Input and Output Notes
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.
Vector Linear Shaping Circuitry (VLSC):
Onkyo's proprietary VLSC significantly reduces pulse noise from digital
signals during the digital-to-analog conversion process to assure the signals
are delivered in all their purity. This adds more depth and clarity to all your
music sources (including digital music files) and movie soundtracks, and
faithfully reproduces the acoustic detail and subtle nuances of all your audio
sources. On the TX-SR604, the VLSC is used on the front left and right channels.
On-Screen Display (OSD): An OSD
can be displayed on your television for easy system setup. The arrow and enter
buttons on the remote allow you to navigate through the menus to select and set
The OSD is passed through the composite video, S-video, and component video monitor outputs.
HDMI Switching: The TX-SR604
has two HDMI inputs and one HDMI output for connecting DVD players, HDTV set-top
boxes, and other video components to your TV or projector. A single HDMI cable
carries digital video and audio signals. The HDMI inputs are compatible with DVI,
so TVs and displays with a DVI input can be connected by using an HDMI-to-DVI
adapter cable, along with audio cables. The receiver uses HDCP (High-bandwidth
Digital Content Protection), so only HDCP-compatible components can display the
picture. The HDMI inputs can accept and switch 480i, 480p, 720p, 1080i, and
1080p signals to a TV, monitor, or projector.
Component Video Switching: In
addition to HDMI, composite and S-Video switching, this unit can switch between high
resolution component video sources. There are 3 component video inputs and 1
component video output; each input and output has jacks labeled "Y", "Pb"
and "Pr". The component video inputs and outputs have a bandwidth of
5Hz to 50MHz.
(DACs): To decode and playback high-resolution recordings, this
receiver is equipped with 192kHz/24-bit DACs.
Automatic Speaker Setup: With
the supplied speaker setup microphone, the Audyssey 2EQ Automatic Speaker Setup function can
measure and correct the room acoustics in your listening room. The speaker setup
function measures the test tone output by each speaker and automatically determine the
number of speakers connected, their sizes, crossover frequencies, and the distance from each speaker to
the listening position. The supplied microphone is approximately 2" in diameter,
3/4" tall, and has a 20' cable that plugs into the front of the receiver.
There is a threaded insert on the bottom of the microphone so it can be mounted
on a tripod for accurate listening position placement. If you
wish to setup the speakers manually, you can follow the procedure for Speaker Configuration.
The distance from your listening position to each speaker can also be set
manually. The front speaker distance can be set from 1 to 30 feet in 1-foot
increments. The center and
subwoofer settings can be up to 5 feet more or 5 feet less than the distance you set for the front speakers. The settings for the surround left, surround right, surround back left, and surround back right
speakers are each individually adjustable, and they may be up to 5 feet more or 15 feet less than the distance you set for the front speakers.
You can manually adjust the level of individual speakers during playback between
-12dB and +12dB, and -15dB to +12dB for the subwoofer. These adjustments are
temporary, and will be canceled when the receiver is turned off.
Double Bass: You can enhance
the bass output by activating the Double Bass function. This function allows you
to feed bass frequencies to the front left and right channels and to the
subwoofer. Double Bass can be set only when the subwoofer is set to On, and
the front speakers are set to Full Band.
Adjustable Crossover: This
receiver has a built-in high-pass crossover for the speaker system. This setting is
available when you tell the receiver that there is a subwoofer being used. The frequencies that you can choose
from are: Full Band, 40, 50, 60, 80, 100, 120, 150, and 200 Hz. Frequencies
lower than the set crossover point are output by the subwoofer.
The built-in EQ can be set automatically using the Auto Speaker Setup or it can
be set manually. Each channel is individually adjusted. Each full range channel
(front, center, surround, and surround back) has five EQ bands; 80 Hz, 250 Hz,
800 Hz, 2.5 kHz, and 8 kHz. The range of adjustment runs from -6 dB to +6 dB in 1 dB increments.
XM Ready: Using an optional
XM Mini Tuner, a Mini Tuner Home Dock, and an XM subscription, you can take advantage of
the variety and sound quality of XM Satellite radio. XM offers over 170 digital channels
of music, news, sports, and talk radio and even has weather and traffic
information in several major markets. The channel number, channel name, artist
name, and song title are listed on the TX-SR604's display and on the connected
TV monitor. XM stations are stored as presets and recalled in the same way as AM
and FM stations.
iPod Compatible: The DS-A1 or DS-A2
Remote Interactive Dock for iPod (item #'s 580DSA1 and 580DSA2) provide an interface between
an iPod digital media player and Onkyo TX-SR604. Once the iPod is docked you can control basic functions such as volume control, play, stop, and
skip via the Onkyo system's RI-compatible wireless remote control. The dock also
charges the battery in the iPod, and allows you to view digital photos and video on an Onkyo home theater system.
Assignable Digital Inputs: The
TX-SR604 has 6 assignable digital inputs (4 optical/2 coaxial) allowing you to
specify which input source is connected to which digital input
The receiver is equipped with a 7.1 multi-channel input for compatibility with
external decoders or high resolution audio players such as DVD-Audio or SACD.
The input consists of left front, right front, center, subwoofer, left surround, right
surround, left surround back and right surround back RCA inputs.
Direct Mode: This mode delivers
pure sound with minimum sound quality adjustment and filtration. The sound
recorded for the right and left front channels is output to the right and left
front speakers only and not output to the subwoofer or rear speakers.
Zone 2 Output: This feature allows you to
enjoy one source in your main listening room, while another source plays in a
remote room. Depending on how you configure the receiver, using the dual zone
feature will require an amplifier and speakers, a set of powered speakers, or
simply a set of non-powered speakers located in a remote location. You can
connect the dedicated Zone 2 stereo RCA line outputs to a receiver/amplifier or
powered speakers in a remote room while powering a 7.1-channel speaker system in
the main room; the output level of the RCA line outs is fixed, so they must be
connected to an amplifier or powered speakers equipped with a volume control.
You can also connect a pair of speakers to the receiver's dedicated Zone 2
speaker terminals, and still power a 5.1-channel speaker system in the main
room. When the Zone 2 speaker terminals are turned on, the Surround Back speaker
outputs do not work. When the Zone 2 speaker terminals are off, the Surround
Back speakers outputs work as normal. The Zone 2 speaker output volume setting
can be controlled with the remote.
Listening Modes: This
receiver incorporates a wide variety of listening modes to bring you maximum
enjoyment from your audio and video software. The listening modes include:
audio from the input
source is output directly with minimal processing
- Stereo: sound is output
from the front left and right speakers and subwoofer
- Mono: sound is output from
the front left and right speakers and subwoofer
- Multi-channel (7.1-channel
- Dolby Pro Logic II:
expands any 2-channel source to 5.1 channels
- Dolby Pro Logic IIx:
expands any 2-channel source to 7.1 channels
- Dolby Digital
- Dolby Digital EX: expands
5.1-channel Dolby Digital and DTS sources to 6.1 or 7.1-channels
- DTS 96/24
- DTS Neo:6: expands any
2-channel source to 6.1-channels
- Neural Surround: surround
technology developed for music and adopted by XM Satellite Radio for
broadcasts of surround recordings and live events in surround sound.
- Onkyo Original DSP Modes
- Orchestra: for
classical or operatic music
- Unplugged: for
acoustic instruments, vocals, and jazz
- Studio-Mix: suitable
for rock or pop
- TV Logic: adds
realistic acoustics to TV shows
- Mono Movie: suitable
for old movies and other mono sources
- All Ch Stereo: ideal
for background music
- Full Mono: all
speakers output the same sound in mono
Assigning Listening Modes: You
can assign a default listening mode to each input source that will be selected
automatically when you select that source.
Using the CinemaFilter you soften overly bright movie soundtracks. Movie
soundtracks are typically mixed for a large theater (relative to your home
theater) with lots of soft seats and thick curtains on the walls. Home theater
settings often lack these high frequency absorbing wall treatments making the
soundtrack sound too bright. CinemaFilter accounts for this and for many movies
sounds more natural at home.
Late Night Feature: The Late
Night feature limits the dynamic range of Dolby Digital recordings. Limiting the dynamic range makes it easier
to find a volume that ensures the quiet sounds are not too quiet
and the loud sounds are not too loud for night time listening. This allows you
to comfortably listen to without the need to constantly adjust the volume to keep from waking
family/neighbors. The choices are: Off, Low, and High.
Note: This feature only
works with Dolby Digital Encoded software and the depth of the feature
will vary based on the individual software package.
The IntelliVolume setup function allows you set a volume correction value in the
range of -12dB to +12dB, in 1dB increments, 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 b
signal and vice versa.
Volume Setup: The receiver
volume can be configured in the following ways:
- Maximum Volume: You can
prevent the volume from being set too high by specifying a maximum level:
- Power On Volume: You can
specify the volume setting each time the receiver is turned on from 1
(minimum) to 99, MAX, or Last to use
the same level that was used when the receiver was turned off.
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
Display Dimmer: The display
illumination includes the green alphanumeric display and a blue ring around the
volume knob. You can dim the display as follows: Normal + Volume light on,
Normal + Volume light off, Dim + Volume light off, and Dimmer + Volume light
Multi-brand Remote: The supplied
RC-651M wireless remote is a multi-brand remote.
The remote is pre-programmed to operate Onkyo components, as well as other popular brands of
equipment, including DVD players, satellite receivers, cable boxes, VCRs, and
Input and Output Notes
Multi-channel Input: The
TX-SR604 has a multi-channel input for connecting a DVD player, a high
resolution audio player (such as a DVD-Audio or SACD player), or an external
decoder. The input consists of left front, right front, center, subwoofer, left
surround, right surround, left surround back and right surround back RCA inputs.
You can connect a component using only left and right audio jacks, if desired.
In addition, there are composite and S-video jacks for this input. Note:
The DVD input is included in the total of 7 A/V inputs.
Headphone Output: This receiver
has a standard 1/4" headphone output on the front panel. The speaker outputs,
except for the Zone 2 speakers, are muted when headphones are plugged in.
Speaker Outputs: There are
color-coded binding post connectors for the left front, right front, center,
left surround, right surround, left surround back, and right surround back
speakers. The binding posts are not 5-way because a
plastic collar prevents their use with spade lugs. The Zone 2 speaker terminals
are also binding post connectors.
IR Input: The IR input jack
allows you to control the receiver without line-of-sight access by purchasing an
optional IR remote control system and locating the remote sensor in sight. This
offers control from Zone 2, or when the receiver is located in a closed cabinet.
RI Remote Control Jack:
The 1/8" RI remote control jack allows you to connect this receiver to
compatible Onkyo components.
12 Volt Trigger: This 1/8"
mini-jack output can be connected to the 12-volt trigger input on a power
amplifier in Zone 2. When Zone 2 is turned on, a 12-volt/100 milliamp (max) trigger signal is