Search found 3169 matches

by Grant Bunter
Mon Sep 25, 2023 4:40 pm
Forum: DR Horn Loaded Bass/Keyboard/PA Speakers
Topic: DR build questions
Replies: 108
Views: 475357

Re: DR build questions

Roger, thanks mate, it was more bringing the wires from the driver chamber through to the back, l was caught thinking l had to bring the wires through from the chamber through the horn throat closest to centre, not the case ay? I can run the wires wherever l like that way, just not out through the ...
by Grant Bunter
Sun Sep 24, 2023 1:55 am
Forum: Tuba and Titan Pro-Sound Subwoofers
Topic: Maximum horn
Replies: 11
Views: 2522

Re: Maximum horn

You are correct but I do believe Butterworth is -3db at the crossover point LR is -6db. When you sum two Butterworth filters there will be added gain at the crossover frequency that may or may not need to be balanced. I think what's happening here is the stack is still horn loaded down to below 30h...
by Grant Bunter
Sat Sep 23, 2023 9:02 pm
Forum: Tuba and Titan Pro-Sound Subwoofers
Topic: Maximum horn
Replies: 11
Views: 2522

Re: Maximum horn

IIRC, 4th order Butterworth is 24dB/octave.
So your readings are a little higher than what you would expect.
It's still great to see that result though.

Nice!
by Grant Bunter
Sat Sep 23, 2023 5:14 pm
Forum: DR Horn Loaded Bass/Keyboard/PA Speakers
Topic: DR build questions
Replies: 108
Views: 475357

Re: DR build questions

So central on the vertical plane? Whatever blows your hair back really. My first pair of 250's have the plate mounted centrally and horizontally. My second set, the plate is mounted vertically and centred about 1/3 of the way up from the bottom. Don't forget to add a couple of reinforcing strips to...
by Grant Bunter
Fri Sep 22, 2023 5:16 pm
Forum: DR Horn Loaded Bass/Keyboard/PA Speakers
Topic: DR build questions
Replies: 108
Views: 475357

Re: DR build questions

Greetings all, On page 14 of hifibobs T60 & DR280 build thread https://billfitzmaurice.info/forum/viewtopic.php?t=19854&start=195 He uses a bit in the drill press to create a pocket style relief in the module for the mounting screws, what type of bit is it? Is it the pocket guide bit, or a ...
by Grant Bunter
Fri Sep 22, 2023 4:39 pm
Forum: Build Threads
Topic: T39: 4 x 20", 2 x 28" completed
Replies: 82
Views: 64560

Re: T39: 4 x 20", 2 x 28" completed

Keryn O'Shea wrote: Fri Sep 22, 2023 4:15 am Ah Roger, I've lost all my 10mm sockets, and if I need an angle guide, I'll pop over and borrow/lose yours mate!
Haha, welcome any time!
by Grant Bunter
Thu Sep 21, 2023 4:20 pm
Forum: Home Theatre/Stereo/Auto Sound
Topic: TLAH line array for church
Replies: 6
Views: 740

Re: TLAH line array for church

Is the TLAH line array 6 mid and 9 tweeters good to use in a very small church? The file states for 9 feet and greater, use the 6x9 version. Yes, TLAH would be great. The church volume is 10' wide by 30' depth by 8' high. What small sub-woofer will work for this room size? Sort of impossible to ans...
by Grant Bunter
Wed Sep 20, 2023 8:53 pm
Forum: Build Threads
Topic: T39: 4 x 20", 2 x 28" completed
Replies: 82
Views: 64560

Re: T39: 4 x 20", 2 x 28" completed

For this revision, I nominate them MVT: Most Victorious Triumph.. My Victory Trick..? Most valuable tool man. Just like a 10mm socket. Or that digital angle guide I keep telling you to pick up :) I've always wondered if there is a router template bit that cuts, say 1/16" more with a bearing gu...
by Grant Bunter
Mon Sep 18, 2023 5:14 pm
Forum: Tuba and Titan Pro-Sound Subwoofers
Topic: T48 drivers
Replies: 13
Views: 1943

Re: T48 drivers

I do live bands indoors and out. I'll keep you guys updated. It's not the same cab, but the difference inbetween my 20" wide T39's and 28" wide T39's is astounding. So it's good advice to build wider (indeed, as wide a possible). I don't know if you pull a trailer around, but if not, time...
by Grant Bunter
Sun Sep 17, 2023 12:54 am
Forum: Build Threads
Topic: T39: 4 x 20", 2 x 28" completed
Replies: 82
Views: 64560

Re: T39: 4 x 20", 2 x 28" completed

Got to finishing these off today! Driver breakin: 20230911_141802.jpg I didn't have to cut the baffle out for the last 2 cabs. I found these circular 60 grit flap disks, which let me enlarge the driver spacing without removing the baffle. For this revision, I nominate them MVT: 20230915_103842.jpg L...
by Grant Bunter
Sat Sep 09, 2023 3:45 pm
Forum: Build Threads
Topic: T39: 4 x 20", 2 x 28" completed
Replies: 82
Views: 64560

Re: T39: 4 x 20", 2 x 28" completed

I like your "fix" Grant! I have BP102s in my 20" T39s and someday I might go with the 3012s. I hadn't quite figured out how I was going to do it but, after seeing yours, I now know how I will do it. Yee haw! Good work you done did. Tom, I think you would have to approach it different...
by Grant Bunter
Fri Sep 08, 2023 10:04 pm
Forum: Build Threads
Topic: T39: 4 x 20", 2 x 28" completed
Replies: 82
Views: 64560

Re: T39: 4 x 20", 2 x 28" completed

Seth wrote: Fri Sep 08, 2023 9:10 pm :clap:
Well done. It's amazing how good the cabs look after that much time. They look brand new!
Regular coats of paint fixes the appearance.
Can't say the same for the insides checking drivers etc...
by Grant Bunter
Fri Sep 08, 2023 5:48 pm
Forum: Build Threads
Topic: T39: 4 x 20", 2 x 28" completed
Replies: 82
Views: 64560

Re: T39: 4 x 20", 2 x 28" completed

Sorry, they're not in order, but top to bottom pics wise: 4 x KL301LF's to me. After the mod. Corner pieces of 1/4" ply as supports. Baffle enlargement completed and blocks applied. Radical Surgery. Baffle mod jigs with driver in place. Inner basket top, outer basket bottom. Pulled driver for t...
by Grant Bunter
Fri Sep 08, 2023 5:28 pm
Forum: Build Threads
Topic: T39: 4 x 20", 2 x 28" completed
Replies: 82
Views: 64560

Re: T39: 4 x 20", 2 x 28" completed

Well, another update! In this thread: https://billfitzmaurice.info/forum/viewtopic.php?t=26498 I asked about increased output by replacing the original BP102's in my 20" wide T39's with KL3010LF's. While the output wouldn't increase phenomenally, the advantage of being able to set and forget a ...
by Grant Bunter
Wed Sep 06, 2023 4:54 pm
Forum: Tips, Techniques and Supplier Links
Topic: Australian Options - Suppliers / Drivers etc
Replies: 176
Views: 378623

Re: Australian Options - Suppliers / Drivers etc

In this thread it's mentioned the Penn Elcom 1105 handle projection into the horn path of a DR280 isn't an issue, is this still valid? Pros/Cons of fitting them above or below the horn side braces? Sketchup shows them below. https://billfitzmaurice.info/forum/viewtopic.php?p=30429&hilit=DR280+h...