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MiniDSP Flex HT questions for first time setup.

rimmi2002

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Jul 23, 2025
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Hi ASR community,

I am in the process of building out a new hopefully end game (for me) 2.2 channel system. I previously ran a 5.2 setup with Ascend Acoustics Sierra 2 speakers on an Onkyo TX-NR7100.

New Setup Details:

I am looking forward to tinkering with the Flex HT. At this point I am just waiting on the amp. It's been 2 weeks since ordering so hopefully I will have it in another 2 weeks. In the meantime I was wondering if I can get some input on some questions.

Flex HT Setup Questions:

I read through the Flex HT manual and watched whichever videos I could to supplement my knowledge. Please see below for how I set up Bass Management / Channel routing / Matrix Mixer. Does it look correct for what I want to accomplish, where all audio 2.0/2.1/5.1/7.1 to be down mixed to 2.1. (the x.1 will go to 2x4HD).


image.png


Bass Management Above:

a. Given how I have it set up, does it mean both the Sub and Speakers will play bass from 70-120 hz if the audio signal has a subwoofer track?

b. Does muting a channel on this page mean it does not come into play later? I saw a Deer Creek Audio video where they muted all channels that they did not have speakers for. So not sure if I should mute them or not here if I plan on downmixing them later in the matrix mixer?

2. Channel Routing:


image (1).png


1. Copied it from the manual, not much going on here. Curious other than assigning where to place Bass Management Is there really anything else to do here?

image (2).png

Matrix Mixer: I mixed the audio to both channels. Once I get the amp, I'll test out how this sounds if I need the surrounds in there or not and if so at what dB attenuation. Curious if I get a 2.0 input signal with this setup, does it basically not have any to mix here? Since there is no signal to Center and surround channels?


Calibration Related Questions:

  1. FIR Filter Workflow: I’ve been reading up on FIR (Finite Impulse Response) filters for phase linearization, which is new to me. Is REW + rePhase still the gold standard for creating and exporting these? I noticed rePhase hasn’t seen an update since 2019—are there more modern (ideally free/low-cost) alternatives, or is the 2019 build still the best tool for the job?
  2. Dirac Live & FIR: Since the Flex HT supports the Dirac upgrade, I'm curious about the internal implementation. Does Dirac Live automatically generate and apply FIR filters for mixed-phase correction, or is it mostly sophisticated IIR (Infinite Impulse Response) EQ? Wonder if Dirac is worth it for this 2.2 setup, or if I can accomplish the same and learn some things along the way by doing it manually.
    1. Also if I am using Dirac and they apply FIRs, does that mean I can't use my own FIRs or that I have no control over how many Taps to allocate to each channel?

Thank you for the help!
 
any takers?
 
Hi ASR community,

I am in the process of building out a new hopefully end game (for me) 2.2 channel system.



Thank you for the help!

I do not have any miniDSP gear yet. But this is my exact use case (brands of gear are not the same BUT 2.2 is the same).
So very, very much looking for any information that someone would share!!!
 
Hi ASR community,

I am in the process of building out a new hopefully end game (for me) 2.2 channel system. I previously ran a 5.2 setup with Ascend Acoustics Sierra 2 speakers on an Onkyo TX-NR7100.

New Setup Details:

I am looking forward to tinkering with the Flex HT. At this point I am just waiting on the amp. It's been 2 weeks since ordering so hopefully I will have it in another 2 weeks. In the meantime I was wondering if I can get some input on some questions.




Calibration Related Questions:


  1. Dirac Live & FIR:Since the Flex HT supports the Dirac upgrade, I'm curious about the internal implementation. Does Dirac Live automatically generate and apply FIR filters for mixed-phase correction, or is it mostly sophisticated IIR (Infinite Impulse Response) EQ? Wonder if Dirac is worth it for this 2.2 setup, or if I can accomplish the same and learn some things along the way by doing it manually.
    1. Also if I am using Dirac and they apply FIRs, does that mean I can't use my own FIRs or that I have no control over how many Taps to allocate to each channel?

Thank you for the help!

The Flex HT does not support DIY FIR whether you order it with Dira Live or not. If ordered with DL, then of course DL does use FIR filters.
If you want to do your our FIR, you would have to use the 2*4HD or 2*4HD Flex. That is my understanding, you can always contact miniDSP.
 
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