Having auditioned the Audio Technica LS50 a few days ago, I’m excited to take an extended look at its sister model, the ATH-LS70.  But at $129, what kind of sound are we looking at?  And how does it compare to its more affordable counterpart?
Audio Technica ATH-LS70 Review
The LS70 comes with five pairs of eatips and a soft carrying pouch – pretty much all you need with a decent earphone.
Utilizing a hard plastic shell, the earpieces feel solid, if also a little bulky.  However, those earpieces sport an angled design that hugs the contours of my ears.  This design, coupled with the wealth of eartips, offers a superior level of comfort I won’t soon forget.
The removable cable measures 4 ft (1.2 m) and uses an A2DC connection. Â Ending in a right-angle 3.5mm audio plug, this cable oozes durability and confidence. Â A solid built-in mic and remote compliment the sturdy cable, offering support for most smartphones.
Specs
Frequency Range: 5-26,000 Hz
Impedance: Â 24.3 ohms
Sound Pressure Level (SPL): Â 101 dB
Total Harmonic Distortion (THD): Â NA
The specifications reveal a headphone with a fairly standard frequency range, albeit with a bit more room in the low end. Â A low nominal impedance of just 24.3 ohms will pair well with any portable device, while the 101 dB Sound Pressure Level ensures decent volume. Â Total Harmonic Distortion, while not provided by Audio Technica, still seems low – somewhere around the <0.3% mark.
Low End
With good detail and bumping bass, the low end on the LS70 instantly reveals itself to be a powerhouse. Â Ample control keeps bleed at an imperceptible level, and a lack of compression or distortion results in a fairly pristine listening experience.
Mids
Like the lows, the mids offer a decent amount of detail. Â However, unlike the lows, the mids house slight compression – specifically, in the upper mids. Â While not a total debacle, this small hiccup won’t impress many critical listeners – but the LS70 still provides enough detail in the midrange for casual enjoyment.
High End
Sightly bright, but more relaxed as a whole, the high end on the LS70 offers a refined listening experience. Â At once smooth and detailed, the resultant sound never comes close to piercing or uncomfortable – and yet it still nails the high highs.
Soundstage
Like most earphones, the ATH-LS70 suffers a poor sense of placement by virtue of its design. Â However, there’s still plenty of depth in these earphones. Â So, while not incredibly realistic, that soundstage is still roomy enough to offer some amazing listening sessions.
Other Observations
Like the LS50, the LS70 offers a fairly dynamic listening experience. Â The mids are a bit more detailed on the LS70, though, resulting in an overall more-improved sound.
These ‘phones excel anywhere that the intense lows and highs can be put through the paces – rock, hip hop, or even electronic music tracks sound golden.  The particularly clean and detailed lows are especially well-suited for rock music utilizing plenty of instrumentation – such as math rock or progressive rock.
Recommendations
If you’re searching for a mid-heavy listening experience, the LS70 may not be your best bet.  I would instead recommend the less expensive Grado iGe for $99.  While the iGe’s remote is not universal, the earphone does offer better midrange performance.
For dynamic sound, though, the ATH-LS70 presents a clear challenge to any would-be competitor. Â It’s definitely a step above the $79 LS50 – enough so that I would recommend serious listeners skipping the cheaper model and splurging a bit on the LS70. Â The vastly improved sound is well worth the extra money.
Final Analysis
With hard-hitting lows and highs, the $129 Audio Technica ATH-LS70 presents a formidable listening experience. Â Despite some compression in the mids, this earphone still offers a mesmerizing listening experience – especially where a grand, dynamic sound is preferred.
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