Post by JohnG on Feb 13, 2009 7:47:11 GMT
Hi Jacqui,
The other thing you may be able to do Jacqui is hire the speakers for a short while. You are more likely to find better quality, like the RCF ones, in PA hire shops than the cheapies.
The shop assistant could be right about active vs. passive. There are likely to be 2 amps in the actives, one for high the other for low frequencies. An active crossover, the bit that splits the highs from the lows, tends to be very much more accurate, and you can tailor the output from an internal amp electrically, to match the loudspeaker much more accurately too.
Loudspeakers are not very accurate things generally and vibrations generated by the audio signal tend to make the cone break up into all sorts of strange resonances. This causes variations in level at different frequencies. An active amp can have its response tailored to combat this. NB can have doesn't mean does have.
Did you know that loudspeakers are only about 1 to 2 % efficient in converting the electrical energy into acoustic energy? So 98% or more is lost in heat! After a gig try whipping the back off the box and touching the magnet. Be careful, don't burn yourself!
All the best,
JohnG.
The other thing you may be able to do Jacqui is hire the speakers for a short while. You are more likely to find better quality, like the RCF ones, in PA hire shops than the cheapies.
The shop assistant could be right about active vs. passive. There are likely to be 2 amps in the actives, one for high the other for low frequencies. An active crossover, the bit that splits the highs from the lows, tends to be very much more accurate, and you can tailor the output from an internal amp electrically, to match the loudspeaker much more accurately too.
Loudspeakers are not very accurate things generally and vibrations generated by the audio signal tend to make the cone break up into all sorts of strange resonances. This causes variations in level at different frequencies. An active amp can have its response tailored to combat this. NB can have doesn't mean does have.
Did you know that loudspeakers are only about 1 to 2 % efficient in converting the electrical energy into acoustic energy? So 98% or more is lost in heat! After a gig try whipping the back off the box and touching the magnet. Be careful, don't burn yourself!
All the best,
JohnG.