Jump to content
The Classic Speaker Pages Discussion Forums

djcheung

Members
  • Content Count

    278
  • Joined

  • Last visited

Community Reputation

0 Neutral

About djcheung

  • Rank
    Advanced Member

Profile Information

  • Gender
    Male
  • Location
    Cambridge, UK

Recent Profile Visitors

2,344 profile views
  1. Hi all, after going through the steps suggested, I think I may have tracked down which bit is causing the buzzing noise. 1. Connect power amp to speakers only, no buzz 2. Connect preamp to power amp and speakers, no buzz 3. Connect a cd player to preamp, power amp and speakers, buzz..... even with the power off on the cd player. Remove the cd connection ,then no buzz. So it looks like that it is the connections before the preamp ! I do have a simple 'ground loop isolator' and I swear that it didn't reduce the buzzing noise when I tried it before. I think I must have connected it to the wrong point. I have now connected it between the source and the preamp all all very quiet, no buzzing noise. Thank you all very much again. Now I can go back and enjoy some quiet quality music. Best regards, David. Hi all again, After doing some not digging around and think I have found the real culprit of the source of the buzzing noise. Following Carnivore's direction of investigation, I have identified that the power block - Tacima CS947 - is the source of the interference. I have now replace the power block and the ground loop isolator and all are quiet . Thanks very much for all your help. I can now stay 'budget' for a little longer. Best regards, David.
  2. Hi all, after going through the steps suggested, I think I may have tracked down which bit is causing the buzzing noise. 1. Connect power amp to speakers only, no buzz 2. Connect preamp to power amp and speakers, no buzz 3. Connect a cd player to preamp, power amp and speakers, buzz..... even with the power off on the cd player. Remove the cd connection ,then no buzz. So it looks like that it is the connections before the preamp ! I do have a simple 'ground loop isolator' and I swear that it didn't reduce the buzzing noise when I tried it before. I think I must have connected it to the wrong point. I have now connected it between the source and the preamp all all very quiet, no buzzing noise. Thank you all very much again. Now I can go back and enjoy some quiet quality music. Best regards, David.
  3. I know LST and budget cannot be spoken in the same sentence ! I have tried swapping out the LST with a pair of 3a and the buzz is still there. However, if I use an integrated amp then they are dead silent. The integrated amp that I have tried - Pioneer SA-508 and Yamaha DSP-Z11. The Pioneer is obviously very under powered , the Yamaha is much more powerful but it does get a bit warm. I am using the Yamaha to drive a pair of 9s. A Mcintosh will definitely fits the bill but way over my budget. As some other guru here use the Adcom but they are rather difficult to get hold of here in the UK. I am trying to see if I can make the best use with the equipment I have before spending . Best regards, David.
  4. Hi there, It's been a long time since I last visited. I have a question and need some recommendation on a preamp for my setup on the LST. I have a Crown XLS2502 which sounds good for the LST when connected with the AR-C06 preamp, but it has a constant buzzing noise on both speakers. Tried with the Xiang Sheng 728a preamp, the buzzing noise has improved but now they sound very thin on the bass. Looking for a reasonable preamp on a budget that could work well with the Crown and LST ! Any information is much appreciated. Best regards, David.
  5. I can't remember exactly where I bought them from but these are exactly the same items. https://www.aliexpress.com/store/product/New-20-pieces-19-43mm-4-ohm-19-43-mm-Without-diaphragm-Tweeters-speaker-voice-coil/508259_32812762272.html?spm=2114.12010612.8148356.49.6caf5ef17HvQ0H or these https://www.aliexpress.com/store/product/10-piece-19-43mm-1-silk-diaphragm-dome-Tweeters-voice-coil-4-ohms-100-new/508259_32271734227.html?spm=2114.12010612.8148356.3.6caf5ef1saAQif
  6. Hi Ferguson, I was working on one similar molested woofer sometime ago and it took me over 5 days picking on the silicon bit by bit. Just take your time and you will get there eventually.
  7. I repaired a pair of 94er sometime ago. The surrounds were indeed on top of the cones and not under. The picture below shows the before image.
  8. Checked the allen key last night, and the best fit I used was the 1/16. I have a problem uploading the picture of the key set. It is made by Draper
  9. I removed the knob using the smallest allen key that I have. It will loosen them with no problem. I can't remember the size. I will check it when I get home this evening.
  10. Hi Adam, Have you checked to make sure that the inside of the pot actually connecting to the outside terminals ? It has happened to me on one occasion after cleaning the pots, they look perfect, but the middle terminal somehow separated slightly from the metal disc inside. I had to put a bit of solder to make good contacts. Congratulations on getting the AR3a as I know they are hard to come by in the UK where I am also located.
  11. The overall height of my stands is just under 21". The legs are made from 2x4 timber and 1" plywood for the top and 2 x 1" plywood for the bottom. I used the leftover materials that I have but obviously you can go with much better wood timber like oak and others. I have painted mine black to match the cabinet colour so it doesn't really matter what type of wood but as long as they are strong enough. Those stands can take my weight with no problem. I have also used some sort of thin carpet tiles - the ones with a soft plastic backing - to go underneath the stand, plastic side down on wood flooring so that you can shift them with ease while trying to find the best location for them.
  12. Welcome Jimmie, Have you tried turning the midrange control back and forth and see if you get any output ? They do go rusty .
  13. This is my AR14 that I refoamed some years ago. I still haven't done anything with the disintegrated foam grills yet. Mostly will make up something using a wooden frame.
  14. As I type, I am listening to the LST with the Xiang Sheng 728a preamp and the Crown xls2502 with the old Sony DVP-S7000 dvd player. With average materials, you sit and think, okay! But with good clear recording, my ears just stood up and WOW, what was that !!! But at the same time, a lot of my old cd have now been packed up and most likely be disposed of. If you can get a sample of the cd I am listening (sorry, in mandarin), you will 'hear' what I mean. Best regards, David.
  15. Hi all, Just had some time today to put a couple of coats of black paint on the stands. They look much better than the original bare timber. The stands now look better matched to the cabinets. Hi Ra.ra, this is my first attempt on the stands, when I gain more woodworking skills, I will try other variations. The stands shown are very similar to John's (xmas111). Best regards, David.
×
×
  • Create New...