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Omnimic from Parts Express question
Omnimic from Parts Express question
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Old 27th September 2011, 05:40 PM   #1
domtweaker is offline domtweaker  Canada
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Default Omnimic from Parts Express question

I m looking for a measurement system to design speakers .

Does anyone know if this Omnimic system is a decent and accurate tool for measuring speakers and rooms ?

Any input is great guys

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Old 29th April 2012, 06:17 PM   #2
damarsigns is offline damarsigns  Canada
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I have both omnimic, WT3 upgraded to DATS, xover pro, bassbox pro, Soundeasy and lspcad. These are all great tools, and will serve the need of any speaker builder. Omnimic is great for acoustic measurements but would need something to measure the electrical side of things - TS parameters, phase ect. Soundeasy on the other hand, is an all in one package but needs a usb pre with phantom power and mic to work, along with some resistors and wires ect or jig. Also it needs lots of time getting to know the program, as you will need to be able to understand at least most of the basic concepts. books like speaker building 201, loudspeaker cookbook and testing loudspeakers would be good starting point in understanding the program along with the manual and music and design guide ect.
In the end it comes down to how much you want to invest both in time learning, and money spent. I started with just wt3, xoverpro, and bassboxpro.
Personally I could not live without any of my gear. I use omnimic and WT3 for measurements as they are super simple to use, and soundeasy for crossover and system design ect. Omnimic offers flexibility especially if you are testing outside in a pit or tower.
If you are a beginner then WT3, omnimic, Xover-pro and bassbox is the way to go and easiest to use but a warning that xover pro is not an optimiser but I have had lots of success with it and gets you in the ballpark. If you are wanting to invest the time reading, learning, getting to know the program and only have the money for one ect - Soundeasy would be my choice in a heartbeat as I do feel that lspcad does not have the advanced features nor the better measurement aspect IMO.
Hope this helps
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Old 29th April 2012, 07:14 PM   #3
ByronInPortland is offline ByronInPortland  United States
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Location: Portland, Oregon
I second Damarsigns' opinion that the WT3 is a great, easy-to-use little gadget, and the Vance Dickason's Loudspeaker Design Cookbook is a good start.

If you want to get your feet wet without spending a lot, you can start with the following freeware:
Speaker Workshop Download
HOLM Acoustics
Speakerworkshop is supposed to be an all-in-one package, able to measure impedance and generate zma files, but there seems to be a flaw in the way it works with soundcards which I don't understand. So I use Dayton's WT3 to generate zma files and HOML Impulse to generate frequency-response files, then import them into SW to model cabinets and X-overs. Holm impulse has a lot of users and you'll find a lot of help online.
however, by the time you've bought the WT3, a measurement mic and phantom power supply and cables, you'll have spent ~$200, so maybe the Omnimic, at $300 is a good starting point.
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Old 29th April 2012, 08:16 PM   #4
damarsigns is offline damarsigns  Canada
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I personally have not used HOLM but will have a look. I have used REW and True RTA from a system response and SPL side of things and both of those are good for measurements (REW being free and a great program). Speaker workshop is something I had left out of my post as it does have some issues. Depending on your version of windows and soundcard ect, it likes to freeze on me and shut down which can be a pain lol . It can have bugs and does - but yes it is FREE and will get you into a complete building package for the least amount of money. It however also has a learning curve and is not as simple to use, but is a great program and I have respect for people that have learned how to use it properly. Many people here use SW and help is available to people if they have issues. Again I don’t think you can go wrong with omnimic and WT3 from a purchase side of things and overall ease of use ! . Considering that liberty instruments is behind it (omnimic) it’s a great choice but does cost $300 bucks. There are good free programs as always and maybe even downloading and playing with a few with just a cheap computer mic, would at least let you know if you like the software side of things layout ect.
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