What's to chat about?

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Bruce Weldy
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Re: What's to chat about? Supertonic

#706 Post by Bruce Weldy »

Tom Smit wrote: Tue Sep 22, 2020 11:14 pm I just learned about the supertonic https://www.youtube.com/watch?v=tR32h5j ... QpFEJRk2Zw
I, also, learned that "The Weekend" has a number of songs that have the same melody (it's in the video).
I found the video interesting......however, I have never heard a single song that he played.....

6 - T39 3012LF
4 - OT12 2512
1 - T24
1 - SLA Pro
2 - XF210


"A system with a few knobs set up by someone who knows what they are doing is always better than one with a lot of knobs set up by someone who doesn't."

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Seth
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Re: What's to chat about? Supertonic

#707 Post by Seth »

Bruce Weldy wrote: Wed Sep 23, 2020 7:54 am
Tom Smit wrote: Tue Sep 22, 2020 11:14 pm I just learned about the supertonic https://www.youtube.com/watch?v=tR32h5j ... QpFEJRk2Zw
I, also, learned that "The Weekend" has a number of songs that have the same melody (it's in the video).
I found the video interesting......however, I have never heard a single song that he played.....
Two lessons in one! What a bargain! LOL
Build in process - 2 WH6, one Alpha 6a loaded, one PRV Audio 6MB250-NDY loaded

Two 2x6 shorty SLA Pro's
One T39, 16", 3012LF loaded
Tall AutoTuba, 20" wide, 2x 8" MCM 55-2421
TruckTuba, 8½" wide, 2x 8" MCM 55-2421

Bruce Weldy
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Re: What's to chat about? Supertonic

#708 Post by Bruce Weldy »

SethRocksYou wrote: Wed Sep 23, 2020 9:40 am
Bruce Weldy wrote: Wed Sep 23, 2020 7:54 am
Tom Smit wrote: Tue Sep 22, 2020 11:14 pm I just learned about the supertonic https://www.youtube.com/watch?v=tR32h5j ... QpFEJRk2Zw
I, also, learned that "The Weekend" has a number of songs that have the same melody (it's in the video).
I found the video interesting......however, I have never heard a single song that he played.....
Two lessons in one! What a bargain! LOL
Unfortunately, the second lesson was - new music really sucks. Its only redeeming value is that it has made disco more palatable on the suckiness scale. :mrgreen:

6 - T39 3012LF
4 - OT12 2512
1 - T24
1 - SLA Pro
2 - XF210


"A system with a few knobs set up by someone who knows what they are doing is always better than one with a lot of knobs set up by someone who doesn't."

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Seth
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Re: What's to chat about?

#709 Post by Seth »

DANG you guys! If it stays this slow around here, I'm just going to have to take matters into my own hands and complete the four 30" T39's I have sitting here in piles of pre cut plywood panels. :cussing:
Build in process - 2 WH6, one Alpha 6a loaded, one PRV Audio 6MB250-NDY loaded

Two 2x6 shorty SLA Pro's
One T39, 16", 3012LF loaded
Tall AutoTuba, 20" wide, 2x 8" MCM 55-2421
TruckTuba, 8½" wide, 2x 8" MCM 55-2421

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Seth
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Re: What's to chat about?

#710 Post by Seth »

Hey Bill, I had a random curiosity. The splay angles that the DR's are designed with, I noticed they're all different. Is that angle chosen based on how they stack, to create a particular curve for a certain stack height? Or, does it have something to do with creating the horn flare (not sure if that's the correct term) to attain the desired response? Or... something completely different?
Build in process - 2 WH6, one Alpha 6a loaded, one PRV Audio 6MB250-NDY loaded

Two 2x6 shorty SLA Pro's
One T39, 16", 3012LF loaded
Tall AutoTuba, 20" wide, 2x 8" MCM 55-2421
TruckTuba, 8½" wide, 2x 8" MCM 55-2421

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Chris_Allen
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Re: What's to chat about?

#711 Post by Chris_Allen »

It is probably to create the correct mouth area in relation to the throat.
Built:
6xDR200, 2xT39, 2xT48, 2xJack110, 1xOmni10.5, 1xAutotuba, 1xT18, 1xSLA Pro, 1xW8, 1xW10

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Seth
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Re: What's to chat about?

#712 Post by Seth »

Chris_Allen wrote: Thu Oct 15, 2020 5:17 am It is probably to create the correct mouth area in relation to the throat.
I though it may also have something to do with that whole parallel surfaces anomaly thing too. Dunno. Oh well.

Do I recall correctly that you put two DR200's together in about 12 hours start to finish?
Build in process - 2 WH6, one Alpha 6a loaded, one PRV Audio 6MB250-NDY loaded

Two 2x6 shorty SLA Pro's
One T39, 16", 3012LF loaded
Tall AutoTuba, 20" wide, 2x 8" MCM 55-2421
TruckTuba, 8½" wide, 2x 8" MCM 55-2421

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Strange Kevin
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Re: What's to chat about?

#713 Post by Strange Kevin »

12 hours Start to finish Dr200????

Well, call me impressed!
I'd love to see a time laps of that! :)

When I build some DRs its more like 12 days, not hours!
Authorized Builder - Phoenix AZ.
Main Rig - 6 DR200s - 6 T48s (30")
SLA Pros for the smaller stuff.

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Seth
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Re: What's to chat about?

#714 Post by Seth »

Are any of you guys following Wintergaten - Martin Molen's build series of the MMX (Marble Machine X) on YouTube? It's absolutely incredible from so many aspects. Engineering, woodworking, personal development, overcoming obstacles, organization, and more.

It's a build series of the new and improved version of this:

Build in process - 2 WH6, one Alpha 6a loaded, one PRV Audio 6MB250-NDY loaded

Two 2x6 shorty SLA Pro's
One T39, 16", 3012LF loaded
Tall AutoTuba, 20" wide, 2x 8" MCM 55-2421
TruckTuba, 8½" wide, 2x 8" MCM 55-2421

NukePooch
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Re: What's to chat about?

#715 Post by NukePooch »

SethRocksYou wrote: Thu Oct 29, 2020 3:43 pm Are any of you guys following Wintergaten - Martin Molen's build series of the MMX
I check in on occasion, but because he keeps ripping it apart for the 58th time, I don't watch all the videos...I'm more of a 'check in every quarter and see what he's tearing apart now' kind of viewer...If/when he completes it, it will be absolutely incredible/insane!
Built:
4 Jack 112L- 3012HO, melded array
17.5 wide AutoTuba with Infinity 860w
6 Wedgehorn W6 w/ Panel Mount Piezos
2 T48 Slims (15" wide) with 3012LF
4 T48 Fattys (32" wide) with 3015LF

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Seth
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Re: What's to chat about?

#716 Post by Seth »

NukePooch wrote: Thu Oct 29, 2020 4:30 pm
SethRocksYou wrote: Thu Oct 29, 2020 3:43 pm Are any of you guys following Wintergaten - Martin Molen's build series of the MMX
I check in on occasion, but because he keeps ripping it apart for the 58th time, I don't watch all the videos...I'm more of a 'check in every quarter and see what he's tearing apart now' kind of viewer...If/when he completes it, it will be absolutely incredible/insane!
I look forward to Wednesday's for every update. They're not always enthralling and sometimes I'll stop one early if it's not holding my interest. But, I find it to be quality entertainment 95+% of the time.
Build in process - 2 WH6, one Alpha 6a loaded, one PRV Audio 6MB250-NDY loaded

Two 2x6 shorty SLA Pro's
One T39, 16", 3012LF loaded
Tall AutoTuba, 20" wide, 2x 8" MCM 55-2421
TruckTuba, 8½" wide, 2x 8" MCM 55-2421

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Seth
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Re: What's to chat about?

#717 Post by Seth »

Amplifier thought/question;

Two T39's and an amp rated 2x 150 @ 8ohm, 250 @ 4ohm, 500 bridged @ 8, RMS.

If brick wall limited to 45 volts and bridged into 4ohms, how likely is it that the amp would do so cleanly without going into any over-temp protect modes? (netting 250 per cab, instead of 125 if not bridged)
Build in process - 2 WH6, one Alpha 6a loaded, one PRV Audio 6MB250-NDY loaded

Two 2x6 shorty SLA Pro's
One T39, 16", 3012LF loaded
Tall AutoTuba, 20" wide, 2x 8" MCM 55-2421
TruckTuba, 8½" wide, 2x 8" MCM 55-2421

Grant Bunter
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Re: What's to chat about?

#718 Post by Grant Bunter »

SethRocksYou wrote: Tue Nov 17, 2020 3:11 pm Amplifier thought/question;

Two T39's and an amp rated 2x 150 @ 8ohm, 250 @ 4ohm, 500 bridged @ 8, RMS.

If brick wall limited to 45 volts and bridged into 4ohms, how likely is it that the amp would do so cleanly without going into any over-temp protect modes? (netting 250 per cab, instead of 125 if not bridged)
Ummm the specs don't say, from what you've given us, that you can put a 4 ohm load on the amp when bridged.
Plenty of amps are very picky about correct impedance loads in bridged mode and how they will behave...
Built:
DR 250: x 2 melded array, 2x CD horn, March 2012 plans.
T39's: 4 x 20" KL3010LF , 2 x 28" 3012LF.
WH8: x 6 with melded array wired series/parallel.
Bunter's Audio and Lighting "like"s would be most appreciated...

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Seth
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Re: What's to chat about?

#719 Post by Seth »

Grant Bunter wrote: Tue Nov 17, 2020 3:48 pm
SethRocksYou wrote: Tue Nov 17, 2020 3:11 pm Amplifier thought/question;

Two T39's and an amp rated 2x 150 @ 8ohm, 250 @ 4ohm, 500 bridged @ 8, RMS.

If brick wall limited to 45 volts and bridged into 4ohms, how likely is it that the amp would do so cleanly without going into any over-temp protect modes? (netting 250 per cab, instead of 125 if not bridged)
Ummm the specs don't say, from what you've given us, that you can put a 4 ohm load on the amp when bridged.
Plenty of amps are very picky about correct impedance loads in bridged mode and how they will behave...
You're right, the specs don't specify that it can. However... they also don't specify that it can't.

There are a lot of late model amps that are auto load sensing and internally regulate output based on the load impedance. I'm curious if it's likely that doing the task manually (via signal limiting) could also be effective.

Based on the nominal impedance, the difference in amperage in the circuit is 3.3 amperes, or about 42% increase from 500 watts at 8 ohms (7.9A @ 63.24V) and 500 watts at 4 ohms (11.2A @ 44.72V). I wonder how likely it is that the average amplifiers power supply and output transistors can cover the additional amperage. I'd imagine that the overall efficiency of the amplifier wouldn't change more than 5% or so. But, I really don't know all too much about amplifiers other than basic principals of operation.

Just a thought and consideration I had , that I thought was conversation worthy. What do you think? What's your gut or logic tell you?
Build in process - 2 WH6, one Alpha 6a loaded, one PRV Audio 6MB250-NDY loaded

Two 2x6 shorty SLA Pro's
One T39, 16", 3012LF loaded
Tall AutoTuba, 20" wide, 2x 8" MCM 55-2421
TruckTuba, 8½" wide, 2x 8" MCM 55-2421

Bruce Weldy
Posts: 8301
Joined: Fri Nov 27, 2009 11:37 am
Location: New Braunfels, TX

Re: What's to chat about?

#720 Post by Bruce Weldy »

Here's the short answer.....if the amp is 2 ohm capable per channel, then it can be bridged to 4 ohms. If it is only listed at 4 ohms capable per channel, then you can't bridge it to 4 ohms.....just 8.

A good example of this is the QSC GX series...they are good amps, but not 2 ohm capable, so no bridging to 4.

6 - T39 3012LF
4 - OT12 2512
1 - T24
1 - SLA Pro
2 - XF210


"A system with a few knobs set up by someone who knows what they are doing is always better than one with a lot of knobs set up by someone who doesn't."

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