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HD661
Professional Studio Headphone
Extended frequency response for accurate reliable sound reproduction
Use as monitoring headphones in a noisy environment
Broadcast and TV applications
Film and theatre applications
Recording applications
General Description
The HD661 is a closed-back dynamic
headphones. Sound quality meets the
demanding professional recording studio.
Patented sturdy structure provides
long lasting durability even in challenge
condition. Light weight and optimized
mechanical pressure provides long-term
wearing comfort. Equipped with 2 straight
cables, short one is 1 meter long for
palm size sound source on-the-move
applications. Long one is 3 meter long,
for professional monitoring applications.
Inter-connect both cables, for even more
distant requires. Included cable clip can
secure detachable cable from pulling out
by incident.
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Features
• Dynamic, closed-back circumaural
headphones
• High noise attenuation
• Ø40 mm high resolution drivers
• Patented self-adjusting headband for
great fit and maximum comfort
• Rotating ear pad construction for
convenient single-ear monitoring
• Detachable, single side cable
• Light weight
• Multicolor available
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Specifications
Acoustic Design
Dynamic, closed-back
Driver
ø40 mm, neodymium
Sensitivity
102 dB SPL (1mW) at 1KHz
Frequency Response
10 – 20,000 Hz
Maximum Input Power
200 mW
Rated Impedance
68 Ω@ 1KHz
Earpad
Leatherette
Head Band Pressure
Approx. 4.5 N
Cable
1-meter(3.3 ft.) & 3-meter (9.9 ft.)
straight cable, single-sided
Connector
Stereo mini jack
Net Weight
190 g (6.7 oz)
Attention
Hearing Damage
Avoid using headphones with the volume
turned up for an extended period of time.
Following are guide line by Occupational
Safety and Health Administration and
CDC, NIOSH:
dB
Occupational noise
NIOSH and CDC
SPL
exposure 1991
2002
85
8 hours
88
8 hours (90 dB SPL)
4 hours
91
6 hours (92 dB SPL)
2 hours
94
4 hours (95 dB SPL)
1 hours
97
3 hours
30 min
100
2 hours
15 min
103
1.5 hours (102 dB SPL)
7.5 min
106
1 hours (105 dB SPL)
< 4 min
109
30 min (110 dB SPL)
< 2 min
112
~ 1 min
115
15 min
~ 30 sec
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