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Old 20th April 2014, 03:44 AM   #71
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Quote:
Originally Posted by krafty View Post
Wolf_teeth, you will forgive me saying this, but I have a hard time interpreting your schematics. Have you considered using a software like "TinyCad", "Dia" or "Visio" for doing circuits?
I have not as I made my own template. The MAX is an older design from me, so it was an earlier drawing.

Most of my schematics now look like this:

Click the image to open in full size.

I just made a bitmap template in MS-Paint, and setup as necessary.

If there is anything I can help with, please ask.
Wolf
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Old 20th April 2014, 04:46 AM   #72
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Default 8" Dayton RS225-8 alu vs. RS225P-8 paper

Dayton Audio Reference Series RS225-8 8" Alu woofer pdf vs. the RS225P-8 Reference Paper pdf
This is getting serious...
Edit: The P has 3dB more than the alu.
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Last edited by Inductor; 20th April 2014 at 04:55 AM.
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Old 20th April 2014, 09:03 AM   #73
system7 is offline system7  United Kingdom
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Perhaps those who are recommending the composite Dayton Audio RS-225P-8 would like to put their money where their mouth is and suggest a circuit for it.

It certainly needs entirely different treatment from the SEAS and Visaton style woofers I have been talking about.

Doesn't look so easy to me. I think we are talking a complete redesign and lower crossover point here.
Attached Images
File Type: jpg Dayton RS225P-8 Composite 8inch bass.JPG (57.6 KB, 176 views)
File Type: jpg Visaton W200S.JPG (49.9 KB, 169 views)
File Type: jpg SEAS CA22RNY.jpg (48.4 KB, 168 views)
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Old 20th April 2014, 03:30 PM   #74
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The Dayton looks more like the 8'' SB23NRXS45-8
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Old 23rd April 2014, 08:30 AM   #75
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Quote:
Originally Posted by system7 View Post
Perhaps those who are recommending the composite Dayton Audio RS-225P-8 would like to put their money where their mouth is and suggest a circuit for it.
They've only been out for 2 months so far, give it some time....
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Old 23rd April 2014, 10:23 AM   #76
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Face posted on AVS that he has a pair and will post up results of the RS225P.

Those who post suggesting they aren't going to be good as well as those who think they are the next best thing should wait for results before praising or bashing.
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Old 23rd April 2014, 10:24 AM   #77
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Quote:
Originally Posted by system7 View Post
Perhaps those who are recommending the composite Dayton Audio RS-225P-8 would like to put their money where their mouth is and suggest a circuit for it.
How is the DCX2496 circuit?
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Old 26th April 2014, 05:24 PM   #78
krafty is offline krafty  Brazil
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The Visaton deal drowned. Too many taxes and high freight. They even offered a 42% discount. Kudos to them.
I will have to look for a Selenium/JBL driver.
One thing I notice is that in their woofers category, there is not a single driver with the border foam (no acoustic suspension drivers in that category).
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Old 26th April 2014, 06:44 PM   #79
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Default Selenium drivers

Quote:
Originally Posted by krafty View Post
...
One thing I notice is that in their woofers category, there is not a single driver with the border foam (no acoustic suspension drivers in that category).
Rubber lasts longer (than foam or derivatives).
Yes, they respond more to car audio or PA/pro market than to home audio. I'm not sure what's the reason, but you can always make that question to the Brazilian engineers. You can pay a call (or email) to Eng. Homero Sette Silva (Selenium) to ask that question.

You might have to work like in the old times (with vintage woofers or fullranges). Use the drivers available and be inventive using OB or aperiodic.

The Selenium drivers are a good introduction to open baffle (OB), or the aperiodic (you may have to experiment yourself.
12PW3 / 12PW3 SLF pdf
JBL SELENIUM

Another driver from Selenium (Matador Series) reference# 12SW10A DVC is good in your case, for a sealed speaker 30L and higher (Q 1.2), 50L (Q 1.0), and would give you a good starting point for a serious project 2 or 3 ways. You can also try the OB/aperiodic enclosures with this driver having a lot to deal with, test and measure for years (diy is about).
Selenium Matador pdf

Selenium 12WS600 pdf
Reflex 33L
94.0 dB/2.83V/m
30Hz@79.0 dB
Selenium 12WS600 12" 600W Woofer | 264-391

Selenium 15SW3P pdf
Reflex 60L
95.5 dB/2.83V/m
30Hz@84.5 dB

JBL 2206H pdf
Reflex 30L (no low freq. extension use the 15")

JBL 2226H, VB = 82 L, FB ~38 Hz pdf
98.3 dB/2.83V/m
30Hz@85 dB

You can find kits/speakers arranged around this excellent driver in the PI SPEAKERS website (link below) that was linked before (post#6 by system7), in the form of the "four Pi speaker" kit and others. Wayne P. also arranges for parts like the crossovers layouts for his kits (drivers) only. Pi Speakers - unmatched quality and state-of-the-art performance
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Last edited by Inductor; 26th April 2014 at 06:55 PM.
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Old 26th April 2014, 09:50 PM   #80
krafty is offline krafty  Brazil
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Inductor, many thanks for your tips.

Indeed... it seems to be that the whole speaker market here is car oriented. Every manufacturer site I go to (Bravox, Selenium, etc) is "automotive". I will try to list here all the known available brands in here, to see if one of the names shines out to you.

As I did in my other topic, I will do here as well: post pictures of the current enclosure damping material. Will replace for the egg crate foam. At the time when I built that box, I had no idea of what I was doing, but I used gaskets and polyester damping sheet. I also surprised myself that I had drawn a place for a port right in there. Now I just have to cut it.

My goal will be finding the best cost-benefit driver for this 30L box. I guess anything will be superior to this Hinor crap and piezo.
Attached Images
File Type: jpg IMG_0387.JPG (182.7 KB, 106 views)
File Type: jpg IMG_0388.JPG (163.0 KB, 21 views)
File Type: jpg IMG_0389.JPG (159.5 KB, 31 views)
File Type: jpg IMG_0390.JPG (175.9 KB, 32 views)

Last edited by krafty; 26th April 2014 at 09:55 PM.
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