I received the Pro Turbine Copper In-Ear-Monitors as a generous "sample pair" in the recent MONSTER CHALLENGE by my own request...in exchange for an honest review. I had always wanted to hear them and so I jumped at the chance to put them through the paces. I feel incredibly lucky that I have been able to listen to and even own some incredible high-end gear, all within about a year and a couple of months of using Apple iBuds! There's a lot to learn about and enjoy in this hobby (audio, music, gear). One of the things that I'm most thankful for is knowing that I'll never be going back to "bad" sound again...
As for earphones, I have had all of the Yuin PK Series earbuds, the HiFiMan RE-0's, Sennheiser IE8's, and have settled on the Ultimate Ears Triple-Fi 10's and the Ultimate Ears In-Ear Reference Monitors.
For Large Headphones, I have settled on the Grado RS2i, the Grado HF-2, the Alessandro MS1 (being modified), and the Sennheiser HD600.
I did less comparing and more listening to understand what the Coppers sounded like. If I compare to the Triple-Fi 10 often it is because I actually have them right now as opposed to making comparisons by memory.
SOUND FIRST:
BASS: Warm, lots- some really good slam. These "ear speakers" go low and give some rumble like I have not heard a Balanced Armature iem do (yet). Wouldn't want more bass than this. Great amount of full/fun bass to me.
MIDS: Good amount of midrange, very warm though...not the clearest.
TREBLE: Here they seem "just right" or "just north of neutral" (which I seem to prefer in my treble). I think they balance well in the presentation to add detail to the warm bass and midrange. A little peaky. I tend to like treble so some might think it a bit much. I certainly don't think it's too much, I think it is necessary. (But then I like Grados!)
OVERALL: A nice balance/amount of everything, but a bit warm/natural/relaxed in the midrange and full in bass so the Coppers can give a feeling of a lack of speed/clarity. Lush, warm, relaxed, enjoyable listening without "digital" harshness. Sounds like a nice warm speaker set-up with some "Loudness" and some treble EQ'd up instead of a "bright" or "analytical" neutral monitoring system to me.
In comparison to my Triple-Fi 10 which many have heard and are not <too> far off in price ($188 vs. $219 on Amazon.com):
-Coppers win on warm bass + slam by a bit and TF10 win for sparkly treble/upper mids by a bit.
-Coppers win for natural or laid back listening presentation and TF10 win for speed/clarity (though there is bloom in the TF10 bass too).
I recently found this updated repository of Frequency Response and other data:
The charts won't tell you everything but it seems pretty consistent with what my impressions are...
(Now I will try some different set-ups of gear with reference tracks to get a sense of how the sources/amps can work with or tune the Copper "sound"...here are some notes.)
GEAR USED:
-Mac G5 via Optical out to Benchmark DAC1 and built-in amp (Main System)
-Sony X portable player (no effects or EQ unless noted) ~$230
-AMB mini^3 portable amp (made to gain of 2, High Performance option by Mister X- no relation to Sony) $130
-iBasso D12 portable DAC/Amp (with stock L/R opamps and dummy buffers installed) $285
The Coppers are very revealing of source and amp characteristics. They can be used straight out of a portable player and I recommend to do that for a while to learn and get used to the Copper "sound" and also to see how well you can get the Coppers to sound with your player. Then when you have an idea of any areas you would like to improve or modify, you can start shopping for an amp if you want to try one. A headphone amp can add bass impact, widen the soundstage and provide more imaging of instruments, or make the instruments more "punchy" and/or clear. I'm now surprised when I see purchases of portable amps before receiving and listening to the phones that will be used. (Hey, a year ago I didn't believe in any change from a headphone amp at all...)
Starting out listening with the Sony X and the AMB mini^3 portable amp to some Pop, Rock, Classical, and Soundtracks...
David Gray, White Ladder "Please Forgive Me": No sibilance (my sibilance test track), but there is still sparkle on the percussion...lots of low and midrange warmth for a big, lush presentation with some detail. At 4:28 you hear the cymbals clearly AND get the sub-bass hit. Listening with the Benchmark DAC1, there is much tighter, defined imaging and instrument separation on the cymbals, more control of the bass (tighter), but mids seem a little more recessed. More bass impact with Sony and the mini^3 plus the mids are a bit more forward. The mini^3 seems a bit brighter so it all seems a bit clearer, but also closer together in instrument presentation (narrow soundstage).
Massive Attack, 100th Window "Everywhen" (with Benchmark DAC1): Massive Attack has been a reference band for all of my phones. I am not always listening to Massive Attack (or drinking Dos Equis) but when phones have impact, Massive Attack shows it. In fact, the BIG bass of Massive Attack may be causing a little sporadic crackling in the right driver which has "flexed" under the pressure of the ear vacuum seal...I will have to monitor that. (See my description of "driver flex" under these listening notes.) As far as the sound goes, nothing is harsh though there is high-end shimmer. I find I turn it up and don't get harsh high-end but a big and full low to the midrange sound. There's impact but it isn't too much high-energy in the treble or too hard hitting in the bass so as to cause fatigue. (Might actually be able to listen to Massive Attack all day and enjoy it with these...) The warmth here is a plus.
Need to explain "driver flex": At first I had some problems with "driver flex" which may occur when there is too much of a vacuum (or air pressure that affects the driver). I could make the right driver "flex" out of position within the housing. I could hear the driver "flex" or "pop" out of position and stop working. After playing with the driver and the pressure in my ear, it adjusts or "pops" back into place and makes sound again. The Quick Start Guide warns not to place the tips too far into the canals or to get too much of a vacuum built up. I have also found in customs that you want a decent seal but not "too much of a vacuum" or the drivers can't work properly and/or sound can't travel properly. So, after warming up the tips and then twisting them to get a better (but-not-too-strong-of-a) seal, the driver flex occurrence became rare with practice. (I might have caused it by wanting to stick the whole thing in my ear when I got them since I am now used to customs. (One of the benefits of customs is a very positive fit and a great seal but you can still be aware of them filling your whole ears, one of the benefits of Universals is that the tips can be comfortable enough as to not really feel them. They both take practice and getting used to them. It's worth the hassle to get the sound wherever and whenever you want it.)
Elbow, The Seldom Seen Kid "Mirrorball" (with the Benchmark): Wow...the kick-drum just seemed to move air in my head and the strings are smooth and beautiful while the vocals remain very intimate and detailed. This is a showcase for how beautiful the Coppers can sound. I wondered if this would test the Coppers' resolution and sound congested as Elbow tests some phones and systems with complex sound. Instead, I don't want to move to the next track...very, very nice! In fact, I did jump around more Elbow and to Cast of Thousands "Fugitive": Something works really well here and Elbow is just amazing with the big-sounding Coppers. ANTHEMIC, not anemic (at all).
Jeff Buckley, Grace "Hallelujah" (with Benchmark DAC1): Thought this warm track would be smooth and pretty. It is, but with some added warmth of the Coppers it loses a bit of "space" or "air" that gives the track an even more intimate and disconsolate feel...
Talk Talk, Laughing Stock "New Grass" (with Benchmark) is just a big, lush, warm field to lie in. Everything sings, resonates, and rings. A touch "wooly" in the midrange with regards to clarity, however.
Pink Floyd, DSOTM "Time" (with Benchmark): The intro is a good way to check for treble "sparkle" and the Coppers have it, not too bright either. Then the guitar and drums come in and you can hear that the vocals are nice in quality, the sparkle is there, and the bass is prominent in quantity. Big Bass.
Mozart: Requiem In D Minor, K 626 - Sequentia: Rex Tremendae (Sony X with mini^3): The Coppers sound great with a lot of classical music to me, I was especially impressed with the way they sounded with this track. The Coppers didn't sound recessed or bumped along the frequency range with this piece.
Radiohead- Extra Track, The King of Limbs "Supercollider" (with Benchmark): The glitchy, reverberating bass tells you that you have one heck of a seal because it feels like a really big, tight rubberband is being snapped in your ear canals. Vocals are floating on top and are definitely at a lower level than the bass. But it is such a cool sensation that it doesn't really matter right now...
The way the Coppers sound with the bit of classical music I tried led me to guess that these are really good iems for soundtracks. A problem with some iems is that they cannot produce the fullness or the rumble that you get and expect in a theater...since the Coppers have a strong bass presence they should be good (and they are)...
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