Techtalk Speaker Building, Audio, Video Discussion Forum http://techtalk.parts-express.com/ en Wed, 19 Jun 2013 09:00:49 GMT vBulletin 60 http://techtalk.parts-express.com/images/misc/rss.png Techtalk Speaker Building, Audio, Video Discussion Forum http://techtalk.parts-express.com/ How much distance from rear vent of subwoofer need? http://techtalk.parts-express.com/showthread.php?238060-How-much-distance-from-rear-vent-of-subwoofer-need&goto=newpost Wed, 19 Jun 2013 07:44:48 GMT I only have 1.06" clearance from the center hole vent. Is this adequate of do I need to make the beam further away? ]]> Tech Talk Forum pnoneal... http://techtalk.parts-express.com/showthread.php?238060-How-much-distance-from-rear-vent-of-subwoofer-need Doubling the cone surface area and adding 1.5 lbs/ cuft poly-fill...WOW!!! http://techtalk.parts-express.com/showthread.php?238059-Doubling-the-cone-surface-area-and-adding-1-5-lbs-cuft-poly-fill-WOW!!!&goto=newpost Wed, 19 Jun 2013 07:03:53 GMT Hi techtalk forum team,

I've just become a member here on this website, but have been a customer of PE since about 2004. Being a "Funk, R&B/smooth Jazz" bass player (since 1971), and a gearhead, has also lead me down the road of the "Pro-sound audio" gear acquisition obsession. But lately, my obsession has been shifting twds the "Mobile Audio" equipment field; basically because I recently bought a new Toyota S.U.V. and I wanted the low-end to be exceptional!

I left the navigation and audio system stock, but the low-end wasn't there and really needed some help, so I decided to add a sub-woofer system. My GO-TO choice of equipment is "JL Audio". I've used their drivers and amps before (in my last s.u.v.), so that's what I'm familiar with, and I think their quality is top notch.

I started out with (1) "HD-750/1" mono-block 750W power amp and (1) ProWedge, CVS110RG-W6v2 1-10 inch sealed sub. It sounded great...at first! But some of you will understand how it is with bass. You try to be reasonable. Try not to be TOO irrational. You try to be somewhat practical. Then, before you know it, you're already planning your next upgrade. I don't mean to be like that...it just happens! :(

Okay that said, you'll know just how I got to where I am now. I bought a second CVS110RG-W6v2. Good, but I still wanted more. Next, I bought an empty, "Audio Enhancers" (2-10) 1v2-10D bass reflex (ported) cab for the two raw, JL Audio drivers, that Came out of the proWedge single 10 cabs. That cab was LOUD!! But, it was also sorta boomy, mushy, and unintelligible in the lowest register; just not happy with it. I decided to seal the two slot ports at the right & left extremities of the baffle. Attachment 37261



I Recalculated the inner (chamber) area to determine if this cab would be a good "sealed" cab for the 10W6's to live in, and it turned out that...yes, it was a great enclosure for the 2 jl's to call...home!. To seal it, I picked up 2 pieces of 3/4 (th) x 1 1/2 (w) x 11 7/8 (L) plywood and drove them into the slots "facewise", blocking the ports. I removed the 2 drivers so I could stuff the chambers (which were divided by a partition) with poly-fill material. It was Amazing!!! The f3 dropped substantially, along with gaining definition and control in the 100hz-40hz region. I knew it would be better, but I never even hoped that it would be THAT MUCH BETTER, WOW!!Click image for larger version.  Name: user83083_pic18595_1368317602_thumb-1.jpg  Views: 5  Size: 4.5 KB  ID: 37262



Fast fwd. I was so pleased with the hole concept of doubling the cone surface area; like the 1'st time I did it; remember going from only one ten, to two 10's. I just kept imagining what going from two 10's, to four (4) tens would feel like. "That's a lot of SD"! But would there be room back in the cargo area for another box like the ported AE box?? No, but there is enough room IN the ported AE box for an additional pair of 10W6 drivers.Click image for larger version.  Name: user83083_pic12486_1341466979_thumb.jpg  Views: 5  Size: 4.9 KB  ID: 37263



Opps, sorry! Never meant to make this post soooo long; especially since it's my very first post. Okay, here's what I did. I couldn't borrow a router from anyone, so I bought a "reconditioned" one online for $49. I ordered 2 more jl 10W6v2 drivers for $317 each from amazon; the latest version (v3) costs around $499 each, but my original 2 are the version 2 (v2), so it was better to stay with the ones that I have for an exact T/S match, and their cheaper.

I ordered 2 new jl speaker grills for the 10W6 from crutchfield for $19. When all the parts arrived, I just cut two 9" holes in the top portion of the cabinet. P.S. the cab measures 18" from baffle to back. The driver motors measure 7" from inner flange to tail, so I had to place the new drivers close to the cabs rear panel (flange about 2 inches from the back panel), just to keep the magnets separated.Click image for larger version.  Name: IMG310.jpg  Views: 5  Size: 18.4 KB  ID: 37264


When I fired it up, I expected the low-end to be more powerful than before; after all, more surface area usually translates to better spl, low-end extension, and more efficiency in terms of amp power/output. But this box clearly had a problem. I checked the wiring polarity, readjusted my input levels, LP filter adjustment, but everything checked out. Then it hit me...
"The poly-fill". Now that I've effectively cut the box area in half (by adding more drivers, you have to divide the enclosure area, by the number of drivers; considering driver internal net vol. the 10W6v2 requires 0.625-not to be confused with driver displ., which is 0.068). Here's where this forum came in handy. I couldn't decide how much poly to use. I already had some in there, but I never was too sure just how much was appropriate.

In most "Pro-audio" (vented) boxes, you'll find only three opposite inner walls lined with acoustic material. But these subs are sealed, so I had to come here to this forum last week before I became a member, to find out how much to put in. I saw a few different formulas, so I just went with 1.5 lbs/cuft. So 3.5 ft3 x 1.5lbs=5.25. I put it in, fired it up and voila'..."Unbelievable"!! I couldn't believe the difference!

The f3 dropped about 1/3 octave, spl is increased, at least 6db...at least! So thx guys for sharing your knowledge with the rest of us, I really appreciate it!!

rigtec, cheers
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]]> Tech Talk Forum rigtec http://techtalk.parts-express.com/showthread.php?238059-Doubling-the-cone-surface-area-and-adding-1-5-lbs-cuft-poly-fill-WOW!!! Correctly measured phase response http://techtalk.parts-express.com/showthread.php?238058-Correctly-measured-phase-response&goto=newpost Wed, 19 Jun 2013 05:05:04 GMT Dear All, This is an interesting and highly recommended paper on correctly measured phase response: ... Dear All,


This is an interesting and highly recommended paper on correctly measured phase response:

http://www.excelsior-audio.com/Publi...eive_Delay.pdf

Best Regards,
Bohdan ]]> Tech Talk Forum bohdan http://techtalk.parts-express.com/showthread.php?238058-Correctly-measured-phase-response mh-audio http://techtalk.parts-express.com/showthread.php?238057-mh-audio&goto=newpost Wed, 19 Jun 2013 02:01:54 GMT Has anyone seen, and/or used this site? If so, any thoughts or comments? Has anyone seen, and/or used this site?
If so, any thoughts or comments? ]]> Tech Talk Forum richard t http://techtalk.parts-express.com/showthread.php?238057-mh-audio Heading to Fairfield, CA for 10 days... http://techtalk.parts-express.com/showthread.php?238056-Heading-to-Fairfield-CA-for-10-days&goto=newpost Wed, 19 Jun 2013 01:51:30 GMT I'm heading to Travis AFB for work for 10 days and am curious about any DIY/speaker "stuff" I might find in the area. Anything interesting as far as audio goes? Anybody in the area that would be willing to walk a guy through speaker measurement? I've got an EMM-6 mic and a blue icicle and haven't had much luck getting things to work.
Thanks,
Mike ]]> Tech Talk Forum mikejennens http://techtalk.parts-express.com/showthread.php?238056-Heading-to-Fairfield-CA-for-10-days Enya The long ships http://techtalk.parts-express.com/showthread.php?238055-Enya-The-long-ships&goto=newpost Wed, 19 Jun 2013 01:01:19 GMT I found this beautiful tune, that makes to work hard to your subs. It has very low bass content. Enjoy http://www.youtube.com/watch?v=rZjm-lHqXQk I found this beautiful tune, that makes to work hard to your subs.
It has very low bass content.
Enjoy

http://www.youtube.com/watch?v=rZjm-lHqXQk ]]> Tech Talk Forum abn1701 http://techtalk.parts-express.com/showthread.php?238055-Enya-The-long-ships Clio Test Microphone http://techtalk.parts-express.com/showthread.php?238054-Clio-Test-Microphone&goto=newpost Wed, 19 Jun 2013 00:38:08 GMT My Clio system died and I have the microphone available (MIC-02). The new calibrated units are $425 but I'm only asking $125 plus shipping. Please PM or email me if interested. ]]> Free Classifieds rickcraig http://techtalk.parts-express.com/showthread.php?238054-Clio-Test-Microphone Horn Loaded Design Help http://techtalk.parts-express.com/showthread.php?238053-Horn-Loaded-Design-Help&goto=newpost Tue, 18 Jun 2013 23:50:42 GMT Hi everyone new to the forum but not to speaker enclosure design. I am looking for help on Front and Rear Loaded horn enclosures. It is my last... Hi everyone new to the forum but not to speaker enclosure design.

I am looking for help on Front and Rear Loaded horn enclosures. It is my last enclosure design for me to learn and has escaped my grasp for the last few years. I have read everything I can find on the internet and in books. I understand the whole concept just cant get my math right.

Figured this would be the best place to ask for help and the best time since I have decided to build a full range driver setup. Going to use the Dayton Audio PS180-8 6 1/2 Point Source Drivers I have had for a year or so. Already have a Bass Reflex, and T-line Designed for them but want to do something new.

Any help is greatly appreciated. ]]> Tech Talk Forum audiophiletech http://techtalk.parts-express.com/showthread.php?238053-Horn-Loaded-Design-Help KLH model thirty two tweeter replacement suggestions http://techtalk.parts-express.com/showthread.php?238052-KLH-model-thirty-two-tweeter-replacement-suggestions&goto=newpost Tue, 18 Jun 2013 22:05:49 GMT Hi, I'm hoping to replace a dead KLH model 32 tweeter. I know it is the tweeter and not the circuit, because I have switched the working tweeter into the place of the dead tweeter, and then the speaker works.
I've looked on ebay for model 32 tweeters, can't find any. I'd be grateful for any suggestions about what might be a good (and not too expensive) substitute.
Thanks very much.
M ]]> Tech Talk Forum appleswim1 http://techtalk.parts-express.com/showthread.php?238052-KLH-model-thirty-two-tweeter-replacement-suggestions <![CDATA[10" driver for bass guitar.]]> http://techtalk.parts-express.com/showthread.php?238051-10-quot-driver-for-bass-guitar&goto=newpost Tue, 18 Jun 2013 21:36:50 GMT My nephew called me and asked if I knew good drivers for a bass guitar. Someone is building him a amp. I didn't know off hand, so I thought I'd ask.

He wants to use two 10" drivers.

Or, if anyone knows a proven design or better driver, please share. ]]> Pro Audio / Live Sound Reinforcement generic http://techtalk.parts-express.com/showthread.php?238051-10-quot-driver-for-bass-guitar Possibly a stupid question http://techtalk.parts-express.com/showthread.php?238050-Possibly-a-stupid-question&goto=newpost Tue, 18 Jun 2013 21:24:21 GMT Would it be ok to cross the Visaton FRS 5 X (http://www.visaton.com/en/chassis_zubehoer/breitband/frs5x_8.html) over at 1000Hz? I suggested to... Would it be ok to cross the Visaton FRS 5 X over at 1000Hz?
I suggested to someone that I was thinking of putting the FRS 5 X in a large waveguide and would cross it at 1000Hz to an 8" woofer. He said that it's only got a 5 watt power handling, so wouldn't be a good idea. I said that the 5 watt rating was for when it's used full range (it's supposed to be a full range driver) and that cutting it off at 1000Hz should mean it will take a lot more power.

Though it would be best to ask you guys before trying it. What do you think? ]]> Tech Talk Forum fatmarley http://techtalk.parts-express.com/showthread.php?238050-Possibly-a-stupid-question <![CDATA[Pair of Audax 5 1/2" speakers.]]> http://techtalk.parts-express.com/showthread.php?238049-Pair-of-Audax-5-1-2-quot-speakers&goto=newpost Tue, 18 Jun 2013 19:46:03 GMT Make a offer plus shipping, or trade. Whatever. Never used, don't own the car they were going to go in. Just clearing closet space.
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]]> Free Classifieds generic http://techtalk.parts-express.com/showthread.php?238049-Pair-of-Audax-5-1-2-quot-speakers 3-way build driver suggestions needed http://techtalk.parts-express.com/showthread.php?238048-3-way-build-driver-suggestions-needed&goto=newpost Tue, 18 Jun 2013 19:14:22 GMT My brother recently asked me to build him a pair of speakers for his HT system. He said he uses it for probably 90% movies/TV and 10% music. I've been loking things over for about a week or so and thought I might try and go with a small, stand-mounted 3-way unless someone has any better suggestions. Total budget for drivers is under $100. Here is what I am looking at:

Tweeter: Dayton ND16FA

Mid: Vifa TC6FD00-04 or Vifa TC9FD-18-08

Woofer: Peerless 5 1/4" Buyout or Tang Band 5" subwoofer buyout

I would go ported on the Tang Band mini sub and sealed on the Peerless. What do you guys think? I picked the Vifa mids based on their low distortion and smooth response from Zaph's testing. They should mate easily to the ND16FA, which has very low distortion above 4khz. The Peerless buyout also looks like a really good driver for the price, but it requires a bit of a larger box. I haven't ever seen anyone use the Tang Band mini sub so I don't know anything about it besides the manufacturers specs.

Any other suggestions for drivers in a small 3-way under $100? Are there any better 2-way options out there for this price? ]]> Tech Talk Forum Navy Guy http://techtalk.parts-express.com/showthread.php?238048-3-way-build-driver-suggestions-needed Dayton DVC310-88 Cedar Chest subwoofer build http://techtalk.parts-express.com/showthread.php?238047-Dayton-DVC310-88-Cedar-Chest-subwoofer-build&goto=newpost Tue, 18 Jun 2013 19:00:57 GMT Attachment 37247 (http://techtalk.parts-express.com/attachment.php?attachmentid=37247)Attachment 37248... Click image for larger version.  Name: 20130607_164414.jpg  Views: 48  Size: 20.8 KB  ID: 37247Click image for larger version.  Name: 20130607_164432.jpg  Views: 52  Size: 19.4 KB  ID: 37248
My dad (bark424) and I will soon be starting our cedar chest build, using the 12" Dayton DVC310-88 sub (http://www.parts-express.com/pe/show...number=295-185). Here are some pics of what will soon be a beautiful piece of audio-furniture.

It will be a down firing system with the amp hidden away inside. More updates to come
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]]> Tech Talk Forum dustinbagby http://techtalk.parts-express.com/showthread.php?238047-Dayton-DVC310-88-Cedar-Chest-subwoofer-build WTT: PE 1000 plate amp for the rack mounted version http://techtalk.parts-express.com/showthread.php?238046-WTT-PE-1000-plate-amp-for-the-rack-mounted-version&goto=newpost Tue, 18 Jun 2013 18:36:36 GMT If anyone has the rack version of the PE 1000 watt amp and would like the plate version instead I'd be willing to trade.

Or if you have a Yamaha P5000s pro amp I'd consider trading my plate amp + money for it... ]]> Free Classifieds rjrauso http://techtalk.parts-express.com/showthread.php?238046-WTT-PE-1000-plate-amp-for-the-rack-mounted-version