The compact 3MR40-NDY-4 is a 3″ full range loudspeaker designed to perform in portable speaker systems, line arrays, or even car audio applications where weight and space limitations comes as a major factor in the project. With 91 dB efficiency and 40 watts power handling this driver is capable of remarkable output for its size.

Highlights

• Nominal Impedance: 4 Ohm
• 40 Watts RMS Music Power Handling, with a 91 dB Sensitivity, capable of generating a lot sound with a small cone!
• Voice Coil Diameter: 0.75″
• Strong neodymium motor, increases efficiency on a compact design.
• Very low profile loudspeaker, fit it in tight spots easily!

Super well balanced frequency response from 120 to 20,000Hz, making this a MR. Do-It-All with high fidelity sound as a midbass, midrange or full-range speaker.

GENERAL SPECIFICATIONS

Nominal Diameter	3” (76.2 mm)
Nominal impedance	4 Ohm
Nominal Power Handling*	20 Watts
Continuous Program Power (RMS)**	40 Watts
Max Peak Power***	80 Watts
Sensitivity 2.00V at 1m	91 dB
Recommended Hi Pass Crossover For Full Power Handling	160Hz 12db Per Octave Crossover
Frequency Response	120 – 20,000 Hz
Voice Coil Diameter	0.75” (19 mm)
Voice Coil Wire	CCAW
Voice Coil Winding Depth	4.8 mm
Former Material	Polyimide
Magnetic Gap Depth	4 mm
Frame Material	Stamped Steel

THIELE-SMALL PARAMETERS

Equivalent Volume	Vas	0.63 l
Excursion (mathematical)***	Xmax	1.40 mm
Free Air Resonance	Fs	153.2 Hz
Mechanical Factor	Qms	3.41
Electrical Factor	Qes	0.99
Total Factor	Qts	0.77
Cone Area	Sd	33.2 cm²
Mechanical Mass	Mms	2.62 g
Bl Factor	Bl	2.93 Tm
Dc Resistance	Re	3.4 Ohms
Inductance	Le	0.01 mH at 1 kHz
Mechanical Mass Without Air	Mmd	2.51 g
Mechanical Compliance	Cms	0.443 mm/N

EXTRA INFO

Overall Diameter	3.69” (93.7 mm)
Front Mount Baffle Cutout	2.79” (71 mm)
Mounting Depth	1.59” (40.5 mm)
Overall Depth	1.83” (46.5 mm)
Net Weight	0.51 Lb (0.23 kg)
Shipping Weight	0.55 Lb (0.25 kg)
Carton Dimensions W x L x H	4.09” x 3.54” x 2.0” (104 x 90 x 51 mm)