Mark Audio CHR-70 Application Thread - Page 30 - diyAudio
Go Back   Home > Forums > Loudspeakers > Full Range

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 10th September 2009, 10:47 AM   #291
Ian444 is offline Ian444  Australia
diyAudio Member
 
Join Date: Nov 2008
Location: Brisbane QLD
audiosteve,

I was hoping no-one would ask these questions

I wasn't aware that anyone had compared the dual driver version to the single. I did think about doing a dual, but that's as far as it got... To answer your question I find nothing lacking, but I have never owned decent speakers before this. When I first ran them, it was like a sub had been added, compared to my old bookshelf speakers (Klipsch RB-61). The hi and low frquencies have very good clarity, voices sound sweet. The clarity is what I really like. This "new-found" bass inspired me to build some BIB for the CHR-70 (with my mate Dave who has them at his place about 4 hr drive from here) and also we cut some wood for BIB for HiVi M4N which are nearly completed at my place. I wanted to see what BIB could do compared to the Lotus. I'm new to full-range and building so I'm in some sort of exploring mode at the moment. Dave had heard my Lotus, and wanted me to help him build some Lotus for his daughters' birthdays, so I drove up there, he has all the power tools, table saw etc, and I thought why not knock up the BIB's while we're at it. Dave was really impressed with both speaker types.

Comparing the CHR-70 Lotus to CHR-70 BIB, I have no realistic/concrete results. We built the BIB's last, so the drivers were less broken in than the ones in the Lotus, which weren't broken in either. Anyway we connected the BIB's to his system, previously we were listening to Lotus, and we both thought they sounded great, they weren't up against a wall as such and miles away from the ceiling, but still did a nice job. That was at night and one of them still had clamps on it. Next morning I selected a song for testing and listened to the BIB's and then swapped the Lotus back in. The Lotus had a bit less deeper bass, but the bass of the Lotus was more controlled, tighter bass. The Lotus high freq was stronger too. So the BIB's sounded great on rock'n'roll, real party animal "live sound" stuff, Deep Purple etc, and the Lotus was more impressive with clarity and the freq response more balanced. But there are a few big "buts", the BIB drivers had very little time on them, less time than the ones in the Lotus, and the BIB's were not optimally positioned either. As far as tuning/damping/stuffing goes on the BIB's, I put my ear in the open end and could hear up to the lower frequencies of the male vocals, so I'm not sure if that is enough stuffing in there? Is that 300Hz? Maybe over-damped? Both speaker types had very similar volume output for the same power input. After that quick comparison I had to drive home, and probably won't get back there for a while.

Although a long reply, it doesn't answer your questions very well, but early impressions are better than nothing I hope. Like italynstylion, I really love the Lotus. His are dual and beautifully finished, I think he inspired me to build mine, seeing the pics and report, thanks mate! It will be interesting to hear the BIB's with the HiVi M4N tomorrow, can't wait...and Planet10 has some interesting designs too...I bought a small table saw from ebay (Triton) a few days ago, I dunno whats going to happen from here on...
  Reply With Quote
Old 10th September 2009, 02:25 PM   #292
diyAudio Member
 
audiosteve's Avatar
 
Join Date: May 2004
Location: Niwot, CO
Thanks very much for your reply Ian. This is helpful information. If your impressions of the speakers changes with time, please let us know.

Cheers
__________________
Nihilism is best done by professionals.
  Reply With Quote
Old 10th September 2009, 05:26 PM   #293
chrisb is offline chrisb  Canada
diyAudio Member
 
Join Date: Aug 2002
Location: victoria BC
Not to belabour the "obvious", but something to keep in mind when comparing applications with single vs dual Mark Audio drivers (including CSS EL70 ) is the synergy of amplifier output stage with varying impedance load.

Not all SS amps and even fewer tube amps would be comfortable at "realistic" playing levels with under 2ohm load presented by a pair of these drivers in parallel, and many could exhibit different signatures at the (approx) 4 from a single and 8 resulting from series connection of dual drivers. Depending on the individual system, this could swamp the difference in acoustic performance between single and dual drivers.

Presumably a quality autoformer could render this issue moot, but that could equal the cost of some budget amps.
__________________
now on sabbatical

Last edited by chrisb; 10th September 2009 at 05:30 PM.
  Reply With Quote
Old 17th September 2009, 12:05 AM   #294
diyAudio Member
 
markaudio's Avatar
 
Join Date: Nov 2008
Hi Guys,
A quick note to let you know the new CHR-70 will be available soon. I've completed the production. The driver is updated with new cones (Multi-formed), revised coil and rear suspensions.

Here's a pic. I'll be back to the studio later next week so will post in the forum's new makers section.

Thanks,

Mark.
Attached Images
File Type: jpg CHR-70_new1.jpg (32.8 KB, 1311 views)
  Reply With Quote
Old 17th September 2009, 04:31 PM   #295
Toaster is offline Toaster  United Kingdom
diyAudio Member
 
Join Date: Jun 2004
Location: South East England
Ah- so is that why the grey ones are out of stock ATM? If they are coming out soon I'll transfer the currently in-play order to a pair of the new ones...
  Reply With Quote
Old 18th September 2009, 05:59 AM   #296
diyAudio Member
 
italynstylion's Avatar
 
Join Date: Feb 2009
Location: Dallas, Tx.
Quote:
Originally Posted by markaudio View Post
Hi Guys,
A quick note to let you know the new CHR-70 will be available soon. I've completed the production. The driver is updated with new cones (Multi-formed), revised coil and rear suspensions.

Here's a pic. I'll be back to the studio later next week so will post in the forum's new makers section.

Thanks,

Mark.
Mark, do we have any new TS paremeters for these? Also, how would you say the new design is better?
  Reply With Quote
Old 29th October 2009, 08:42 AM   #297
frugal-phile(tm)
diyAudio Moderator
 
planet10's Avatar
 
Join Date: Oct 2001
Location: Victoria, BC, NA, Sol III
Blog Entries: 5
I have just released the plans for a milliSized CHR-70 enclosure that debuted at the 6th Annual Vancouver Island diyFEST.

dave
__________________
community sites t-linespeakers.org, frugal-horn.com, frugal-phile.com ........ commercial site planet10-HiFi
p10-hifi forum here at diyA
  Reply With Quote
Old 29th October 2009, 09:09 AM   #298
diyAudio Member
 
markaudio's Avatar
 
Join Date: Nov 2008
Quote:
Originally Posted by italynstylion View Post
Mark, do we have any new TS parameters for these? Also, how would you say the new design is better?
Hi Steve,
Humble apologies for not replying sooner. Here's the link to the new CHR-70 thread in Markaudio section of Manufacturers, all T/S info there. I'd personally say the new multi-form cones are a nice step forward. Derek Shek (Miniwatt amp maker) and me were playing the new drivers in 10 litre BR's, Derek's tiny 2.5 watt with switching power supply - smooooooooth as silk with more detail, clarity. Derek knows both old and new drivers, got the big thumbs up for him for the new model.
Amazed at Derek's tiny 2.5. Thought it might struggle pushing the CHR's but it didn't. Played loud and clear, I learn something new every day.

Email me if you need more info - thanks

New CHR-70

Mark.
  Reply With Quote
Old 30th October 2009, 09:46 PM   #299
gychang is offline gychang  United States
diyAudio Member
 
Join Date: Feb 2005
Location: Davis, California
Quote:
Originally Posted by planet10 View Post
This might help

dave
Slick design Pensil70, thanks for clear drawing. What is the purpose of "simple filter"?

gychang
  Reply With Quote
Old 31st October 2009, 04:35 AM   #300
frugal-phile(tm)
diyAudio Moderator
 
planet10's Avatar
 
Join Date: Oct 2001
Location: Victoria, BC, NA, Sol III
Blog Entries: 5
I just copied Marks original drawing... looks like BSC.

dave
__________________
community sites t-linespeakers.org, frugal-horn.com, frugal-phile.com ........ commercial site planet10-HiFi
p10-hifi forum here at diyA
  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
need great smd cap for audio application jsaggio Parts 1 11th September 2007 04:41 AM
CV4014 and 5650 - any audio application of these tubes? cm Tubes / Valves 0 18th January 2007 01:03 PM
Additional application for audio amps... ashok Everything Else 8 17th August 2005 09:20 AM


New To Site? Need Help?

All times are GMT. The time now is 04:12 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