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Search: Keyword(s): ; Posts Made By: michael hurd
Forum: DIY Speakers and Subs   10-22-2015, 03:39 PM
Replies: 280
Views: 13,901
Posted By michael hurd
Neodymium has many advantages, as do ferrite...

Neodymium has many advantages, as do ferrite motors in some applications.

Having a large thermal mass will allow the coil to handle larger amounts of power for longer periods, as it will take...
Forum: DIY Speakers and Subs   10-05-2015, 07:16 PM
Replies: 21
Views: 532
Posted By michael hurd
Is the motor magnetized? Apply something...

Is the motor magnetized?

Apply something ferrous to the side of the magnet or the backplate. If it does not stick at all, then yes, you have a magnet that somehow did not get charged.

I still...
Forum: DIY Speakers and Subs   10-05-2015, 05:23 PM
Replies: 21
Views: 532
Posted By michael hurd
I would also check to make sure that the coils...

I would also check to make sure that the coils are wired correctly. I have one subwoofer driver that the terminal polarity is backwards to the markings ( on only one of two coils! ), and if I hadn't...
Forum: DIY Speakers and Subs   10-05-2015, 05:15 PM
Replies: 21
Views: 532
Posted By michael hurd
I would try another RCA-XLR cable to rule that...

I would try another RCA-XLR cable to rule that out, perhaps of a different brand. If both ends unscrew, I would check the connections and take a picture to post on here.

Check the input level on...
Forum: DIY Speakers and Subs   10-05-2015, 04:53 PM
Replies: 21
Views: 532
Posted By michael hurd
Without more information it could be anything...

Without more information it could be anything from the output on the AVR ( I assume you have some sort of AV Receiver in the chain, to the cable connection to the amplifier.

Are you going from...
Forum: Area Home Theater Meets   07-31-2015, 03:06 PM
Replies: 197
Views: 4,280
Posted By michael hurd
Unfortunately, I can't make it this year. :(

Unfortunately, I can't make it this year. :(
Forum: DIY Speakers and Subs   07-29-2015, 08:27 PM
Replies: 17
Views: 276
Posted By michael hurd
You could do that, or use threaded rod to hold...

You could do that, or use threaded rod to hold the endcaps to each other, clamping the tube.
Forum: DIY Speakers and Subs   07-29-2015, 08:10 PM
Replies: 17
Views: 276
Posted By michael hurd
Ratchet straps will hold the sub together. On one...

Ratchet straps will hold the sub together. On one end you might use a board with a hole larger than the port and a few notches for the strap to sit in. On the other, you might use a few spacer blocks...
Forum: DIY Speakers and Subs   07-20-2015, 04:47 PM
Replies: 49
Views: 900
Posted By michael hurd
Just remember, speakers never get jealous of...

Just remember, speakers never get jealous of other speakers. ;)

I have to echo what's been said here already. It takes an incredible amount of reading / designing / measuring of post build to...
Forum: DIY Speakers and Subs   07-10-2015, 06:43 PM
Replies: 38
Views: 983
Posted By michael hurd
http://www.avsforum.com/forum/155-diy-speakers-sub...

http://www.avsforum.com/forum/155-diy-speakers-subs/1516234-8x-18-lms-5400-ultras-sealed-27-cube-15hz-ported-build.html

notnyt (http://www.avsforum.com/forum/members/8064968-notnyt.html) went with...
Forum: DIY Speakers and Subs   07-10-2015, 06:12 PM
Replies: 28
Views: 598
Posted By michael hurd
I would likely skip the 600, unless it's real...

I would likely skip the 600, unless it's real bad. Always start with a finer grit, if it takes out the defects then there is less work polishing it out, compared to trying to remove a coarser sand...
Forum: DIY Speakers and Subs   07-10-2015, 05:28 PM
Replies: 28
Views: 598
Posted By michael hurd
BTHz, if you truly want mirror finish, you are...

BTHz, if you truly want mirror finish, you are going to have to do some sanding and polishing with a machine. You CAN do it by hand, but beware, it's very labor intensive without a buffer.

If you...
Forum: DIY Speakers and Subs   07-10-2015, 05:14 PM
Replies: 38
Views: 983
Posted By michael hurd
I have co-located sonotubes near my screen, and...

I have co-located sonotubes near my screen, and my room is almost the same size as yours, as well similar construction. ( basement )

I have enough output that the screen bounces, but tactile feel...
Forum: DIY Speakers and Subs   06-28-2015, 10:48 PM
Replies: 19
Views: 416
Posted By michael hurd
The torque on the baffle exerted by the weight of...

The torque on the baffle exerted by the weight of the magnetic assembly can be calculated. ;)
Forum: DIY Speakers and Subs   06-28-2015, 03:23 PM
Replies: 19
Views: 416
Posted By michael hurd
Unless you plan to get into an automobile...

Unless you plan to get into an automobile collision, or drop the box down a flight of stairs, normal coarse thread wood screws will hold the woofer in the baffle.

Double up the front baffle if...
Forum: DIY Speakers and Subs   06-28-2015, 10:07 AM
Replies: 75
Views: 1,544
Posted By michael hurd
Not that particular B&C, but I have heard the...

Not that particular B&C, but I have heard the 12NDL76 in a horn, and it measured well, with no anomalies.

Keep in mind that there is a ferrite magnet version with the same cone assembly, and it...
Forum: DIY Speakers and Subs   06-27-2015, 12:41 PM
Replies: 75
Views: 1,544
Posted By michael hurd
http://www.mcsquared.com/wavelength.htm

http://www.mcsquared.com/wavelength.htm
Forum: DIY Speakers and Subs   06-18-2015, 09:25 PM
Replies: 17
Views: 415
Posted By michael hurd
Depends where you are located, but this one was...

Depends where you are located, but this one was highly recommended.

http://www.tapeease.com/
Forum: DIY Speakers and Subs   06-15-2015, 03:23 PM
Replies: 177
Views: 4,114
Posted By michael hurd
I asked for a quote for the heck of it around 8...

I asked for a quote for the heck of it around 8 pm last night. I got an email reply at 3:08 am, about 7 hours after I asked. There was no mention of if that was a shipped price.

This is the...
Forum: DIY Speakers and Subs   06-15-2015, 12:48 PM
Replies: 177
Views: 4,114
Posted By michael hurd
Merrysound Fp14000 = $810, as per email from Amy...

Merrysound Fp14000 = $810, as per email from Amy Song.

Ms Amy Song
Melody Industry Co., Limited.
Add: No. 122, DongHuan Road , ShiQiao Town , PanYu District,
GuangZhou City , GuangDong...
Forum: DIY Speakers and Subs   05-20-2015, 05:35 PM
Replies: 97
Views: 3,508
Posted By michael hurd
X= Al coil H= Cu coil

X= Al coil
H= Cu coil
Forum: DIY Speakers and Subs   04-19-2015, 03:56 PM
Replies: 53
Views: 894
Posted By michael hurd
Can you remove the driver and test it in free...

Can you remove the driver and test it in free air? That would isolate if there is a loose piece inside the horn making the noise. If you set the woofer on it's back, blocking the pole vent, it will...
Forum: DIY Speakers and Subs   04-14-2015, 08:41 PM
Replies: 147
Views: 14,798
Posted By michael hurd
LTD02, this link might clear up your confusion....

LTD02, this link might clear up your confusion. It goes on to state what the differences are.... there are different rules for DC and AC.
...
Forum: DIY Speakers and Subs   04-14-2015, 08:03 PM
Replies: 147
Views: 14,798
Posted By michael hurd
Class 2 wiring is rated for 150V. You can use...

Class 2 wiring is rated for 150V. You can use Class 3 in place of, Class 2, but not the other way around.
Forum: DIY Speakers and Subs   04-14-2015, 07:53 PM
Replies: 147
Views: 14,798
Posted By michael hurd
Class 3 wiring is rated for 300 volts. In other...

Class 3 wiring is rated for 300 volts. In other words, SJOOW if making a portable cord. SOOW is rated for 600V.
Showing results 1 to 25 of 997

 
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