CHR-70 G2 went down - CHP-70 G2 as replacement? - diyAudio
Go Back   Home > Forums > Commercial Sector > Manufacturers > Markaudio

Markaudio Designers and builders of audiophile grade drivers

Reply
 
Thread Tools Search this Thread
Old 26th December 2013, 03:42 PM   #1
Tom V is offline Tom V  United States
diyAudio Member
 
Join Date: Jan 2010
Default CHR-70 G2 went down - CHP-70 G2 as replacement?

I have a pair of Gen 2 CHR-70 gold drivers in my desktop speakers. Well one has apparently died, loud, totally distorted sound. Hadn't been abused, no signs of damage. Just one of those things I guess.

A quick eBay search didn't reveal any of the CHR-70 gen 2 for sale. Madisound currently only has the CHP paper drivers available.

How would the CHP-70 Gen 2 paper drivers work in these boxes? 9.5 Liter net. Downfiring BR Port 1.5" x 4" (38mm x 100mm)?

The online calculator I used for the original design is recommending a 3.14" (8cm) port. The boxes are sealed up tight so I don't have a good way of shortening the port.

Should I go ahead and order the drivers?
  Reply With Quote
Old 26th December 2013, 06:50 PM   #2
frugal-phile(tm)
diyAudio Moderator
 
planet10's Avatar
 
Join Date: Oct 2001
Location: Victoria, BC, NA, Sol III
Blog Entries: 5
CHP should work fine. Tuning may not be quite as optimal. Quite the change from CHR sonically.

In Scott's ML-TLs CHP/CHR are considered interchangable.

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 26th December 2013, 07:02 PM   #3
Tom V is offline Tom V  United States
diyAudio Member
 
Join Date: Jan 2010
Default I'll order them

I wanted to hear the differences between the metal and paper drivers anyway.

About the tuning, the longer port makes them tuned to low?? What about stuffing the port with large bubble straws, to make for a more constricted/more aperiodic port? Would that take them in the wrong direction?
  Reply With Quote
Old 26th December 2013, 07:24 PM   #4
frugal-phile(tm)
diyAudio Moderator
 
planet10's Avatar
 
Join Date: Oct 2001
Location: Victoria, BC, NA, Sol III
Blog Entries: 5
I'd have to look at my sims to give a definitive answer. It is easy enuff to retune lower. Tuning higher is harder.

I'd start with boxes as is. Then you can play.

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 26th December 2013, 10:23 PM   #5
diyAudio Member
 
markaudio's Avatar
 
Join Date: Nov 2008
Quote:
Originally Posted by Tom V View Post
I have a pair of Gen 2 CHR-70 gold drivers in my desktop speakers. Well one has apparently died, loud, totally distorted sound. Hadn't been abused, no signs of damage. Just one of those things I guess.

A quick eBay search didn't reveal any of the CHR-70 gen 2 for sale. Madisound currently only has the CHP paper drivers available.

How would the CHP-70 Gen 2 paper drivers work in these boxes? 9.5 Liter net. Downfiring BR Port 1.5" x 4" (38mm x 100mm)?

The online calculator I used for the original design is recommending a 3.14" (8cm) port. The boxes are sealed up tight so I don't have a good way of shortening the port.

Should I go ahead and order the drivers?
Hi Tom,
I recommend you replace your CHR G2's with the G3-A's. These drivers have the built-in Arrestor over-load protection device, so better suited to heavier load situations (within reason as the CHR is a small driver). The very latest units have also have up-graded connector sets - see pics.

Happy new year!
Mark.
Attached Images
File Type: jpg CHR70A-champ-front.sml.jpg (75.1 KB, 204 views)
File Type: jpg CHR70A-champ-rear-conn-sml.jpg (124.8 KB, 201 views)
  Reply With Quote
Old 27th December 2013, 06:50 AM   #6
Tom V is offline Tom V  United States
diyAudio Member
 
Join Date: Jan 2010
Default I would have,

If Madisound had them available. As it is a week without my Alpair desktops is a week too long!

This way I get to hear one of the paper drivers and decide if I like the sound.
  Reply With Quote
Old 30th December 2013, 01:01 AM   #7
diyAudio Member
 
Join Date: Nov 2013
Location: NYC
Quote:
Originally Posted by Tom V View Post
If Madisound had them available. As it is a week without my Alpair desktops is a week too long!

This way I get to hear one of the paper drivers and decide if I like the sound.
so you know DIY Speaker Components | Replacement Speakers | and Speaker kits from Meniscus Audio Group does have G3 in stock... i just ordered a pair of the copper
  Reply With Quote
Old 30th December 2013, 06:12 AM   #8
Tom V is offline Tom V  United States
diyAudio Member
 
Join Date: Jan 2010
Default Good to Know!

Too late for me, the CHP-70 from Madisound will arrive tomorrow. I will post my impressions.

But good to know there is a second US source of the Markaudio drivers.
  Reply With Quote
Old 8th January 2014, 10:30 PM   #9
Tom V is offline Tom V  United States
diyAudio Member
 
Join Date: Jan 2010
Well it wasn't the driver. And not the amp either! I don't know what the problem was - a bad connection?

Anyway the CHP-70's arrived. I pulled the CHR desoldered the connection, soldered on push on connectors and installed the new driver. Still breaking up! Put it aside for a few days and today tested the amps (OK), the CHP-70 (still breaking up), took out the CHP and put the old CHR back in. Everything is fine! So the speakers with the original drivers are back on my desk. WTF?!?

So invent a new project or return the CHP's to Madisound. (Probably the best course - I don't need THREE sets of uninstalled drivers in the basement.)

Just wanted you to know Mark - not a problem with the CHR-70.2. And I got music again!
  Reply With Quote
Old 8th January 2014, 10:58 PM   #10
frugal-phile(tm)
diyAudio Moderator
 
planet10's Avatar
 
Join Date: Oct 2001
Location: Victoria, BC, NA, Sol III
Blog Entries: 5
I have had the same issue you described when one of the CAT 5 wires got caught between magnet & holly brace.

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
Markaudio CHP-70 a good replacement? gilstone Full Range 8 5th November 2012 03:56 PM
CHP-70, CHR-70 package size & weight nightuser Markaudio 11 14th March 2012 08:45 PM
chr-70 vs. chp-70? Sonogasm Full Range 10 26th November 2011 05:02 PM
CHBW-70 and CHP-70 mixed in a Lotus^2 cabinet KrunktheMadMan Full Range 1 29th August 2011 06:07 PM
CHR-70, CHP-70, Alpair 7 Desktops - Japan markaudio Full Range 4 1st February 2010 01:42 AM


New To Site? Need Help?

All times are GMT. The time now is 02:44 PM.


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