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I'm going to say an earlier model D130 based on the magnet pot shape and finish.

I'm going to say no on compromising the signal.

Properly set up a DSP crossover can "fine tune" a speaker system in ways an analog crossover can never do such as driver time alignment, phase...

Knock off connectors will come back and bite you every time.
All of my speaker connections and speaker cables are all Neutrik and that is a lot of connectors

Even the Switchcraft and Amphenol...

I know this post is getting old but the DSi series amps were/are basically the same as the original XTi and CDi series amps only loaded with presets for the JBL movie theater series speakers.

The...

From what I remember on the JBL 2301's I had you could call it a random alignment.

I almost want to say Fostex, or its just a faded aftermarket recone.

I'm going to feel the hit, 17 of my wireless mic systems are all in the 600mhz bandwidth, that's just about half of my wireless inventory!

When the 700mhz sell off happened about 10 years ago I...

Regardless of the amp choice you may want to consider a DC blocking cap in series with the 2405. Something like a 6uf would put the cap cutoff well below the where your most likely crossing into the...

I have one of the Allen Heath Qu-Pac32 rack digital mixers and the AR2412 expansion stage box.

Enjoy your new mixer!

I'm curious as to what you have in the Midas box!

Some peoples concept of proper packing amazes me!

Can you hear any loose parts inside falling around when you shake the amp?
It could be a loose screw stuck somewhere it shouldn't be, a dead rail...

In case you have not heard Crown has all but pulled out of their original Elkhart, Indiana location and moved most of the production and service operation to Mexico with a customer service center...

Thanks for the picture, I always like early concert production pictures and info.
What work did you for the Scorpions?

If the diaphragm has ever been changed you may want to double check the lead connections to the diaphragm making sure they are correct. On the diaphragm the + connection (red wire) is the one with...

As mentioned run three per channel with the amp in stereo.
How many ohms are your subs rate at.

The impedance rating / ohms of a speaker is is kind of an average number, the impedance / ohms...

I just looked that mixer up and that would do it, just pick a pair of the line inputs to use for the lap tops input. You want to use a cable that breaks out a 1/8 tip ring sleeve head phone plug at...

That helps narrow it down.
Now try it with the 360 connected to the amp but with nothing connected to the inputs on the 360 and see what you get.

The 60hz hum may be nulled out when the amp is...

Try it with the amp completely disconnected from any input source.

What type of unit is the input source, a balanced connection from your input source's output to the amp's input is the best way...

Do you get the noise with out any inputs connected to the amp?

For what it's worth when I got one 360 to try out one of things I wanted to see was how it sounded when being driven into clip on the inputs and outputs (not that I run my systems like that!!!)...

As for the new JBL diaphragms, about a month ago I went to replace a diaphragm in one of my 2426 drivers with a new JBL replacement that had been on my parts shelf for about a year. First it would...

Sorry, can't help much there, I have never had the chance to use a DBX 4820.

Try sweeping the system with sine wave tone, single frequency tone can be very useful in finding buzzes and distortion.

Connect the headphones directly to a speaker lead ( at a lower volume) put...

Some of the utility set functions are only available on the unit it self. All of the audio control functions are available on the app, nothing can beat walking around and adjusting the system with an...

Just for the sake of testing do you have another speaker you could swap out to do an A B test with. Do you hear what your hearing at all volume levels. Maybe try listening with headphones.