Duane Brown "Dayton 4" Deluxe version

[rpb]

I guess I don't see what you're saying. He upgraded the quality of the caps but didn't change their values or any other in the crossover. Why add a few extra parts to notch out anything when he loves how they sound and so do multiple other people like Craig and Wolf.

My suggestion was to create a new design. It was just a suggestion.

[rpb]

Hi Guys,
Here is the FR of Duane's original in red and the "deluxe'" in green. The conditions and volume level were identical so I am not sure why they do not overlay more exactly. I'll leave it to more experienced folks to think about that. My room eq wizard setup is delightfully consistant when I retest a speaker, maybe the differences are dueto driver variation or the 1/2" increase in cabinet width. I am not set up to do reliable off axis FR plots but don't hear any brightness. I suspect that the high frequency rise drops off off axis (or it could be because I cant hear above 11K).

Some, if not all cones allow sound from inside the box to escape through the cone, and combine with the drivers output. The damping that you added might reduce those reflections considerably.

[stephenmarklay]

Well shoot, I may have to take a close look at these. I am a fan of bookshelf speakers anyway.

[Jake]

I was definitely interested when i read all the positive press it got from the show. The cost makes it a no-brainer budget build for me.

[stephenmarklay]

Can anyone compare what the sound would be like compared to the smaller “passive aggressives”, these are both on my radar for TV duty.

[Jeff F.]

Can anyone compare what the sound would be like compared to the smaller “passive aggressives”, these are both on my radar for TV duty.

The D4 will play louder with it's higher sensitivity and also go much lower with better bass response.

[stephenmarklay]

Thank you Jeff. that may be a better solution for the TV rather than desktop but I may need to follow that up with the PA for my workstation!

The tweeters are out of stock unfortunately so I will have to wait a bit.

[stephenmarklay]

I noticed the lack of details on the link to Duane’s design. I am going that route for my space requirements. Duane does not elaborate on tweeter/woofer position… Is this something I can approximate?

[a4eaudio]

Just zooming in on the pic...tweeter and woofer are centered horizontally; looks like a 1/4" roundover all around which makes me think the top edge of the tweeter is about 1/2" from top edge of cabinet (before the roundover); the edge of the tweeter looks to be 1/8" or so from edge of woofer. Given how small the front baffle is to begin with, if you are pretty close to what he did you should be fine.

[stephenmarklay]

Just zooming in on the pic...tweeter and woofer are centered horizontally; looks like a 1/4" roundover all around which makes me think the top edge of the tweeter is about 1/2" from top edge of cabinet (before the roundover); the edge of the tweeter looks to be 1/8" or so from edge of woofer. Given how small the front baffle is to begin with, if you are pretty close to what he did you should be fine.

Thank you a4eaudio. That was what I was thinking. I will get close to what his looks like and hope it is ok. I doubt for my TV that any of it makes a ton of difference anyway.

[stephenmarklay]

Those darn tweeters are out of stock with an updated eta of 11/29. I want to build these so I hope they are not further delayed.

[stephenmarklay]

How feasible would it be to use two of the 8 ohm variants of this woofer, doubling the volume. What would one have to do crossover wise to do this? I am not very schooled in cross over design let alone a series crossover. I am looking for a cool sound bar and this would be a cool, not too $, option.

[PWR RYD]

Those darn tweeters are out of stock with an updated eta of 11/29. I want to build these so I hope they are not further delayed.

I have a brand new pair of ND16FA-6 tweeters I would be willing to sell you. PM me if you are interested.

[marvin]

At InDIYana 2019, I was tremendously impressed with Duane Brown's entry the "Dayton 4", not just because of the phenomoninal bass it had for such a small speaker but due to its overall performance. When I got home, with the help of a forum resident I was able to find Duane's published project details here:https://duanebrowndesigns.blogspot.c...akers.html?m=1 I built a pair for myself and was able to listen to them with a wide variety of music. I was even more impressed than at INDY where they were played briefly in a pretty large room. Long story short, I felt they were a truly exceptional design, not just for their size and price, but for their overall sound quality.



The basic changes that were made were to: 1. Change the cabinet material to 3/4" baltic birch. 2. Change the cabinet outside dimensions to 8.5 tall X 6.5 wide X 10.5 deep. 3. Line back panel of cabinet with 1.5" sonic barrier and the side walls with .5 sonic barrier. 4. Replace all caps with good quality polypropolene versions. 5. Change 1.25 diameter port length to 5.5 inches for slightly tighter bass. Please see the link to Duane's design for crossover diagram.
That is it. In my version the tweeter is centered 43mm down from the top and the woofer129 mm down. (for sensitive measurements I like to use mm s) Tip. The ND 16 fits best if you drill it's hole with a 32mm Forstner bit.


Best regards,

Jay

Jay, did you use a 1.25 (1 1/4) inch or 1.125 diameter port? Duane's write up specifies 1.125 (1 1/8) inch diameter.

Also, I could only find a Dayton Audio 8.2 mF cap in the higher quality version. Did you use the 8.2 or another 8.0?
I know I can parallel two 4 mF caps if I need to.

Thanks,
Marv

[Drjay]

Hi Marvin,

I've been out of town, away from my computer until a few hours ago; sorry for the slow response. The port I used was 1.250" and the cap was the 8.2 uF you referenced. I doubt that you would hear a difference with two 4 mf caps. Believe it or not, the woofer is so strong that on electronic music with bass in the 30s ( London Grammar, "Hey now") it is possible to hear a little chuffing even with the 1.25 port. Of course the speaker is distorting significantly by that point, but is not bottoming out or making any other scary noises.

Best,
Jay