My new year’s resolution: Dual Dayton DVC385 ported build / DIY HT speaker / room acoustics upgrade! - Page 4 - AVS Forum | Home Theater Discussions And Reviews
Baselworld is only a few weeks away. Getting the latest news is easy, Click Here for info on how to join the Watchuseek.com newsletter list. Follow our team for updates featuring event coverage, new product unveilings, watch industry news & more!



Forum Jump: 
 20Likes
 
Thread Tools
Old 09-24-2014, 03:57 AM
AVS Special Member
 
Martycool007's Avatar
 
Join Date: Jun 2011
Posts: 3,697
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 280 Post(s)
Liked: 175
Awesome thread Mr. Matt! I actually have some MFW-15 drivers that I never ended up building as I have duel (at the moment) Dayton HO18's in a pair of full sized MartySubs, however, your build with the Dayton DVC's has inspired me to build something for them!

You are da-man!
Martycool007 is offline  
Sponsored Links
Advertisement
 
Old 09-24-2014, 04:25 AM
AVS Special Member
 
wormraper's Avatar
 
Join Date: Jun 2006
Location: Tucson Arizona
Posts: 5,009
Mentioned: 6 Post(s)
Tagged: 0 Thread(s)
Quoted: 311 Post(s)
Liked: 152
Quote:
Originally Posted by mtg90 View Post
Recent acquisitions:


I am going to be using a Bridged EV AP2600 for each sub (~1000w @ 4 ohms), then the Altec 9446A will handle the L/R (650w/channel @ 4 ohms) and one of the Altec 9444's will be bridged powering the center (1000w @ 4 ohms). I have three Altec 9444's so I could in theory bridge them and have the LCR each on it's own 1000w amp but unfortunately I don't have the space for seven 3U amps.

Here is where they are mounted:



Now with all those amps I decided to run some extra power to the HT. I ran a 10awg line off a 30amp circuit in the main panel that feeds into this small load center which spits into two 20 amp circuits. One will be dedicated to the subs while the other runs the speaker amps, AVR and other source devices. While it is possible the 30 amp breaker at the main panel could trip before either of these I have a feeling if anything is going to trip it will be 20 amp breaker running the subs.



The next problem was how to trigger all of the amps to turn on separately so that the surge current does not trip any breakers. At the same time triggering the sub amps to power up after then miniDSP and shut off before it in order to prevent any turn on/off thump from the miniDSP itself. I searched a while for sequencing devices that could do this but they were big bucks for the 20 amp options and I would need one for each circuit. I decided to cheap out and go the manual way, DIY plug in breakout boxes with light switches. Each amp is on it's own switch so I can power them up and down separately and these should have no trouble handling all that current:



Everything plugged in:


Finally switches mounted on the equipment shelf, I've since added labels:
call me stupid MTG90, but I thought those Dayton DVC's were only 350 watt RMS drivers (power handling wise).... isnt tossing 1000 watts going to fry them?
wormraper is offline  
Old 09-24-2014, 09:08 AM - Thread Starter
AVS Special Member
 
mtg90's Avatar
 
Join Date: Aug 2011
Location: Millbrook, IL
Posts: 1,299
Mentioned: 216 Post(s)
Tagged: 0 Thread(s)
Quoted: 330 Post(s)
Liked: 599
I doubt I'll be cooking any voice coils, I don't listen to full power sine waves. Any sizable amount of power through the coils will be relatively short term, if something is going to give it will be the spider like the one on the previous page. The extra power is useful as headroom in the upper bass.
mtg90 is offline  
Old 09-24-2014, 09:15 AM
AVS Addicted Member
 
Mfusick's Avatar
 
Join Date: Aug 2002
Location: Western MA
Posts: 31,720
Mentioned: 20 Post(s)
Tagged: 0 Thread(s)
Quoted: 596 Post(s)
Liked: 2533
Where did you get the amps ?

-

"Too much is almost enough. Anything in life worth doing is worth overdoing. Moderation is for cowards."
Mfusick is offline  
Old 09-24-2014, 09:44 AM - Thread Starter
AVS Special Member
 
mtg90's Avatar
 
Join Date: Aug 2011
Location: Millbrook, IL
Posts: 1,299
Mentioned: 216 Post(s)
Tagged: 0 Thread(s)
Quoted: 330 Post(s)
Liked: 599
I got the Altec 9446 from the PE tent sale back in 2013, the rest from eBay over the past year or so.

I currently have:
1 Altec 9442A
3 Altec 9444B's
1 Altec 9446A
4 EV AP2600A's (EV rebadge of 9444B's)

The 9442, two of the 9444's and a 2600 I purchased as parts/repair for very little, shipping was as much or more then the cost of the amp. Only the 9444's had any issues one was a fairly easy inexpensive fix. The other was more difficult to diagnose, a channel would randomly go into protect, finally found the thermistor used for the over temp cutoff on that channel had a cold solder joint. The other amps the sellers could not test to verify working condition which is why they sold them for parts/repair.

In all the amps I am using except the 9446 I replaced the original fan which had become pretty noisy with some new ball baring ones. The fans (both original and the replacements) are 120v AC which makes it easy to mod to slow them down, I just placed a small 1.8uf cap in front of them which cuts the AC voltage without sucking up any power. They have a thermal switch on the heat sink so that will trigger and bypass the cap (and original low speed resistor) if that gets too warm.

Last edited by mtg90; 09-24-2014 at 09:50 AM.
mtg90 is offline  
Old 09-24-2014, 10:16 PM
AVS Addicted Member
 
LTD02's Avatar
 
Join Date: Oct 2003
Posts: 19,887
Mentioned: 277 Post(s)
Tagged: 1 Thread(s)
Quoted: 2032 Post(s)
Liked: 2258
"If you look close you can see I built them as mirror images on one another."


haha... that was actually the first thing that i noticed (or is that expected?). :-)


the bass cabs are really nice. as you know, getting the right dimensions for an overall balanced look can be tricky. that said, it looks like you really nailed it with this set. -two thumbs up-

Listen. It's All Good.
LTD02 is online now  
Old 10-30-2015, 06:00 AM
AVS Special Member
 
brian6751's Avatar
 
Join Date: Mar 2006
Location: Canton, MI
Posts: 4,690
Mentioned: 6 Post(s)
Tagged: 0 Thread(s)
Quoted: 594 Post(s)
Liked: 435
Quote:
Originally Posted by mtg90 View Post
Adding a pair of new subs to replace the small 8" folded horns I have at the back for smoothing:


I know this is an old thread but if I wanted to move the port so it is straight and fires out the top instead of the side, would it still be 36.25" long? obviously I would have to make the box taller so i would decrease the width to like 18" and increase the height to 41" @mtg90

Last edited by brian6751; 10-30-2015 at 05:52 PM.
brian6751 is offline  
Old 10-30-2015, 08:07 PM - Thread Starter
AVS Special Member
 
mtg90's Avatar
 
Join Date: Aug 2011
Location: Millbrook, IL
Posts: 1,299
Mentioned: 216 Post(s)
Tagged: 0 Thread(s)
Quoted: 330 Post(s)
Liked: 599
Those adjustments should work fine.

But note the newer Dayton DVC385-88 parts express is currently selling (on clearance but price seems to have gone up?) do not model as well as the older ones did in this box. It looks like they changed things up at some point and moved to a weaker motor which is not good for a compact low tuned ported enclosure like this. The newer driver looses 1-1.5dB around tuning has higher inductance and the response leaves you with a larger bass peak in the middle of the range.
brian6751 likes this.
mtg90 is offline  
Old 10-30-2015, 08:27 PM
Bass Enabler
 
Scott Simonian's Avatar
 
Join Date: Oct 2001
Location: Clovis, CA
Posts: 19,900
Mentioned: 126 Post(s)
Tagged: 0 Thread(s)
Quoted: 4565 Post(s)
Liked: 3469
Quote:
Originally Posted by mtg90 View Post
Those adjustments should work fine.

But note the newer Dayton DVC385-88 parts express is currently selling (on clearance but price seems to have gone up?) do not model as well as the older ones did in this box. It looks like they changed things up at some point and moved to a weaker motor which is not good for a compact low tuned ported enclosure like this. The newer driver looses 1-1.5dB around tuning has higher inductance and the response leaves you with a larger bass peak in the middle of the range.
Really? Damnit! I thought that driver was just perfect as it is was.
brian6751 likes this.
Scott Simonian is online now  
Old 10-30-2015, 09:07 PM
AVS Special Member
 
brian6751's Avatar
 
Join Date: Mar 2006
Location: Canton, MI
Posts: 4,690
Mentioned: 6 Post(s)
Tagged: 0 Thread(s)
Quoted: 594 Post(s)
Liked: 435
Quote:
Originally Posted by mtg90 View Post
Those adjustments should work fine.

But note the newer Dayton DVC385-88 parts express is currently selling (on clearance but price seems to have gone up?) do not model as well as the older ones did in this box. It looks like they changed things up at some point and moved to a weaker motor which is not good for a compact low tuned ported enclosure like this. The newer driver looses 1-1.5dB around tuning has higher inductance and the response leaves you with a larger bass peak in the middle of the range.
would the RSS390HO-4 still work?
brian6751 is offline  
Old 10-30-2015, 09:28 PM - Thread Starter
AVS Special Member
 
mtg90's Avatar
 
Join Date: Aug 2011
Location: Millbrook, IL
Posts: 1,299
Mentioned: 216 Post(s)
Tagged: 0 Thread(s)
Quoted: 330 Post(s)
Liked: 599
Yes that driver would work well.
brian6751 likes this.
mtg90 is offline  
Old 10-31-2015, 07:28 PM
AVS Special Member
 
coolrda's Avatar
 
Join Date: Nov 2002
Location: Bakersfield, CA
Posts: 2,525
Mentioned: 94 Post(s)
Tagged: 0 Thread(s)
Quoted: 578 Post(s)
Liked: 443
Quote:
Originally Posted by brian6751 View Post
would the RSS390HO-4 still work?
Pulling these out of storage. It's funny you mention the ho15. I was reminiscing today about how the hf15 was the go to sub for value 4-5 years back. Both are nice driver.
brian6751 likes this.
coolrda is offline  
Old 10-31-2015, 07:35 PM
AVS Special Member
 
brian6751's Avatar
 
Join Date: Mar 2006
Location: Canton, MI
Posts: 4,690
Mentioned: 6 Post(s)
Tagged: 0 Thread(s)
Quoted: 594 Post(s)
Liked: 435
Quote:
Originally Posted by coolrda View Post
Pulling these out of storage. It's funny you mention the ho15. I was reminiscing today about how the hf15 was the go to sub for value 4-5 years back. Both are nice driver.
they are still a lot of value. It just depends on what you need. Most people jump to 18's for recommendations but these 15's still have their place. You can power 4 of these off of one iNuke 300DSP to pretty great levels.
brian6751 is offline  
Old 11-02-2015, 07:29 AM
AVS Special Member
 
brian6751's Avatar
 
Join Date: Mar 2006
Location: Canton, MI
Posts: 4,690
Mentioned: 6 Post(s)
Tagged: 0 Thread(s)
Quoted: 594 Post(s)
Liked: 435
Quote:
Originally Posted by mtg90 View Post
Yes that driver would work well.

did you just cut out a ring and glue it behind the baffle for the recess?
brian6751 is offline  
Old 11-02-2015, 08:34 AM - Thread Starter
AVS Special Member
 
mtg90's Avatar
 
Join Date: Aug 2011
Location: Millbrook, IL
Posts: 1,299
Mentioned: 216 Post(s)
Tagged: 0 Thread(s)
Quoted: 330 Post(s)
Liked: 599
It may have been a square piece with the hole in it, same principal but less cutting.
brian6751 likes this.
mtg90 is offline  
Old 11-02-2015, 08:36 AM
AVS Special Member
 
brian6751's Avatar
 
Join Date: Mar 2006
Location: Canton, MI
Posts: 4,690
Mentioned: 6 Post(s)
Tagged: 0 Thread(s)
Quoted: 594 Post(s)
Liked: 435
Quote:
Originally Posted by mtg90 View Post
It may have been a square piece with the hole in it, same principal but less cutting.
thanks

how are these working out? Any issues with rocking back and forth?
brian6751 is offline  
Old 11-02-2015, 08:51 AM - Thread Starter
AVS Special Member
 
mtg90's Avatar
 
Join Date: Aug 2011
Location: Millbrook, IL
Posts: 1,299
Mentioned: 216 Post(s)
Tagged: 0 Thread(s)
Quoted: 330 Post(s)
Liked: 599
They are working well for me. Due to their location in my room they don't really contribute much below 25hz but really helped even out things above that where I needed it. I don't get much rocking at all. I have a large cutting board I made on top of one so it can be used sort of as an end table and only when really cranking things does stuff placed on top start to rattle but the enclosure itself does not really move.
brian6751 likes this.
mtg90 is offline  
Old 11-09-2015, 03:56 PM
AVS Special Member
 
brian6751's Avatar
 
Join Date: Mar 2006
Location: Canton, MI
Posts: 4,690
Mentioned: 6 Post(s)
Tagged: 0 Thread(s)
Quoted: 594 Post(s)
Liked: 435
Quote:
Originally Posted by mtg90 View Post
Those adjustments should work fine.

But note the newer Dayton DVC385-88 parts express is currently selling (on clearance but price seems to have gone up?) do not model as well as the older ones did in this box. It looks like they changed things up at some point and moved to a weaker motor which is not good for a compact low tuned ported enclosure like this. The newer driver looses 1-1.5dB around tuning has higher inductance and the response leaves you with a larger bass peak in the middle of the range.
Matt is this using the current specs in the PE page?
brian6751 is offline  
Sponsored Links
Advertisement
 
 
Thread Tools


Forum Jump: 

Posting Rules  
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off