INTRODUCTION
Thank you for your purchase of the HA204 Headphone Distributor (Pat.
Pend.). The HA204 will power four pairs of stereo earphones or headphones
for high quality audio monitoring. The unit is ideal for expanding head-
phone/earphone outputs on portable CD players, DVD players, electronic
game units etc.
DESCRIPTION
REAR
STEREO INPUT: Stereo 1/8" TRS jack for
connection to a stereo line-level source.
This jack may also be connected to a
stereo headphone output.
DC PWR: For connection to an optional
AC power supply. Rolls Model PS27 12VDC, 150mA.
ON/OFF SWITCH: Connects/disconnects primary power to the HA204.
TOP
PWR LED: Indicates that the HA204 is in
operation via battery power, or connected
to an external AC power supply and is
receiving power.
LEVEL 1 - 4: Controls the level of the
indicated channel output.
FRONT
OUT ONE - FOUR: 1/8" stereo TRS jack
for connection to stereo headphones/
earphones.
CAUTION:
Plugging a mono plug into
the Phone Outputs may cause permanent damage to the unit. Use ONLY
TRS stereo plugs in these jacks.
SPECIFICATIONS
Input Impedance: 100K 9 unbalanced
Max Input Level: +14 dBV
Input Connectors: Stereo 1/8" (3.5mm) TRS phone
Outputs: (4) 1/8" (3.5mm) Stereo TRS phone
Output Impedance: 51 9 each output
Max Gain: 20 dB/Channel
S/N Ratio: >90 dB
THD: <.008%
IMD (SMPTE) <.008%
Power: 9V battery (not included)
12 VDC adapter (Rolls Model PS27)
Weight: 1 lbs (.45Kg)
Size: 3" x 4" x 1.25" (8 x 10 x 3.2 cm)
STEREO
INPUT
PWR
4
3
2
OUT
ONE
OUT
THREE
OUT
FOUR
OUT
TWO
1
LEVEL
LEVEL
LEVEL
LEVEL
12 VDC
+
-
ON
OFF
Pat. Pend.
www.rolls.com
2x4
two by four
Headphone/Earp ho n e
Amplifier
BOTTOM
Battery Cover: For battery replacement,
carefully press in the tab at the top of the
battery cover and remove the battery.
Replace with new 9 volt (alkaline recom-
mended) battery observing polarity. Place
the new battery into the HA204 battery slot
and replace the battery cover.
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