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Sennheiser HD 660S vs Sennheiser HD 820 Comparison

Comparison and Difference Between

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Brand and Model Specifications

Information about the brand, model release date.

Manufacturer Sennheiser Sennheiser
Model HD 660S HD 820
Photo
Release Date 2017 2018
HifiSpecs Rating
Amazon Rating
Price

General Specifications

Type, design and features.

Headphone Type Over-ear (circumaural) Over-ear (circumaural)
Earcup Design Open-back Closed-back
Noise Options None None
Transducer Technology Dynamic Dynamic
Microphone No No
Connectivity Wired Wired
Cable Length ~3 m
~9.84 ft
~387.5 in
~3 m
~9.84 ft
~387.5 in
Detachable Cable Yes Yes
Battery Life - -
Battery Quick Charge - -
Water Protection No No
Inputs 6.35 mm, 4.4 mm, XLR-4 (optional)
Controls No -
Foldable No No

Technical Specs

Tech specifications of the headphones.

Frequency Response [Hz] 9 – 41,500 12 - 43800 Hz (-3 dB), 6 - 48000 Hz (-10 dB)
Impedance [Ohms] 150 300
Maximum Input Power [mW] - 0.5
Maximum SPL 104 103
Distortion < 0,04% -
Driver Diameter 44.1 mm 56 mm

Dimensions and Weight

Physical characteristics of the speakers (without stands).

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

Packaging Info

Package dimensions and weight.

Shipping Length ~12.6 in
~320.04 mm
~32 cm
~13.4 in
~340.36 mm
~34.04 cm
Shipping Width ~10.1 in
~256.54 mm
~25.65 cm
~11.4 in
~193.04 mm
~19.3 cm
Shipping Height ~4.2 in
~106.68 mm
~10.67 cm
~5.1 in
~129.54 mm
~12.95 cm
Shipping Weight ~3.4 lb
~1542.21 g
~1.54 kg
~8.38 lb
~3801.1 g
~3.8 kg

Colors and Accessories

List of available colors and optional accessories.

Colors
  • Black
  • Black
Replacable Earpads Yes Yes
What's in the Box
  • 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
  • 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

Price and Warranty

Satisfaction is (not) guaranteed.

Warranty 2 Years 2 Years
Amazon Price

Review Comparison

Hifispecs' professional customer-reviews can help make up your mind.

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