I work in a club and have a pair of JBL PRX525 and 518 subs. My question is.....When I play some music through the PA at unity, the house left speaker sounds lower than the house right. Before taking the speaker apart, is there a audio program I can run through the house system to determine exactly what speaker might be bad?
I use
Room EQ Wizard to check speaker performance.
Here's what you'll need:
1. The software.
2. A computer.
3. An audio interface (I use a Presonus AudioBox USB)
4. A mic. (I use a dbx RTA mic)
5. The speakers in question (Having two or more is best so you can compare)
6. The cables to hook all this up.
7. Masking tape.
8. A mic stand.
Here's the goal: To see if there is a difference between speakers.
Chances are conditions won't be good to determine "THE" frequency response of the speaker. That's ok. All we want to know is if one speaker is acting differently than the others in a given situation.
Here's what I do:
1. Set the speaker on the floor somewhere.
2. Put masking tape on the floor at the the four corners to make an "L" on the floor at each corner.
3. Set up the mic about 5' in front of the speaker pointed directly at the mid point.
4. Hook up all your cables.
5. Run Room EQ wizard to set levels.
6. Run the Sweep on Room EQ Wizard.
7. Swap out speakers placing the new speaker in the same exact position as the one you just measured. Be careful not to bump the mic.
8. If this is an active speaker, make sure the volume level and switch selectors on the amp are set the same as the one you just measured.
9. Run the REQW Sweep on the new speaker.
10. Look at both plots on one set of axes. Look for differences in response. One may have a dip/rise in frequency that the other does not have meaning a bad crossover... or maybe one has no high end at all meaning a blown driver.
In any case- this method takes all the subjective guesswork out of determining if there is a problem.