I use a twelve volt powered Motorola speaker (Black Speaker) without any modifications. It works perfect for my scanners. This is an older picture and I use the amplified speaker on my SDS200 with no issues. Loud, Clear and deep rich tone with my Moto Speaker.
Wrong!I might be wrong, but I don't think it is a transformer at all, rather two capacitors (non polarized?) on each leg. I would be wary.
Thanks, kruser!I found a pair of transformers instead.
No other components at all other than the two jacks.