About: PRV Audio 3MR40-NDY-4 3" 40W RMS Neodymium Midrange Loudspeaker - 4 Ohm 

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. 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.

Product 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!

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: 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 (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

Measurements: 

• 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) 

Note: 

• 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.