g
1
g
2
HD669
Studio
Standard
Headphones
Instruction Manual
Features
The HD669 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.
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:
y
y
y
y
y
y
y
y
y
y
y
Professional monitoring headphones
High resolution drivers
Precision tuned acoustic chamber
Extended bass response
Patented durable structure
Comfort autio fit head pads
Comfortable, long-lasting ear pads
Detachable, single side cable
Optimized headband pressure
Light weight
Cable clip included
Technical data
Frequency response
10 – 30,000Hz
Acoustic principle
Dynamic, closed-back
Nominal impedance
56 Ω
Sound pressure level at 1KHz
98dB SPL (1mW)
Long-term max. input power
200 mW
THD
≤0.3%
Headphone caliper pressure
Approx. 5N
Weight (without cable)
225g / 7.9oz
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,
Φ
3.5
dB SPL
85
88
91
94
97
100
103
106
109
112
115
Occupational
noise exposure
1991
8 hours (90dB SPL)
6 hours (92dB SPL)
4 hours (95dB SPL)
3 hours
2 hours
1.5 hours (102dB SPL)
1 hour (105dB SPL)
30 min (110dB SPL)
15 min
NIOSH
and CDC
2002
8 hours
4 hours
2 hours
1 hour
30 min
15 min
7.5 min
< 4 min
< 2 min
~ 1 min
~ 30 sec
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
