Accessories

Hall Research IR Emitter Cable and Cover - 500 ft Cable Length Learn More

GLI-3.5mm Stereo Audio Ground-Loop Isolator & Filter with 3.5mm connectors. Eliminates ground loop noise between any audio source such as a notebook PC and audio equipment. Perfect frequency response of +.03 db from 20 to 20,000Hz. Uses proprietary audio transformers and filters for total elimination of any spurious buzz and hum in the audio.

Have you ever connected a PC or notebook to an audio amp or a TV and gotten all kinds of ugly noise? Most people would answer yes, and that's because the audio output from these devices are not balanced. Professional equipment have balanced audio which uses a + and a - signal for each L/R side and therefore does not rely on ground. Any noise in the ground between the source of the Audio signal and the amplifier is automatically ignored. On the other hand unbalanced signals, such as the one coming out of your notebook, have no reference other than building/AC ground. In fact you may have noticed that if you disconnect your notebook power supply and ran on batteries the noise has gone away. This is because, by doing so you inadvertently eliminated the ground loop. Line-level audio is a very tiny low-level signal, so any noise in AC ground, even as little as 0.004v, will be quite audible - yuck!

The GLI-3.5mm is simply inserted in series with the audio and it literally eliminates the ground connection between the two sides, passes all the audio while filtering out any noise using high performance audio transformers.

In most cases the unit can be used in either direction, however it is designed so that the Female 3.5mm mini-stereo connector is to be used as input and the male connector is the output. The input side incorporates DC blocking capacitors. Some audio source equipment may have a DC bias voltage on their audio signal. In order to isolate this Bias level from the transformer coils, DC blocking capacitors are employed in the GLI-35mm.

It uses 1:1 audio transformers therefore it does not change the impedance. So if your load is 5K Ohm, adding the isolator in front of it, the source still sees a 5K Ohm load impedance.

A couple of important things to note:
The input side (the female 3.5mm at end of cable) has DC blocking capacitors, so it is a good idea to make sure to not reverse the input and output. Most audio sources should have these AC coupling caps on their outputs anyway (so their average output voltage is not biased at some DC voltage), but once in a while you have a source that has a DC output offset. If you connect the output with DC offset directly to the coils of the transformer a DC current will flow in the coil that may or may not affect the way the source behaves.

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Stereo Audio Ground-Loop Isolator & Filter with RCA connectors. Eliminates ground loop noise between any audio source such as DVD player, MP3 player, or notebook PC and audio equipment. Perfect frequency response of +.03 db from 20 to 20,000Hz. Uses proprietary audio transformers and filters for total elimination of any spurious buzz and hum in the audio.

Do you hear hum or noise in your audio setup with certain inputs? Most people would answer yes, and that's because in most installations the audio signals are not balanced. Professional equipment have balanced audio which uses a + and a - signal for each L/R side and therefore does not rely on ground. Any noise in the ground between the source of the Audio and what it is connected to is automatically ignored. On the other hand unbalanced signals, such as the one coming out of consumer equipment, have no reference other than building/AC ground. Line-level audio is a very tiny low-level signal, so any noise in AC ground, even as little as 0.004v, will be quite audible - yuck!

The unit is simply inserted in series with the audio and it literally eliminates the ground connection between the two sides, passes all the audio while filtering out any noise using high performance audio transformers.

In most cases the unit can be used in either direction, however it is designed so that the male RCA connectors on the molded cable are used as input and the female RCA connectors on the box are outputs. The input side incorporates DC blocking capacitors. Some audio source equipment may have a certain DC bias voltage on their audio output connectors. In order to isolate this Bias level from the transformer coils, DC blocking capacitors are employed by the GLI-RCA. The isolated output is automatically AC coupled and has no bias.

It uses 1:1 audio transformers therefore it does not change the impedance. So if your load is 5K Ohm, adding the isolator in front of it, the source still sees a 5K Ohm load impedance.

A couple of important things to note:
The input side (the male RCA at end of cable) has DC blocking capacitors, so it is a good idea to make sure to not reverse the input and output. Most audio sources should have these AC coupling caps on their outputs anyway (so their average output voltage is not biased at some DC voltage), but once in a while you have a source that has a DC output offset. If you connect the output with DC offset directly to the coils of the transformer a DC current will flow in the coil that may or may not affect the way the source behaves.

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The U2-160-4 is a USB 2.0 extender with built-in 4-Port Hub in the remote end for connection of up to 4 USB devices. The extender sends USB signals across a CAT5e/6 cable up to 50 meters at data rates to 480 Mbps. In most applications no additional power supply connection is needed as power is drawn from the host and sent through the CAT5e/6 cable. A universal power supply is included for use with power hungry USB devices.

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The U22-160 extends your host PC's USB 2.0 port across a single Cat5e/6 cable to 50 meters (165 ft) with data rates up to 480 Mb/s.

In most instances, no power supply is needed for either side as the local (host) side gets its power from the PC and it sends PoC (Power-over-Cable) to the remote (device) side. However for convenience a power supply is included that can be plugged in to the remote end for power hungry USB devices. The remote end has a two port hub built-in to allow connection of 2 USB Devices. The U22-160 is a perfect solution for industrial and commercial applications.

This product can be used to extend a broad range of USB devices like webcams, printers, keyboards, and disk drives up to 165 ft (50 m) using single Cat 5/6 cable.

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