Markaudio CHR-70 Silver 4" Full Range Aluminium Woofer

Price for 1 piece

The MarkAudio CHR-70 has a light easy sound, a little warm, not so "shaped" so it will suit the listening tastes of many people. Its cone gives much musical detail and makes a very clear sound.

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Highlights

The latest model, 3rd generation

Synthetic rubber surround

Nomex spider

Improved voice coil former

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Product details

Markaudio CHR-70 Silver 4" Full Range Aluminium Woofer 

The CHR-70 (Gen. 3) is now up-dated 3 times since the first model was launched nearly 3 years back. This Gen. 3 driver has more high range performance. The frequency range now goes higher to 25-kHz. Bass response in the properly designed box can go low to just under 40Hz. It has a light easy sound, a little warm, not so "shaped" so it will suit the listening tastes of many people. Its cone gives much musical detail and makes a very clear sound. The driver has a medium efficiency of 85.5 dB at 8 Ohms making it easy to use on nearly all small to medium power amplifiers. The driver can easily fit into Bass-reflex and Vented box sizes from 4.4 liters to 10 liters internal volume. Many technical improvements have been made. Improved stiffer frame. New cap design with a new improved fitting method. New Japanese designed coil. New spider for improved bass. The new CHR-70 Gen. 3 is an excellent high-end and multi-purpose driver. Its also suitable for many computers, Home Theatre, TV, and commercial A/V applications.

11 cm full range driver with metal cone. . The rubber surround is invers. The speaker has soldering lugs / faston terminals.

• power handling (continuous/programme) = 20 W
• frequency range = 60-30000 Hz
• resonance frequency fs = 65,4 Hz
• impedance R = 8 Ohm
• sound pressure level SPL = 85,4 dB (2,83V; 1m)
• DC resistance Re = 7,2 Ohm
• force factor BL = 4,2 N/A
• voice coil inductance L = 0,032 mH
• effective piston radiating area Sd = 50,2 cm²
• effective mechanical mass incl. air load mms = 4,1 g
• equivalent volume of compliance Vas = 5,17 l
• total Q factor Qts = 0,55 (Qms=2,66, Qes=0,69)
• voice coil diameter = 20 mm
• maximum peak linear excursion vibration x_lin = +/- 4,3 mm
• mounting diameter d = 102 mm
• overall diameter d = 124 mm
• mounting depth (not countersunk) t = 56 mm

recommended cabinet 1:
closed cabinet with 3,7 L volume
from 96/61 Hz (-3dB/-8dB)
 
recommended cabinet 2:
15 L volume bass reflex cabinet
with HP50 reflex tube, 11 cm long.
from 43/37 Hz (-3dB/-8dB).