Exceptional value at its $50-60 price point, with many owners calling it the best IEM they've heard under $100 or even comparing favorably to gear costing far more
Balanced, natural, detailed tuning that isn't fatiguing or shouty for everyday listening
Strong, punchy bass with good extension and separation from the mids, especially with the included 10 ohm adapter
Owners complain about
Wide/large nozzle causes discomfort or pain, especially during longer listening sessions, and doesn't fit all ear shapes
Considered overhyped or overrated relative to the marketing buzz, with several owners feeling it isn't as technical as claimed
Some find the tuning inconsistent depending on preference — either too bassy/boomy or too soft/thin and lacking punch
✓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
Get the Zero Red if
✓Budget-conscious listeners wanting a natural, well-balanced tuning under $100
✓Gamers who want punchy bass and detail for FPS/console play off a dongle
✓First-time IEM buyers looking for an easy, low-risk step up from stock earbuds
✓Bass-forward music fans (EDM, classical, rock) who want extra low-end without mud
Skip it if
Anyone with smaller ears, since the large/wide nozzle causes discomfort and fatigue
Technical-performance chasers wanting flagship-level detail, separation, or soundstage
What Zero Red owners think
Owners overwhelmingly praise the Truthear Zero:Red as an exceptional value pick, with dozens calling it the best IEM they've heard under $100 thanks to its balanced, natural, non-fatiguing tuning and punchy, well-extended bass that beats gaming headsets and pricier IEMs alike. Many say it works great straight out of a phone or dongle. However, a meaningful minority pushes back hard on the hype, finding it overrated and less technical than its reputation suggests, while the most common physical complaint by far is the wide nozzle causing ear discomfort or outright pain on longer sessions. A smaller group also dings the stock cable and earloop fit, and some find the tuning swings too bassy or too thin depending on taste.
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”
“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).”
Letshuoer S12 Pro vs Zero Red: frequently asked questions
Is the Letshuoer S12 Pro or the Zero Red better?
Real owners rate these about evenly: 66% of 106 Letshuoer S12 Pro owners recommend it, vs 63% of 38 for the Zero Red.
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.
Who should get the Zero Red?
Owners point the Zero Red at budget-conscious listeners wanting a natural, well-balanced tuning under $100, and gamers who want punchy bass and detail for FPS/console play off a dongle.
What do owners complain about?
The most-cited downside of the Letshuoer S12 Pro is bright, sometimes harsh treble. For the Zero Red, it's wide/large nozzle causes discomfort or pain, especially during longer listening sessions, and doesn't fit all ear shapes.