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Neumann KH 310A Review (Powered Monitor)

Not sure there's much competition at this price point here in Europe currently. Personally I am looking forward to seeing the new/updated KH310, which is most likely to appear in the near future. Reckon it'll be costly tho.
(Spot the Neumann fanboy.)
 
Alright, I really like to hear this, I hope you are right. I've only had them for a week so its too soon to say for sure. I will have to run some tests etc to really see precisely whats going on. Its too bad there wasn't a 4th eq control in this range, if I just had a simple 1.5db+ here it would be perfect to my ears.



I really like to hear this too ! Thanks for the info. I would generally agree. I'm not exactly a wizard with this stuff, just a nerdy guy who makes music, so I haven't studied the highest level nuances of these things the way a lot of you guys have, and its also why I decided to post here. I figured they were designed essentially identical, and any tolerances for variation would be extremely tight, especially with a brand like neumann.


It is possible that the sound of this monitor might not be ideal for me, but I really really want to like them. I do love sealed and neutral and not over-hyped monitors,

Not to derail the thread but: is there other sealed monitors that you would compare to the KH310's ? say I wanted ones like this but not these.... what would be your first recommendations that come to mind ?

Do you want monitors that sound pleasant to you by coloring the sound in a manner that is pleasing to you .... or do you want monitors that provide flat frequency response and reveal the true sound of the source?

Are you using these as monitors for mixing/mastering or as speakers for pleasure listening?

I am not criticizing either choice. Indeed, in addition to monitor systems in my studio, I have four stereo systems with speakers that do no have flat frequency response, for pleasure listening.
 
Not to derail the thread but: is there other sealed monitors that you would compare to the KH310's ? say I wanted ones like this but not these.... what would be your first recommendations that come to mind ?

ATC SCM25.

Unfortunately ATC25 isn’t sealed, and way more expensive.

(I audition the bigger brother SCM50 before buying the KH310, to my ears they have similar character.)
 
Not sure there's much competition at this price point here in Europe currently. Personally I am looking forward to seeing the new/updated KH310, which is most likely to appear in the near future. Reckon it'll be costly tho.
(Spot the Neumann fanboy.)
yeah I'm wondering about the price hike for these new versions.. I got these 310 A's used (extremely mint) for $5000 CAD +$100 shipping. Did the KH80's and KH120's exhibit a big price jump when they released the mk2/dsp versions ? Do you have any rough predictions for what the price jump might be ?

I'm torn on the DSP. On one hand, I love the concept of it, but it honestly seems like dsp speakers do have more issues than analog ones. When they work thats great, but HEDD, and Eve (especially!) seem to have lots of issues that are a by-product of the digital technology within them. I just get this sneaking suspicion that analog monitors are more dependable. So I like the idea of analog monitors with the benefit of the dsp via a sub, but I don't REALLY want a sub, and I feel like I have to get one now. And also it sounds like its hard to switch on and off the sub without using some app or ipad and I honestly hate that. I definitely would love to seamlessly turn on and off the sub profile at night time or just in general for hearing the system both ways, and it doesn't sound easy to do with KH310's and the KH750...... and because of the way its wired, you can't really use a monitor controller to take it into your own hands either. So maybe I do want the KH310 MK2's. Should I be selling these right now ? lol.

Do you want monitors that sound pleasant to you by coloring the sound in a manner that is pleasing to you .... or do you want monitors that provide flat frequency response and reveal the true sound of the source?

Are you using these as monitors for mixing/mastering or as speakers for pleasure listening?

I am not criticizing either choice. Indeed, in addition to monitor systems in my studio, I have four stereo systems with speakers that do no have flat frequency response, for pleasure listening.
Primarily mixing, but to be fair I do tons of casual listening and even some gaming hooked up to the same computer. But in my mind, mixing/mastering is the primary goal, and I truly think when you have that dialed in, everything else sounds great as a by product anyways. Flat and neutral is just sexy to me across the board no matter what. If this dip that I am perceiving is actually a flat response and its my room changing the freq curve or even just my perception of it. I will figure it out and adjust to the "new normal" and get used to it. So yeah goal is flat and revealing..


ATC SCM25.

Unfortunately ATC25 isn’t sealed, and way more expensive.

(I audition the bigger brother SCM50 before buying the KH310, to my ears they have similar character.)
Thats probably out of my price range yeah.. I mean I could afford it, but I also really need an entirely different room or way more treatment before entertaining a speaker of that caliber. Also, to be fair, I haven't heard ported speakers in that range, PSI and some others have some very highly rated monitors that are ported so I'm sure some of them deliver. Even Neumann's own KH420 is ported. Anyways I will consider those ATC's, especially if they pop up somewhere for a good deal, cheers.
 
ATC SCM25.

Unfortunately ATC25 isn’t sealed, and way more expensive.

(I audition the bigger brother SCM50 before buying the KH310, to my ears they have similar character.)
To my ears the 25 is similar but voiced a liiiiittle bit warmer. Surprisingly it's basically equal in terms of SPL if not slightly better.
 
First test.png

Here is my first super amateur test run with the UMIK-1. Green is the right speaker test, Blue is the left speaker test, Yellow is a combined stereo test.

Obviously my bass is a giant joke and I have some serious nodes and cancellations going on in the 100hz range. I believe between placement and heavy room treatment I can clean that up a lot.

But it does look like at 1.2khz-2.5khz there is a bit of a dip there. My room treatment is laughable right now so I admit it could be anything. Any chance this is just the output curve my speakers are outputting or is there something else going on that I'm not aware of ? is this actually the "dimness" dip that I have been hearing represented here ?

If this area looks starkly different than other tests, I am going to have to assume either my speakers are different or my room is somehow dipping those freqs at my listening position.
 
View attachment 427953
Here is my first super amateur test run with the UMIK-1. Green is the right speaker test, Blue is the left speaker test, Yellow is a combined stereo test.

Obviously my bass is a giant joke and I have some serious nodes and cancellations going on in the 100hz range. I believe between placement and heavy room treatment I can clean that up a lot.

But it does look like at 1.2khz-2.5khz there is a bit of a dip there. My room treatment is laughable right now so I admit it could be anything. Any chance this is just the output curve my speakers are outputting or is there something else going on that I'm not aware of ? is this actually the "dimness" dip that I have been hearing represented here ?

If this area looks starkly different than other tests, I am going to have to assume either my speakers are different or my room is somehow dipping those freqs at my listening position.
It is the room or mic. It is very impossible to get an accurate measurement of a monitor this way. I refer you to many in depth discussions of this topic here on ASR.
 
It is the room or mic. It is very impossible to get an accurate measurement of a monitor this way. I refer you to many in depth discussions of this topic here on ASR.
Alright I won't take these rough measurements seriously at all then. It won't prove anything obviously.... I won't post anything else on this issue for now. Thanks.
 
Alright I won't take these rough measurements seriously at all then. It won't prove anything obviously.... I won't post anything else on this issue for now. Thanks.
You still learned something from this ...... I admire your attitude of not being defensive. That is rare ability. ....... best wishes.
 
If this area looks starkly different than other tests, I am going to have to assume either my speakers are different or my room is somehow dipping those freqs at my listening position.

I can suggest the following simple experiment - just as a comparison.
  • leave the speakers where they are
  • move the mic to about 1m from the left speaker (on axis), take a measurement
  • move the mic to about 1m from the right speaker (on axis), take a measurement
  • compare the new measurements with the ones you already have
    • is the 1kHz-3kHz dip still there?
    • or did the dip shape change or shift?
My opinion:
  • if the dip shape is exactly the same and at the same 1kHz-3kHz, i will guess it might be the speaker
  • if the dip shift or change shape or disappear completely, then i'll guess it's the room or speaker positioning or listener positioning

ps: as a side note, the 1kHz-3kHz region is where the mid-dome crosses over to the tweeter (XO = 2kHz).
 
Oh ... one more point, check the vertical alignment as well ... my KH310s are located higher than ear level, therefore I have angled them down pointing to MLP so that it's almost on-axis vertically.

See the blue blob in the 2kHz zone ...


SPL%20Vertical%20Contour.webp


SPL%20Vertical.webp
 
id the KH80's and KH120's exhibit a big price jump when they released the mk2/dsp versions
There was never an analog 4" Neumann monitor. The KH 120 II is not a version of the KH 120, but is more like a 5" variant of the KH 150. You should not compare them directly. And if we talk about pricing, the price difference between the KH 120 and the KH 120 II cannot be considered a "jump", especially when the latter is so technically different. You get a much better package for the price difference with the KH 120 II with better FR, phase correction, room EQ, lower hiss, higher SPL, digital inputs, more power output and higher power efficiency.
 
Here is my first super amateur test run with the UMIK-1. Green is the right speaker test, Blue is the left speaker test, Yellow is a combined stereo test.

At what distance did you measure this, and what was your reference for placement of the microphone? The position used in the review on the first page is "Reference axis was the border between tweeter and midrange". This avoids phase issues between the midrange dome and the tweeter, which would manifest itself exactly in the frequency range where you measure a dip.

I also hope you're not to close to a side wall or desk surface with the speakers or mic because that would introduce errors in the measurements.
 
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I can suggest the following simple experiment - just as a comparison.
  • leave the speakers where they are
  • move the mic to about 1m from the left speaker (on axis), take a measurement
  • move the mic to about 1m from the right speaker (on axis), take a measurement
  • compare the new measurements with the ones you already have
    • is the 1kHz-3kHz dip still there?
    • or did the dip shape change or shift?
My opinion:
  • if the dip shape is exactly the same and at the same 1kHz-3kHz, i will guess it might be the speaker
  • if the dip shift or change shape or disappear completely, then i'll guess it's the room or speaker positioning or listener positioning

ps: as a side note, the 1kHz-3kHz region is where the mid-dome crosses over to the tweeter (XO = 2kHz).
Hey, I appreciate the suggestion and I'll try what you said. I'm a little confused though, I understand the horizontal and vertical axis of these monitors, I also understand the axis starts between the mid dome and tweeter. But when you say: move it 1 meter from the left speaker. Do you mean off axis in a horizontal way ? like say move the mic in a circular horizontal way further left, so its aligned vertically still but completely out of position horizontally from the speaker, and test ? Or do you mean further or closer to the speaker in the same alignment ? You are intentionally going away from the beam of the mids/tweeter, yeah ? I would assume the mids and highs would drastically reduce in your suggestion ? unless I'm misunderstanding you...
Oh ... one more point, check the vertical alignment as well ... my KH310s are located higher than ear level, therefore I have angled them down pointing to MLP so that it's almost on-axis vertically.

See the blue blob in the 2kHz zone ...


SPL%20Vertical%20Contour.webp


SPL%20Vertical.webp
Oh yeah this is very interesting, vertical alignment is obviously super key for this exact frequency range.. Honestly I am pretty sure my vertical alignment is on point though, I have them on 36" stands with isoacoustics aperta's putting them up another 2.75 inches and its basically got the tweeter at exactly ear height. I should probably have them up another 2 inches to get my ears exactly between the tweeter and midrange driver but I think its pretty close, I doubt its far enough off to affect the frequency response much at all, if any. I'm about 4'3" or so from the monitors btw if that matters. I'm really gonna take EXTRA careful consideration of this vertical alignment though after seeing this and in any future tests. Thanks for bringing this to my attention.

At what distance did you measure this, and what was your reference for placement of the microphone? The position used in the review on the first page is "Reference axis was the border between tweeter and midrange". This avoids phase issues between the midrange dome and the tweeter, which would manifest itself exactly in the frequency range where you measure a dip.

I also hope you're not to close to a side wall or desk surface with the speakers or mic because that would introduce errors in the measurements.
The mic was very close to my head height (maybe a few inches lower) in my seated position, and the speakers are about 4'3" away from my listening position on each side. The right one has a little bit of some desk in front of it maybe about a foot below it, its not much but it might create some reflections and affect the response (this is temporary, waiting for a new stand). But ironically, according to the tests, the left one which has nothing to reflect in front of it, is the one that showcases more of this dip. I am pretty willing to accept its something in my setup, in fact I HOPE its something in my setup that can be corrected. My gut instinct though is that it doesn't feel like a room issue though, feels like its there no matter what placement or setup I have them in. It might just be the frequency curve of these monitors. But I'm certainly not convinced just yet....
 
There is a very real dip in the midrange, it's not in the speaker response when measured on axis and anechoic, but in every realistic scenario (as in room) it will appear and it comes from reflections, that's just the nature of non-coaxial multi-way speakers. Near field is not free from them as there's usually desk and reflective surfaces really close to the source. I went with coaxial directly from KH310 and I'm extremely happy about it after 2 years and more than a hundred records done on them, but Neumanns are as good as this kind of speaker goes, there's really no alternative in the same price range. There's always something that can be done to the room acoustics though
 
There is a very real dip in the midrange, it's not in the speaker response when measured on axis and anechoic, but in every realistic scenario (as in room) it will appear and it comes from reflections, that's just the nature of non-coaxial multi-way speakers. Near field is not free from them as there's usually desk and reflective surfaces really close to the source. I went with coaxial directly from KH310 and I'm extremely happy about it after 2 years and more than a hundred records done on them, but Neumanns are as good as this kind of speaker goes, there's really no alternative in the same price range. There's always something that can be done to the room acoustics though
Thx for your take on Neumann, out of interest what speakers did replace your KH310... a lot of good people in here seem to prefer coaxial.
 
Thx for your take on Neumann, out of interest what speakers did replace your KH310... a lot of good people in here seem to prefer coaxial.
Genelec 8351A + added W371A after a year, stupid expensive and ugly but it was worth it from a business perspective. I also had KH120 for a while and they were great as well, I've done a lot of work on them without any subwoofer
 
I will note that the higher order distortion is more concerning; it's much less masked than 2nd or even 3rd. But, more of a problem than HD is IMD. Drivers doing a lot of excursion and covering a wider band tend to have much higher IM components regardless of THD. This is somewhere the 310 has more issues; it is audible at fairly moderate levels. It will be audible as a "boxiness" or "strained" sound before it sounds distorted.
Of course, if you are using subwoofers crossed at 80Hz (LR4), you are considerably relieving the KH310 woofer. I am using such a setup (see my signature), and I do not perceive their sound being "boxy" - at least at usually levels.
 
Genelec 8351A + added W371A after a year, stupid expensive and ugly but it was worth it from a business perspective. I also had KH120 for a while and they were great as well, I've done a lot of work on them without any subwoofer
Its funny, I totally agree on how ugly these are. I hear they are excellent speakers though. And its embarrassing to admit, but the look of them is a small factor in why I didn't consider them. Maybe I will in the future though..
 
Personally I prefer the look of all of these ugly pro-audio speakers. They look kinda like something brutal and sci-fi to me. In a good way.
Way better than your average effete overpriced + glossy, boutique fingerprint magnet hifi speakers.
The mrs thinks differently unfortunately.
 
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