Go Back   Home > Forums > >

Digital Line Level DACs, Digital Crossovers, Equalizers, etc.

So how can you run a 5.1 active crossover system?
So how can you run a 5.1 active crossover system?
Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools
Old 21st November 2020, 08:23 PM   #1
head_unit is offline head_unit  United States
diyAudio Member
 
Join Date: Feb 2004
Location: Los Angeles
So how can you run a 5.1 active crossover system?
Default So how can you run a 5.1 active crossover system?

By which let me clarify, to include eARC from my TV, Airplay, HDMI input for a disc player, remote volume control, and room correction. And hopefully not spending a billion dollars.

I want to run a system of fullrange very efficient 2-way woofer/horn combos, maybe needing subwoofers and therefore possibly 5.1 bass management, and something like Audyssey/Dirac to fix the high frequency response droop of constant directivity horns. My default and seemingly cheapest idea is an AVR with preouts, AVR powering woofers and DSP amps powering the horns, the DSP providing highpass crossover and time delay versus the woofers. This is a little kludgy as it makes an extra A/D-D/A step.

I know miniDSP (and I presume others) make a variety modules. But is there any way to really do what I want without buying a expensive AVR or pre-pro? Or might I just as well stick to my kludgy plan?
  Reply With Quote
Old 22nd November 2020, 12:51 PM   #2
Markw4 is online now Markw4  United States
diyAudio Member
 
Join Date: Jul 2016
Location: California
5.1 content is likely to be encrypted until it just before it passes through the dacs in a box that is licensed to decode the audio. Licenses are not offered to individuals, only to serious commercial manufacturers.

Also, IMO an extra A/D-D/A step is non-starter. Sound quality goes in the trash. It was already probably bad enough coming out of the decoder box, be it an AVR or whatever.

Only way I would personally consider would be to grab the digital audio between the decryption outputs and the internal dac inputs inside a commercial AVR (or some similar decoder box).

Last edited by Markw4; 22nd November 2020 at 12:54 PM.
  Reply With Quote
Old 22nd November 2020, 06:23 PM   #3
head_unit is offline head_unit  United States
diyAudio Member
 
Join Date: Feb 2004
Location: Los Angeles
So how can you run a 5.1 active crossover system?
Quote:
Originally Posted by Markw4 View Post
5.1 content..Licenses are... offered...only to serious commercial manufacturers...an extra A/D-D/A step is non-starter. Sound quality goes in the trash...grab the digital audio between the decryption outputs and the internal dac inputs...
That last is beyond anything I am getting into. As for the licenses, that was part of my question-IS there anything besides AVRs or pre-pros which will actually decode? I see folks doing stuff with miniDSP etc but that all seems 2-channel. I read Kal Rubinson doing multiple DACs in crazy expensive setups which is not what I can do either, I have other expenditures like building the speakers themselves. And I am not fond of passive crossovers for horns, as their impedance is generally messy plus you cannot do any time alignment. Maybe I'm stuck?
  Reply With Quote
Old 22nd November 2020, 07:34 PM   #4
wealas is online now wealas
diyAudio Member
 
Join Date: Apr 2017
Yes, pretty much all modern computer video/audio player software decodes all but the most exotic audio formats to multichannel PCM which can be then passed to any digital convolver/DSP/whatever you need software for processing.
Your best chance is probably to combine each source (eARC, Airplay, etc) with software to give you multichannel PCM and feed all of those to single software for DSP/etc and then feed the output to your chosen DAC/amp combo.
  Reply With Quote
Old 23rd November 2020, 08:33 PM   #5
dangus is offline dangus  Canada
diyAudio Member
 
Join Date: May 2004
Location: Vancouver Island
If the DSP is after the AVR, then you're wasting bits of resolution since the gain control is happening in the AVR. And you'll need low-pass passive filters on the woofers if they're being driven by the AVR's amps.
The sensible way is to just go with an AVR and passive crossovers in the speakers. Otherwise, rip your discs to mkv and play them back on an HTPC and (hopefully) do all the DSP stuff on the sound card. If there's a sound card that supports bi-amping 5 channels; maybe you'll need two cards Add a tuner (card or USB) for over-the-air HDTV or Clear-QAM cable. The problem there is that if you do multichannel volume control on the sound card, you're probably (again) losing bits of resolution. So, you need an external 6 or more channel gain control, or AVR with multichannel analog inputs.
The cheapest pre/pro for HDMI that I've come across was from Emotiva, but reviews suggest that they didn't have all the bugs worked out. Personally, I've stopped worrying too much about multichannel HDMI audio since the majority of the media I consume still doesn't need anything better than S/PDIF.

Last edited by dangus; 23rd November 2020 at 08:55 PM.
  Reply to this post

Reply


So how can you run a 5.1 active crossover system?Hide this!Advertise here!
Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Can you use a digital active crossover to design a passive analog crossover ? RickDangerous Digital Line Level 28 22nd November 2020 06:32 PM
CA-1000 Yamaha Class A run, Class B won't run randomproblem Solid State 5 27th April 2019 02:37 AM
NEW GUY! So run, run as fast as you can and as far away as possible! Formula350 Introductions 9 13th November 2010 09:59 PM
Can you run a Fender Twin Reverb with only two 6L6's? garrett_92exp Instruments and Amps 5 3rd February 2006 12:34 PM
Thank-you thank-you thank-you thank-you and thank-you nonik Introductions 2 27th January 2004 12:21 PM


New To Site? Need Help?

All times are GMT. The time now is 06:44 PM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2020 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 15.79%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2020 DragonByte Technologies Ltd.
Copyright ©1999-2020 diyAudio
Wiki