Radial Trim-Two User Guide
Download the complete Users Guide.

Using The Trim-Two™

The following page describes how to use the Trim-Two. For complete details, feel free to download the manual by clicking on the icon at left.

Making Connections

The Radial Trim-Two was designed to be extremely easy to use. In essence, you plug in, adjust the volume and you are set to go! Before making connections, make sure all audio equipment is either turned down or off as this will prevent plug-in or turn-on transients from damaging more sensitive components such as tweeters.

Connect your source device to either of the ¼" RCA and 3.5mm connectors. These are all wired in parallel to allow the signal to pass through to feed another source. Note that as these are direct connections, it is always prudent to connect all audio components to the same power bar if at all possible. This will help avoid hum and buzz caused by ground loops.

Connect the XLR outputs to your mixing console using standard XLR cables. Turn on your PA system. Set the volume control on the Trim-Two fully counter-clockwise. Turn on the source and bring up the volume on the Trim-Two to the 12 o'clock position. Increase the volume on your mixer until you have reached a comfortable listening level.

Adjusting the Level

Set the Trim-Two level control to 2:00 o'clock. Turn up the PA system and set to a low level to make sure connections are good before your turn up. Listen. If you hear distortion, back down the level on the Trim-Two and compensate by increasing the level on the mixing console. Note that the level control has no effect on the thru-puts as they are direct parallel connections.

Using the MONO switch

Sometimes, it is beneficial to mix the stereo source to mono. This for example could be to reduce the channel count going to the PA or maybe to use the Trim-Two as a distribution point for two audio systems. The MONO switch is recessed so that it can be set & forgotten. This also avoids it being switched by mistake.

Lifting the ground

The Trim-Two employs transformers to balance the signal. The side benefit is that the transformers also isolate the input signal from the output, blocking stray DC voltage. This is a primary contributor to noise in a PA system. Once connected, if you still hear noise, try depressing the ground lift switch. This disconnects the audio ground by lifting pin-1 on both XLRs.