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Post by headroc on Feb 19, 2019 22:48:26 GMT
I can only get an 47 mH inductor with 97 Ohms - will this be a problem?
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solderdude
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Post by solderdude on Feb 20, 2019 5:37:28 GMT
nope, just change the resistor to 220 Ohm (instead of 330 Ohm)
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Post by vampula on Jul 31, 2019 15:46:22 GMT
well really what i see is a hd555/595 driver in hd600 enclosure)))) maybe with slightly different damping and pads.
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solderdude
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Post by solderdude on Aug 2, 2019 10:55:04 GMT
And a very different impedance/voice coil, as well as things that cannot be 'seen' by the naked eye such as membrane materials, shape, thickness.
What you are seeing is the same frame being used over several different models.
The drivers are definitely not the same drivers. They look similar from the rear because you are just looking at the frame and magnet which these drivers share. The frame/magnet are not the most important factors that determine the sound/performance. The voicecoil and 'membrane' do as well as the external damping and pads driver angle and distance/position.
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h1a8
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Post by h1a8 on Aug 12, 2019 19:35:18 GMT
I just tried the magnet mod. It definitely adds a touch more weight in the deep bass. Maybe more resolution? Can anyone else try this and post some measurements (with and without the extra magnets). See here youtu.be/2VRO3D3hht4
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solderdude
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Post by solderdude on Aug 12, 2019 20:44:48 GMT
I would expect the only difference to be that it plays slightly louder. The magnetic field flows from the inner side of the voicecoil to the outer side. A magnet on top of another magnet possibly may not do anything to the specific field in the voicecoil gap anway If it were all manufacturers would already be doing this in their higher spec'ed models.
Will have a look into it though,
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mrs
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Post by mrs on Nov 8, 2020 18:14:05 GMT
I inherited a pair of 58X from a friend, thinking I'd just use them as reference for comparing with the new 560S. I'd heard the 58X before and found them too warm, too much midbass to the point it chokes the technicalities out of the sound. So didn't expect I'd listen to it much apart from the 560S comparison. Then I found out about your mods & measurements. Making some assumptions -- (1) getting hold of your exact materials will be difficult, (2) I don't have measurement equipment to validate my results match yours, (3) instead I can use the tuning principles demonstrated in your modding article and be satisfied with results if I like the sound -- I decided to try the mod with materials I have handy. I started with 3M micropore tape, cut into 2 cm circles and pasted onto to the top of the magnet. The effect is immediately apparently, but too strong. The micropore tape just prevents any bass from getting out. Though the rest of the headphone's technicalities began to shine through, it sounds a bit lifeless in this configuration. Next I tried 2 cm circles of Aeropress paper coffee filters, affixed with dabs of Blu Tack. This... this is quite nice. The midrange and treble technicalities come through, mid bass bloom is resolved, and the sub-bass retains the strong qualities of the stock 58X. For my tastes, the bass is actually better than stock -- without that mid bass bloom, the bass presentation is tighter and better defined, not too unlike the quality that I like best about the 560S. The midrange is still tastefully warm. Treble not as smooth and well executed as my HD 600s, but that's a pretty high bar. Overall, with the Aeropress mod, I'm quite happy with the 58X. This is a good can. Photo of my 58X:
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solderdude
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Post by solderdude on Nov 8, 2020 20:34:48 GMT
Nice.. It's a question of finding the right amount of 'air restriction'. Not too much not too little. The material doesn't matter as much.
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mrs
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Post by mrs on Nov 23, 2020 1:47:57 GMT
Follow-up: I got some double-sided tape to clean up the "install" of the Aeropress filters -- and unfortunately the bass reduced quite a bit more. My hypothesis is that the Blu Tack provided extra airflow vs. the double-sided tape, and switching to the tape made the filters block too much of the air / bass. It's not bad, but does remove some of the dynamics FullCompass.com lists AKG K240 foam discs which look like the foam you used, so I've got some of these on order (including some spares): www.fullcompass.com/prod/544759-akg-2260z09010-foam-earpad-disk-for-k240In the meantime, I tried some other materials I have handle that I can easily cut into 2 cm circles with my circle cutter. Dryer sheets work somewhat well, but I find don't block enough air / bass -- even double-stacked. I've also tried the lining of some unused tea bags and it works shockingly well (with double-sided tape 😛). Bit warmer than the Aeropress filters, but the dynamics are better preserved.
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solderdude
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Post by solderdude on Nov 25, 2020 20:32:16 GMT
Follow-up: I got some double-sided tape to clean up the "install" of the Aeropress filters -- and unfortunately the bass reduced quite a bit more. My hypothesis is that the Blu Tack provided extra airflow vs. the double-sided tape, and switching to the tape made the filters block too much of the air / bass. It's not bad, but does remove some of the dynamics FullCompass.com lists AKG K240 foam discs which look like the foam you used, so I've got some of these on order (including some spares): www.fullcompass.com/prod/544759-akg-2260z09010-foam-earpad-disk-for-k240In the meantime, I tried some other materials I have handle that I can easily cut into 2 cm circles with my circle cutter. Dryer sheets work somewhat well, but I find don't block enough air / bass -- even double-stacked. I've also tried the lining of some unused tea bags and it works shockingly well (with double-sided tape 😛). Bit warmer than the Aeropress filters, but the dynamics are better preserved. It's a matter of finding the right material that has the right amount of damping/airflow. With the grilles off it is easy to experiment.
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Post by nooby1411 on Dec 2, 2020 20:47:14 GMT
I have a question about the filter because when I try to simulate your circuit in series with a 150 ohm resistor it will give a result of -40db, so why isn't it needed to have an impedance in parallel with it? ( i don't have much knowledge yet about this kinds of circuits, sorry)
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solderdude
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Post by solderdude on Dec 2, 2020 22:02:36 GMT
You need to simulate the series resistance of the inductor as well. So when simulating a real world inductor either add a resistor or put it in the properties. The 150 Ohm impedance basically is in parallel with the LC as the source is near 0 Ohm.
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Post by nooby1411 on Dec 2, 2020 22:24:11 GMT
Thank you! I didn't know that resistances of the real world LC where that high.
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solderdude
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Post by solderdude on Dec 3, 2020 6:14:19 GMT
for smaller sized inductors it can be a few to tens of Ohms (the ones that can't handle much current) The ones that can handle currents usually are below 1 Ohm.
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Post by jaris88 on Dec 10, 2020 22:25:10 GMT
Hey everyone, I just registered to say thank you, sincerely, for the library of information available here and the conversation regarding the jubilees. I have a few questions specific to the 58x if you don't mind. But first, a quick background from me: - Completely new to the "real" audio world.
- Previously, I've used "gaming" headsets (Steel series Siberia and Arctis Pro). The best sounding headphones I've ever owned and listened to are the Plantronics Back Beat Pro 2 (still own them, they're my travel companion).
- My main use case is to game with these (second use case is music where I enjoy LoFi, Synthwave, Alternate Rock, and acoustic/instrumental pieces (Cuatro is my favorite instrument followed by the Piano).
- I recently purchased a 58x Jubilee from
massdrop after going into complete analysis paralysis between those and the 6xx. I decided on 58x because of the easier time powering them (since I have no amp at the moment, more on that below) and the slightly better bass. I'm hoping I don't get buyer's regret on these. - In the (near) future, I'll likely get a Schitt Magni Heresy and a Modi 3 DAC combo to power the 58x. Based on what I've seen, they make a good entry level duo.
Now, I've read about some mods that can be done to round out the 58x overall. As a new person to audio, will I even notice these mods as an untuned ear? That's to say, are we talking about a 3-5% improvement overall in sound or is it much more drastic? Should I wait until I get experience with the headsets before I go looking to build a passive filter and mod the felt covers on the magnets?
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