An impedance adapter will give you more usable volume knob range (and more bass on the KSC75 if itās a series-resistor adapter of high enough resistance, like 100-ish ohms), but it will not solve the problem that the KSC75 simply starts to distort a lot when you turn it up to 90 dB or more. Itās just not good for loud listening.
LE:
Bass boost from 120-ohm amp output resistance (or series adapter):
The DUNU mentioned above, 75-ohm version, Iāve measured to show up as 18-ohm amp-out resistance toward the headphones, so it wonāt boost the bass by much, probably less than 1 dB.
And of course if you boost the bass on the input/electrical side, it becomes even more important how loud you turn them, since most of their distortion is in the bass.
What? No. The DUNU are ābetterā for increasing the apparent headphone impedance seen by the amp so that you get more volume control range and lower the noise floor on sensitive headphones, without also raising the apparent amp-out resistance seen by the headphones. This is the type of adaptation circuit used in the iFi IEMatch, only there it actually keeps the apparent amp-out below 1 ohm and thatās why the IEMatch is much more expensive. DUNU only manages an 18-ohm apparent amp-out, and that might change some frequency responses in some IEMs, but not by much, in most cases itās also fine the way it is.
The Fengru is a simple resistor added in series with the headphone driver, so it will increase both the apparent headphone impedance and the apparent amp-out by the same amount. Usually this is not what people want, but when you know what youāre doing and when the headphones allow it you can use one of these to āanalog-EQā the headphonesā frequency response in a desirable way, like giving the KSC75 a little bass boost. (Or you could use it with planars because those donāt care about amp-out and because you couldnāt find a low enough resistance version of the DUNU, like Iām using the 30-ohm Fengru with my Verums.)
Never expected to cry while listening to headphones, But these did that to me in the first 3 hours of use.
They allowed me to take music with me when I go outside and enjoy it, Something I havenāt done in years because itās nearly impossible to use anything but a design like these when youāre hearing disabled and need to wear hearing aids. (And the Sennheiser OMX 52ās that I have did what the had to do, But thatās about it so I stopped using them a couple of years ago.)
I can wear these over the earpiece of my hearing aid, Enabling me to listen to music and hear everything around me that I need to hear.
Second pair arrived today for home use together with an extension cable for pc and tv use + a Beyerdynamic DT 990 Pro.
The DT990 Pro is back in itās box with a return label on it after listening for 2,5 hours, Didnāt like how it sounds (The known flaws basically.) and I donāt know if its normal but I could hear some sort of creaking coming from where the cable enters the headphone every time I moved my head. Which annoyed me to the point of frustration because I aināt a statue and move my head all the time.
Good thing I didnāt order a AMP/DAC yet, Unsure what to do now. Might give the AKG K712 a try? Or perhaps just stick with these lovely Koss KSC-75ās and give up on trying to find something more comfortable for longer duration use. (A lot of Zās recommendations arenāt available or a lot more expensive here in Europe.)
Edit 2: Did some reading on Neutral vs Warm, Going to try the AKG K712 Pro even though I havenāt noticed any fatiguing with the KSC-75 so far but comfort during longer use could be better.
What are you making issues with the 990? The sharp highs and general lack of mids ? More specifically I mean. Because if thatās it try out the 880 itās like a more pleasant 990 and thatās coming from a guy that loves his 990ās.
The sharp highs and I was thinking a little bit to much bass but perhaps that was the lack of mids?
The DT 880 being semi open could potentially be a problem with my left ear, Which needs to be able to āBreatheā therefore I focussed my search on full open back headphones.
But perhaps itās best I open a new topic for assistance with my headphone search.
Back to the Koss KSC-75: Used them for about 10+ hours yesterday and came to the conclusion that I would prefer something more comfortable in both sound and feel for long duration use, I did loosely hung them on the top of my ears but thatās still less comfortable compared to the Sennheiser HDR-127 that Iām borrowing from my dad. (Which are good in wearing comfort but donāt impress me with the sound quality.)
Iāll be posting a new topic for my headphone search with more details about my ears and hearing loss, other problems I have, What Iām looking for in both headphone and amp/dac and what my budget is soon. But not today.
I gotta say, I have the Sennheiser 58x, the Cooler Master 751 and the Koss KPH30iā¦
ā¦but I love listening to these the most. Honestly. Itās just such a LOVELY sound, no matter what the song is, and theyāre wide as well. Theyāre uncomfortable and you look like an idiot wearing them (especially if youāve put on the Yaxi pads like I did), but the sound is absolutely amazing. I wish they were regular headphones. I ended up using the KPH30i ONLY when I listen to extremely bassy music, I dislike almost everything else about them tbh.
(I should note that in the Amazon review of the Yaxi pads Zeos ends up saying that you shouldnāt put them on on this specific set because it loses the bass. Personally, Iām satisfied with the bass even so, but Iām not a bass-head)
I bought these based on Zās review. Best $15 Iāve ever spent on audio gear. Already had the kph30i and love them, couldnāt go wrong with koss again. Iāll be uploading my reviews on both soon. Also got the mmcx adapters to upgrade them.
Hey does anyone know what over-ear headphones have a similar sound signature to the KSC-75? I love them so much I just want to upgrade into normal headphones
The shps sound alright for about 60 dollars z over hyped them greatly and I kinda regret buying them better off saving for a used sennhieser or for only 15 bucks ksc75.
leave my shps alone.