Markaudio CHP-70 Black 4" Full Range Paper Woofer

Price for 1 piece

Product description

The MarkAudio CHP-70 driver is designed to make a semi-vintage classic sound similar to the smaller full range driver designs from the 1950ʼs. Its middle-high range output has been made to "roll-off" from 7-kHz up.

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Highlights

Synthetic rubber surround

Nomex spider

Improved voice coil former

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Product details

Markaudio CHP-70 Black 4" Full Range Paper Woofer Natural

This updated (Gen. 2) CHP-70 driver is designed to make a semi-vintage classic sound similar to the smaller full-range driver designs from the 1950ʼs. Its middle-high range output has been made to "roll-off" from 7-kHz up. This helps to keep the high range sounding smooth and warm. This driver makes the singer's voice sound very natural, a little warm, pleasing for many hours of listening.

The CHP-70 Gen. 2 will assist in the control of sharp or hard sounding compressed music (digital). This CHP delivers a tone that appeals to classic music enthusiasts using smaller amplifiers. The off-axis and sound-spread of the CHP-70 are excellent. This driver can fill a room environment with an "easy listening" experience, especially for the human voice. The bass response from the CHP-70 Gen. 2 in a properly tuned box is excellent for this smaller sized driver. Typically, in a Bass-Reflex or Vented box, lower responses close to 40Hz can be obtained.

Several technical improvements have been done, such as 1 - Improved stiffer frame. 2 - New cap design with the new improved fitting method. 3 - New Japanese designed coil. 4 - New spider for improved bass. The CHP-70 Gen. 2 is an excellent "classic" and "natural" sound driver. The CHP-70 Excursion Arrestor will make a sound when exceeding the driver’s excursion limits.

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Specifications

• Article number CHP-70 Black
• Woofer Series CH Series
• Woofer Type Full-range
• Nominal Diameter 4"
• Power Handling (RMS) 20 Watts
• Impedance (Z) 8 ohms
• Sensitivity 86.5 dB 2.83V/1m
• Voice Coil Diameter 0.78"
• DC Resistance (Re) 7.2 ohms
• Resonant Frequency (Fs) 50.2 Hz
• Mechanical Q (Qms) 2.3
• Electromagnetic Q (Qes) 0.76
• Total Q (Qts) 0.52
• Diaphragm Mass Inc. Airload (Mms) 3.7g
• Mechanical Compliance of Suspension (Cms) 1.31 mm/N
• Surface Area of Cone (Sd) 50.2 cm²
• BL Product (BL) 4.2 Tm
• Compliance Equivalent Volume (Vas) 0.16 ft.³
• Maximum Linear Excursion (Xmax) 4 mm
• Cone / Diaphragm Material Paper
• Overall Outside Diameter 4.88"
• Overall Depth 2.2"
• Baffle Cutout Diameter 4.41"
• # Mounting Holes 4