Information on room set up, measurements, and audio theory Wed, 15 Apr 2026 10:50:21 +0000 Wed, 15 Apr 2026 10:50:21 +0000 HiFiCircuit http://www.hificircuit.com/community/forums/room-set-up-audio-theory-and-measurements.36/ Thu, 04 Mar 2021 22:00:58 +0000 http://www.hificircuit.com/community/threads/adding-an-mbm-to-a-typical-diysg-speaker.569/ http://www.hificircuit.com/community/threads/adding-an-mbm-to-a-typical-diysg-speaker.569/ invalid@example.com (Ryan Bouma) Ryan Bouma http://www.avsforum.com/forum/401-d...ass-module-your-diy-sound-group-speakers.html]]> 3 Tue, 26 Mar 2019 18:49:54 +0000 http://www.hificircuit.com/community/threads/ht-setup-fusion-15-1299-1099-mixing-volt-6-10-for-surrounds.608/ http://www.hificircuit.com/community/threads/ht-setup-fusion-15-1299-1099-mixing-volt-6-10-for-surrounds.608/ invalid@example.com (kdkns) kdkns
ROOM Dimensions:

18' deep
15.5' wide
10' Ceiling

*Room Notes*
1. Large entry way on left side, 4' in size. Can be closed with Pocket Doors for a sealed room.
2. I will have a 4 person HT seating in this room with reclining ability on all seats. The seats are...

HT setup, Fusion 15 / 1299/ 1099 + Mixing Volt 6 /10 for surrounds]]> 1 Tue, 26 Feb 2019 03:05:32 +0000 http://www.hificircuit.com/community/threads/xsim-schematic-based-crossover-design-program.388/ http://www.hificircuit.com/community/threads/xsim-schematic-based-crossover-design-program.388/ invalid@example.com (BillWaslo) BillWaslo
Download and try it, there are example files to play with. You might be surprised to find it is much easier than you thought.
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XSim is a "free-form" Windows-based passive...

XSim schematic based crossover design program]]> 2 Thu, 15 Nov 2018 15:50:12 +0000 http://www.hificircuit.com/community/threads/partially-recessing-enclosed-speakers-inside-drywall.3437/ http://www.hificircuit.com/community/threads/partially-recessing-enclosed-speakers-inside-drywall.3437/ invalid@example.com (Jeff Axelrod) Jeff Axelrod
Would it make sense to cut out the drywall and recess the enclosures into the wall to get another 4" so the speakers are lower profile and don't protrude into the room as much? Know of anyone having done this before?]]> 2 Sun, 07 Jan 2018 00:44:56 +0000 http://www.hificircuit.com/community/threads/understanding-subwoofer-driver-sensitivity-specs.3439/ http://www.hificircuit.com/community/threads/understanding-subwoofer-driver-sensitivity-specs.3439/ invalid@example.com (Jeff Axelrod) Jeff Axelrod
Anyone know how sensitivity numbers are measured for subs? Are they at the peak driver resonance as shown in the response plots, which are typically well above useful subwoofer frequencies? Or can I assume once they're in a proper enclosure that the published sensitivity will span the usable response?]]> 1 Wed, 03 Jan 2018 23:53:28 +0000 http://www.hificircuit.com/community/threads/is-baffle-step-compensation-obsolete-because-of-room-correction.3436/ http://www.hificircuit.com/community/threads/is-baffle-step-compensation-obsolete-because-of-room-correction.3436/ invalid@example.com (Jeff Axelrod) Jeff Axelrod Thu, 05 Oct 2017 01:26:36 +0000 http://www.hificircuit.com/community/threads/theater-setup-speakers-sound-proofing.988/ http://www.hificircuit.com/community/threads/theater-setup-speakers-sound-proofing.988/ invalid@example.com (Matt) Matt
Theater setup, speakers, sound proofing...]]> Tue, 03 Oct 2017 17:10:04 +0000 http://www.hificircuit.com/community/threads/question-on-measurement-setup.416/ http://www.hificircuit.com/community/threads/question-on-measurement-setup.416/ invalid@example.com (JoshK) JoshK

However, as I have actually never ran measurement before, I was hoping to clarify the setup. I was planning to use ARTA, but I have other software too.


I am not really certain about the loopback part. I get the laptop to soundcard to amp to DUT and mic plugged into soundcard, but what exactly is the loopback for?...

Question on measurement setup]]> 10 Tue, 13 Jun 2017 18:18:34 +0000 http://www.hificircuit.com/community/threads/can-decreased-seos-off-axis-response-be-reduced.674/ http://www.hificircuit.com/community/threads/can-decreased-seos-off-axis-response-be-reduced.674/ invalid@example.com (OLDSTEVE) OLDSTEVE
http://sound.whsites.net/project173.htm]]> Sun, 07 Aug 2016 04:44:23 +0000 http://www.hificircuit.com/community/threads/room-set-up-links.44/ http://www.hificircuit.com/community/threads/room-set-up-links.44/ invalid@example.com (rowuk) rowuk

The most important by Bill Waslo: http://libinst.com/PublicArticles/Setup%20of%20WG%20Speakers.pdf
http://www.mh-audio.nl/spk_calc.asp check the "acoustics" section.
http://www.goodsoundclub.com/Forums/ShowPost.aspx?PageIndex=1&postID=4421#4421
http://www.goodsoundclub.com/Forums/ShowPost.aspx?PageIndex=1&postID=2073#2073...

Room set up links]]> 1 Sat, 02 Jan 2016 06:16:06 +0000 http://www.hificircuit.com/community/threads/article-about-setting-up-controlled-directivity-waveguide-type-speakers.20/ http://www.hificircuit.com/community/threads/article-about-setting-up-controlled-directivity-waveguide-type-speakers.20/ invalid@example.com (BillWaslo) BillWaslo
I was getting bothered by several mentions I've seen in forums suggesting that the reason to toe-in waveguides was to minimize some kind of defect, so during some down time I wrote up a small article with diagrams and discussion about the real reason for toe-ing in. Not because we have to, but because it's the only speaker type that can really take advantage of toe-ing!

It's in the DIY Sound Group "Articles" section at...

Article about setting up controlled-directivity waveguide type speakers]]> 18 Tue, 29 Sep 2015 11:48:51 +0000 http://www.hificircuit.com/community/threads/fusion-series-distance-to-the-listener.507/ http://www.hificircuit.com/community/threads/fusion-series-distance-to-the-listener.507/ invalid@example.com (maxheidrich) maxheidrich
I had and Overnight sensation surround set up but I sold those to my brother so I could build something new. My first thought was the fusion 4 because they can be situated near wall, and I don't need great efficiency in a room this...

Fusion Series - Distance to the listener.]]> 1 Sun, 19 Apr 2015 16:31:01 +0000 http://www.hificircuit.com/community/threads/sound-file-and-voltage-on-audio-line.478/ http://www.hificircuit.com/community/threads/sound-file-and-voltage-on-audio-line.478/ invalid@example.com (roineust) roineust
I have this primitive hobby project, where an Arduino micro-controller board communicates with a Smartphone, via the phone audio jack. The phone plays these Audio files and the Arduino samples the voltage on the audio line, in order to discern between high voltage, low voltage and no voltage. It's a simple project and it already works OK without any amplification and that is how i want it to stay, for this project (without amplification).

But i...

Sound file and voltage on audio line.]]> 1 Fri, 08 Aug 2014 11:58:34 +0000 http://www.hificircuit.com/community/threads/handy-test-demo-file-dowbnloads.362/ http://www.hificircuit.com/community/threads/handy-test-demo-file-dowbnloads.362/ invalid@example.com (BillWaslo) BillWaslo ----

A square-wave sweep, for checking "transient perfect" operation, if that's something you're designing for. You'll have to have a microphone and an oscilloscope capable of triggering on a level/edge:
http://libinst.com/SynergyCalc/squarewave%20sweep.wav. Play it from your soundcard or...

Handy test/demo file dowbnloads!]]> 2 Tue, 26 Nov 2013 17:27:19 +0000 http://www.hificircuit.com/community/threads/useful-links-before-planning.42/ http://www.hificircuit.com/community/threads/useful-links-before-planning.42/ invalid@example.com (rowuk) rowuk


Best collection of web apps for speaker design: http://www.mh-audio.nl/spk_calc.asp


Transmission Line basics: http://www.quarter-wave.com/


More transmission line stuff:...

Useful links BEFORE planning]]> 2 Thu, 21 Nov 2013 02:18:04 +0000 http://www.hificircuit.com/community/threads/considering-a-baffle-wall-setup-seeking-speaker-insight.276/ http://www.hificircuit.com/community/threads/considering-a-baffle-wall-setup-seeking-speaker-insight.276/ invalid@example.com (Erinh) Erinh Guys, this is my first post here but I know most of you from the other forums (diy, avs, tech-talk, etc). So, howdy! This is going to be a long post, so I’ll try to be as brief as I can be, but please bear with me as this is essentially a congregated brain dump and plea for resolution to the (in)sanity.

I have a dedicated HT room upstairs. The room is upstairs, and is roughly 17ft wide, 26ft deep, and 8ft high ceilings. I have knee walls that are...

Considering a Baffle Wall setup... seeking speaker insight.]]> 2 Fri, 01 Nov 2013 22:52:20 +0000 http://www.hificircuit.com/community/threads/fusion-12-tempest-and-alchemy-mtm-placement-and-config.254/ http://www.hificircuit.com/community/threads/fusion-12-tempest-and-alchemy-mtm-placement-and-config.254/ invalid@example.com (grashopr2000) grashopr2000 Question for the theater fanatics - continuing tests of my new fusion 12 tempests (front left/right) and fusion 8 alchemy MTM center. When running test tones and walking around the room there are noticeable/audible increases and decreases in volume (easily 5 to 10 db on my decibel meter at various positions). I've taken measurements 5, 10, 12 feet away from the speakers and across the ~18 feet of seating with consistent variations.
...

Fusion 12 Tempest and Alchemy MTM placement and config]]> 4 Sat, 30 Jun 2012 10:18:17 +0000 http://www.hificircuit.com/community/threads/measuring-software.43/ http://www.hificircuit.com/community/threads/measuring-software.43/ invalid@example.com (rowuk) rowuk

http://sourceforge.net/projects/speakerworkshop/
http://www.tolvan.com/
http://www.artalabs.hr/download.htm
http://www.audiotester.de/...

Measuring Software]]>