dayton rs180 - diyAudio
Go Back   Home > Forums > Loudspeakers > Multi-Way

Multi-Way Conventional loudspeakers with crossovers

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 18th December 2004, 07:41 PM   #1
diyAudio Member
 
Join Date: Oct 2004
Default dayton rs180

Can anyone suggest a tweeter for parts express's Dayton Rs180 woofer. I would like to use a first order passive crossover
  Reply With Quote
Old 18th December 2004, 09:22 PM   #2
diyAudio Member
 
Join Date: May 2004
Location: San Francisco
Send a message via AIM to joe carrow
Sorry, I don't think it's a good idea to use first order crossovers with the Dayton RS series. It might work if you push the crossover VERY low- like below 1khz... but with any aluminum cone driver, they hard part is the crossover. It's got to be a steep slope- the only way you could get away with a shallower slope would be if you could very accurately measure the breakup frequencies and filter them out.

Right now I think that the "correct" way to use this particular driver is going to be something like a 4th order crossover at 2khz to a Seas 27TDCF... but I haven't tried it yet.
  Reply With Quote
Old 18th December 2004, 11:06 PM   #3
LouC is offline LouC  United States
diyAudio Member
 
LouC's Avatar
 
Join Date: Feb 2004
Location: Aridzona
This driver is not suited for first order. The cone breakup needs a steep slope or a notch filter. I have a published design for this driver using the Neo3 PDR. Measurements are included.
http://www.lonesaguaro.com/speakers/...7/Cryolite.htm
  Reply With Quote
Old 19th December 2004, 04:13 AM   #4
diyAudio Member
 
Join Date: Oct 2004
Default dayton rs180

My plan was to use a notch filter,to deal with cone break-up. The reason I want to use a first order crossover is 1. because the speaker baffle is sloped 2.trying to make it simple
  Reply With Quote
Old 19th December 2004, 04:50 AM   #5
cjd is offline cjd  United States
diyAudio Member
 
Join Date: Jun 2004
Location: Windy City
Quote:
Originally posted by joe carrow
something like a 4th order crossover at 2khz to a Seas 27TDCF...
Absolutely.

Though the MTMs I have use a pair of RS150's and the 27TDFC. 28L tuned to 42hz (ported).

One heck of a good setup on the cheap! Maybe $130 in parts including enclosure, each. The RS180's and the 27TDFC should be a top notch match. Had I not been building for a HT where dimension limitations exist, I very probably would have gone that route.

C
  Reply With Quote
Old 19th December 2004, 05:20 AM   #6
diyAudio Member
 
Join Date: May 2004
Location: San Francisco
Send a message via AIM to joe carrow
Quote:
Originally posted by cjd


Absolutely.

Though the MTMs I have use a pair of RS150's and the 27TDFC. 28L tuned to 42hz (ported).

One heck of a good setup on the cheap! Maybe $130 in parts including enclosure, each. The RS180's and the 27TDFC should be a top notch match. Had I not been building for a HT where dimension limitations exist, I very probably would have gone that route.

C
I'm so glad to hear it! Does the Seas tweeter play very loud crossed at 2khz? My last project used a Morel MDT20 crossed first order around 4.5 khz, and that thing went as loud as I cared to listen.
  Reply With Quote
Old 19th December 2004, 03:11 PM   #7
diyAudio Member
 
Join Date: Oct 2004
Default dayton rs180

cjd Can you provided more information on your MTM rs150 Thanks
  Reply With Quote
Old 19th December 2004, 11:01 PM   #8
cjd is offline cjd  United States
diyAudio Member
 
Join Date: Jun 2004
Location: Windy City
I run out of amp before I run out of driver, and my ears aren't particularly happy at that point. I haven't pushed it to see where the limits are, but it's not the tweeter in my setup if there's any deep bass around. And even then, my ears are usually complaining before anything else.

I'm still in the crossover tweaking stage, so I have no specific plans to be shared at the moment. Generically, it looks like it models to a 4th order butterworth acoustic slope at about 2400hz (that's what it worked out to be - I only give myself a target to start with and then tweak till things start working well and not worry if it wanders a bit). Simple 3rd order electric circuits with zobel on the mids, and RL on the tweeter (probably only a resistor is needed but these tweets do pick up a few dB in the last octave).

C
  Reply With Quote
Old 20th December 2004, 01:19 AM   #9
diyAudio Member
 
Join Date: May 2002
Location: Cambridge, MA, USA
Send a message via AIM to Kilentra
Hi Chris,

What do you mean by your ears not being happy with the sound at high volumes? Is there some kind of distortion or do the speakers really play that loud? (I'm thinking about a possible TDFC upgrade for my own speakers and I'd like to get a handle on its dynamic performance...)

Thanks
Michael P
  Reply With Quote
Old 20th December 2004, 03:22 AM   #10
cjd is offline cjd  United States
diyAudio Member
 
Join Date: Jun 2004
Location: Windy City
Yes, that loud. I don't really like my music blaring loud anyhow, usually. Sometimes I do. Pines of Rome, just HAS to be loud. But no complaints on that, only just the very start of the instruments blurring (which is partly the recording - made in the 1960's), partly just that it's really tough to do a full orchestra on just a couple drivers when the orchestra decides to unleash everything it's got. I've never heard a 2-way handle this properly, and this is unquestionably one of the best I *have* heard. Some of jkrutke's were also very good, but I didn't hear this particular recording. Ironically, he uses this same tweeter...

FWIW, in an MTM the RS150's run out of excursion if there's any good bass before the tweeter runs out of steam. Though crossing it lower (as recommended by many with the Dayton RS series) would alter that somewhat. And the RS180's have a bit more travel to play with. I did hear a pair of TBFC/G's bottom, crossed at 1800hz to a single RS150. Normalized playback at 88dB on pink noise (200hz-10kHz I think it was) but just one piece. Not sure what caused it. Different driver but I think(?) similar motor. I would say that for normal playback, you'll not run into trouble.

C
  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

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


Similar Threads
Thread Thread Starter Forum Replies Last Post
Seas L18RNX/P vs. Dayton RS180-4 Jlace Multi-Way 2 17th April 2007 09:28 PM
Dayton RS180 / Seas 27TBFC 2-way Bookshelf Project Jay_WJ Multi-Way 7 11th April 2007 04:27 AM
new DIYer, Modula RS180 MT's vs. UniCC and Dayton III's clearwaterms Multi-Way 42 29th January 2007 04:14 PM
Seas P17REX & Dayton RS180 omarmipi Swap Meet 3 14th March 2006 10:34 PM
Dayton RS180 vs Dayton 6.5" kestrel200 Multi-Way 0 2nd May 2005 01:59 AM


New To Site? Need Help?

All times are GMT. The time now is 10:02 AM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2