XTI 1002 questions
Posted 20 August 2012 - 12:37 AM
I am currently using the following components for DJ use:
2 B-52 PA315
2 Crown XTI 1002 ( one amp for right one amp for left bridged at 8 ohms. in bridged mode, with Y input seleced, amp A ch 1 gets left signal amp B ch 1 gets right signal )
1 DriveRack PA+
1 furman AR-1215 AC LINE VOLTAGE REGULATOR that everything is plugged into ( which i now think is useless )( including a labtop and a cheap alto 5 ch mixer ) ( which i now think is useless )
I just started messing around with the Band Manager 2 and i noticed that my inputs were next to clipping but my outputs were nowhere near clipping ( more like 1/4 of the way up the meter max ). so after beating the internet to death with google and finding the corrolation with the gain knobs on the front of the amp now the output is a bar or two under the input and no clipping. even tho the knobs on the amp are 3 and 4 clicks away from being at 100%... is this a correct and or safe way to do this? also by doing that, i started to notice a hiss... so i started by unpluging the inputs and the hiss was still present.. i have only had these amps for 3 days and the clip lights have only " bliped " while setting gain structure the first time ( which produced the insane inputs with the low outputs ) and the second time i did a redo on the gain structure to use more amp power. my reading im afriad to get the answer about the hiss.. i would like a dead silent system with nothing playing but if its not hurting anything when music is being played then i will not worry about it. i also have a B-52 PA18s otw that will be powered by an XTI 2002 bridged at 8ohms.. i was told to go for the 6002 and the 4002 but i didnt have the money or the 20 Amp socket ( how many places have 20A circuits? ) while on the subject of amps and outlets and voltage... that furman AR... is that suposto keep whatever is plugged into it with a constant supply of 120 volts? when i was testing my system today while looking at the voltages in Band Manager they were dropping to around 110 or so.. so whats the voltage regulator even doing? did i waste my money on it? or can somebody suggest something better...
Posted 20 August 2012 - 12:43 AM
Posted 20 August 2012 - 07:35 AM
First you need to learn about proper gain structure, here is a YouTube link:
Many more video tutorials about that. It should get you started on the right path.
About the hiss problem, there are so many places it can come from, but since you're getting it from two or four brand new amps, I would suggest the amps are not the source for the hiss. I would start with one amp connected directly to the grid and one speaker, NO furman, no mixer, no nothing, Just one amp, turn the gain down all the way, turn the amp on, then turn it up all the way to 100%, see if you still get the hiss problem, now turn the gain knob all the way down again and turn off the amp. If you get the hiss problem with all the amps then we'll see what's next.
Now for the Furman regulator... I don't have actual experiance with these units but the manual saies it gives 15A of output at 124V, you need 10A for each of the XTIs so just using simple logic, you're overloading it. This could be the reason for the voltage drop if you really push it. A call to their tech support would be the wizest thing to do. This is their phone number:
Toll Free Phone 1.877.486.4738
Its still tall free from outside the US using skype.
Now for the dimming lights problem... You're seriosly under powerd to run the whole rig on the circuit powering it, you need to change the wires of this circuit to higher guage wires all the way to the breaker and purhaps use a higher capacity circuit breaker.
Yap, you posted on the wrong forum
You have some work to do so let me know if you need more help...
Posted 20 August 2012 - 01:34 PM
Posted 21 August 2012 - 03:21 PM