# calculate

1. ### Feature Request: Calculate distortion only on graph limits (RTA)

REW Forum
If possible, a checkbox to calculate the distortion only on the visible area of the RTA graph would be excellent. Often measuring at higher frequency rates makes it much quicker, but there's often a rise in noise above 24 or 48khz. An option to limit the distortion, THD and THD+N calculations...
2. ### How does REW calculate Q?

REW Forum
I've taken some measurements of an Infinity 1260w both to calculate its TS paramters, as well as measuring the Qtc in the 38.6L sealed box I made for it. REW's calculation for Q of the impedance sweeps is close to but not exactly the same as what I get calculating Qes/Qms/Qts by hand, using the...
3. ### How do I calculate the brace volume?

DIY Subwoofers - General Discussion
If I have a 6ft^3 enclosure, how do I calculate the brace volume? I don't know what to put into the calculator.
4. ### Help me calculate the size

IB - Infinite Baffle Subwoofer Build Projects
Hi, right now I'm finally planning my new HT room and trying to figure out if I can fit an IB in it. It's gonna be a sealed off, room in room type of HT and around 24x17x9 ft big. No way to cut holes in walls or ceiling. the only way of doing an IB setup would be to build a huge "box". It...
5. ### Calculate T/S params: nothing happens

REW Forum
Hi, I've done an impedance measurement of a driver I had lying around (using a circuit I designed to buffer output and input stages). This is the .mdat file. I don't have a weighted measurement, but that's OK for now. I'm trying to have REW calculate some T/S parameters, but nothing happens...
6. ### Use REW to calculate room gain?

REW Forum
Is there a way to use REW to figure out how much room gain I'm getting? I'm in the process of looking for a new sub, or a pair of subs, and understand sealed designs rely on room gain to boost the lowest frequencies. I'm wondering if there's a way to use REW to figure out how much room gain...
7. ### Help Calculate Amp power needed for setup

Home Theater Receivers | Processors | Amps
Help me figure out how many watts I need per channel on a receiver. I plan on running 4 floor standing tower speakers and a center on the amp. The other 6 speakers will run off the receiver. 11.2 system. I used this formula sheet as provided by another HTS member. Just don't know how to...
8. ### REW won't calculate T/S for me

REW Forum
I've measured my speaker's impedance both with and without the added weights, but now REW won't calculate the T/S parameters for my speaker. I click on the Calculate Parameters button and nothing happens. Please help.
9. ### How to calculate a Field Coil for a 30 inch loudspeaker

DIY Subwoofers - General Discussion
:yikes:
10. ### delays how to calculate the right value

Audio Processing
hello to everyone I wish to ask if there is any math formula for calculate the delay in m/s have researched but not satisfactory results . Any help would be appreciated Best regards Francisco
11. ### How to calculate power requirements inorder to get the right conditioner and UPS

System Setup and Connection
What is the proper way to calculate the power consumption of my components so that I buy the right size power conditioner an UPS. The conditioner will manage all gear(blu-ray, cable box/DVR, receiver, Wii, projector, computer, UPS and TV). The UPS will plug into the conditioner and the...
12. ### How To Calculate Room Gain

Home Audio Acoustics
Is there a such thing as a calculator or equation to estimate a rooms gain curve? I have a livingroom connected to a kitchen with a very large opening between them, that could probably just as well not be there, and I would like to get somewhat of an estimate of what the cabin gain will be like...
13. ### How to calculate how much L of air a subwoofer moves?

DIY Subwoofers - General Discussion
I was wondering, how to calculate how much air a subwoofer moves in L at (x)hz? you have to multiply xmax with SD or vas?
14. ### as to calculate the average of the measures

REW Forum
is there a system to be able to calculate the average on the measures effected with rew? and how many measures needs to effect for calculating her/it? annacamilla.
15. ### Nice Site to calculate Absorbers

Home Audio Acoustics
http://www.mhsoft.nl/Helmholtzabsorber.asp br Gerd
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