You're right, my bad. I was thinking rising as we go deeper, but I guess the standard is to go from left to right...What you describe as "the upwards sloping curve" is a downwards slope with rising frequency as preferred by most listeners.
The XTI 1002 is rated for 700W at 2Ohm and 275 at 8 Ohm. I could of course run it bridged, but I'm planning to connect another sub to the other channel. I would presume that if the load is too much, it would start getting warm and the fan would spool up? So far, the fan hasn't even started running when testing and it feels warm to the touch, but not hot.A 2-ohm load will draw a lot of current from the amplifier, and for long-term use, I'm not sure how robust that configuration will be. If your Crown amplifier is a stereo unit, I think you'd be better off driving the two coils independently, one coil per channel of the Crown.
Thanks, you're right. The HP in my Crown can't be set lower than 20 Hz though.When using the system tuned for maximum passband flatness, if you dropped the cut-off frequency of the 4th-order high-pass Butterworth filter from 20Hz down to 18Hz, you would be able to eke out an extra 1–2Hz of bass extension. This wouldn't significantly change the maximum excursion of that configuration.
I don't quite get this. From the formula for calculating QES, it seems to me that the changes in variables when going from parallel to serial connection should cancel each other out, so QES should stay the same?I think that means that the Qes of the driver in this voice coil configuration is 1/2 that which was provided in the datasheet.
@nPers You're 100% correct. Thanks for pointing that out.
Qes stays the same irrespective of whether a parallel or series connection is used. Changing from series to parallel reduces Re by a factor of 4, while BL is reduced by a factor of 2. As BL appears as a squared term in the formula for Qes, the two effects cancel each other out. The parallel connection results in a 6dB increase in voltage sensitivity. Apologies for my initial confusion with all of this.
Qes stays the same irrespective of whether a parallel or series connection is used. Changing from series to parallel reduces Re by a factor of 4, while BL is reduced by a factor of 2. As BL appears as a squared term in the formula for Qes, the two effects cancel each other out. The parallel connection results in a 6dB increase in voltage sensitivity. Apologies for my initial confusion with all of this.
No worries, you've been incredibly helpful to me with your simulations and insights. I'm contributing to the confusion myself most of all I think... 😀Qes stays the same irrespective of whether a parallel or series connection is used. Changing from series to parallel reduces Re by a factor of 4, while BL is reduced by a factor of 2. As BL appears as a squared term in the formula for Qes, the two effects cancel each other out. The parallel connection results in a 6dB increase in voltage sensitivity. Apologies for my initial confusion with all of this.