![]() MiniDSP active two-way speaker Example of parametric equalizerīelow is a measurement example for a woofer. Ideally, flatten the response to an octave above or below the crossover frequency (for woofers and tweeters, respectively). You can also do this with the help of the Room EQ Wizard's AutoEQ feature. Use "Peak" type filters to flatten peaks (with negative gain to create a notch) and "High-Shelf" and "Low-Shelf" type filters to straighten the overall response. Use PEQ blocks on each output channel to shape each driver's response to be flat across the operating range. (Do this for one loudspeaker only.) For more information on how to measure a loudspeaker driver, see "Speaker Measurement with UMIK-1 and REW". Once you've built the speaker and mounted the drivers, you'll need to measure the drivers one at a time. To implement a two-way crossover, set up the routing as shown in this screenshot. This is a key element of its flexibility. Generally with super tweeters capacitors from 1.0 to 1.5mF are used.ĪTTENTION: When carrying out important imports or changes, it is always advisable to switch off the final amplifiers to avoid damaging the drivers.Įach plug-in allows you to route or mix any input to any output. This will help protect the tweeter from being switched on and off by the amplifier or accidentally being sent low frequency test signals. ![]() We recommend placing a capacitor in series with each tweeter as shown. This diagram shows a typical connection, using the 2x4 HD as an example:Īctive two-way speaker miniDSP active speaker In this case, you will most likely need to remove the internal crossover and add a second pair of binding posts. If you are changing an existing speaker from passive to active then you already have the enclosure and drivers. For example, a popular Excel-based program is Unibox. Fortunately, there are a number of free programs that do the complex calculations for this based on the woofer's Thiele-Small parameters. The most important factor is the internal volume and, if it is a speaker with reflex ports, the size and length of the port. If you are building your own loudspeaker, you will need to complete the design first according to your tastes and needs. For a small two-way speaker, a 5" or 6.5" woofer and 1" dome tweeter are common choices. There are literally hundreds of drivers available for DIY use at all price levels, so it's impossible to give specific advice here. If you're starting from scratch, you'll need to select drivers for your speakers. Select speaker drivers and design the speaker.The Xover (Crossover) block will be used to implement a conventional crossover (Linkwitz-Riley or Butterworth). In this case, we will use the PEQ (Parametric EQ) output channel to correct the response of individual drivers and allow Dirac Live to do overall response shaping as well as room correction. Next is the DDRC-24 plugin block diagram. The Xover (Crossover) block can be used to implement a conventional crossover (Linkwitz-Riley or Butterworth), or the FIR block used to implement a linear phase crossover. We'll use output channel PEQ (parametric EQ) to correct individual driver response and input channel PEQ to shape overall response and to tame room issues. 2 stereo power amplifiers or 4 mono power amplifiers.īelow is the block diagram of the MiniDSP-2x4-HD plug-in. You will need a measurement program such as the free Room EQ Wizard (REW) software and measurement hardware for which we recommend the UMIK-1 or UMIK-2.įour amplification channels, i.e. Refer to its User Manual and make sure you have the DSP software up and running before starting this read.Ībility to perform acoustic measurements. Select speaker drivers and design the enclosureĪ 4-output miniDSP processor.If you use the DDRC-24 or SHD plug-in, you can implement a conventional crossover (Linkwitz-Riley or Butterworth) you will be able to use Dirac Live to correct the impulse response, perform room correction and customize the final sound. If you use the miniDSP-2x4-HD plug-in, you can implement a conventional crossover (Linkwitz-Riley or Butterworth) or a linear phase crossover. miniDSP Flex (with miniDSP-2x4-HD or DDRC-24 plug-ins).In this section, we'll show you how to design a 2-way active loudspeaker with a 4-output miniDSP processor. ![]() Design of a 2-way active loudspeaker with miniDSP ![]()
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