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post #61 of 515 Old 01-20-2012, 08:40 PM - Thread Starter
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Quote:
Originally Posted by Scott Simonian View Post


http://www.avsforum.com/avs-vb/showt...7#post21507917

I know the thread but just see ssd and xxx mentioned
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post #62 of 515 Old 01-20-2012, 08:52 PM
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Did you click on the link I provided and read it? It's Ricci's post where there is a measured UXL-18.

My Dual 18" LLT subs 120dB down to 10hz

 

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post #63 of 515 Old 01-21-2012, 04:45 AM - Thread Starter
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Quote:
Originally Posted by Scott Simonian View Post

Did you click on the link I provided and read it? It's Ricci's post where there is a measured UXL-18.

Scott,

For some reason my viewer app on my droid wasn't taking me to that post. On a regular desktop it is working now.

Okay, now that I see that, does that mean I made a good choice?

I'm not versed in the inductance talk.....

By the way, Desertdome came over yesterday, we got the MFW15s measured with the seaton modded SA1000 with a room and close mic, with the regular dayton, room, close mic, L/T, and L/T with REW filters.

Pretty interesting. Desertdome is like a REW wizard.

I'll try and make a thread on those sometime.

We also played with mains and leveling the db with the subs. Funny what happens when you don't run subs hot at all. WHERE are they?
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post #64 of 515 Old 01-23-2012, 11:01 AM
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Did you guys get the cabinets opened up for the 18s?

Larry
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post #65 of 515 Old 01-23-2012, 11:48 AM - Thread Starter
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Quote:
Originally Posted by 04FLHRCI View Post

Did you guys get the cabinets opened up for the 18s?

Larry

We probably wouldn't have had time-but decided not to anyways...a couple things:

My FP14k amp is currently dead. Since it is Chinese New Year I won't be hearing back until the end of the month it sounds like on how they want me to proceed.

The other thing is my second UXL that I got in has a rub internally in the voice coil. I am going to run a 20hz sine wave through it with the dayton sa1000 here tomorrow or tonight and see if I can get rid of the rub or however that has worked for people in the past. If not I'll have to troubleshoot this with Mark on what to do. A few of the MFWs we had in the dual opposed rub a bit and one was in the recent GTG and nobody seems to have noticed, but I'd prefer to not have a driver do that.

I'll post what happens there.

We measured the MFW15 dual opposed and amp variants and I'll post that in the KC GTG thread in the subwoofer forum soon.

Once I get two satisfactory drivers, I'll be cutting into the boxes.
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post #66 of 515 Old 01-23-2012, 11:53 AM
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If the coil is misaligned, then running a 20hz sinewave sweep through it will do nothing except rub off the coating on the wire, and cause other issues. I would talk to Mark and see what he says before proceeding.

"You take the blue pill - the story ends, you wake up in your bed and believe whatever you want to believe. You take the red pill - you stay in Wonderland and I show you how deep the rabbit-hole goes."
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post #67 of 515 Old 01-23-2012, 02:07 PM - Thread Starter
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Quote:
Originally Posted by michael hurd View Post

If the coil is misaligned, then running a 20hz sinewave sweep through it will do nothing except rub off the coating on the wire, and cause other issues. I would talk to Mark and see what he says before proceeding.

This is what Mark told me to do, on low levels.
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post #68 of 515 Old 01-23-2012, 02:38 PM
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Don't put the driver cone side down even on the carpet! You're dimpling the surround.
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post #69 of 515 Old 01-23-2012, 02:56 PM
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Quote:
Originally Posted by LINEARX View Post

Don't put the driver cone side down even on the carpet! You're dimpling the surround.

I always cringe when I see pictures like that.

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post #70 of 515 Old 01-23-2012, 03:08 PM - Thread Starter
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Quote:
Originally Posted by LINEARX View Post

Don't put the driver cone side down even on the carpet! You're dimpling the surround.

So don't put it cone down on cement with marbles inside the cone and cell phones stuck around the magnet?


---Oh, sorry, now I realize you were talking about the pictures. I did that just for the pictures for like a minute or two.

But, yeah I'll make sure not to do that anymore! I was more worried about my 2 year old at the time not throwing a baseball into the cone, so turning it on its face to snap pictures made sense.

But yeah, I get how the weight of the whole thing on the surround might be bad.


First time DIY here.
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post #71 of 515 Old 01-23-2012, 03:59 PM
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The rub could also be a bit of glue. My second replacement mal-x 21" had a slighht rub when I got it. after about 30 seconds of low power 20hz signal, it went away. Kevin told me to do the same thing as Mark.

Blasting brown notes for 10 years and counting!

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post #72 of 515 Old 01-24-2012, 02:04 PM - Thread Starter
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Using the Dayton SA1000 I ran a short 5 second 15hz and 20hz sine wave from REW at -20 dbs a couple times. Rythmic noise, driver and spiders moving.

I'm not sure what glue sounds like, but this sounds like metal on metal at a high rate of speed slightly clicking together. Damn.

Emailed Mark the videos. I'd post them here but they are a bit big. Anyone know where they can be hosted...?
LL
LL
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post #73 of 515 Old 01-24-2012, 02:06 PM
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Quote:
Originally Posted by HuskerOmaha View Post

Emailed Mark the videos. I'd post them here but they are a bit big. Anyone know where they can be hosted...?

There's this awesome site called youtube
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post #74 of 515 Old 01-24-2012, 02:15 PM - Thread Starter
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There's this awesome site called youtube

killin me. I should probably join.
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post #75 of 515 Old 01-24-2012, 02:35 PM - Thread Starter
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post #76 of 515 Old 01-24-2012, 02:37 PM
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Quote:
Originally Posted by HuskerOmaha View Post

Using the Dayton SA1000 I ran a short 5 second 15hz and 20hz sine wave from REW at -20 dbs a couple times. Rythmic noise, driver and spiders moving.

I'm not sure what glue sounds like, but this sounds like metal on metal at a high rate of speed slightly clicking together. Damn.

Emailed Mark the videos. I'd post them here but they are a bit big. Anyone know where they can be hosted...?

The metallic clacking sound happened on my maelstrom, and it got worse over time. Look in my thread on the first page to look for a video link.

I ended up ripping my driver apart and now I'm looking for a new one.
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post #77 of 515 Old 01-24-2012, 09:00 PM
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Man, we're low on options for drivers, and the current players who have products to ship are struggling with QC challenges.

I'm hoping Mark gets these issues resolved (is he building these in-house?) promptly as I'd rather go with 4 of these as compared to 2 LMS Ultras.

Although, for 'nearly' the same coin a guy could pick up 16 of the Dayton HF drivers...hmm, I need to see how that models...lol

I was really excited for you as we headed into the weekend; sorry about the amp and the driver

Larry
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post #78 of 515 Old 01-24-2012, 09:15 PM
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Quote:
Originally Posted by HuskerOmaha View Post

What would I do without notnyt holding my hand.

15 hz sine UXL-18

20 hz sine UXL-18

Diagnose me

Ouch. Houston, we have a major malfunction.

Sounds like hard parts hitting hard parts.

Was the cone moving at all (not evident in the video)?

Does the cone move freely if you push it with your hand?
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post #79 of 515 Old 01-25-2012, 06:02 AM - Thread Starter
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Mark had me try a few things at 15 hz. I went around the spider pressing in. for roughly 1/5 around the spider, directly to the right of the terminals, I could press in a cm or so and make it go away. But as the gain was turned up....60 dbs free air at 15 hz...good excursion it returns.

Pushing freely favoring the side by the terminals on the cone, not really any audible sound. push down on the cone from opposite side, tons of inner contact.

did all the experimentation with the cone facing vertical sitting on magnet. didn't try horizontally...

relayed all this to mark.

He is going to have it brought back. Even Fedex can't help but rough something up.
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post #80 of 515 Old 01-25-2012, 06:07 AM - Thread Starter
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Sanway just emailed me. Sounds like they want to send me instructions and find an electrical engineer.

This project is fast becoming interesting.
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post #81 of 515 Old 01-25-2012, 09:37 AM
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Quote:
Originally Posted by 04FLHRCI View Post

Although, for 'nearly' the same coin a guy could pick up 16 of the Dayton HF drivers...hmm, I need to see how that models...lol

Not a bad choice if you have the room for all those.

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post #82 of 515 Old 01-25-2012, 09:50 AM
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Hi Scott,

Perhaps I should consider; I do have the room:

8 behind the AT screen lined-up across the bottom.
4 in dual-opposed placed at the mid-point of each side wall.
4 in dual-opposed placed in the back of the room as measurements dictate.

If we don't see improvements with some of the shipping/QC challenges by end of February; you'll see a new 15" x 16 thread

I was planning on 3 Mael-X 21s, and have the cabinets ready to roll; I'm going to inquire with Mark about his 21s and see if I can participate in the current build-out. Although, shipping/QC has me spooked at the moment

Larry
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post #83 of 515 Old 01-25-2012, 10:13 AM
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Quote:
Originally Posted by 04FLHRCI View Post

Hi Scott,

Perhaps I should consider; I do have the room:

8 behind the AT screen lined-up across the bottom.
4 in dual-opposed placed at the mid-point of each side wall.
4 in dual-opposed placed in the back of the room as measurements dictate.

Larry

That ... sounds.... awesome! Do it!

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post #84 of 515 Old 01-25-2012, 10:27 AM
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do you have a warranty on the pi driver? If not, I would start looking for a surround kit and re-align the voicecoils. It's really easy to do once you've seen it done or done it once yourself. Just tedious and time consuming. When I realign or refoam speakers it generally takes me an hour per driver to do.
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post #85 of 515 Old 01-25-2012, 10:55 AM
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He just received the speaker in this condition, so obviously the MFR will have to take care of it.
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post #86 of 515 Old 01-25-2012, 11:03 AM
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No offense to any of the involved parties, but I recommend getting a full refund on the Mach5 18s, and trying to get a refund or reshipment from Sanway. It's a little excessive for Sanway to be recommending you get an electrical engineer for a product that was faulty upon delivery, though that is the risk you run with OEM equipment, especially stuff that implicitly comes with zero support. Even though I mentioned this before privately, I think it bears repeating.

There's no reason for vendors to oversell and under-deliver if they want to stick around. The whole thing about these Mach5 drivers first being packaged poorly, then being unavailable for a long time (still?), then shipping two weeks later than quoted to you with multiple excuses, then having significant manufacturing defects upon arrival, has me spooked. You'd expect the few drivers that have trickled out to at least be right...I hope the sound in those videos wasn't the death knell for another line of subs, but it's not looking good, regardless of the manufacturer's reputation.

Time to cut your losses, in my opinion. Go a different direction, and stop shooting for bragging rights with ultra-expensive equipment or total overkill. I think you can accomplish what you want to do now while also future-proofing with a less expensive and easier to move, dual opposed 15" setup, non-OEM amps, and DSP + L/T. Or hell, for the time being, keep the existing setup from desertdome. It seems to be treating you pretty well.
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post #87 of 515 Old 01-25-2012, 06:05 PM
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Quote:
Originally Posted by LINEARX View Post

Don't put the driver cone side down even on the carpet! You're dimpling the surround.

Haha, are you trolling?

You guys are crazy....
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post #88 of 515 Old 01-25-2012, 06:15 PM
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Quote:
Originally Posted by nube View Post

No offense to any of the involved parties, but I recommend getting a full refund on the Mach5 18s, and trying to get a refund or reshipment from Sanway. It's a little excessive for Sanway to be recommending you get an electrical engineer for a product that was faulty upon delivery, though that is the risk you run with OEM equipment, especially stuff that implicitly comes with zero support. Even though I mentioned this before privately, I think it bears repeating.

There's no reason for vendors to oversell and under-deliver if they want to stick around. The whole thing about these Mach5 drivers first being packaged poorly, then being unavailable for a long time (still?), then shipping two weeks later than quoted to you with multiple excuses, then having significant manufacturing defects upon arrival, has me spooked. You'd expect the few drivers that have trickled out to at least be right...I hope the sound in those videos wasn't the death knell for another line of subs, but it's not looking good, regardless of the manufacturer's reputation.

Time to cut your losses, in my opinion. Go a different direction, and stop shooting for bragging rights with ultra-expensive equipment or total overkill. I think you can accomplish what you want to do now while also future-proofing with a less expensive and easier to move, dual opposed 15" setup, non-OEM amps, and DSP + L/T. Or hell, for the time being, keep the existing setup from desertdome. It seems to be treating you pretty well.

No problem friend, don't buy them. It's that simple

We do not have QC issues here. When the driver shipped it exhibited no issue whatsoever. Take a step back and think about this - What benefit would it be for us to send out a defective driver, only to pay for the shipping back to our shop, spend time examining it to determine the cause, fix/replace and then ship back?

Let's apply some logic here guys.

I will not comment on this again. Husker, we will move forward with the process once I confirm things with FedEx.

Best,
Mark

You guys are crazy....
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post #89 of 515 Old 01-25-2012, 06:53 PM
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It's nice to know you're taking care of things. The vendors we have on this forum seem to do that well at least

I can't believe how abusive shipping is, but at the same time, big magnet, heavy box, lazy drivers. I received at least two maelstrom's that were damaged in shipping. One had the basket completely cracked, and others bent. I was able to bend the others back, but no rescuing a cracked basket.

The LMS drivers I received were all good, but they ship the motors separate to prevent damage. Surprised nobody else is doing this.
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post #90 of 515 Old 01-25-2012, 07:05 PM
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About time cyborgs start delivering our packages. It's the 21st century. Let's get on that.

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