18
Front Panel Controls
On-Off Button
Whenever the Halo Integrated is turned on, the soft blue glow behind its On-Off button will
change to red for a few seconds while its circuits stabilize. Then the red glow will be replaced
by a brighter blue glow to indicate normal operation. If the glow remains red after turn on or
while the amp is in use, it indicates that the protection circuits have been activated and no
sound will be heard from the speaker. The most common cause for the On-Off button to
remain red is a shorted speaker connection or the unit has overheated. See page 21 for more
details on the protection circuit.
Note: The front panel On-Off button and remote control On and Off buttons are
disabled when the rear panel Turn On Options switch is set to 12 V or AC
.
Headphone Output
The Halo Integrated is equipped with a dedicated high quality current-feedback headphone
amplifier based on the top grade Texas Instruments TPA6120A. This superior design allows
for an extremely high slew rate preventing odd order distortions which are responsible for
listening fatigue. The virtually instantaneous response to musical dynamics doesn’t raise the
noise floor or degrade the s/n ratio like typical headphone amps. The headphone amp circuit
was also designed with a low 10 ohms output impedance and high gain to drive headphones
rated up to 600 ohms.
The headphone jack accepts a 1/8” (3.5 mm) stereo mini plug. The Left and Right Speaker
Outputs and the Preamp output jacks (RCA and XLR) are muted whenever a headphone plug
is inserted into this jack. The L and R Record out jacks are not muted.
CAUTION:
Please note where the volume knob is set before unplugging your
headphones to avoid a sudden unexpected high level of sound that could
damage your speakers.
Aux Input Jack
For your convenience there is an input for a portable MP3 player or mobile phone on the front
panel. Connect the included cable with 3.5 mm stereo plugs between the portable player or
phone’s headphone jack and the Halo Integrated’s Aux Input jack. The Aux input has an
additional gain stage that boosts the input signal by 12 dB so that the volume level will remain
consistent as you listen to your other source components. For the best results set your
portable player’s volume to at least 75% of its maximum.
