About: PRV Audio 4MR60-NDY-4 4" 60W RMS Neodymium Midrange - 4 Ohm (Each) 

The compact 4MR60NDY-4 is a 4″ full range neodymium loudspeaker that can deliver broad frequency coverage and flat midrange response that ensures vocals and instruments to deliver ideal sound to perform well 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 60 watts power handling this driver is capable of remarkable output for its size.

Product Highlights: 

• Nominal Impedance: 4 Ohm
• 60 Watts RMS Music Power Handling, with a 91 dB Sensitivity, capable of generating a lot sound with a small cone!
• Broad 90-20,00 Hz frequency range for ultimate flexibility
• Strong neodymium motor, increases efficiency on a compact design.
• Very low profile loudspeaker, fit it in tight spots easily!

Specifications: 

• Nominal Diameter: 4” (101.6 mm)
• Nominal impedance: 4 Ohms

• Nominal Power Handling: 30 Watts

• Continuous Program Power (RMS): 60 Watts
• Max Peak Power: 120 Watts
• Sensitivity 2.83V at 1m: 91 dB
• Recommended Hi Pass X-Over: 120 Hz (12 dB/Octave)
• Frequency Response: 90 – 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
• Sold Individually 

Thiele-Small Parameters: 

• Equivalent Volume (Vas): 2.85
• Xmax: 1.40 mm
• Free Air Resonance (Fs): 95.6 Hz
• Mechanical Factor (Qms): 4.74
• Electrical Factor (Qes): 1.04
• Total Factor (Qts): 0.85
• Cone Area (Sd): 55.4 cm²
• Mechanical Mass (Mms): 4.17 g
• Bl Factor (Bl): 2.82 Tm
• Dc Resistance (Re): 3.3 Ohms
• Inductance (Le): 0.051 mH at 1 kHz
• Mechanical Mass Without Air (Mmd): 3.93 g
• Mechanical Compliance (Cms): 0.664 mm/N

Mounting and Shipping Information: 

• Overall Diameter: 5.02” (127.5 mm)
• Front Mount Baffle Cutout: 3.64” (92.5 mm)
• Mounting Depth: 1.75” (44.5 mm)
• Overall Depth: 1.95” (50 mm)
• Weight: 0.55 Lbs (0.25 kg)

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.