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Before we get into the AKG K240 600 Ohm vs. 55 Ohm comparison, grab a snack, sit back and relax because…
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AKG K240 Studio
Today we’ll take a look at the K240M 600 Ohm version and compare it to the K240S (Studio, 55 Ohm).
I’ve owned both and still happen to have the M version here at the crib.
Please also note that I didn’t take pictures of the Studio model back in 2016.
Let’s start with the build and comfort.
Both of these headphones are extremely lightweight, but for how cheap they feel in your hands, they seem to be built for the long haul.
Consider for a moment that the K240M I have is from the ’80s and still functions perfectly.
The cups are in great shape, the hammock-style adjustment still works just fine, and the wire, though not detachable, has held its solder all these years later.
Perhaps AKG knew something we didn’t?
I owned a K240 Studio version around 2016 and also had no problems, but do keep in mind it was made in China.
the studio version looks and feels like an exact replica of the 600 Ohm version with some minor caveats:
- The outside of the grille is slightly different on each.
- The K240M was made in Austria.
- The way the wire connects to the cup is a bit different and is detachable on the Studio version.
The hammock style adjustment and light weight mean these will rest on your head quite nicely, although the ear cups are kind of shallow and the padding is a very cheap feeling faux leather.
one of the main reasons I don’t use my 240M version is because they get pretty doggone uncomfortable after about 30-45 minutes.
Definitely, something to keep in mind. You can always replace the pads, and I will update this if I do so.
As far as sound?
Do be aware that it rolls off considerably below 100Hz (roughly 10dB), with a flat mid-bass and some nice texture going on without the bloat that accompanies a lot of cheap entry-level products.
the sub-bass is definitely lacking in impact and slam, so keep that in mind.
It’s absolutely wonderful and makes up for the other minor shortcomings of this headphone. Instruments and vocals are given ample room to breathe and shine.
I will caution you that the mids after about 1kHz decline into 2kHz but come up at roughly 2.5kHz.
There’s another drop-off at 3.5k, and I’d be lying to you if I said this doesn’t make the sound signature come off as a bit odd at times.
You may experience a bit of dullness, but I wouldn’t call it a dealbreaker.
There’s a peak around 7kHz which ends up being a bit different than your typical rise at 9-10k.
This is in large part what makes the K240 sound so unique.
You’re not going to get the harshness that comes along with peakier high treble headphones, and the emphasis seems to be a tad different.
The K240 is certainly a more relaxed overall listen, but the detail and resolution are exemplary for a headphone in this price range.
it’s probably one of the main reasons it’s remained relevant for so long.
People continue to buy and discuss this headphone, and you’ll know exactly why when you hear it.
That is to say that the K240 seems to be a bit of a specialized headphone.
What I mean by this is that it works incredibly well for Older recorded music like Motown, Oldies, raspy sounding Classic Rock, and stuff that generally doesn’t have a lot of overwhelming bass emphasis.
With these types of genres, the resolution is so good that I have a hard time putting it into words.
The K240 is simply one of the most revealing headphones in this regard and thus why I still recommend it to this day.
You will absolutely feel like you’re listening to old favorites for the first time, and I can’t recommend it enough for Motown specifically.
- Recommended: AKG K240 Studio Review; A Truly Unique Specimen
This is perhaps the main difference between the 2 headphones.
The AKG’s K240 model at 600 Ohm is going to resist power quite a bit.
This is why it’s super important to purchase an amp that will provide enough power into that Impedance rating.
By contrast, the 55 Ohm AKG K240 will not resist too much, but we still have another dilemma on our hands:
The misunderstood and dreaded Sensitivity rating.
- Related: What is Sensitivity in Headphones?
If you weren’t aware, Sensitivity is basically a measure of how efficient a headphone is.
The higher the number, the more efficient it is.
The lower the number, the less efficient it is.
- Anything over 100dB/mW is very efficient and does not need much power from the amp to reach acceptable listening levels.
- Anything around 97db/mW and lower is not efficient at all and does need more power from the amp to reach acceptable listening levels.
- 98-99 dB/mW is kind of a grey area in my opinion. If you have a headphone with a number like this, take a gander at the Impedance. If it’s a low-ish number as in the case of something like an M40x, you won’t really need an amp.
In the case of the K240, both the M version and S version have an extremely low Sensitivity of 91dB/mW, but with the 600 Ohm (M), not only does it resist power a lot, but it also requires more from the amp.
The HD600s at 97dB require 20mW to perform optimally.
Obviously, the K240 is going to require a bit more.
This takes into account both its high impedance and low sensitivity.
So we need something beefy enough to power these.
What do I suggest, you ask?
I like the ATOM from JDS Labs. Plenty of power (136mW Continous @ 600 Ohm), dead neutral, perfectly priced. The ultimate solution.
Well that’s about it for today my friend! I hope you’ve enjoyed this AKG K240 600 Ohm vs. 55 Ohm comparison.
Questions? Comments? Requests? Did I miss the mark on something? Please let me know down below or Contact me!!
Marvin, what do you make of all this? I would love to hear from you. Until next time..
All the best and God bless,
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