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| [#1] QUAD ESL speaker Does anyone know any people in HK to perform checking and service for ESL speaker. The sound level of my of one speaker is much lower. The good news, the charity and tonal balance is still there and we suspect the problem is due to aged electronic part badly needing replacement. The shipping cost is too high if sending to Germany or UK. Please advise me if you have any idea: dkyyu@yahoo.com.hk Dennis |
dkyyu 正式會員219.xxx.xxx.87 |
2005-09-04 13:59 | |
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| [#2] QUAD ESL speaker Can't recommand a repair shop. But there is not much in a ESL. You did not say which esl it is. I would check the EHT supply first. |
stevey888 正式會員 24.xxx.xxx.187 |
2005-09-05 05:51 |
| [#3] QUAD ESL speaker Some electrostatic speakers attract dust which may weigh down the diaphram and reduce the output level. You can try to vacuum it through the grill. Make sure you turn it off overnight to discharge it first. |
olddude 正式會員 219.xxx.xxx.206 |
2005-09-05 09:54 |
| [#4] QUAD ESL speaker I met a gentleman living in 將軍澳 several months ago who is an expert & fanatic in Quad ESL. He is an aeronautical engineer & repairs his own ESL, he even knows how to replace the mylar film but unfortunately I lost his contact. |
nicknick 正式會員 203.xxx.xxx.126 |
2005-09-05 10:09 |
| [#5] QUAD ESL speaker Thanks, Stevey888, My ELS are the original ESL57 probably made in year 1971. I guess one the speaker badly needing EHT replacement or some electrical component changes. Can anyone in Hong Kong provide such a service? Regards Dennis |
dkyyu 正式會員 218.xxx.xxx.50 |
2005-09-05 10:10 |
| [#6] QUAD ESL speaker Thank you, olddude and nicknick, Will try tis weekend. Regards dennis |
dkyyu 正式會員 218.xxx.xxx.50 |
2005-09-05 10:11 |
| [#7] QUAD ESL speaker The Quad ESLs has a dust cover to prevent the dust from getting to the mylar. If the dust cover is OK, there will be no dust on the mylar. But if it is torn or loose, you will hear rattles when you play music. So I think your dust cover is OK. Visit the web site below to get some suggestions. Sheldon Stokes' site is particularly useful. If you can not do it your self, may be you can find some one to do it for you. I think you shold change the EHT unit for both side if you want to keep the units. I own a pair of ESL63 with the Crosby mod. http://www.eraudio.com.au/Kits/kits.html http://www.quadesl.com/quad_ref.shtml |
stevey888 正式會員 24.xxx.xxx.187 |
2005-09-05 11:37 |
| [#8] QUAD ESL speaker I have more thought on your problem. Because you did not get any rattle sound, so the mylar should be OK and do not have holes that are caused by arc-over. I bet the problem is the EHT circuit. |
stevey888 正式會員 24.xxx.xxx.187 |
2005-09-05 11:44 |
| [#9] QUAD ESL speaker DIY? http://www.quadesl.org/Fixit_/ServiceManual/servicemanual.html  |
vt75 正式會員 219.xxx.xxx.229 |
2005-09-05 13:13 |
| [#10] QUAD ESL speaker .  |
vt75 正式會員 219.xxx.xxx.229 |
2005-09-05 13:19 |
| [#11] QUAD ESL speaker .  |
vt75 正式會員 219.xxx.xxx.229 |
2005-09-05 13:26 |
| [#12] QUAD ESL speaker The EHT block is easy to make. If you have the later version with them covered in beeswax, you can just melt it and replace the diodes. If you have the old one with the block encased in epoxy, you can easily fabricate one with cheap parts. You can check the voltages if you have a high voltage probe so you can verfiy if thelow output is from the EHT or a leaky panel. |
mozilla 正式會員 203.xxx.xxx.140 |
2005-09-05 15:57 |
| [#13] QUAD ESL speaker Dear all, What more can I say, all of you have been very kind indeed giving me advice. I think I can summarise the action plan: 1) order diodes for the EHT, I think there are 8 on one side. 2) I am not a electrical man, so I need someone to handle the replacment job. Otherwise, I am pretty sure the high volrage will kill me. Now, any one in Hong Kong who can sell me the diode and perform the service job for me? Should I post the request in second hand market? |
dkyyu 正式會員 219.xxx.xxx.211 |
2005-09-05 18:55 |
| [#14] QUAD ESL speaker service I met a gentleman living in 將軍澳 several months ago who is an expert & fanatic in Quad ESL. He is an aeronautical engineer & repairs his own ESL, he even knows how to replace the mylar film but unfortunately I lost his contact. Hello, If you were this gentleman, will you consider to give me a hand. My e-mail: dkyyu@yahoo.com.hk Dennis |
dkyyu 正式會員 203.xxx.xxx.173 |
2005-09-06 00:33 |
| [#15] QUAD ESL speaker service How about calling Quad's HK distributor and see if they can point you in the right direction? Someone there must know ESL repair since they have to perform warranty repair for the current ESL lineup. SANECORE LIMITED MS. REGINA WONG +852-25819332 +852-25819717 reginahk@sanecore.com |
vt75 正式會員 219.xxx.xxx.229 |
2005-09-06 00:41 |
| [#16] QUAD ESL speaker service Dennis, do watch out ebay. the EHT block on and off come out for sale from the same seller (from Europe but i couldn't remember the name). |
rsbn589 正式會員 61.xxx.xxx.100 |
2005-09-06 00:43 |
| [#17] QUAD ESL speaker service dkyyu, Why don't you swap the EHT block between left and right to see the difference, if they are not potted with epoxy. You should change both left and right EHT block diodes and capacitors, no just the diodes. |
stevey888 正式會員 24.xxx.xxx.187 |
2005-09-06 01:25 |
| [#18] QUAD ESL speaker service The diodes and the resistors on the EHT block are the first to drift. The capacitors rarely do but you might as well change them to be sure. There are 16 diodes, 8 ceramic caps & 2 resistors per block. Sometimes the voltages in the EHT block are ok but it's a leaky panel that's causing the low sensitivity. Check both. |
mozilla 正式會員 203.xxx.xxx.140 |
2005-09-06 08:58 |
| [#19] QUAD ESL speaker service Thanks a million again for all your valuable advice. Will follow. First thing I must do is to seek for a pair of experienced hands in HK. One more question, how far you place your ESL speakers apart and any suggestion of speaker distance from rear and side wall in order to obtain the best stereo sound stage and focus. PS: It appears we have a group of genuine ESL expert and real users in Hong Kong. Hope to meet you and your ESL someday perhaps in very near future. Dennis |
dkyyu 正式會員 203.xxx.xxx.181 |
2005-09-06 23:18 |
| [#20] QUAD ESL speaker service http://www.geocities.com/drquad@pacbell.net/listening.html "Dr.Quad's tips on listener & speaker positioning How are your Quad rears today? Take some time to make sure the loudspeakers are at least 2 feet from the rear wall & that the outer ends are angled (see drawing below) toward you. This positioning will give smoother bass response in the two octaves from 60Hz-240Hz & better high frequencies, at least on axis. The sound stage between the Quads should be better defined too. All right then, what about the front of the esl? I like a near field listening position for two reasons: 1) the closer one is to the loudspeaker the less the room intrudes and, 2) the Quad is virtually seamless enabling the listener to move surprisingly close to the speaker's grill. Taking into account the narrow sweet spot (caused by mediocre high frequency dispersion), I prefer 7 feet from the center of each esl to the listener. This dimension is based on a stereo spread of about 6' or so from treble panel to treble panel. I hope this increases the boundaries of Peter Walker's famous "window on the orchestra" for you."  |
vt75 正式會員 220.xxx.xxx.20 |
2005-09-07 01:53 |
