Comparison and Difference Between
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Brand and Model Specifications
Information about the brand, model release date.
| Manufacturer | Sennheiser | Sennheiser |
| Model | HD 820 | HD 280 Pro |
| Photo |  |
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| Release Date | 2018 | 2012 |
| HifiSpecs Rating | ||
| Amazon Rating | ||
| Price |
General Specifications
Type, design and features.
| Headphone Type | Over-ear (circumaural) | Over-ear (circumaural) |
| Earcup Design | Closed-back | Closed-back |
| Noise Options | None | Noise-isolating |
| Transducer Technology | Dynamic | Dynamic |
| Microphone | No | No |
| Connectivity | Wired | Wired |
| Cable Length | ~3 m ~9.84 ft ~387.5 in |
~1-3 (coil) m ~3.28 ft ~129.17 in |
| Detachable Cable | Yes | Yes |
| Battery Life | - | - |
| Battery Quick Charge | - | - |
| Water Protection | No | No |
| Inputs | 6.35 mm, 4.4 mm, XLR-4 (optional) | 3.5mm (6.3 mm) |
| Controls | - | No |
| Foldable | No | Yes |
Technical Specs
Tech specifications of the headphones.
| Frequency Response [Hz] | 12 - 43800 Hz (-3 dB), 6 - 48000 Hz (-10 dB) | 8 - 25,000 |
| Impedance [Ohms] | 300 | 64 |
| Maximum Input Power [mW] | 0.5 | - |
| Maximum SPL | 103 | 102 |
| Distortion | - | <0.1% |
| Driver Diameter | 56 mm | - |
Dimensions and Weight
Physical characteristics of the speakers (without stands).
| Length | ~7.6 in ~193.04 mm ~19.3 cm |
~7.1 in ~180.34 mm ~18.03 cm |
| Width | ~7.6 in ~193.04 mm ~19.3 cm |
~5.5 in ~139.7 mm ~13.97 cm |
| Height | ~4.4 in ~111.76 mm ~11.18 cm |
~3.1 in ~78.74 mm ~7.87 cm |
| Weight | ~0.8 lb ~362.87 g ~0.36 kg |
~0.63 lb ~285.76 g ~0.29 kg |
Packaging Info
Package dimensions and weight.
| Shipping Length | ~13.4 in ~340.36 mm ~34.04 cm |
~8 in ~203.2 mm ~20.32 cm |
| Shipping Width | ~11.4 in ~289.56 mm ~28.96 cm |
~7 in ~139.7 mm ~13.97 cm |
| Shipping Height | ~5.1 in ~129.54 mm ~12.95 cm |
~4 in ~101.6 mm ~10.16 cm |
| Shipping Weight | ~8.38 lb ~3801.1 g ~3.8 kg |
~1.26 lb ~571.53 g ~0.57 kg |
Colors and Accessories
List of available colors and optional accessories.
| Colors |
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| Replacable Earpads | Yes | Yes |
| What's in the Box |
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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.
| Available Reviews |
Disclaimers
Small print and stuff...
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