|Digital Source Digital Players and Recorders: CD , SACD , Tape, Memory Card, etc.|
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
||Thread Tools||Search this Thread|
|31st October 2012, 11:34 PM||#1|
Join Date: Dec 2008
Cambridge Audio CD4 Special Edition - Help
I have recently acquired a CD4SE in good working order, I cant leave anything alone for more than a minute and have done a few mods already!!! i.e.
Dampened the case.
Upgraded the p/s caps to Panasonic FC with 100nf bypass.
I have also whipped out the AD711 op amps and replaced them with some LT1128 types.
So far having listened to it it does sound a great deal more open/airy and there also seems to be more bass weight, not overpowering though.
now my question is does anyone know if the LT1128 op amp is suitable in this circuit? as the original AD711 is a fet based type and i believe the LT1128 to be bipolar??? Do I need to change any of the surrounding components, resistors or op amp supply capacitors, originals being 47uf 10volt sanyo os-con.
I cant find much info on the CD4SE so any help would be greatly appreciated.
|1st November 2012, 02:00 AM||#2|
Join Date: Jan 2003
Location: mississauga ontario canada
If you like the sound better than the original design then keep it like that.
If you don't then change it back or keep modifying it.
Back in the days when CRT TV's had a vertical sync adjustment and separate colour adjustments a customer was not happy with the colour balance that the tech (TV repairman) was presenting to her.
"This was too red, that is too blue, no, that is not right"
The tech decided to giver her more options.
Adjusting the vertical hold pot made the picture roll and he told her to pick the colour combination that she liked the best.
She did and he stopped the roll.
She was happy with the results.
Moral of story:
If you think it is OK then it is OK.
Doug We are all learning...we can all help
"You can't stop the signal, Mal. Everything goes somewhere..."
|1st November 2012, 02:25 AM||#3|
Join Date: Nov 2003
Location: Brighton UK
I have a CD4SE and other than fitting sorbothane feet it is bog standard.
Info is hard to find as its a one-off design, not like the basic CD4 at all.
I like the balance of the sound and don't really want to mess with it,
its not perfect, but its very good, with great overall presentation.
I can't see the op-amp substitution helping much if at all, YMMV.
Caps I can - might be worth doing in a few years if its still going.
|Thread Tools||Search this Thread|
|Thread||Thread Starter||Forum||Replies||Last Post|
|wanted cambridge audio cd4 service manual||pecello||Digital Source||2||7th May 2016 12:50 PM|
|Cambridge Audio CD4||audiolabtower||Digital Source||0||30th August 2010 05:09 PM|
|FS: Golden Tube Audio SE-300B II Special Edition Valve Amplifier||coh-b-pyky||Swap Meet||1||24th April 2010 09:31 PM|
|Von Schweikert Audio, VR9 Special Edition Loudspeaker||lineup||Group Buys||7||23rd November 2008 07:54 PM|
|115v conversion fro 230V Cambridge Audio CD4 and Dacmagic 2i||taskerc||Digital Source||4||7th February 2006 08:02 PM|
|New To Site?||Need Help?|