The compact 3MR40NDY-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.
Technical Details
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
*Nominal power handling is defined as the maximum RMS power that the speaker can handle in a 2-hour test with a pink noise with 6dB of crest factor and a bandpass filter with 12db/oct tuned in its usable frequency range. **Continuous Program Power (RMS) is the maximum power that the speaker can handle considering a regular musical program using our recommended filters, this power can be used to define the optimum amplifier power to avoid a clean signal without clipping or saturation. ***Max Peak Power is the maximum power operation for the speaker, this power is allowed just for a few fractions of a second, usually found just on the peaks of the music. Keeping this power for a little longer timer will damage the speaker.
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
***Xmax=(Voice coil winding depth-Magnetic Gap depth)/2+ Magnetic Gap Depth/4