Search found 469 matches
- Tue Sep 27, 2016 9:57 am
- Forum: Educational Links
- Topic: Horn non-linearity frequency dependent
- Replies: 11
- Views: 5185
Re: Horn non-linearity frequency dependent
Edit: I've found a plan of attack for a redesign. I'm removing this data as a result. We can close this thread.
- Mon Sep 26, 2016 9:34 pm
- Forum: Educational Links
- Topic: Horn non-linearity frequency dependent
- Replies: 11
- Views: 5185
Re: Horn non-linearity frequency dependent
According to the sim that shouldn't be the case, not even close, excursion should be within klippel XMAX to full output. Then what's the problem? If the sim has all the answers, what does the real world matter? Work the problem. Keep investigating. Don't debate the data. I know the excursion isn't ...
- Mon Sep 26, 2016 9:33 am
- Forum: Educational Links
- Topic: Horn non-linearity frequency dependent
- Replies: 11
- Views: 5185
Re: Horn non-linearity frequency dependent
You can believe the sim or you can believe the actual results. Not that the sim is necessary wrong, but if the data entry isn't right, or the translation from simulation to plywood isn't right, then the sim prediction will be off. The measured impedance curve and frequency response (at 2.83V) match...
- Mon Sep 26, 2016 9:10 am
- Forum: Educational Links
- Topic: Horn non-linearity frequency dependent
- Replies: 11
- Views: 5185
Re: Horn non-linearity frequency dependent
According to the sim that shouldn't be the case, not even close, excursion should be within klippel XMAX to full output.Bill Fitzmaurice wrote:The driver has reached xmax.MissileCrisis wrote:beyond a certain input threshold the response from 40-50 hz sucks out (compresses) almost completely, as in more input = same output.
- Mon Sep 26, 2016 8:47 am
- Forum: Educational Links
- Topic: Horn non-linearity frequency dependent
- Replies: 11
- Views: 5185
Re: Horn non-linearity frequency dependent
Driver, horn length (or hornresp inputs) would be helpful. Materials of construction and bracing amount would also be helpful. Voltage compression occurs would help.[/quote] Baltic birch with as much if not more bracing as Bill recommends for his subwoofers (bracing spaced every 6 inches throughout ...
- Sun Sep 25, 2016 11:47 pm
- Forum: Educational Links
- Topic: Horn non-linearity frequency dependent
- Replies: 11
- Views: 5185
Horn non-linearity frequency dependent
Hello, so I have a horn subwoofer question that has recently come up due to some measurements I've made with a horn loaded subwoofer I designed. Basically, beyond a certain input threshold the response from 40-50 hz sucks out (compresses) almost completely, as in more input = same output. The enclos...
- Wed Jul 01, 2015 4:38 pm
- Forum: YouTube Links
- Topic: T60 with a pair of custom top speakers using a measurement Mic
- Replies: 0
- Views: 17994
T60 with a pair of custom top speakers using a measurement Mic
Here is a recording with the sub set to ~+3 dB from the midrange. Song changes around to give different music styles.
https://www.youtube.com/watch?v=Ki2x_uG ... e=youtu.be
Song names in video.
Roughly 15-20 dB of headroom throughout the video.
https://www.youtube.com/watch?v=Ki2x_uG ... e=youtu.be
Song names in video.
Roughly 15-20 dB of headroom throughout the video.
- Sun Sep 07, 2014 6:04 pm
- Forum: Build Threads
- Topic: New THT build in Wisconsin
- Replies: 60
- Views: 11785
Re: New THT build in Wisconsin
There are listening positions in my room that look like my t60 is high passed around 35 hz, move to a different spot and monstrous lf, trust me when I say it's the room. Have fun moving the sub around such that the most even response is at your listening position as all small heck even medium rooms ...
- Sun Sep 07, 2014 2:42 am
- Forum: Build Threads
- Topic: New THT build in Wisconsin
- Replies: 60
- Views: 11785
Re: New THT build in Wisconsin
For the love of god don't play music through it before you stain it, it will never leave the house I love my T60 so being without a sub for 2 days while I painted it was tough. Best solution is have another BFM sub to tie you over (in case you ever decide you need 2 of these monsters).
- Sun Sep 07, 2014 2:38 am
- Forum: Build Threads
- Topic: New THT build in Wisconsin
- Replies: 60
- Views: 11785
Re: New THT build in Wisconsin
Made a crude jig for my RotoZip since I can't seem to find one of those router hole cutting templates. http://i1284.photobucket.com/albums/a579/howiez69/THT1/IMG_4128_zpsaa89b0b0.jpg It works, not as clean / square as a router, but not bad, only 1/8" kerf if you can call it that. http://i1284....
- Sun Sep 07, 2014 2:31 am
- Forum: Build Threads
- Topic: OTop12 and T45
- Replies: 15
- Views: 4124
Re: OTop12 and T45
Don't forget to include the braces in your sheet layout, especially if doubling up on them. Definitely going to need to grab some more wood for this! Really diggin' the Cerwin Vega style bracing. Would like to use 3/8" if I go this route, or more Arauco. Now I just need to figure out how to br...
- Sun Sep 07, 2014 2:21 am
- Forum: Build Threads
- Topic: T39 20"
- Replies: 37
- Views: 6044
Re: T39 20"
Initially I'm ordering just a single 3012 driver, the speakon jacks and a pair of casters so I can get the cutouts right. I'll order the rest of the hardware later in the build process when it's relevant. Maybe I'll be less tempted to rush when I don't have boxes of pretty parts just begging to be ...
- Sun Sep 07, 2014 2:14 am
- Forum: Build Threads
- Topic: The start: 6 x T30's @ 24"
- Replies: 68
- Views: 13421
Re: The start: 6 x T30's @ 24"
Let me get this straight: you built a T30 from start to finish in 4 days. That's mighty impressive, took me 3 weeks to do my T60 (albeit was working nights and weekends). I've resorted to simpler builds Such that I can knock out a build a week (nothing like a 7 panel + bracing/corner simple TH for s...
- Sun Sep 07, 2014 2:04 am
- Forum: Build Threads
- Topic: Truck Tuba by a Teenager
- Replies: 32
- Views: 8465
Re: Truck Tuba by a Teenager
Right? I can't believe it's been almost 3 years since I built my first horn-loaded box. I think the TrT is going to be a good all-around sub. Not for HT and not for an outdoor concert, but perfect for daily listening and small house parties. I've lived in the dorms, two different ones-- been in a h...
- Tue Sep 02, 2014 2:44 pm
- Forum: Reviews
- Topic: BFM vs. JBL/DAS
- Replies: 5
- Views: 3273
Re: BFM vs. JBL/DAS
If I ever do outdoor gigs I will recommend having 140+ dB sub potential (theoretical) on tap such that you can run a solid 115+ in the middle of the crowd with 3 dB + of headroom. For my custom boxes that would be 8 subs or roughly ~70 cu. ft. worth. Of course then you need roughly 8kwatts but that'...