I would like to see if this document is indeed available in the public domain like the older ELS 63 does.
I have recently adopted a pair of 2905 and would like to conduct a health check on it. This is of the 2010 vintage and about time due for a glue failure, as I understand. No pop and click at the moment, on some heavy bass passage, the right sided one exhibits some sound of lose dust cover.
The things looks too sexy and new to fool around, so I want to be a little more prepared and do things right first time. I break in ESL 63 and 57 fine as I was shown by some strong hands in-the-know before.
Thanks. zoltm.
I have recently adopted a pair of 2905 and would like to conduct a health check on it. This is of the 2010 vintage and about time due for a glue failure, as I understand. No pop and click at the moment, on some heavy bass passage, the right sided one exhibits some sound of lose dust cover.
The things looks too sexy and new to fool around, so I want to be a little more prepared and do things right first time. I break in ESL 63 and 57 fine as I was shown by some strong hands in-the-know before.
Thanks. zoltm.
I will post the doc tomorrow. I have it, but need to go to bed. : )
Has anyone else thought of milling out the steel 'barrier' grill to the perimeter to
remove phase/delay/diffraction smearing the sound? This is bothering me, and the vibration/low level woofer that the (particularly central) grills' presence entails.
I do not believe the steel 'barrier' grill itself has anything to do with damp-en-ing the diaphragm resonance itself.
What I cannot figure out is weather the dustcover is salvageable
I'd like to mill out all but 2.75 ~3.5 from the perimeter. This would maintain the longevity (ability to easily/potentially conveniently move the speaker and damping (superstructure)
Has anyone else thought of milling out the steel 'barrier' grill to the perimeter to
remove phase/delay/diffraction smearing the sound? This is bothering me, and the vibration/low level woofer that the (particularly central) grills' presence entails.
I do not believe the steel 'barrier' grill itself has anything to do with damp-en-ing the diaphragm resonance itself.
What I cannot figure out is weather the dustcover is salvageable
I'd like to mill out all but 2.75 ~3.5 from the perimeter. This would maintain the longevity (ability to easily/potentially conveniently move the speaker and damping (superstructure)
Been driving without grill and dustcovers for many years... since 1994 (my first pair)
The grill cloth could be stretched or changed protecting small fingers to interact with sensitive stator panels...
The grill cloth could be stretched or changed protecting small fingers to interact with sensitive stator panels...
Hello Hennyo,
I also need a Service Manual for ESL-2905, there is heard a chirping sound at 2/3 of a height without any signal.
Maybe punching high voltage, damaged diafragma?!
Thnx in advance
Regards.
Robert
I also need a Service Manual for ESL-2905, there is heard a chirping sound at 2/3 of a height without any signal.
Maybe punching high voltage, damaged diafragma?!
Thnx in advance
Regards.
Robert
ESL 29/805 Service Manual
Somebodys been reviewing (editing) my posts Carl; I'm not gonna say who.. but somebody has. 😀 [On an even lighter, more buoyant note thanks for hosting -us- diya]
The 8/95 share the same spreadsheet I've had the 805' for 5 months.
I believe the 12s' separate/demarcate. There were a few other things.. One which was sought affirmation of such 'curiously' notable cause by means of deviation between the 989/2805 csdecays' as measured by John Atkinson; and then likewise you have -to strengthen the point-, where despite different/varying equipment, the Q-63:989 also measures remarkably similarly]. I believe/appears to me most likely causes
are the mass-quasi"damped" nature of the 805' shifting FR, or two) simply the room itself.. Don't remember the others..
Thought I'd go for sharing a pdf link, but turns out I'll share the screenshots..
Somebody else can piece them together/convert to pdf.
Thanks for collating the [Quad datasheet or user manual] compendium here. Seems like a good idea..
The ~8Kg collars (collar locking bars), and 'securing brackets' aren't referred to in the service manual (as they are in the user manual). For those unfamiliar, these 'lead weights'.
And just out of curiosity if you guys could lemme/us know why you're piddling with your recent series Quad and/or post photos I'm certain many would appreciate it;
My interpretation {confirmed from Huntingdon engineer..} was the dustcovers, the grand majority of the time may come loose due to movement (mis/heavy-handeling). q.e.d. I've driven from LA to Park City while the speakers (were) laterally boxed with the strut tension loosed without any problem!
Somebodys been reviewing (editing) my posts Carl; I'm not gonna say who.. but somebody has. 😀 [On an even lighter, more buoyant note thanks for hosting -us- diya]
The 8/95 share the same spreadsheet I've had the 805' for 5 months.
I believe the 12s' separate/demarcate. There were a few other things.. One which was sought affirmation of such 'curiously' notable cause by means of deviation between the 989/2805 csdecays' as measured by John Atkinson; and then likewise you have -to strengthen the point-, where despite different/varying equipment, the Q-63:989 also measures remarkably similarly]. I believe/appears to me most likely causes
are the mass-quasi"damped" nature of the 805' shifting FR, or two) simply the room itself.. Don't remember the others..
Thought I'd go for sharing a pdf link, but turns out I'll share the screenshots..
Somebody else can piece them together/convert to pdf.
Thanks for collating the [Quad datasheet or user manual] compendium here. Seems like a good idea..
The ~8Kg collars (collar locking bars), and 'securing brackets' aren't referred to in the service manual (as they are in the user manual). For those unfamiliar, these 'lead weights'.
And just out of curiosity if you guys could lemme/us know why you're piddling with your recent series Quad and/or post photos I'm certain many would appreciate it;
My interpretation {confirmed from Huntingdon engineer..} was the dustcovers, the grand majority of the time may come loose due to movement (mis/heavy-handeling). q.e.d. I've driven from LA to Park City while the speakers (were) laterally boxed with the strut tension loosed without any problem!
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Thanks for sharing the ESL2905 screen shots. 🙂
It looks like we are missing about a 1" wide section of the middle portion of the schematic.
If you can post that, I'll stitch the pieces together and post as one image.
ESL 29/805 Service Manual
I skimmed through it and omitted the "assembly parts" list; ordered after the electrical schematic. Thanks bolserst.
The unlabled "1' wide portion" -in exploded schematic- ...is very much what Quad apparently circulates: this pdf also affected their new American distributor; A bit obnoxious? [The UNLISTED locking collar/securing bracket is also confounding; why Screenshots were attached to facilitate liaison/procurement] Guess it would be great if I labeled the parts. 🙁
Particularly as/when the No. 14:13 conjugation bits (steel rod/"Strut through bolt" conjoin cowling/tensioning apparatus) are some of the most likely parts to 'break' (or emasculate) by presumably developing thread/tap meld/conjoining degredation.
So Suffice You really don't want to touch/or bump that Alu Strut/steel rod and bend it beyond modulus. To do this often spells bad news for No. 24, the 'Strut Ball Joint.'
In mine, for example the extrusion (No. 10 - AL Strut) is robustly -comparatively- fine; the rod (and by extension No.13 cowling) not so much. My particular "cowling to Strut Ball Joint" mate subsequently/coterminously is also affected just enough to mind.
If that's rather dull I err, share your compunction.. Attempting to be helpful, diplomatic..
The unlabled "1' wide portion" -in exploded schematic- ...is very much what Quad apparently circulates: this pdf also affected their new American distributor; A bit obnoxious? [The UNLISTED locking collar/securing bracket is also confounding; why Screenshots were attached to facilitate liaison/procurement] Guess it would be great if I labeled the parts. 🙁
Particularly as/when the No. 14:13 conjugation bits (steel rod/"Strut through bolt" conjoin cowling/tensioning apparatus) are some of the most likely parts to 'break' (or emasculate) by presumably developing thread/tap meld/conjoining degredation.
So Suffice You really don't want to touch/or bump that Alu Strut/steel rod and bend it beyond modulus. To do this often spells bad news for No. 24, the 'Strut Ball Joint.'
In mine, for example the extrusion (No. 10 - AL Strut) is robustly -comparatively- fine; the rod (and by extension No.13 cowling) not so much. My particular "cowling to Strut Ball Joint" mate subsequently/coterminously is also affected just enough to mind.
If that's rather dull I err, share your compunction.. Attempting to be helpful, diplomatic..
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