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Hello everyone, i've been a happy user of C-subs for the last 18 years now; i have contemplated fitting them with different drivers than the PD 1850 they were made for, but i never found anything better to load them with (*).
i saw in the past years some new models of 18" drivers released by precision devices, but nothing that could work (better) in the C-sub IMO.
Until last year, and the release of the PD.185C003: this one seems to match all the T/S parameters of the PD 1850, but with almost twice as much power handling, a bit better VAS, a bit of a lighter cone, better reference efficiency...
Did they finally improve on the PD 1850 ? is this really gonna work as good and even better in a C-sub? will the power compression offset the gain of power handling? (they say 1.6dB power compression @ 800w for the PD1850, but no figure for the PD.185C003 ) will the extra power increase the port air velocity beyond the limit of the design? will the bigger VAS make me go down to F-3 @ 34.5hz instead of 35hz ? will my cat still hide in my c-subs in spite of the reduced chamber volume due to the extra bump on the magnet ?
(*) Note: i made a A/B/C test once with several drivers : one C-sub loaded with PD 1850, one with void v-1000; one with turbomax 1500, all same amp/mike/soundcard settings, same speaker position: the response was as predicted for the PD 1850; a bit less gain on the low resonance with the void, and again less gain in the low resonance with the turbomax: that was in the same order as the VAS figure in the T/S parameters of these drivers. Also, if we look at the X1 and the 184-sub designs, they both go lower than the C-sub, and they both use drivers with a bigger VAS than the PD-1850, so i guess you need the bigger VAS figure to extend the low end. PD.185C003 has slightly improved its VAS upon the PD 1850...
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"If it sounds right, it's right" (Joe Meek)
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