed for much more volume - although it could also be a mismatch in impedence, check the resistance value of it compared to the regular speaker for the radio

Bill


Moved over to the Passing Lane

"When we tug a single thing in nature we find it attached to the rest of the world" John Muir
"When we tug a single thing on an old truck, we find it falls off" me
Some TF series details & TF heater pics & Rust-a-holics Unanimous parking lot