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Removing the baffle/grill from HiFiMan HE300's speaker - what will safely work ?
Removing the baffle/grill from HiFiMan HE300's speaker - what will safely work ?
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Old 30th August 2019, 10:03 PM   #1
freddi is offline freddi  United States
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Removing the baffle/grill from HiFiMan HE300's speaker - what will safely work ?
Default Removing the baffle/grill from HiFiMan HE300's speaker - what will safely work ?

I have an old HE300 with one speaker fried and wish to remove the old drivers and retrofit with new drivers. What is the proper way to separate the driver from its baffle / grill without damage to the baffle ?

Also, what 50mm drivers might you suggest for the retrofit ? - There's several direct from China and also a Peerless Tymphany which should physically fit.
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Old 30th August 2019, 11:35 PM   #2
Galu is offline Galu  Scotland
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Originally Posted by freddi View Post
What is the proper way to separate the driver from its baffle / grill without damage to the baffle ?
I presume you want to separate the driver from the rear of the exposed plastic baffle shown in the attached photograph.

Check out this repair/service manual. N.B. I haven't tried to download myself.

Hifiman He 300 Repair Service Manual User Guides Ebooks 2019 PDF Book
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File Type: jpg HE300.jpg (20.4 KB, 58 views)
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Old 30th August 2019, 11:46 PM   #3
freddi is offline freddi  United States
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Removing the baffle/grill from HiFiMan HE300's speaker - what will safely work ?
Many thanks - (that site wants my bankcard info so am leery)
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Old 31st August 2019, 12:11 AM   #4
Galu is offline Galu  Scotland
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And rightly so! Steer clear!

Is the problem that the driver is glued to the baffle?
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Old 31st August 2019, 02:35 AM   #5
freddi is offline freddi  United States
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Removing the baffle/grill from HiFiMan HE300's speaker - what will safely work ?
yes - its my kid's headphone and I don't have it at hand to see if the bond can be broken with a hobby knife. Although fairly smooth, HE300 to my ears had poor low frrequency power handling with lots of doubling. (unless it was the amplifier at the time being severely under-powered - ?)
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Old 2nd September 2019, 09:11 PM   #6
sgrossklass is offline sgrossklass  Germany
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Originally Posted by freddi View Post
Although fairly smooth, HE300 to my ears had poor low frrequency power handling with lots of doubling. (unless it was the amplifier at the time being severely under-powered - ?)
Are these the original HE-300s? Those were a bit meh in general. If you look at their measurements, frequency response is a bit crummy, and level handling is not their greatest forté in general (though there is worse). Rev. 2 was noticeably improved.

Unfortunately, a lot in headphone design is about enclosures and pads. Hoping to improve matters without any experience or measurement facilities is being very optimistic at the very least.

Thanks for the pointer to the Tymphany drivers though (you rarely see any data on headphone drivers). It's the HPD series. The 40 mm one appears to have some proper headphone EQ (free or diffuse field), the 50 mm one just has a generally upwards-sloping frequency response (which would be compensated by proximitely effect in use, I guess) with high peak sensitivity, indicating high efficiency and low moving mass. Both have vented magnets for low Fs, as usual in headphone drivers.

Last edited by sgrossklass; 2nd September 2019 at 09:27 PM.
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Old 3rd September 2019, 12:05 PM   #7
xrk971 is online now xrk971  United States
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Removing the baffle/grill from HiFiMan HE300's speaker - what will safely work ?
Are HE300’s dynamic drivers and not planar magnetic? I have He400i’s which are planars, and sound quite nice when driven from an appropriately powerful amp.
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