Monoprice Monolith M650 review: Your own 10-foot wide dome of dynamic sound.
TL,DR: HD58Xs did not make me feel like I was at a bar I know in front of… deceased musicians playing for us. HD58Xs did not make me cry. These did. They’re the best headphones I have. Excellent detail. Excellent, life-like soundstage and depth. Excellent naturalness. Just mercilessly squash these damn, terrible, deceiving pads on a 1ft wide thing for 6 to 12 hours, and you’ll change these “slightly V-shaped and soulless” headphones into “timbre monsters” with incredible mids, and all-around neutrality (harman neutral) and detail – but with a (pleasant) dip somewhere around the 10khz region, killing all the sibilance (esses). Sometimes sold for 60$, these are a steal.
Treble:
It’s hard to find frequency graphs for these, but I saw one or two, and I was expecting no “air” at all. Pleasantly surprised: there is “air” (10khz, even 15khz+) in these. They definitely do not sound like “half a pair” of headphones. You hear the entire studio. No information missing – except maybe a lack of mids, stock, with the (damn) leather pads. They’re slightly V-shaped. I’m treble-sensitive, but even when the treble was a bit too much, it never sounded harsh or sibilant. (What?! I thought treble and harshness and sibilance were all synonyms! Sorcery!)
Bass:
The treble and high-treble (10khz+) sound like open backs, but with a good seal, the bass can sound like it’s coming from closed backs. Like, Sennheiser HD280-ish, 32dB attenuation C-clamp, closed-back-like bass. For open backs! Theeese got a surprising amount of “power”. For electronic music or rock/metal, they knock. And it’s never too much. I recommend HD58Xs over these if you prefer tube-like warmth. But if you’re used to cheap headphones and believe you need closed backs for the “knock” and open-backs for “air”, these might be your best, all-around, headphones. (I got mine for 100$ shipped, and Monoprice sometimes sell em for 60$USD – that’s 60% off – M650s are 150$ MSRP.)
Mids: “Timbre monsters”.
Stock, the mids from M650s sound… like every other pair of cheap headphones you can try at Best Buy. You have to concentrate on the lackluster mids to find the details and try to enjoy the sound – in vain. For beryllium driver headphones, talk about Monoprice shooting themselves in the foot! A/B these with HD58Xs (still 170$ on Mass/drop) and five seconds will convince you to not buy M650s. But you’d be oh, so wrong… That’s exactly what I did. I then squashed these damn, terrible, deceiving pads: This will get rid of the V-shape and boost the mids. And you’ll get timbre, timbre, timbre. Magnificent, soulful mids. Change the pads or just squash em. And theeese headphones will sound like 200$+ headphones.
Pure beryllium naturalness:
So… Why did I buy these? (Incoming assumptions overload from the lo-cost hi-fi noob)
Planars throw absolutely everything at your ears at the same time without ever being physically able to sound muddy. This can be “stressful”, sound “too fast” and/or “too sterile”. Dynamic drivers (especially cheap ones) tend to be the complete opposite: “too smooth”, “too slow”. So beryllium drivers appears to be a great choice, in-between planar speed and dynamic drivers smoothness. And for me, it is. Holy shit. Drum kicks, guitars, snares, voices, everything can really sound natural, lifelike. Combine this with an excellent soundstage, and you get natural, life-like timbres, in a natural, life-like studio room. I try to tell myself my HD58Xs can sound as good as these… but no. HD58Xs did not make me feel like I was at a bar I know in front of… deceased musicians playing for us. HD58Xs did not make me cry.
Dynamics galore:
I believe these headphones accentuate, “boost” everything. They’re extremely dynamic. It sounds like even all my mp3s and youtube videos I listen to are now in 32bit audio or something similar – i.e.: at least twice the dynamics. I believe you could clearly hear the difference between amps and DACs with these. If it’s not dynamics… is this real? Or are the headphones doing “euphonic” stuff, messing up with the sound? To give that much soul to HD58Xs, you’d need to plug em in a (colorful) R2R and a Class A amp or something similar… but you still wouldn’t get the soundstage.
10-foot wide soundstage:
Above all, I hear all the sounds I heard before, but from different places: There’s space between the instruments. Great soundstage. Impressive depth. Seriously, sometimes it’s as if I can hear the reverberations coming from the wall from the back of the studio (also, I place my ears, in the pads, “behind” the drivers – and by doing this, with M650s, singers are like “in front of me” instead of “in my head”). Maybe all this is because they’re 64 ohms – or maybe because they’re well made and (really) open, so the sound is free (so “free” these could almost replace a bluetooth speaker, lol).
Downsides:
-Dynamics galore means they’re brutal with mixes. Bassy recordings will sound really bassy. Clear recordings will sound really clear. Shitty recordings will sound really shitty. And excellent recordings will sound really excellent. You’ll instantly know if there’s too much of something, somewhere. All this also means an extremely dynamic soundstage. If the song was recorded in a 4’x4’ cube, you’ll hear it and feel the “claustrophobia”. It will sound like “mono” sound or bad cassette tape. All this combined means I already had to concentrate on someone singing somewhere 20 degrees at my right to hear what he was singing. Definitely weird – but definitely not common. So… avoid these if you’re hard of hearing – these are like the opposite of “compressed” (like Koss ESP-950/Xs?) headphones (…or earspeakers). And avoid these if you listen to music at low volume… you won’t hear half of the details.
-For heavy, fast, double-bass and/or cacophonic stuff, you sometimes wonder what’s happening. Because it’s just too fast, too “everywhere”, lol.
-I’d still recommend HD58Xs over these for mixing, because it’s easier to hear every detail with a smaller soundstage.
-Again, they’re really open, so someone in the same room as you definitely knows everything you listen to.
-Pretty, braided cable, metal endings, but the cable is also the definition of “jank”. Copper usb cable jank.
-Microphonic cable. i.e.: If it touches your shirt, you’ll hear it.
-This one is for big heads. I had to glue another headband under the headband.
-They’re not plug-and-play. They’re “open package, put these on a 1ft wide thing for 6 to 12 hours to squash the leather pads, and plug and play.” Otherwise, you’ll be deceived.
-Velour pads (I don’t have em) are apparently neutral… but sibilant. And without the leather pads “seal”, you wouldn’t get the “HD280 Pro-ish”, closed-back-like bass.