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Sennheiser CX 100 vs Sennheiser HD 660S Comparison

Comparison and Difference Between

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Brand and Model Specifications

Information about the brand, model release date.

ModelCX 100HD 660S
Release Date20192017
What Hi-Fi? Rating - -
Amazon Rating

General Specifications

Type, design and features.

Headphone TypeIn-ear (earbuds)Over-ear (circumaural)
Earcup Designn/aOpen-back
Noise OptionsNoise-isolatingNone
Transducer TechnologyDynamicDynamic
Cable Length~1.2 m
~3.94 ft
~155 in
~3 m
~9.84 ft
~387.5 in
Detachable CableNoYes
Battery Life--
Battery Quick Charge--
Water ProtectionNoNo
Inputs3.5 mm

Technical Specs

Tech specifications of the headphones.

Frequency Response [Hz]17 - 20,0009 – 41,500
Impedance [Ohms]28150
Maximum Input Power [mW]--
Maximum SPL119104
Distortion<0.5%< 0,04%
Driver Diameter-44.1 mm

Dimensions and Weight

Physical characteristics of the speakers (without stands).

Length~0.5 in
~12.7 mm
~1.27 cm
~7.7 in
~195.58 mm
~19.56 cm
Width~0.5 in
~12.7 mm
~1.27 cm
~7.1 in
~180.34 mm
~18.03 cm
Height~0.5 in
~12.7 mm
~1.27 cm
~3.6 in
~91.44 mm
~9.14 cm
Weight~0.02 lb
~9.07 g
~0.01 kg
~0.6 lb
~272.16 g
~0.27 kg

Packaging Info

Package dimensions and weight.

Shipping Length~9.2 in
~233.68 mm
~23.37 cm
~12.6 in
~320.04 mm
~32 cm
Shipping Width~7.5 in
~190.5 mm
~19.05 cm
~10.1 in
~180.34 mm
~18.03 cm
Shipping Height~5.8 in
~147.32 mm
~14.73 cm
~4.2 in
~106.68 mm
~10.67 cm
Shipping Weight~0.2 lb
~90.72 g
~0.09 kg
~3.4 lb
~1542.21 g
~1.54 kg

Colors and Accessories

List of available colors and optional accessories.

  • Black
  • White
  • Black
Replacable EarpadsYesYes
What's in the Box
  • Sennheiser CX 100 earphones
  • Ear adapter set XS/S/M/L
  • User Manual
  • Sennheiser HD 660 S
  • Cable with 6.35 mm Plug
  • Cable with 4.4 mm Pentaconn Plug (balanced)
  • Adapter 6.35 to 3.5 mm
  • Manual
  • Storage Box

Price and Warranty

Satisfaction is (not) guaranteed.

Warranty2 Years2 Years
Amazon Price


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