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Monolith M300 In Ear Planar Earphones
The Monolith M300 in ear planar headphones are the perfect way to experience your music collection. Featuring a 28mm planar driver, these earphones produce a detailed aural landscape and will resolve all the sonic detail from the best recordings. Spectacular imaging, low distortion, and perfectly balanced sound make the Monolith M300 a true audiophile listening experience.
Planar Driver and Functions
Planar Drivers: Not your typical in ear driver! A planar magnetic driver is a flat membrane that is surrounded by magnets. When current is delivered, the membrane produces sound that has lower distortion, better bass, and pinpoint imaging that is usually not found in your typical headphone driver. The size of the driver in the Monolith M300 is 28mm, with bass that extends down below 20Hz.
Open Back Design: A rarity in an IEM, the Monolith M300 features an open back design. Instead of an "inside your head" isolated experience that traditional earbuds provide, the M300 provides a holographic listening experience. It's as if you're in the middle of a live performance, instead of being closed off from the world.
Comfortability: The Monolith M300 has been engineered to be comfortable for extended listening sessions. Incredibly lightweight, the M300 comes with multiple sized ear tips, ear hooks and earlocks for long listening comfortability.
What's in the box?
- 3 Pair Eartips
- 1 Pair Earhook Black
- 1 Pair Earhook Clear
- 2 Pair Earlock Black
- 1 Cable Connector
- 1 Carrying Case
Buy with Confidence
Monoprice not only stands behind every product we sell with a 5 year replacement warranty, we offer a 30-day money back guarantee as well! If the product you purchase does not satisfy your needs, send it back for a full refund.
Quality at a Fair Price
Monoprice's rugged design and rigid quality control standards deliver high quality products at fair prices.
Hassle Free Packaging
Monoprice exists to bring simplicity, fairness, and confidence to technology choices. This product features recyclable packaging that is simple to open, cost effective, with minimal waste, and fully protective as it travels to you.
Service & Support
You're never on your own with Monoprice products! We have a full team of friendly and knowledgeable technicians available to answer your questions, both before and after the sale. Contact our technical support team for questions about our products, troubleshooting, or even suggestions for products to fit your particular needs. Not to be outdone, our friendly and helpful customer service team is here to make your ordering, delivery, and any possible returns a quick and painless operation, from start to finish!
|Style||In-Ear, Universal Fit|
|Transducer Type||Planar Magnetic, Semi-Open|
|Magnet Type||High-grade N50 Neodymium|
|Diaphragm Type||Uniforce double side voice coil design|
|Maximum Power Handling||3 watts|
|Frequency Response||18Hz ~ 50kHz|
|Total Harmonic Distortion||Less than 0.1% at 100dB|
|Dimensions||1.3" x 1.6" (32 x 40 mm)|
|Weight (per side)||0.48 oz. (13.5g)|
Questions and Answers
I've got these plugged into a Dragonfly Red to a PC playing Spotify Premium. Genres are EDM, metal, and 90s rap.
I ended up sending the Audeze iSine 10's back because I felt they blew it on the treble. The m300's do not have this problem so far. I've only got about about 4 hours of listening so far, so I won't go into detail on the sound, but so far I like these slightly more than the iSine 10s, not even considering the price.
The iSines feel a little more durable and crisper mids & lows (that could change after these burn in). None of the iSine 10's advantages justify the extra $200 price tag in any way.
The earhooks are the same size, just clear vs black. They are ~ok in regards to comfort. I will most likely seek out some of the aftermarket earhook solutions meant for the iSines.
Included tips were two pairs of small (one was silicone, other was foam), and silicone mediums, silicone larges. The silicone are average but the foam feel sub-par and likely to need replacing quickly. Like most other earphones, getting Comply or similar premium tips are well worth the $10-15.
The removable connectors seem fine; none of the issues they've experienced with their m1060 first run.
The only other advantage I can give to the Audeze iSine is the ability to get the cipher cable (dac/amp) that works with iOS devices. That model is $400.
Overall, I think these are an absolute steal at $150. Add another $20-30 of upgrades for earhooks and tips, and I think the m300 stomps all over the iSine10.
3 weeks ago
Some might balk at the concept: but these will requires hours and hours of running in from the amp, before the treble and upper midrange make their slow entrance.
They are hungry too: I gave mine 1W. The MMCX connectors will also allow amping in balanced mode, likely a further improvement.
3 weeks ago
Soundwise the M300 is stunning, it is hard to believe that these cost only $149.99. These headphone exibit all the goodness of Planar technology over balance, details and smoothness. Bass is tight and nicely extended which is a true advantage with IEMs. All sound at the right place with no excess. Sound stage is wide enough and show decent openess like would a big size Planar.
The M300 looks nice, but like all other Monolith headphone one would think it could be even nicer but not at this price tag. I cannot say how the M300 sound compared to other Planar IEMs. Among the life size Planars I know, the M300 performers really well despite its mini size. Among IEM I know, the M300 is at the top, even compared to costy units.
The M300 is a great IEM, might not be suitable for sport.
I ran the M300 with A LH labs Geek Out 2A SE only with 100mW gain and volume control at 30% not more. this means the M300 can run with most DAPs and maybe most smart phones. It is easy to drive.
Cost effective but not cheap.
Adapted to fit almost all hears.
Easy to drive.
The M300 is another Monolith that could most much more if it was not from Monoprice.
It is designed to truly listen to music!
3 weeks ago
3 weeks ago
Upon receiving them, they were somewhat unlistenable due to the fact that they became extremely fatiguing only after a few songs, I noticed massive peaks around 500hz and 1.6khz-2.2khz right off the bat, spatial imaging was non-existent and quite frankly, not the sound signature planars are known for. I don't have any experience with planars earphones/headphones, but I do have a ton of experience with planars speakers in home audio setups. I have owned magnepans in the past and built line arrays utilizing BG planars so I wouldn't consider myself a noob when it comes to planars. With that being said, the only positive thing I noticed then was the detail so I decided to break them in and see what happens as well as ordering some talent audio occ silver plated wires.
I threw on some pink noise in 24 hour intervals for a total of 4 sessions. It's amazing how much they've loosened up after the break in, the massive peaks disappeared I found myself liking them more and more as I listened them longer.
They still had a couple of things to be ironed out totally so I began to play with my eq settings on my iPhone 7 plus and my god did they respond well to the preset settings. I found myself absolutely loving these when the iPhone eq preset is set to "Latin" and paired with the talent audio silver plated cable. Now it's finally sounding like what a planar should be. The EQ setting opened up the spatial imaging and transparency as well as improving the tonality throughout 50hz-20khz.
If you have an iPhone 7, make sure to use the OEM Apple lightning to 3.5mm DAC dongle. Using an aftermarket dongle will change the sound characteristic as the dongle is a DAC/amp
2 weeks ago
so, I bought this for comparing iSine 20 and item is deliverd today, just 1 hour ago.
I could hear the air ambient sound through m300 which feels like plastic narrow straw hole effect in your ear. not a electric white noise. it just amplified air ambient sound. and it could effect on sound quality way worse in my opinion...
iSine also can hear the sound from outside. but iSine NEVER AMPLIFYING THE AIR AMBIENT SOUND like that. they just calm and just hear all from outside. it's big difference.
maybe m300 need better inner coating for reducing reflex?
other thing, the cable. yeah, it looks pretty good. but it is slightly heavy for actual use iem.. please, make it thinner....lighter...just a bit.
sound. frequency response.. it is similar to isine but, m300 slightly less bass level of depth and louder woman vocal & trebble slightly a bit. both changes are really tiny but you could feel.
I would expect this gonna be "cheaper but similar".
but, this item actaully "cheaper and lacking". especially amplifying air ambient sssss sound critical on me.
I know even compare with iSine 10, this just half of price. and compare with iSine 20, this just thrid of price or less.
but this item is obviously copy/benchmark from iSine. it means this should be silmilar. but this has issue which is not represent from original and this is iem so we cant modification this. not as the m1060...
so, as the price range and also consider experience of planar magnetic IEM, there is no competetion. this item is only one for that purpose.
but, if you want planar iem and also need guaranteed quality which is directly connected with sound, audeze iSine would be better choice at least you could ignore the price tag. or find used iSine.
2 weeks ago