In-Ear Monitors · owner-verdict comparison

Timeless vs Letshuoer S12 Pro: what real owners say

Real owners rate these about evenly: 67% of 175 Timeless owners recommend it, vs 66% of 106 for the Letshuoer S12 Pro.

Verdicts aggregated from Reddit, enthusiast forums, and YouTube owner comments — affiliate reviews excluded. Sample sizes differ; judge accordingly. How we score

Timeless

67%of 175 owners recommend
67% recommend · 15% neutral · 18% don't
Owners praise
  • Exceptional detail, resolution, and soundstage/imaging for a planar IEM, owners repeatedly call out layered, resolving sound and speed of response that's hard to top
  • Outstanding value, owners who paid $130-$202 call it a easy pick, a bargain, and say it punches way above its price class
  • Beats gear costing far more, with owners naming Sennheiser IE800, 64 Audio U18s, JH Audio Roxanne customs, and pricier trihybrids as being outperformed
Owners complain about
  • Treble sibilance and harshness (often tied to an 8kHz peak) that some owners find fatiguing or even painful over long sessions
  • Some owners hear it as thin, gutless, or lacking mid-range punch, with an artificial/metallic timbre compared to DD or BA hybrids at similar prices
  • Unit-to-unit QC inconsistency, reports of channel imbalance, rattling bass distortion, and one earpiece losing sound when the head is tilted
Full owner report →

Letshuoer S12 Pro

66%of 106 owners recommend
66% recommend · 19% neutral · 15% don't
Owners praise
  • Detailed, clear, technical sound
  • Great value for the price
  • Responds superbly to EQ
Owners complain about
  • Bright, sometimes harsh treble
  • Needs EQ to sound its best
  • Metallic timbre on vocals
Full owner report →

Which should you buy?

Get the Timeless if
  • ✓Bass-loving planar fans wanting big sub-bass slam without spending $500+
  • ✓Budget-conscious enthusiasts scaling up power via desktop amps/DACs
  • ✓Listeners of EDM, hip-hop, rock, and industrial wanting energetic, detailed sound
  • ✓Buyers who plan to swap stock tips/cable for foam or aftermarket tips
Skip it if
  • Treble-sensitive listeners who can't tolerate sibilance or an 8kHz peak
  • Fans of neutral, natural, or vocal-forward tunings over bassy/metallic timbre
Get the Letshuoer S12 Pro if
  • ✓Value-seekers wanting a technical planar under $200
  • ✓EDM, rock, and metal listeners who like energetic sound
  • ✓Listeners comfortable using EQ to tune the treble
  • ✓People wanting a small IEM for long listening sessions
Skip it if
  • Treble-sensitive listeners who won't EQ
  • Bassheads wanting thick, weighty low end

What Timeless owners say

“My personal experience with the Timeless though, Im extremely impressed.”
— @phalanger1 on YouTube
“for the $202 I paid yes, they are worth the hype. I’m pretty happy.”
— @quikspecv4d on YouTube
“I also bought the 7Hz because of the Hype and I don't like it.”
— @SmashKuro on YouTube

What Letshuoer S12 Pro owners say

“The S12 is brighter than the HeyDay (to my ears), so I would recommend a warmer amp source to really make them shine, and I would assume that they would pair great with tube amps”
— GlenAppleton on Head-Fi
“I just love my S12 PRO.”
— @fhreire on YouTube
“The bass on most planars including the S12PRO decays quickly. Gives the entire sound profile a lighter note weight and no amount of tip rolling will change that aspect (I went through 12 pairs).”
— StolenServiceAnimal on Reddit

Timeless vs Letshuoer S12 Pro: frequently asked questions

Is the Timeless or the Letshuoer S12 Pro better?

Real owners rate these about evenly: 67% of 175 Timeless owners recommend it, vs 66% of 106 for the Letshuoer S12 Pro.

Who should get the Timeless?

Owners point the Timeless at bass-loving planar fans wanting big sub-bass slam without spending $500+, and budget-conscious enthusiasts scaling up power via desktop amps/DACs.

Who should get the Letshuoer S12 Pro?

Owners point the Letshuoer S12 Pro at value-seekers wanting a technical planar under $200, and eDM, rock, and metal listeners who like energetic sound.

What do owners complain about?

The most-cited downside of the Timeless is treble sibilance and harshness (often tied to an 8kHz peak) that some owners find fatiguing or even painful over long sessions. For the Letshuoer S12 Pro, it's bright, sometimes harsh treble.