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Signal routing

Overview

Each input channel can be sent, or routed, to any number of output channels. This is accomplished with the routing buttons at the top of the output channel strips:

Default routing settings for the miniDSP Flex (DL)

In addition to routing, the miniDSP Flex (DL) supports mixing, where input channels can be mixed at different levels to a single output channel. The complete set of routing controls along the top of the output channel strips is therefore also called the "matrix mixer."

Basic routing

To route an input channel to an output channel, click on the input channel's name. When routed, the button is green:

Basic routing of an input channel to an output channel

Note: if the input channel has been renamed, it's name will appear instead of e.g. "Input 1".

Mixing

To mix both input channels to an output, select both of them:

Miixing two input channels to an output channel

By default, each input channel is mixed at "full strength" – that is, without any attenuation, as indicated by the "0 dB" label. To mix at different levels, click on the level button and either use the slider or enter the desired value directly. The gain of the signal being mixed can be set to a value between -72 and +12 dB.

In this example, both channels are mixed at half level (-6 dB):

Mixing input channels at different levels to an output channel

Routing examples

This section illustrates a few examples of signal routing. The input and output channels have been renamed by typing in the labels at the top of the channel strips. We recommend you do the same to help avoid errors.

Subwoofer integration

The diagram below shows the connections for a stereo pair of speakers plus a single subwoofer. This is the simplest type of active system, so is a good introduction to the advanced features of the miniDSP Flex (DL). It is also known as a "2.1" system.

The stereo amplifier is connected to outputs 1 and 2, and the subwoofer is connected to output 3. In the diagram, it's a powered subwoofer. (Never connect an output of the Flex directly to a subwoofer driver or speaker.)

Typical connections for subwoofer integration with the
miniDSP Flex (DL)

Typical connections for subwoofer integration with the miniDSP Flex (DL)

The routing for this system is:

Routing for subwoofer integration in miniDSP Flex (DL)

The left and right inputs are sent to outputs 1 and 2. Both inputs are summed and sent to output 3. Outputs 1 and 2 will usually have a high pass crossover filter to remove the sub frequencies, and output 3 will have a low pass crossover filter.

Two-way active speaker

The diagram below shows the connections for a two-way active speaker. Amplification can be either a multichannel amplifier, or a pair of stereo amplifiers.

Typical connections for a two-way active speaker using the
miniDSP Flex (DL)

Typical connections for a two-way active speaker using the miniDSP Flex (DL)

The routing for this system is:

Routing for two-way active speaker in miniDSP Flex (DL)

The left input is routed to outputs 1 and 3, and the right input is routed to outputs 2 and 4. Each output channel will need a low pass filter for the woofers or a high pass filter for the tweeter.

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