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Member Since 05 Sep 2011
Offline Last Active Feb 22 2015 11:48 AM

Posts I've Made

In Topic: How to program voltage limiter on Xti 4000

22 February 2015 - 11:49 AM

No, unfortunately on the older XTi's there isn't.

You should convert the Watt value that correspond to the operation mode you configured your amp.
At 0dB and at 8 ohm the limiter engages at 650W
At -3dB and at 8 ohm the limiter engages at 375W
At -6dB and at 8 ohm the limiter engages at 187W
At -12dB and at 8 ohm the limiter engages at 47W

Convert the watts to volts and use the correct value you need

In Topic: Using a XTi 1000 to run Subs

21 February 2015 - 01:27 AM

Which subs exactly?

In Topic: Speaker and Amplifier Match

21 February 2015 - 01:25 AM

Dear Henry,
Amp to speaker matching is not just a watts to watts match. I suggest you read this:

So, The short answer is, yes, the 4002 will power them well. The longer answer is that it depends on the kind of music you play (rock, soft music and such), the type of limiters you have lets you push your speakers further with minimal risk for speaker failure, how far you want to push your rig.

The gain knob is for you to tune your rig, it doesn't change or limit the maximum amplifier power whats so ever so learn how to setup your gain structure properly.

In Topic: Crown XTI 4002 & Cerwin Vega CVP 2153

05 February 2015 - 10:10 PM

Hello there,
Your post escaped my eyes...

The software GUI input level meter and the front panel "Signal" Presence LED are before the input level controls and the ADC.
There are input "Clip" indicators in the software GUI above the input level meters that will indicate if the ADC is clipping.
The other two front panel LED level indicators (the -20 and -10) are amplifier output meters indicating the level below full output.
The "Output" Clip GUI software indicator and the front panel "Clip" LED indicate the "amplifier" output is clipping.
There is no indication of Limiting. :)

When you set the limiter this way you get clip protection from the amp but what might be happening is that you are clipping somewhere else in the signal chain. If you don't own an oscilloscope or the RaneGane the only option you have is to connect it to SystemArchitect, BandManager2 or AudioArchitect to see how high is the signal level (That will only tell you the level of the signal, not if it's clipped or not). Are the -20dB and the -10dB LEDs lit?

We use the EQ mainly to fix peaks and dips in the response curves of the speaker, that requires special gear and a set of skills not available the the normal user. That's why there are speaker presets from manufacturers. Ideally they are also used to fix phase and time alignment. So just do it by ear, what sounds good to you.

In Topic: Xti 2 6002 at 2 ohms

04 February 2015 - 11:38 PM

You should never look at the amps damping factor, in itself it is just a useless spec. You should calculate the whole system damping factor. Rules of thumb to make the whole system damping factor go up: I usually avoid configuring the amp to the lowest ohm rating the amp is rated for. The speakers have lower points in their impedance curve that are lower then the rated impedance so the amp is actually seeing less then what it was rated for so if you can, go one level higher in the ohm configuration.

If you plan to push your rig hard, then I would go with the i-Tech line of amps rather then XTis, perhaps only for the subs.