voa
valued member
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Post by voa on Jan 9, 2018 11:28:02 GMT
Thanks for the tip, but we are talking about a hole covered with some paper-like material, in the prototype. It's just that i'm not sure of what to put on that, because i want to replicate solderdude's job, before think of try something different. www.soomal.com/pic/20100005739.show.htm If it's something like that, than try duct tape and see for yourself what it will change. Maybe it will give you same benefits from that mod. : )
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Post by superluc on Jan 9, 2018 11:37:57 GMT
I also need to experiment how much fillering put in the cups, so i think it's better so solve the hole's dilemma, before doing that.
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solderdude
Administrator
measureutternutter
Posts: 4,881
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Post by solderdude on Jan 9, 2018 11:46:46 GMT
In a week or so I should have the production version and can see/measure/listen what differs. Stock the HD688 had huge subbass and a treble spike but were already listenable.
I wonder what they changed, looks like they lowered the bass levels and made new pads. They also changed HD681EVO pads to more leaky versions later on.
Anyway in a week or so I may have an idea what the mods for the production version will be. Looks like the protomodding guide is not relevant any more. Will have to do this all over again for the production model and see if the driver quality is still the same. Looked very experimental in the prototype. Maybe during production they cut corners and the driver is also less ?
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voa
valued member
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Post by voa on Jan 9, 2018 12:00:19 GMT
If you use different source and also have a little different hearing than Solderdude some mods may not suit your needs the best. Who can tell better than you what amount and quality of bass do you want etc. Maybe he came up with much better solution but right now the best you can do is experiment yourself and some mods are easy to apply and reversible. Solderdude they should just hire you and listening to everything Tell them that they are wrong and you are right.
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Post by superluc on Jan 9, 2018 12:09:18 GMT
I can say that the unexpected drop above 16Khz you have talked about in the proto appear the same to me, doing an audiocheck.
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Post by superluc on Jan 9, 2018 12:16:19 GMT
If you use different source and also have a little different hearing than Solderdude some mods may not suit your needs the best. Who can tell better than you what amount and quality of bass do you want etc. Maybe he came up with much better solution but right now the best you can do is experiment yourself and some mods are easy to apply and reversible. I already know that. On my 681 Evo i have do the half felt mod at start, following Soldedude's advice, then i have removed it and do the same thing with toilet paper. Half on driver (fixed with tape without cover the holes around), plus another ply over everything, liking that better. There's no need to rush.
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voa
valued member
Posts: 5
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Post by voa on Jan 9, 2018 12:29:49 GMT
I wonder what they changed, looks like they lowered the bass levels and made new pads. I don't think they changed so much in these headphones and uncovering that hole probably reduce bass so much. When I moded hi2050 covering 40% of that hole with duct tape gives me the best balance between bass and mids. 50% was more punchy and gives me more pleasure but it was starting covering mids. When I duck taped that hole compeletly bass was overblowing everything. Cover that hole and BAM bass is back.
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solderdude
Administrator
measureutternutter
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Post by solderdude on Jan 9, 2018 12:44:11 GMT
I'll know in a week or so.
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Post by psych0 on Jan 9, 2018 12:56:07 GMT
I am really happy with the 688. Yes, in stock form they need some modifications so that's why i will wait for solderdude's advice - after thousands of forum pages and many wasted hours he's the only whose ears i trust and whose general preferences are similar to mine (him and a few other on this forum).
Don't mind superlux build quality, never had any issues with any of their headphones (681 x3, 681 evo, 662 evo). Can use them all day long without any comfort problems, but i know some can't. Do i wish they were as comfortable as HD650? Obviously. Vocals are superb to me, with some EQ to reduce bass on some tracks; on others, it's not needed or not as much. I'm sure with mods they will be great.
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Post by superluc on Jan 9, 2018 13:08:29 GMT
Vocals are superb to me, with some EQ to reduce bass on some tracks; on others, it's not needed or not as much. I'm sure with mods they will be great. Agree. I don't doubt the quality.
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Post by superluc on Jan 9, 2018 16:03:18 GMT
solderdude : This type of paper tape can do the same kind of seal of that paper-veil over the holes ? Medical paper tape look more alike: What do you think ?
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Post by miiksu on Jan 9, 2018 20:10:30 GMT
I am really happy with the 688. Yes, in stock form they need some modifications so that's why i will wait for solderdude's advice - after thousands of forum pages and many wasted hours he's the only whose ears i trust and whose general preferences are similar to mine (him and a few other on this forum). Don't mind superlux build quality, never had any issues with any of their headphones (681 x3, 681 evo, 662 evo). Can use them all day long without any comfort problems, but i know some can't. Do i wish they were as comfortable as HD650? Obviously. Vocals are superb to me, with some EQ to reduce bass on some tracks; on others, it's not needed or not as much. I'm sure with mods they will be great. Vocals are quite fine, Airy. I added some photo print paper (donut shape) to cover the holes on front side. Much better. More solid.. But this definetely needs bass mod. Cups are too light material and resonates bretty much. I'm gonna add plasticine inside the cups, I did that too to HD662F. Also these need better ear pads like Brainwavz XL sheepskins, fits like a glove And I was so damn suprised of sound stage / details. I did not expect to be this good.
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garyc
contributing
Posts: 45
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Post by garyc on Jan 9, 2018 22:21:32 GMT
Now for the weird part - i changed the pleather pads and their thin cloth with the HD662 velour pads with their 2mm foam disc and the bass/subbass has increased considerably, it's now more pronounced than on HD662 (maybe due to the foam disc?). With the pleather pads, the bass is lower than on modified HD662. Could be that i'm wrong, it was just a first impression, will check at home. Mine arrived yesterday and are as they came out of the box. I just did a comparison with my modded 662evos with their velour pads had the same impression - much reduced bass. It was immediately noticeable on the thudding first 20 seconds of Call Off Your Dogs by Lake Street Dive (streamed from Spotify) and still significant as the vocal comes in on top and the bass squirms around along with it for the next 20 seconds. I checked with some Takstar Pro80s with HM5 felt pads and the bass with those was closer to the 662s but not quite as full on. Switching back to the 688s it just sounds very lacking in bass. Despite hating the pleather pads and having to bend the head bars to buggery to get a lighter fit (the 662s are similarly adjusted so they should be similar in terms of bass impact to the light fit), I have resisted swapping the 662 pads over until some we get reference words, thoughts and measurements from Frans. Otherwise my general impression was the mid range and vocals seemed cleaner and more natural, but I was a little underwhelmed to be perfectly honest given the jump in price. Not providing velour pads was a bit cheapskate too.
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Post by superluc on Jan 9, 2018 22:42:04 GMT
Also these need better ear pads like Brainwavz XL sheepskins, fits like a glove And I was so damn suprised of sound stage / details. I did not expect to be this good. Angled or normal ? Those HM5 pads don't press too much each other on the lower part, if mounted on the 688 and leave them somewhere ? Are you using a stand for them ? If possible, i may be interested to see a pair of HM5 pads tested, because, after more use, i feel the ear space here much more problematic than in the 681 Evo. In the 688 the driver's shield is too close and protrusive, while in the stock 681 Evo it was in the rear, covered by the felt and obviously the pad's disk. Even taking away the felt and adding toilet paper, like i have do on mine pair of Evo, only the circle that previously hold the felt may tickle sometimes, at least on my ears, and the overall pressure is a lot less. But it's a mod, so it's mine fault if there is some contraindication in doing that. But here, and thinking about the awful fit on stock condition...
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Post by superluc on Jan 10, 2018 0:00:31 GMT
I have putting again the velours pads on the 681 Evo... damn. Comfort is a personal thing, but space is objective.
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