5 Attachment(s)
"Next Generation" - A different animal?
Per request, impedance, phase, and response plots for 2 units 2452H-SL, on PT-H95HF waveguides. Frequency response is shown at both 10 and 5 dB/division. Raw FR plots unsmoothed, filtered ones 1/6 octave.
I'm not seeing any breakup mode here, unless it's at 10 kHz; I doubt the waveguides are masking it.
The two units are not perfectly matched. Don't know if I'm going to do anything about that, tho, at this point....
Sorry 'bout the wide impedance/phase plots. I want to show max resolution for TimG's analysis.
VP7215/95 frequency response, bottom. Same driver and horn, filter/EQ unknown.
Looks like #2 (blue) is the "good" one from that; I doubt they EQ above 10 kHz.
[Measure your drivers, folks, even (especially) the $1315 ones.... :yes: ]
4 Attachment(s)
2452H-SL on JBL 2352 Horn
Horn flange is drilled to accept this bolt pattern, same as 243x drivers.
1) Impedance and phase.
2) Frequency Response of driver alone, with compensation, and full range with 2235H in 4507, two ports closed.
3) Comparison with 2435HPL. 2452H-SL requires 10 dB less "push" at 20 kHz; no more than at 10 kHz, apparently.
4) Published FR of 2451 on 2352. "-SL" version upublished, and I don't have one. :(