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Post by Deleted on Jan 26, 2010 22:26:10 GMT
Being a newbie on here I've no wish to fire the opening shot in WW3 but I am reliably informed that 'burn in' should help. Also, being a belt and braces man, all my gear is fed from a APC 1500va Smart UPS which I believe should minmise any effects that the mains supply may impart. I am no expert so I would defer on this point to other more knowledgeable and authorative opinions. I would also value opinions on that belief anyway and no, I am not aware that my mains supply is in any way less than it should be - I bought the UPS because it was ridiculously cheap (£10) and it might help and probably wouldn't do any harm. Polte comments cordially invited  . |
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Post by PinkFloyd on Jan 26, 2010 22:39:26 GMT
Being a newbie on here I've no wish to fire the opening shot in WW3 but I am reliably informed that 'burn in' should help. Also, being a belt and braces man, all my gear is fed from a APC 1500va Smart UPS which I believe should minmise any effects that the mains supply may impart. I am no expert so I would defer on this point to other more knowledgeable and authorative opinions. I would also value opinions on that belief anyway and no, I am not aware that my mains supply is in any way less than it should be - I bought the UPS because it was ridiculously cheap (£10) and it might help and probably wouldn't do any harm. Polte comments cordially invited . The filter is "passive" Dave. Equipment normally sounds better at night. Headphone listeners will find things sound better if they "blow their nose" occasionally. Mike. |
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Post by Deleted on Jan 26, 2010 23:37:09 GMT
Aye but from where pray tell? |
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Post by Deleted on Jan 27, 2010 6:20:47 GMT
@ Dave. the filter is custom made (configured) to suit the HD681's needs. It just has to take the edge off some specific frequency region and should not alter the sound signature of the HD681 (which I like).  the filter can ABSOLUTELY NOT be used on any other can as they have other impedances and frequency curves !!  The effect on each can will be very different and in 99% of the times will give bad if not undesired results !! Mike is right... There are NO parts in the filter that need any burn-in time. The filter won't go filtering more or differently over time. Your cans however do alter slightly over time. The biggest part of it in the first 100 hours as the membrane gets the proper stiffness (there is that word again) And at night we can listen much better than during the day. 3 theories on this: 1: it is more quiet in general at night and our ears and brain relax from all the noises during the day and thus function better. 2: During the day we don't hear a watch ticking for instance but in the evening you can hear it ticking from quite a distance. (if your hearing is still O.K.) When you have gone to a concert or disco and we step outside everything seems to have gone very quiet out there. This phenomenon stays for a while and then the 'automatic gain control' in your brain adjusts to the new 'average soundlevel'. At night (in general) the automatic gain control in your brain is set at 'maximum sensitivity' so to speak. 3: Has to do with our caveman ancestors. At night we can't depent on our vision anymore and thus other senses (hearing, smelling) becomes more 'active'. pick one or more ... each of them is good enough for me. Frans (Solderdude) |
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Post by derekrumble on Jan 27, 2010 8:36:28 GMT
Well, don't "excite" the bloody things..... ignore them and just listen to the fckin' music! I don't normally sit "twanging" rods when I'm listening to music..... do something else with your hands ;D My original post wasn't to do with with what happens when you twang them. I pointed out that the construction is clearly resonant and that plucking the rods serves to highlight the issue; damping this resonance with Blu-tack blobs seems to make the bass a little tighter. A little, but it's noticeable.. I think. If changing a plastic ring to aluminium can be considered an SQ upgrade then how about taking a look at possible benefits which may arise from taming an obvious resonance in the structure of the headband? Come on - take it seriously. Far far subtler effects have been debated in here and taken seriously. Surprised at your apparent closed mind here Mike. Regards, Derek |
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Post by derekrumble on Jan 27, 2010 8:40:09 GMT
But his beef is not with the electrical side of the rods though but a mechanical one. The rods vibrate and make a 'humming' noise when excited. This has no influence on the electrical path but it is annoying due to mechanical conduction of the sound which you can clearly hear. I tried grabbing hold of both rods whilst listening and couldn't tell any difference. If there is any mechanical transfer of sound its below my audio threshold. Thanks for taking this seriously. As I said I 'think' I can hear a change if I damp the headband with a few pieces of Blu-tack. But I know it's so easy to imagine a change if you want to hear one . Derek |
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Post by derekrumble on Jan 27, 2010 8:48:32 GMT
Hey guys.... WOW! You'll never bl**dy believe what I f*ck*n discovered. These 681s are great we all know but here's how to move them to another league entirely at no cost! Yeah man, no f*ck*n cost. It tightens the bass, widens the soundstage by a mile and somehow makes CD top-end as smooth and extended as SACD! Just 4 blobs of Blue-tack man! That's all it f*ck*n takes guys. Four blobs of freakin' Blu-tak and these 681s out-perform even 2000 buck 'statics. Man you gotta freak*n f*ck*n try this. Awesome shit man  I must give this a go next time I've got the fckin' blu-tak out  |
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robertkd
Been here a while! 
Electronics Engineer from sunny Queensland
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Post by robertkd on Jan 27, 2010 8:51:36 GMT
derekSo what your saying is you can literally pluck the wires that provide the spring force on the ear muff like a guitar. and I tried it on a pair of k271's and yep same deal, even though the wires have tubing over them! I think it is the way the wires are anchored to the housing, if you tie some elastic over the 2 wires at the centre it deadens the effect, I suspect anything that either dampens the the mass say some elastic, or anything that couples the 2 wires mechanically like a stiff bridge between the wires would do it,...
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Post by Deleted on Jan 27, 2010 8:52:08 GMT
@ Derek,  Perhaps you should take apart the whole HP and mount the cups on another headband that does not have the disadvantages of the original headband. This seems very easy to do as the earshells swivel mechanism is inside the cups so the headband just needs to hold them and does so with 1 thick screw. You would have to go dual entry or use a piece of cable from left to right. This seems to me as a lot more logical approach than trying to dampen a construction that has this property. Damping it to the point where it is totally 'inert' does not seem to be an easy task. Remember it is a cheap can ! ;D For better headbands you need totally different constructions. I personally seriously doubt just damping the headband will do much on the SQ... but ... I could be wrong. If the clamping force is altered by fiddeling with the headband, this surely will have sonic impact mostly on the bass. or.. try Roberts (great) idea of mounting the earpieces on the band using an insulating/damping construction. @ everyone who placed an order ... All pads and parts (except for the people who just placed their orders) are on their way |
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Post by derekrumble on Jan 27, 2010 9:06:49 GMT
@ Derek, Remember it is a cheap can ! ;D You are reminding ME that's it's a cheap can - and my 'tweak' is so hard to cost it's practically free! Would you perhaps point that out to ALL THE OTHER BOYS who are working their hairy little nuts* off to drag a little more performance out of them? New cables, aluminium rings, replacement ear pads, turning around bits of plastic with 'do not remove' on them, custom filters... have I missed anything? This forum is usually keen to test, observe, report and discuss. My headphone extension lead made out of mains cable attracted greater interest. Derek *still working at gettin' a proper 'Grotto' tone > repeat same picture, yep, same picture, of large breasted girls in camel toe shorts > |
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Post by andy on Jan 27, 2010 9:30:57 GMT
Looks as though Derek is having problems uploading pictures......
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Post by Deleted on Jan 27, 2010 9:39:20 GMT
I think you left nothing out. have not done all these mods myself (only pads and filter ) aluminum rings for aesthetic reasons will be done when Mick has kindly send me some (thanks Mick !) But you are alowed to do with them what you want AND I think it's great that you're putting in the effort AND share this with everyone. I just enjoy the HD681 as it is now and am very content with it... but that's only my view on it. perhaps other RG folks will mod their headbands too like you have and be pleased with it. I certainly do not mind if people do or do not like/use my filter mod or the AKG pads.. |
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Post by Deleted on Jan 27, 2010 11:04:55 GMT
Seeing Derek appears to be having a problem uploading his image, I have uploaded one for him. Not in shorts though. I wonder who the singer is ? ;D (click the photo, then click the larger photo)  |
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Post by andy on Jan 27, 2010 12:54:43 GMT
looks like you were front row at the concert?
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Post by Deleted on Jan 27, 2010 14:18:45 GMT
Looks like she's got a serious case of droopy draws. At least, I hope that's not her bum hanging down.  Ian |
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Post by Deleted on Jan 27, 2010 16:08:26 GMT
Maybe she needs some Superflaps modifications!
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Post by andy on Jan 27, 2010 20:42:28 GMT
an alloy bum holder?
well mick its over to you....
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Post by Deleted on Jan 27, 2010 21:18:41 GMT
Can think of a better means of support, in that area Andy, Hmmmmmmm!!!
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Post by andy on Jan 27, 2010 21:26:39 GMT
why is it that nearly every thread on this forum gets dirty very quickly?
It is somthing to do with listening to headphones?
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Post by PinkFloyd on Jan 27, 2010 21:36:14 GMT
why is it that nearly every thread on this forum gets dirty very quickly? It is somthing to do with listening to headphones? No no....... it's simply a fact that we are all perverts / misfits here..... when a topic starts to wane we start thinking of breasts / crotches and Blu-Tac ;D |
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Post by PinkFloyd on Jan 27, 2010 21:37:29 GMT
looks like you were front row at the concert? Looks like he was laying down under her with his camera pointed right up her snatch  |
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Post by andy on Jan 27, 2010 21:59:48 GMT
lol
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Post by Deleted on Jan 27, 2010 22:24:06 GMT
Is this wots known as 'Thread Drift' ;D ;D
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matt7941
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Mmmmmmm... Pork scratchings.....
Say cheese!!!!!
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Post by matt7941 on Jan 27, 2010 22:36:11 GMT
It reminds me of an old joke................... Vanessa Feltz was arrested today at Heathrow customs. She's been accused of attempting to smuggle 40 lbs of crack in her knickers.  Ok, its weak but its the best I can manage!  Matt |
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Post by andy on Jan 28, 2010 9:23:16 GMT
Spent a few mins fitting some of heliharris's and caps.
Look fantastic and i think i can hear a slight difference in the sound but not sure what yet.
They certainly feel better to wear now, they never felt hugely comfortable to me but that extra weight appears to help.
Just need to get some more muff to try!
Joining two therads but these sound really good with that little bravo amp.
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I must give this a go next time I've got the fckin' blu-tak out 
Perhaps you should take apart the whole HP and mount the cups on another headband that does not have the disadvantages of the original headband.
