I'll guess that if presented with the same 'scale' of dB they'd be pretty close to each other. It does mean that ripples in the JBL (left) are scaled up as compared to the rippless in the Selenium on the right. The major divisions in the right graph is 20 dB. If I'm reading this correctly: The major divisions in the left graph is 10 dB. The most salient reason for differences in apparent 'smoothness' (visually) is in the left axis of the two graphs and not some other unknowns mentioned above. No smoothing seems likely in these graphs. We can't tell but the graphs of the two both look pretty ragged to me at least in some ranges.

Actually, the more ragged the curve, the less likely you're looking at smoothing. Plane wave tube response is a very accurate and is the only way give a fair measure of the driver itself.Īnother issue is whether the curve has been altered by, typically, 1/3 octave smoothing. The only way to remove the effect of the horn is to run the test on a plane wave tube. Response on JBL 2380A Flat-Front Bi-Radial Horn Frequency response of the 2446J coupled to a JBL 2380A. JBL 2445J with radian diaphragm stereo pair.good work condition. This is a direct replacement for the JBL part number D8R2550 and D8R2451SLH. Other drivers will be considered for equivalency provided that submitted data from a recognized independent test laboratory verify that the above performance specifications are met. 2446H, 2447, 2447H, 2450, 2450H, 2451, 2451H, 2451SLH, 2452, 2452H driver/ horn. Fair enough,but they are likely not identical in effects. The compression driver shall be the JBL Model 2446HJ. Here each manufacturer has used its own horn. We don't have data on the effects of the horns. This may be arguably accurate but the extra effects of the horns mask the actual performance of the driver(s). diaphragms with flexible corrugated surround, phase plugs and powerful magnet struc.

Further, they can goose up on axis response. The top-most graphs show response on the respective horns and the horns typically cause their own ripples. No more searching for peace and quiet to take a call. This sort of data requires some care in interpretation.ĭifferent horns cause different effects.

Jbl 2446h vs radian 950