ND91-4 3-1/2" Aluminum Cone Full-Range Driver 4 Ohm






FEATURES
  • Low distortion, full-range 65 Hz to 17 kHz performance
  • Rubber-edged black anodized aluminum alloy cone
  • Large excursion capability — 4.6 mm Xmax, 25 mm peak
  • Self-shielded Neo-Balanced motor structure with copper alloy shorting ring
  • 1" 4-layer underhung voice coil with polyimide former
  • 30 watts RMS power handling
  • Great for line arrays and micro monitors

PARAMETERS
Impedance
4 ohms

Re
4.3 ohms

Le
0.83 mH @ 1 kHz

Fs
74 Hz

Qms
4.24

Qes
0.45

Qts
0.41

Mms
4.8g

Cms
0.96 mm/N

Sd
30.4 cm²

Vd
12.2 cm³

BL
4.59 Tm

Vas
1.4 liters

Xmax
4.6mm

VC Diameter
25 mm

SPL
85.6 dB @ 2.83V/1m

RMS Power Handling
30 watts

Usable Frequency Range (Hz)
65 - 17,000 Hz

IMPEDANCE/PHASE




FREQUENCY RESPONSE

Note: 1/24th octave smoothing - nearfield response included in graph below 450 Hz.
Black = 0°
Red = 15°
Green = 30°
Blue = 45°