Speaker ohm ratings on old pa heads
Sun, 12/06/2015 - 15:13
hi Skip
on newer amps I guess it's fairly common to see speaker out ohm ratings of 4, 8 and 16. but on the older pa amp heads I am seeing some of those values like 4 and 8 but often higher ones like 30,60,125 even 500.
are these still in use today or are these obsolete or maybe related to the original use of these heads which were PA purposes and not rocking out?
Andrew
Hello Andrew- Any ohms rating over 16 ohms is of no real use to those using the amp for guitar or harp. They were designed to be used in systems using a large number of speakers in offices, schools etc. In these applications, each individual speaker used it's own "matching transformer".