Subwoofers JBL W12GTI

Sdx12

Parameters

  • Fs 21.3 hz
  • Senstitivity 87.2 @ 2.83V/1M
  • Mms 275.9 g
  • BL 18.4 N/A
  • Cms 0.276 mm/N
  • Vas 67.5 L
  • Qms 3.962
  • Qes 0.414
  • Qts 0.374
  • Nom Imp 4 ohm
  • Re 3.7 ohm
  • Le 1.38 mH
  • Xmax 28 MM
  • Sd 491 cm^2

JBL w12

VOICE COIL DC RESISTANCE: REVC (OHMS)* . . . . . 3.20
VOICE COIL INDUCTANCE @ 1 KHZ: LEVC (MH)* . . . . . . 0.75
DRIVER RADIATING AREA: SD (FT2) . . . . . . . . 0.516
SD (M2) . . . . . . . . 0.048
MOTOR FORCE FACTOR: BL (TM)* . . . . . . . 14.64
COMPLIANCE VOLUME: VAS (FT3) . . . . . . . . 1.58
VAS (LITERS) . . . . . 44.75
SUSPENSION COMPLIANCE: CMS (µM/N) . . . . 135.28
MOVING MASS, AIR LOAD: MMS (GRAMS). . . . 184.80
MOVING MASS, DIAPHRAGM: MMD (GRAMS) . . . 178.72
FREE-AIR RESONANCE: FS (HZ) . . . . . . . . 31.83
MECHANICAL Q: QMS . . . . . . . . . . . 6.68
ELECTRICAL Q: QES . . . . . . . . . . . . 0.55
TOTAL Q: QTS . . . . . . . . . . . . 0.51
MAGNETIC-GAP HEIGHT: HAG (IN) . . . . . . . . . 1.00
HAG (MM) . . . . . . . 25.40
VOICE-COIL HEIGHT: HVC (IN) . . . . . . . . . 2.60
HVC (MM) . . . . . . . 66.04
MAXIMUM EXCURSION: XMAX (IN) . . . . . . . .0.80
(ONE-WAY LINEAR) XMAX (MM) . . . . . . 20.32


So yes they are different but not that much I think, they both want to achieve low distortion, high excursion and I think xbl and ddd are a bit the same right?

JBL w12 is only available second hand.

I wonder if I should get a used w12 or a new sdx12 for a sealed woofer that would be used with a very low cutoff frequency