Optional Add-on Devices
WRAT (Wide Range Amplifier
Technology): This technology uses low-negative-feedback circuit topology for
accurate signal reproduction, improved dynamic signal-to-noise ratio, and better
delivery of power peaks.
Speaker Outputs: There are
binding post connectors for the A and B speaker outputs. The binding posts are
not 5-way because a plastic collar prevents their use with spade lugs; they will
accept bare wire, pin connectors, single banana plugs, and dual banana plugs.
Headphone Output: This receiver
has a standard 1/4" headphone output on the front panel. The A and B
speaker outputs are not automatically muted when you plug in headphones; they
must be turned off using the buttons above the headphone jack.
Zone 2: The TX-8555 has line level (stereo RCA) outputs for
a second zone. The zone 2 source is independent of the main zone and the level
can be fixed or variable.
Pure Audio: In this mode, the display and video circuitry are turned
off and the tone controls are bypassed, minimizing possible noise sources for
the ultimate in high-fidelity reproduction.
Direct: In this mode, audio from the input source is output directly,
bypassing the tone controls.
IntelliVolume: The IntelliVolume setup function allows you
set a volume correction value for each source, to prevent large jumps in volume
when switching from one source to another. This feature eliminates the
inconvenience of manually readjusting the volume control each time you switch
from a source with a weak signal to a source with a strong signal and vice
Volume Setup: The receiver volume can be configured in the
- Maximum Volume: prevent the volume from being turned
too high by setting a maximum levels; independently set maximum volumes in
the main zone and zone 2
- Power On Volume: specify the turned-on volume; choose
any volume level or Last (the same level that was used when the receiver was
turned off); independently set maximum volumes in the main zone and zone 2
- Mute Level: choose the level when you press the mute
button; total mute, -50 dB, -40 dB, -30 dB, -20 dB, or -10 dB
Sleep Function: From the
remote, you can set the unit to automatically turn off after as much as 90
minutes or as little as 10 minutes; choices are presented in 10-minute
Tuner Presets: Up to 40 radio presets can be programmed, AM
or FM; each
can be assigned a customized name, up to 8 alphanumeric characters.
Video: Although not a
surround sound receiver, the TX-8555 does have four composite video inputs and
an output; so it can be used in a basic A/V system.
Display Dimmer: The display can
be adjusted to one of three brightness levels.
The remote controls this unit and compatible Onkyo cassette players, CD
players, DVD players, and iPods (via the optional iPod Dock).
IR Input/Output: A commercially
available IR receiver can be connected to the IR In jack, allowing you to
control the receiver while you're in another room, or when the receiver is out
of sight. An optional IR emitter can be connected to the IR Out jack to pass IR
commands to other components.
RI Remote Control Jack:
The 1/8" RI remote control jack allows you to connect this receiver to
compatible Onkyo components and control them with the included remote.
Optional Add-on Devices
iPod Compatible: The DS-A4 Remote Interactive Dock for iPod
(580DSA4, sold separately) provides an interface between an iPod digital media player and
Onkyo TX-8555. Once the iPod is docked you can control basic functions such as
volume, play, stop, and skip via the Onkyo system's RI-compatible wireless
remote control. The dock also charges the battery in the iPod.
Satellite Ready: The Onkyo TX-8555 features proprietary
ports on the rear panel for XM and Sirius Satellite Radio connection. In
addition to the following necessary optional satellite tuners (sold separately),
you will need a subscription to XM and/or Sirius Satellite radio.
- XM Satellite Radio Ready: The receiver can be connected
to the optional XM Home Tuner and Antenna (220XHD2H1,
sold separately), allowing you to receive XM Satellite Radio through the
TX-8555. You can search XM radio stations by Channel, Category or Direct
Tuning. You can also choose to display the following XM information on the
receiver's display - Channel Name, Channel Number, Category Name, Artist
Name or Song Title.
- Sirius Satellite Radio Ready: The TX-8555 can also be
connected to the optional SiriusConnect Home Tuner kit (607SCH1
sold separately), which allows you to receive Sirius Satellite Radio through
the receiver. You can search Sirius radio stations by Channel, Category or
Direct Tuning. You can also choose to display the following Sirius
information on the receiver's display - Channel Name, Channel Number,
Category Name, Artist Name or Song Title.