Search found 5481 matches

by Bill Fitzmaurice
Thu Feb 02, 2023 7:39 am
Forum: Home Theatre/Stereo/Auto Sound
Topic: TLAH sound
Replies: 19
Views: 344

Re: TLAH sound

I should have used hot water on the wood before using the stain Can you elaborate on this, or link a technique, I'm interested in experimenting with different finishes, and know zero about staining. Hot water raises the little whiskers that hide in the grain of the wood, so they can be sanded off. ...
by Bill Fitzmaurice
Wed Feb 01, 2023 2:20 pm
Forum: Introduce Yourself
Topic: Hello. New member looking for advice on club system build.
Replies: 6
Views: 156

Re: Hello. New member looking for advice on club system build.

Regarding the acoustics, any hard surface is a problem, be it walls, floors, ceilings or windows. Some things you can't fix, like floors in a commercial setting. That makes it more critical that the rest be non-reflective. That can be accomplished with drapes on the walls and windows, flame proof of...
by Bill Fitzmaurice
Wed Feb 01, 2023 10:34 am
Forum: Build Threads
Topic: OmniTop 12 build
Replies: 15
Views: 325

Re: OmniTop 12 build

That lip is far too small to have any effect. Anything less than a quarter wavelength in dimension is invisible to sound waves. A quarter wavelength at 2kHz is 1.9 inches.
by Bill Fitzmaurice
Wed Feb 01, 2023 10:28 am
Forum: Home Theatre/Stereo/Auto Sound
Topic: TLAH sound
Replies: 19
Views: 344

Re: TLAH sound

The sensitivity is something else and the way they can make a voice really sound authentic and real is very cool. When someone comes into my house when I have the TV on they think that the voices they hear coming from the living room are actual people in the living room, not the TV. It's something ...
by Bill Fitzmaurice
Mon Jan 30, 2023 4:56 pm
Forum: Home Theatre/Stereo/Auto Sound
Topic: TLAH sound
Replies: 19
Views: 344

Re: TLAH sound

Before break in the suspension and spider are stiff, so Fs is higher than after they break in. The peaks and valleys are room sourced. My chart doesn't have them because I measured mine outdoors. Mic/listening position makes a world of difference as well: http://ethanwiner.com/believe.html
by Bill Fitzmaurice
Mon Jan 30, 2023 1:48 pm
Forum: Home Theatre/Stereo/Auto Sound
Topic: TLAH sound
Replies: 19
Views: 344

Re: TLAH sound

That's mine.
by Bill Fitzmaurice
Mon Jan 30, 2023 7:46 am
Forum: Home Theatre/Stereo/Auto Sound
Topic: TLAH sound
Replies: 19
Views: 344

Re: TLAH sound

No, because baffle step is a red herring. It reduces sensitivity by 6dB above where the baffle is 1 wavelength in dimension. That's all well and good if the speaker is used outdoors away from buildings, but it ignores what happens when the speaker is in a room. EQ is what you use, as it takes the ro...
by Bill Fitzmaurice
Sun Jan 29, 2023 10:09 pm
Forum: Home Theatre/Stereo/Auto Sound
Topic: TLAH sound
Replies: 19
Views: 344

Re: TLAH sound

I don't see mention of your subs.
by Bill Fitzmaurice
Sun Jan 29, 2023 7:52 pm
Forum: Home Theatre/Stereo/Auto Sound
Topic: TLAH sound
Replies: 19
Views: 344

Re: TLAH sound

I use HolmImpulse. There are a number of RTA programs available. REW is another.
by Bill Fitzmaurice
Sun Jan 29, 2023 4:42 pm
Forum: Home Theatre/Stereo/Auto Sound
Topic: TLAH sound
Replies: 19
Views: 344

Re: TLAH sound

Without seeing an SPL chart I can't venture an opinion.
by Bill Fitzmaurice
Sat Jan 28, 2023 10:07 pm
Forum: Tips, Techniques and Supplier Links
Topic: Australian Options - Suppliers / Drivers etc
Replies: 134
Views: 79644

Re: Australian Options - Suppliers / Drivers etc

The mob is "Ply Online", their 1/4 or 6mm is 5 ply (the plans specify 3 only). Just wondering if because the 5mm is "bendy" and 1mm thinner, whether it's strong enough, and if it we can use it, which grain is best, cross or long? I could make the 8mm work, but is 2mm going to up...
by Bill Fitzmaurice
Thu Jan 26, 2023 12:34 pm
Forum: Tips, Techniques and Supplier Links
Topic: Epique E150HE-44 5-1/2" DVC MMAG Extended Range Subwoofer
Replies: 2
Views: 31

Re: Epique E150HE-44 5-1/2" DVC MMAG Extended Range Subwoofer

Vd is 139.7cc. The Vd of an average eight, like the Dayton DCS205-4, is 180cc. The Dayton also has lower Fs. It's not a driver that I'd use.
by Bill Fitzmaurice
Sun Jan 22, 2023 8:14 pm
Forum: Home Theatre/Stereo/Auto Sound
Topic: David build
Replies: 32
Views: 1401

Re: David build

It's not the midranges, since the crossover is at 200Hz. Those deep peaks and valleys are classic boundary effect. The good news is that they're not severe. Using EQ to boost the nulls and reduce the peaks should do the trick. The response you have to 30Hz most speakers, at any price, can only dream...
by Bill Fitzmaurice
Wed Jan 18, 2023 10:37 am
Forum: Omni Bass/Key/PA Speakers
Topic: Finally! Omni 12 Tall Boy build
Replies: 180
Views: 5122

Re: Finally! Omni 12 Tall Boy build

There's no advantage to foam over polyester batting when they're of equal thickness.
by Bill Fitzmaurice
Tue Jan 17, 2023 1:01 pm
Forum: Home Theatre/Stereo/Auto Sound
Topic: Help picking sub, TTLS, Auto, or Tuba 18
Replies: 6
Views: 193

Re: Help picking sub, TTLS, Auto, or Tuba 18

At the minimum TTLS, two of them. Anything smaller won't add significant content, if any, to Cornwalls. Subs must be larger, a lot larger, than mains, not smaller.