Cautions regarding humming noise

If humming is heard even when the volume is turned down or the RDA-7.1 is turned off, then a “ground loop” may be occurring. A ground loop is a potential difference in the grounding of two or more electrically connected components. This potential difference creates multiple current routes when there should only be one. This potential difference results in a hum noise and at times it can be just a low level noise. With the increased sophistication of home theaters, the chance of grounding loops occurring has greatly increased. If humming occurs, before considering it due to faulty equipment, read the following information listed to the right.

1.Your cable television system wiring may be causing the hum.

To determine whether the cable television is the cause of the hum, disconnect the cable television cable (round 75- ohm cable) or the first component that the cable is connected to (the set-top box or VCR). If the humming stops, connect a commercially-available 75-ohm ground loop isolator before reconnecting the system. If the humming still continues, read 2, 3, and 4 below.

2. An input cable is causing the hum

Turn off the entire system and disconnect all input cables. If the humming stops, reconnect the cables one at a time to determine the faulty cable. If the hum continues after all input cables are reconnected, contact an Onkyo service station or representative.

3. AC ground terminal loop

An AC ground terminal loop will cause the loudest hum. When grounding a system that uses a power cord with a three-pronged plug, be aware of components with a grounding terminal. If you cannot alter your home wiring to an insulated star-shaped grounding configuration, try an insulation transformer.

Caution

Never remove the ground terminal (the third round terminal) from the plug of the power cord that comes with the RDA-7.1. Doing so is very dangerous for it may cause an electrical shock or even electrocution.

4.Improper grounding in your home is causing the hum

In most cases, a water pipe is used as the ground in your home. Make sure that the connection is strong by checking for loose pipes or excessive corrosion. The most certain remedy is to ground the system independently. Drive a 5-foot (1.5-m) or longer copper-plated steel grounding pole into the ground and use this as the system ground. If you have questions regarding this procedure consult an electrician or your local electrical company.

If after exhausting all the possibilities given above the humming continues, contact an Onkyo service station or representative.

5.Both the balanced-line inputs and RCA inputs are connected

Unconnect either set and make sure the input selector switch is set to the correct position.

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Onkyo RDA-7.1 Your cable television system wiring may be causing the hum, An input cable is causing the hum
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RDA-7.1 specifications

The Onkyo RDA-7.1 is a high-performance AV receiver designed to elevate your home entertainment experience. This unit stands out in the crowded market of audio-video receivers, offering a blend of advanced technology, quality construction, and user-friendly features.

One of the primary highlights of the RDA-7.1 is its 7.1 channel surround sound capability. This allows users to immerse themselves in a true cinematic audio experience, whether they're watching movies, playing video games, or listening to music. The receiver boasts a robust output power rating, delivering clear and dynamic audio that fills the entire room.

The Onkyo RDA-7.1 supports a variety of audio formats, including Dolby Atmos and DTS:X, which provide three-dimensional soundscapes by adding height channels to traditional surround sound setups. This feature significantly enhances the realism of audio playback, making you feel as if you are part of the action.

Connectivity is another area where the RDA-7.1 excels. It comes equipped with multiple HDMI inputs, allowing for seamless integration with a range of devices, including Blu-ray players, gaming consoles, and streaming devices. The receiver also supports 4K video pass-through and HDR, ensuring that your visual experience is just as impressive as the audio.

In terms of user interface, the RDA-7.1 offers an intuitive on-screen display that simplifies the setup process. It also includes an auto calibration feature that optimally adjusts the audio output based on your room's acoustics, making installation straightforward and hassle-free.

Additionally, the RDA-7.1 is designed with music lovers in mind. It features a high-quality DAC (Digital-to-Analog Converter) that enhances audio fidelity. This ensures that whether you're streaming music from your favorite service or playing back your carefully curated collection, you can expect superb sound quality.

With durable construction and a sleek design, the Onkyo RDA-7.1 fits seamlessly into any home theater setup. Its combination of powerful audio performance, advanced surround sound technologies, extensive connectivity options, and user-friendly features make it a prime candidate for anyone looking to enhance their home entertainment system.
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