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General| Type | Closed-back |
|---|---|
| Driver | Dynamic |
| Driver Diameter | 50 mm |
| Frequency Response | 10 Hz - 30 kHz |
| Sensitivity | 98 dB |
| Cable Length | 3 m |
| Connector | 3.5 mm |
| Design | Over-ear |
| Impedance | 150 ohms |
| Weight | 250 g |
Details the HD661 as closed-back dynamic headphones for professional studio use, emphasizing sound quality, comfort, and durability.
Highlights the headphones' attributes including noise attenuation, high-resolution drivers, self-adjusting headband, and detachable cable.
Covers acoustic design, driver, sensitivity, frequency response, input power, impedance, earpad, headband pressure, cable, connector, and net weight.
Provides guidelines from health organizations on safe listening times at various volume levels to prevent hearing damage.
Illustrates the included items: 1M and 3M straight cables, plug adapter, cable clip, and carrying pouch.
Instructions on how to replace ear pads for hygiene and how to change the detachable audio cables.
Guidance on cleaning the headphones using a soft damp cloth or mild soapy water, advising against solvent cleaners.
Provides contact details for Superlux Taiwan (marketing/sales) and Superlux Enterprise Development (Shanghai).
Visuals of included accessories like cables and clips, plus a recommended related product: HA3D Headphone amplifier.
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