sebackman
01-26-2011, 04:24 AM
Dear all,
Is there anyone who may have measurement curves for the 2382a horn together with the 2450H (or J) driver. I seem to get a nasty resonance at 15kHz. Please see attached MLS measurement.
Don’t really know why. It is the same for both left and right speaker. It is a far field measurement at 63cm, XO is LR @ 1,2 kHz and the mic is front center. Mic is a calibrated M30 so that is not the problem and the time window is only 3ms so there should be no reflections distorting.
Can it be that this combination does not work well? The curve looks pretty much like the referens curve in the 2450 spec sheet when mounted on plane-wave terminated tube! The shifts are extra visible due to the scale.
Also does anyone have a setting for an electronic (digital) filter for this combination. I have searched the Internet and most of the JBL websites for a setting but without luck. There should have been someone using this combination with the DCS280 or similar. I have not found any settings for 2382 and 2446 either.
All input appreciated
Best regards
RoB
Is there anyone who may have measurement curves for the 2382a horn together with the 2450H (or J) driver. I seem to get a nasty resonance at 15kHz. Please see attached MLS measurement.
Don’t really know why. It is the same for both left and right speaker. It is a far field measurement at 63cm, XO is LR @ 1,2 kHz and the mic is front center. Mic is a calibrated M30 so that is not the problem and the time window is only 3ms so there should be no reflections distorting.
Can it be that this combination does not work well? The curve looks pretty much like the referens curve in the 2450 spec sheet when mounted on plane-wave terminated tube! The shifts are extra visible due to the scale.
Also does anyone have a setting for an electronic (digital) filter for this combination. I have searched the Internet and most of the JBL websites for a setting but without luck. There should have been someone using this combination with the DCS280 or similar. I have not found any settings for 2382 and 2446 either.
All input appreciated
Best regards
RoB