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Sennheiser HD 820 vs Sennheiser HD 660S Comparison

Comparison and Difference Between

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Compare Speakers

Brand and Model Specifications

Information about the brand, model release date.

ManufacturerSennheiserSennheiser
ModelHD 820HD 660S
Photo
Release Date20182017
What Hi-Fi? Rating
-
Amazon Rating
Price

General Specifications

Type, design and features.

Headphone TypeOver-ear (circumaural)Over-ear (circumaural)
Earcup DesignClosed-backOpen-back
Noise OptionsNoneNone
Transducer TechnologyDynamicDynamic
MicrophoneNoNo
ConnectivityWiredWired
Cable Length~3 m
~9.84 ft
~387.5 in
~3 m
~9.84 ft
~387.5 in
Detachable CableYesYes
Battery Life--
Battery Quick Charge--
Water ProtectionNoNo
Inputs6.35 mm, 4.4 mm, XLR-4 (optional)
Controls-No
FoldableNoNo

Technical Specs

Tech specifications of the headphones.

Frequency Response [Hz]12 - 43800 Hz (-3 dB), 6 - 48000 Hz (-10 dB)9 – 41,500
Impedance [Ohms]300150
Maximum Input Power [mW]0.5-
Maximum SPL103104
Distortion-< 0,04%
Driver Diameter56 mm44.1 mm

Dimensions and Weight

Physical characteristics of the speakers (without stands).

Length~7.6 in
~193.04 mm
~19.3 cm
~7.7 in
~195.58 mm
~19.56 cm
Width~7.6 in
~193.04 mm
~19.3 cm
~7.1 in
~180.34 mm
~18.03 cm
Height~4.4 in
~111.76 mm
~11.18 cm
~3.6 in
~91.44 mm
~9.14 cm
Weight~0.8 lb
~362.87 g
~0.36 kg
~0.6 lb
~272.16 g
~0.27 kg

Packaging Info

Package dimensions and weight.

Shipping Length~13.4 in
~340.36 mm
~34.04 cm
~12.6 in
~320.04 mm
~32 cm
Shipping Width~11.4 in
~289.56 mm
~28.96 cm
~10.1 in
~180.34 mm
~18.03 cm
Shipping Height~5.1 in
~129.54 mm
~12.95 cm
~4.2 in
~106.68 mm
~10.67 cm
Shipping Weight~8.38 lb
~3801.1 g
~3.8 kg
~3.4 lb
~1542.21 g
~1.54 kg

Colors and Accessories

List of available colors and optional accessories.

Colors
  • Black
  • Black
Replacable EarpadsYesYes
What's in the Box
  • Sennheiser HD 820 headphones
  • connection cable: ¼” (6.35 mm) stereo jack plug, unbalanced
  • 4.4 mm stereo jack plug, balanced
  • USB flash drive (SD-U16L version) with instruction manual (as PDF file)
  • Instruction manual
  • Storage box
  • Microfiber cloth
  • 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

Disclaimers

Small print and stuff...

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