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- Sony MDR RF4000K Wireless Headphones vs Sony MDR7509HD Wireless Headphones
Sony MDR-RF4000K Wireless Headphones vs Sony MDR7509HD Wireless Headphone comparison
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| key specs | ||||
| Headphone Type | Over-Ear | Over-Ear | ||
| Microphone | No | No | ||
| Connectivity | Wireless | Wireless | ||
| Type | Headphones | Headphones | ||
| Colour | Black | Black | ||
| general | ||||
| Brand | Sony | Sony | ||
| Model | MDR-RF4000K Wireless Headphones | MDR7509HD Wireless Headphones | ||
| Release date | February 11, 2010 | October 2, 2001 | ||
| Type | Headphones | Headphones | ||
| Headphone Type | Over-Ear | Over-Ear | ||
| Connectivity | Wireless | Wireless | ||
| Colour | Black | Black | ||
| Model Number | MDR-RF4000K | MDR7509HD | ||
| product details | ||||
| Microphone | No | No | ||
| Foldable | Yes | Yes | ||
| Connector Size | 3.5mm | 3.5mm | ||
| Weight (g) | 300.50 | - | ||
| connectivity features | ||||
| Bluetooth | Yes | Yes | ||
| battery features | ||||
| Battery Life (Hrs) | 8 | - | ||
| sound features | ||||
| Impedance (Ohms) | - | 24 | ||
| Sensitivity (dB) | - | 107 | ||
| Frequency Response Range | - | 5Hz-80,000Hz | ||
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