saturday i go on river and i must compare my 2 towfish
the thirst one mounted with original humminbird transducer with his 6 m original cable
the second in carbon with tranducer and 60 m leng of cable
and what ?
the second is working well in 455 khz, and lose a very litle part in 800 khz
but i can't compare in 800 because i don't take the same scale
in 455 yes