Receiver Features
Speaker System Features
Inputs and Outputs Notes

Receiver Features

Power Output: The receiver's power outputs specifications are given both with 1 kHz and 20-20 kHz measurements:

• 65 watts RMS into 8Ω, 20-20kHz, 0.7% THD
• 90 watts RMS into 6Ω (impedance of the included speakers), 1kHz, 0.9% THD

192kHz/24-Bit Digital-to-Analog Converters: The TX-SR304 receiver is equipped with 192kHz/24-bit DACs to decode and play high-resolution recordings.

iPod Compatible: The DS-A2 Remote Interactive Dock for iPod (item number 580DSA2) provides an interface between an iPod digital media player and Onkyo receiver. 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.

Adjustable Crossover: This receiver has a built-in crossover for the subwoofer output. This setting is also used for any other speakers set to Small. The frequencies that you can choose from are 40, 50, 60, 80, 100, 120, 150, and 200 Hz.

Double Bass: With the double bass feature you can boost the bass output by feeding the low frequency signals from the left and right channels (when front speakers set to large) to both the front speakers and to the subwoofer.

Assignable Digital Inputs: The TX-SR304 has 3 assignable digital inputs (2 optical, 1 coaxial) allowing you to tell the unit which input source is connected to which digital input jack.

Multi-channel Input: Although this unit features built-in Dolby Digital, Dolby Pro Logic II, and DTS processing, it also has a 5.1 multi-channel analog input for use with external multi-channel decoders (DVD-Audio, SACD, etc).

Audio Sync: Occasionally the audio and video signals are not properly synchronized, typically when using a progressive scanning DVD player. You can correct this by delaying the audio; options are 0 (no delay), 20, or 40 milliseconds.

B Speaker Outputs: The B speaker outputs can be used to power speakers in a different room, creating a second zone. When the B speakers are turned on, the main room is reduced to a 2.1 channel system (front speakers and subwoofer).

Speaker Levels: Along with adjustments for the front, center, and surround speaker levels, the left and right B channel (2nd front) outputs can be adjusted from -12dB to +12dB relative to the A channels. This essentially gives you independent volume control for the A and B speaker outputs.

Listening Modes: This TX-SR304 receiver has a 32-bit Analog Devices DSP and incorporates a wide variety of listening modes to bring you maximum enjoyment from your audio and video software. The listening modes include:

• Surround Modes:
  • Dolby Digital
  • Dolby Pro Logic II (Movie, Music, and Game)
  • DTS
  • DTS Neo:6 (Cinema and Music)
• DSP Modes:
  • Mono Movie
  • Orchestra
  • Unplugged
  • Studio-Mix
  • TV Logic
  • All Channel Stereo
  • Full Mono

Direct Mode: This mode delivers pure sound with minimal sound quality adjustment and filtration. The sound recorded for the right and left front channels is output to the right and left front speakers and subwoofer only, not to the center or surround speakers.

CinemaFILTER Circuitry: This circuitry provides a subtle high-frequency roll off for proper playback of soundtracks in the home. It provides the means to easily remove excess treble response from soundtracks that were originally equalized to sound best in a large theater. This function works with the Dolby Digital and DTS modes, plus the Dolby Pro Logic II Movie and DTS Neo:6 Cinema modes.

Late Night: The Late Night feature limits the dynamic range of Dolby Digital recordings making 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. The settings are: Off, Low, and High.

Note: This feature only works with Dolby Digital Encoded software and the amount of effect will vary based on the individual soundtrack.

Dolby Pro Logic II Music Mode: While listening in the Dolby Pro Logic II Music format, there are three further enhancements you can enjoy (available with 2 channel sources only):

• Panorama: broadens the front stereo image to the surround speakers to provide a wraparound effect, especially effective when there is limited output from the surround channels, panorama can be turned on/off in the menu
• Dimension: allows you to move the sound field forward or backward
• Center Width: allows you to adjust the width of the center channel

Center Image: In the DTS Neo:6 Music mode, the Center Image feature adjusts the output of the left and right channels relative to the center channel, allowing you to make the center channel more or less dominant as needed. This improves the image of the center channel, especially when the listener is off-center. Adjustment varies from 5 (nothing subtracted from the L/R channels) to 0 (L/R channel output is cut in half).

Sleep Timer: From the remote, you can set the unit to automatically turn off after a preset amount of time. The sleep timer can be adjusted from 10 minutes to 90 minutes in 10-minute increments.

Direct Change: When playback is started on a component connected via the Remote Interactive (RI) jack, the receiver automatically selects that component as the input source.

Input Display: The name displayed for most inputs is fixed (DVD, CD, etc), but the Tape and Video 3 input displays can be changed. Tape can be changed to MD, CDR, or HDD and Video 3 can be changed to HDD. These settings also effect the Remote Interactive (wired remote) codes output to other connected components.

Note: Only one of the input labels can be changed to HDD.

Display Dimmer: The display illumination has three brightness level settings.

Wireless Remote: The RC-645S remote is programmed to operate this unit and other Onkyo components; including a cassette deck, DVD player, CD player, Mini-Disc player/recorder, and CD recorder. When combined with the DS-A2 iPod dock the remote offers basic control of your compatible iPod as well.

Speaker Outputs: The speaker terminals are spring terminals, they will accept pin connectors and bare wire up to 14 gauge.

Speaker System Features

Powered Subwoofer: The 230 watt powered subwoofer features a 10" down-firing woofer in a bass reflex enclosure. The subwoofer has a single RCA line input for use with the supplied cable. The subwoofer automatically turns on when an input signal is received, and returns to standby mode when no signal has been input for about 5 minutes. An LED indicator on the front panel glows red when in standby mode and green when in operation. The volume control is on the rear panel. The sub's frequency response is 25 Hz to 150 Hz.

Front Speakers: The front speakers each use a 3/4" ceramic tweeter and a 3-1/4" cone woofer in a bass reflex enclosure. Each speaker has a set of spring clip terminals for use with the supplied speaker wire. Each enclosure has a non-removable black cloth grille. Two keyhole slots on the back of each enclosure allow you to wall-mount the speakers (horizontally or vertically) without any wall brackets. There is also a 1/4"-20 threaded insert on the back for use with a wall mount bracket or stand. The speakers' frequency response is 100 Hz to 22 kHz, sensitivity is 85 dB (1 watt/1 meter), the crossover point is 10 kHz, and they are magnetically shielded.

Center Channel Speaker: The matching center channel speaker features the same 3/4" ceramic tweeter and 3-1/4" cone woofer in a bass reflex enclosure. It has a set of spring clip terminals for use with the supplied speaker wire. The enclosure has a non-removable black cloth grille. Two keyhole slots on the back of each enclosure allow you to wall-mount the speakers (horizontally or vertically) without any wall brackets. There is also a 1/4"-20 threaded insert on the back for use with a wall mount bracket or stand. The speaker's sensitivity is 85 dB (1 watt/1 meter), its crossover point is 10 kHz, and it is magnetically shielded.

Surround Speakers: The surround speakers use a 3-1/4" full range cone driver in a bass reflex enclosure. Each speaker has a set of spring clip terminals for use with the supplied speaker wire. Each enclosure is covered by a non-removable, black cloth grille. Two keyhole slots on the back of each enclosure allow you to wall-mount the speakers (horizontally or vertically) without any wall brackets. There is also a 1/4"-20 threaded insert on the back for use with a wall mount bracket or stand. The speakers' frequency response is 100 Hz to 22 kHz and sensitivity is 83 dB (1 watt/1 meter).

Speaker Wiring: Color-coded speaker wire is provided for all 5 satellite speakers. Standard speaker wire can be substituted if longer lengths or thicker gauge speaker wire is desired.

Inputs and Outputs Notes

Component Video Inputs/Output: This unit has 3 component video inputs and 1 component video monitor output. The component video inputs/output band width is 5 Hz to 50 MHz, so they will accommodate an HDTV signal.

Multi-Channel Input: A 5.1-channel analog input accommodates present and future multi-channel formats.

Headphone Output: The receiver has a standard 1/4" headphone jack on the front panel. The speaker outputs are muted when headphones are plugged into the Phones jack. When you connect a pair of headphones, the listening mode automatically switches to Stereo, unless it's already set to Mono, Stereo, or Direct. When you disconnect the headphones, the previous listening mode is selected. The headphone volume for the left and right channels is adjustable (relative to one another) from -12 dB to +12 dB.

RI Remote Control Jack: The 1/8" RI (Remote Interactive) remote control jack on the receiver allows you to connect the receiver to other RI-remote capable Onkyo components.