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What are the features of the SUPERLUX HD668B headphones?
The SUPERLUX HD668B headphones feature:
• Professional monitoring headphones
• High resolution drivers
• Precision tuned acoustic chamber
• Extended bass response
• Patented durable structure
• Comfort auto fit head pads
• Comfortable, long-lasting ear pads
• Detachable, single side cable
• Optimized headband pressure
• Light weight
• Cable clip included
What are the technical specifications for the SUPERLUX HD668B?
• Frequency response: 10 – 30,000Hz
• Acoustic principle: Dynamic, semi-open
• Nominal impedance: 56 Ω
• Sound pressure level at 1KHz: 98dB SPL (1mW)
• Long-term max. input power: 300 mW
• THD: ≤0.03%
• Headphone caliper pressure: Approx. 3.5N
• Weight (without cable): 222 g
• Plug: 3.5 mm stereo gold coated plug
• Adapter: 3.5mm to 6.3 stereo gold coated plug
• Connecting cable: Detachable 1M and 3M, straight
What are the recommended safe listening guidelines for the SUPERLUX HD668B?
To avoid hearing damage, avoid using headphones with the volume turned up for an extended period. The following are guidelines by the Occupational Safety and Health Administration and CDC, NIOSH regarding noise exposure limits:
| dB SPL | Occupational noise exposure 1991 | NIOSH and CDC 2002 |
|---|---|---|
| 85 | 8 hours | |
| 88 | 8 hours (90dB SPL) | 4 hours |
| 91 | 6 hours (92dB SPL) | 2 hours |
| 94 | 4 hours (95dB SPL) | 1 hour |
| 97 | 3 hours | 30 min |
| 100 | 2 hours | 15 min |
| 103 | 1.5 hours (102dB SPL) | 7.5 min |
| 106 | 1 hour (105dB SPL) | < 4 min |
| 109 | 30 min (110dB SPL) | < 2 min |
| 112 | ~ 1 min | |
| 115 | 15 min | ~ 30 sec |
How do I operate the SUPERLUX HD668B headphones?
Follow these steps for proper use of your SUPERLUX HD668B:
1. Adjust the fit: Slide the headpads left or right to an ideal position for your comfort.
2. Wear the headphones: Put on the headphones and rest the headpads on your head.
3. Ensure proper sound: Since the headphones are a semi-open design, do not cover the back of the headphones to allow for natural sound.
How do I change the cable on my SUPERLUX HD668B?
To change the cable, simply unplug the cable at the connector, which functions like a standard headphone jack. You can then restore it with another compatible cable.
To secure the detachable cable and prevent it from being pulled out by accident, put the included cable clip on the cable.
How do I replace the ear pads on the SUPERLUX HD668B?
The ear pads should be replaced from time to time for hygienic reasons.
1. Simply remove the old ear pads by pulling them off the enclosures.
2. Restore the new set of pads by slowly fitting them along the edge of the enclosures.
The Ear Pad Kit EPK601 includes 1 pair of ear pads and 1 pair of foam disks.
How should I clean my SUPERLUX HD668B headphones?
To clean the headphones, use a soft damp cloth. If necessary, the headphones can be cleaned with soapy water (use a mild cleanser such as washing-up liquid).
Note: Do Not use solvent-containing cleansers!
What items are included with the SUPERLUX HD668B?
The SUPERLUX HD668B package includes:
• 1M straight cable (FD1YW)
• 3M straight cable (FD3YW)
• Plug adapter (JA10063350902)
• Cable Clip (LA1HD668B0100)
• Carrying Pouch (KW100068101SU)
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* Touchscreen: Swipe up/down with-in the PDF to scroll and pinch or spread with two fingers to zoom.
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