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[Review] Superlux HD668b, They Cost How Much? (Foam Mod+More for 668b+681!) - Page 4

post #46 of 133

 

Quote:
Originally Posted by keanex View Post

If you have an amp the Superlux HD668b would suit you perfect. If you don't have much money pick up the 668b new for $50 and a FiiO E11 to amp them for $65 new (cheaper used). They definitely need amping from my experiences.


What changes upon amping?

 

post #47 of 133

Poly. 

 

Between HFI-580 and DT770 I think DT770 will make a better choice.

But that's another headphone to add to my Audition list :D Better try

everything. 

 

I'm looking for an open spacious sound that's not as laid back as the

Sennheisers. A more open and forward sound like the Grados but

with decent bass would be the best way to describe it.

 

So far it's either the SR80i (compromise on the bass) or the

DT770 (compromise on the open sound). Or if the HD668 sound like

my type of headphone, even better.

 

Currently own the HD438s, modded to achieve full-blown bass. It sounds

less bloated with the Jazz/Home Theater/Rock EQ but I feel like I need a more

forward and open sounding can.

 

Quote:
Originally Posted by crinacle View Post

 


Ah exams. JC?

Have a go at the Ultrasone HFI-580 as well. Suits your preferences well.

 



 

post #48 of 133
Thread Starter 
Quote:
Originally Posted by crinacle View Post

 


What changes upon amping?

 



I personally felt that my MBP and iPod Classic just couldn't drive the Superlux HD668b 100% without mild amping. I didn't notice an increase in sound quality with/without, I just feel they need an amp to drive them to proper volumes.



Quote:
Originally Posted by koolkat View Post

Poly. 

 

Between HFI-580 and DT770 I think DT770 will make a better choice.

But that's another headphone to add to my Audition list :D Better try

everything. 

 

I'm looking for an open spacious sound that's not as laid back as the

Sennheisers. A more open and forward sound like the Grados but

with decent bass would be the best way to describe it.

 

So far it's either the SR80i (compromise on the bass) or the

DT770 (compromise on the open sound). Or if the HD668 sound like

my type of headphone, even better.

 

Currently own the HD438s, modded to achieve full-blown bass. It sounds

less bloated with the Jazz/Home Theater/Rock EQ but I feel like I need a more

forward and open sounding can.

 



 



Well the DT770 are a lot more expensive than the SR80i/Superlux HD668b. They are more expensive used than either of them are new, generally, and every model requires a nice amp. The Superlux HD668b requires an amp, to my ears, but nothing amazing. The SR80i don't require an amp. I feel like the SR80i might be too bright for you, while the modded 668b might be just right for you.

post #49 of 133
So, just remove the circle-shaped foam held in by the pads and it's good to go?
post #50 of 133
Thread Starter 

Yup. They literally come out without taking off the pads. It was that easy. Before I removed the foam, in comparison to my Ad900, I thought they were a bit more clear, but a bit more laid back and slightly bloated in the bass. They had a nice warm sound, but were less musical than the AD900. After I removed the mod I feel like it opened up the mids/highs more, making them more brighter and musical, the bass is still a bit better in quantity than the Ad900 even. I feel like the HD668b were a bit less musical though, they still sounded just slightly laid back in comparison. I feel like the HD668b lacked some impact in every frequency causing me to analyze the sound a little bit more than the AD900. I guess it's not fair to compare them to the Ad900, but honestly the clarity is on par. The bass is a bit more than the Ad900, but lacks the impact on some tracks. The mids are just as clear as the Ad900, after foam modded, and slightly less pushy. The highs extend well, but lack the sparkle of the Ad900. The soundstage is also smaller than the Ad900.

 

For $50 though, I think these are the best headphones, especially for all-rounders, until you have a budget of more than $100. 

post #51 of 133

Keanex, this might be placebo, but I've made little adhesive-backed felt 'donuts' and put them on the magnets in my 681s, and while the lower bass frequencies seem a little shot, it has an impact somewhat similar to the ad900 (but maybe not quite as much).  Gonna try to supplement this with some polyfill in the housings to try and bring the lowest frequencies back up a tad.

post #52 of 133
Thread Starter 

Interesting, got some pictures of the process/end result?

post #53 of 133
Quote:
Originally Posted by keanex View Post

Interesting, got some pictures of the process/end result?


dsc01109ah.jpg

This is my Superlux 681 inside the cup, 668B look the same, you can see i add some blutack to the back of magnet of driver and also add some blutack to the rear . This mod is to add some mass to the cup because the 681 is quite light but have big bass that make resonance. This mod tighten the bass of 681, i think the 668B doesn't need this mod.

There are some other mods for 681 can apply for 668B:

-AKG velur pad: increase comfort 

-Filter mod: http://www.rock-grotto.co.uk/HD681.pdf, if you think your 668B has too much sibilance you can do this mod but with different value of capacitor, inductor and resistor.

-Filter box: instead of opening your cup and mount the filter to the driver, you can make a filter box and use with your headphone whenever you want and it's also easier to change resistor to vary the amout of high you want to tame

DSCF1780.jpg

-dampen mod: Use some fish tank filter wool to damp the cup, this mod can vary bass quantity (lower) with different amout and tighten bass 

HD681withwool.jpg

-Recable with shielded OFC cable: top end more refined, more sense of air, soundstage more accurate

-Mick ring mod: change the outer dull red of the 681 to alu ring that make this can look gorgeous

DSC_7833.jpg

DSC_7830.jpg

-Pence mod: glue each side a 2 pence coin to add mass ( it fit perfectly), this mod is a easy but less effective verison of Mick ring mod

DSCF1562.jpg

-Tissue mod: use soft tissue to prevent driver from touching your ear, you can use rubber tube too, this mod is so great, totally comfortable but the downside is it can ruin the sound quality, you must try yourself different material and thickness to make it both comfortable and sound great.

img20110416074942.jpg


Edited by proid - 8/17/11 at 8:43am
post #54 of 133
Thread Starter 

Wow, a lot of work. Great job. I would love to have a stock pair to compare.

post #55 of 133

Just received my ear cushions today from China, and a post card too.  Overall the fit is great, no more sweaty muffsbeyersmile.png

 

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&_trksid=p3984.m1439.l2649&item=250861305825&viewitem=&sspagename=STRK%3AMEWNX%3AIT#ht_1888wt_1113

 

 

IMAG0155.jpg

 

IMAG0160.jpg

 

IMAG0158.jpg

post #56 of 133

Quote:

Originally Posted by iElmer View Post

Just received my ear cushions today from China, and a post card too.  Overall the fit is great, no more sweaty muffsbeyersmile.png

 

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&_trksid=p3984.m1439.l2649&item=250861305825&viewitem=&sspagename=STRK%3AMEWNX%3AIT#ht_1888wt_1113

 

how do they sound?
 

 

post #57 of 133
Quote:
Originally Posted by kingoftown1 View Post

Quote:

how do they sound?
 

 



I think the sound difference is minimal compared with the pleather muffs, I kept the foam installed

post #58 of 133

I think these may benefit from a recable. I think I might try and recable them with Belden. Why? On the HD-598 it made the mids too forward, but offered the most detail, largest soundstage and clearest sound. Basically it was unusable on the HD-598. I've sound that different cheap cable can mess with a stock signature, so it's good to experiment. Maybe with Mogami and Canare. Canare may tame the treble a bit.

post #59 of 133

I had another already built Canare cable I made for another headphone that I removed, so I recabled the HD-668B with it. Took about a half hour. If you've recabled an AKG K240 Studio/Sextett, this will be just as easy, except that the soldering area is ultra tiny. Smaller than on the HD-598! I hope you have the hands of a brain surgeon. Ok, it's not that bad.

 

Not sure of the exact differences yet, but the mids do seem more forward. May be a tad less treble, but doubt it. It's hard to compare since my HD-668B didn't get much use to begin with!

 

BTW the detail on these are so good. Probably even better with a recable. Also worth mentioning is that no holes need to be drilled to recable it for dual entry!

 

Here's a picture of what it looks like:

 

Superlux HD668B recabled with Canare.JPG

 

(I think Mogami would be best if you want to keep it's stock signature but just improve it. I wanted to try and change it's sound a tad. I normally HATE Canare and think it's junk)

 

 

post #60 of 133
Thread Starter 

I don't think I'll ever believe recabling effects sound unless I hear it myself.

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Head-Fi.org › Forums › Equipment Forums › Headphones (full-size) › [Review] Superlux HD668b, They Cost How Much? (Foam Mod+More for 668b+681!)