Troubleshooting loss of mid-range on commercial audio setup.

[Plafcan25]

The taproom I work out lost all mid-range audio after a loud spike in volume recently. When the subwoofer is disabled, we only get the very high notes in the other speakers. The coincidence of the mid range failing during an audio spike is perplexing. By no means am I savy in the realm of audio equipment, but I do have a feeling they were connected. I don’t believe any equipment I’m working with has a fuse, and we also performed a reset on the amp, to no avail. These are the specs with what we’re working with:

-Denon DN-X500 mixer
-Behringer ultra graph pro equalizer
-Crown XLS2500 amplifier

Again, please excuse my naïveté, but I’m trying to troubleshoot best I can before we pay someone to come in. Im wondering if we may have damaged that range somehow, and if there might be a way a layman like myself could check to see? Is there anyway that the mixer could be damaged, or would it more likely be the amp, like I suspect? Again, the reset “breaker” on the amp was fine.

Any thoughts/direction are appreciated!

 

[BMXTRIX]

The first thing I would do in testing is connect a source (your phone) directly to the amplifier with the audio turned down to see how things sound. Analog mixers go bad all the time and that is the most likely culprit.

The equalizer could be the culprit as well, but relatively speaking, those two items are easily replaced. The amp is a solid piece, and the speakers likely are as well. I'm not sure how many speakers you have connected to the amp, or what type they are, but I'm just thinking that you want to check those two items out first, then start working up the food chain.

The amp has RCA connections on it, so any source with RCA outputs will work fine, but a phone is one of the better east test units because you have a volume control on your phone and won't be cranking the speakers too loud. Pick up 1/8" mini stereo to RCA adapter cable for your phone if you don't own one already. Amazon has them as should places like Walmart or Target.

 

[Plafcan25]

Excellent advice, and thank you.

I plugged my phone directly to the amp, and i am still missing the mid range. I also turned off the equalizer while doing it and still the same. So, I can safely presume it is the amp, yeah?

Trying to figure out the next step...would it be possible there is a fuse that may have blown? Again, the “reset” breaker in the back was not engaged, but I’m still not convinced there isn’t something that couldn’t be easily replaced.

Curious if anyone might be able to point me in the next step or two? At the very least, at least we know which hardware is wack.

 

[TLS Guy]

Excellent advice, and thank you.

I plugged my phone directly to the amp, and i am still missing the mid range. I also turned off the equalizer while doing it and still the same. So, I can safely presume it is the amp, yeah?

Trying to figure out the next step...would it be possible there is a fuse that may have blown? Again, the “reset” breaker in the back was not engaged, but I’m still not convinced there isn’t something that couldn’t be easily replaced.

Curious if anyone might be able to point me in the next step or two? At the very least, at least we know which hardware is wack.

This is very unlikely to be the amp. Never come across an amp fail that way. It is most likely the speakers. What are the speaker and are they 2 way or three way?

 

[Plafcan25]

I believe they are two-way. We have 8 of them. Do you think it’s possible they all blew? We definitely don’t get an mid from any 8 of them.

 

[Plafcan25]

Also, I have no idea on the model, but they are these, Yamahas.

 

[TLS Guy]

Also, I have no idea on the model, but they are these, Yamahas.

That is certainly possible. They are small speakers and would blow easily with a quick power burst.

If you don't have test equipment then connect the amp to known good speakers, and connect the speakers to a known good amp. That will tell you where the problem is.

 

[Plafcan25]

Thank you!

 

[B SUBASCHANDRA BOS]

Most likely your speakers are blown.
Yes all eight of them from the spike.
Try to get a speaker different from the setup and test it.


Sent from my iPhone using Tapatalk

 

[Kvn_Walker]

What was the "spike"? Did someone not check the volume before turning it on? Were cables disconnected while the system was on? Or was someone jamming and it got "turned to 11"? An XLS2500 will send 440 watts into 8 ohms so the woofers in those Yamahas are most likely cooked.

 

[highfigh]

The taproom I work out lost all mid-range audio after a loud spike in volume recently. When the subwoofer is disabled, we only get the very high notes in the other speakers. The coincidence of the mid range failing during an audio spike is perplexing. By no means am I savy in the realm of audio equipment, but I do have a feeling they were connected. I don’t believe any equipment I’m working with has a fuse, and we also performed a reset on the amp, to no avail. These are the specs with what we’re working with:

-Denon DN-X500 mixer
-Behringer ultra graph pro equalizer
-Crown XLS2500 amplifier

Again, please excuse my naïveté, but I’m trying to troubleshoot best I can before we pay someone to come in. Im wondering if we may have damaged that range somehow, and if there might be a way a layman like myself could check to see? Is there anyway that the mixer could be damaged, or would it more likely be the amp, like I suspect? Again, the reset “breaker” on the amp was fine.

Any thoughts/direction are appreciated!

Post a photo and the actual model of the equalizer- I would bet that the range that's boosted is exactly where the Yamaha speakers DON'T need it to be boosted and if you (or the installer) read the manual, you'll see that some models, like the 1502, don't have a high pass crossover, they just have a low pass for the sub out, a Low Pass frequency control on the back and a Subwoofer level control on the front.

If the equalizer is the 1502, look online for a crossover- there are many ways to do this and the least expensive one I have seen is from Harrison Research, who make a product called 'F-Mod'. These are available with many crossover frequencies, but not variable. Choose something around 80Hz High Pass and make sure that whomever sets the equalizer A) knows how to do it correctly and B) nobody else can mess with it.

http://www.hlabs.com/products/crossovers/index_files/Page395.htm

 

[Kvn_Walker]

Crown XLS amps also have a settable electronic crossover. It's too late for the current speakers, but he can read how to set hi-pass to protect the next ones.

 

[mtrycrafts]

How are those speakers connected to the amp? Series and parallel? One or the other?
Impedance of the speakers?

 

[Plafcan25]

Thanks for all of the replies. We found out all of the 8 speakers are blown. The spike was during an audio-round during trivia. It was just too loud, because it was busy.

Again, thanks everyone for all of your responses!

 

[TLS Guy]

Thanks for all of the replies. We found out all of the 8 speakers are blown. The spike was during an audio-round during trivia. It was just too loud, because it was busy.

Again, thanks everyone for all of your responses!

Thanks for the follow up.

For your application those speakers are far too small. You need much more robust gear.