>>I am brazilian and I speak portuguese, so forgive my english, I’ll use translation tools to help<<
INTRO:
EarAcoustic is a newcomer to our audio community, but it already has a well-known past, as it is a sister company to the former TFZ – The Fragrant Zither. When I joined in the hobby, TFZ was one of the most well-known brands.
The SPA line has seven different models: SPA Pro; SPA Pro Ultra; SPA Pro Max; SPA High-End; SPA High-End Ultra; SPA High-End Max; and SPA Limited Edition.
The edition we’ll be reviewing today is the SPA High-End.
Price: $149,90 USD
Color: Silver
Cable: Without Mic
EAR ACOUSTIC LINKS:
https://s.click.aliexpress.com/e/_oC1Smio (official store)
https://s.click.aliexpress.com/e/_oD21uTS
https://s.click.aliexpress.com/e/_oFFwx28
SPECIFICATIONS:
Single DD:
- (1) Dynamic Driver (DD) 11mm
– Frequency: 5Hz – 40kHz
– Effective frequency: 20Hz – 20kHz
– Impedance: 23Ω
– Sensitivity: 111dB
– THD: <0.5%
– Termination plug: 3.5mm
– Connectors: 2pin 0.78mm (detachable)
– Cable size: 1.2m
– Cable: Silver-Plated Copper OFC
– Shell: 3D resin with matte silver spraying
– IEM weight: 5.4g (one side)(without eartips)
– Cable weight: 37.6g
– Total weight (packaging, iems, etc): 342g
– Packaging size: 12cm [H] x 12cm [W] x 12cm [D]
UNBOXING:
PHYSICAL ASPECTS:
Construction:
- The shell is made of 3D resin.
- Semi-custom design (pre-molded).
- Aesthetically appealing (luxurious look).
- Has two vents (ventilation holes).
- Great build quality.
- Great unboxing experience. Premium feelings.
- Good number of accessories.
- Great case. Rigid. Zipper closure.
Eartips:
- There are two types: Normal (standard) and Wide Bore.
- Sizes S/M/L.
- Standard size; if you use M, then it’s M.
- They’re good eartips, but generic.
- For the price, there could be 3 or 4 options (variety).
- I don’t see the need to buy more eartips (subjective).
- I don’t usually use Wide Bore eartips.
- I tested with the “normal” ones [size M].
Cable:
- Silver-plated cable, aesthetically very nice.
- The cable is thicker than I’d like, but isn’t a problem.
- The cable is heavier than I’d like, but isn’t a problem.
- Good/medium malleability.
- Doesn’t get tangled.
- Doesn’t get “memory” (creases).
- No microphonics.
- The earhooks have the coating I prefer, without wavys.
- At first, I found the curvature strange, but in use, they’re fine (earhooks).
- Chin Slider with few to no function.
- 2-pin 0.78mm connectors.
Fit and comfort:
- Good fit – stable in the ears (subjective).
- Very comfortable. Excellent ergonomics.
- Good for medium to large ears.
- Semi-custom design is 8 or 80 (good for some, bad for others).
- Medium insertion.
- Great isolation.
- Quite lightweight, 5.4g.
- Good for long listening times.
- Reminds the design of the Celest Wyvern Abyss or Qing.
Earphone kit (accessories):
- SPA High-End earphones.
- 7 pairs of eartips (S/M/L).
- Cable.
- Carrying case.
- Bracelet with pendant.
- Manual.

















SOUND ASPECTS:
Sound:
- Neutral with an emphasis on bass.
- More present mid-bass, slightly forward upper-mid, and discreet treble.
- “Analog” sound. Good with older recordings.
- Music from the 80s, 70s, or earlier had a better match.
- Good for recordings with less sub-bass or treble.
- Technicalities aren’t the strongest point (for the price).
- Big competitors in the $149 USD price range.
- In this price range or less, there are the Supermix4, Quatio, NA20, EA500LM, Titan S2, etc.
- From the products I’ve tested, $99 USD for the SPA High-End would be good (in my opinion).
Bass:
– Quantitative:
- Moderate to high.
- Not for bassheads.
- Greater emphasis on the mid-bass.
- Sub-bass is present, but not dominant.
- Slight overlap of the mid-bass with the subs.
– Qualitative:
- The bass is full-bodied, filled, with good physicality, texture, and extension.
- They have a more slack, expansive character.
- The definition is good/ok (for the price, it’s below other IEMs).
- Sometimes, the bass sounds slightly muffled.
- For example, a kick drum with a pad inside makes the sound softer.
- The impact is more “softened.”
- They don’t invade the midrange.
- The bass has fun and pair well with older recordings.
- The bass isn’t overly warm; the reduced subs make the sound less warm.
- Good for more acoustic instruments or recordings from the 80s, 70s, or earlier.
Mids:
– Quantitative and qualitative:
- The mids are a bit recessed and the upper-mids are more forward.
- Pinna gain is well-placed. Coherent.
- The upper-mids bring clarity just right.
- I didn’t experience any hearing fatigue in this region.
- I have more sensitivity in this region and didn’t experience any fatigue.
- The definition is good/ok (for the price, it’s below other IEMs).
- I didn’t heard any harshness in any instrument.
- I didn’t heard harshness in any recording I listened to.
- I think it could have a little more airy.
Voices:
- Good performance for both high and low voice types.
- Low-pitched male voices have a commanding presence.
- High-pitched female voices have clarity and good projection, without exaggeration.
- The IEM provide a good balance for both vocal types.
- Good for both, but not excellent for one specific type.
Treble:
– Quantitative:
- Moderate to low treble.
- Not for trebleheads.
- Recommended for those sensitive to treble.
- No hearing fatigue.
- Nothing I heard was overdone.
– Qualitative:
- The treble are smooth, soft, controlled, and well-defined.
- I felt a slight roll-off in the higher treble.
- Natural sparkle. Coherent.
- Good detailing.
- Could have more airy.
- They’re not shrill, sharp, or harsh.
- I didn’t experience any sibilance, peaks, or coloration.
- Good for recordings where the treble aren’t the main focus.
- I don’t consider the SPA High-End to be energetic.
- Chimes and bells, everything I heard was smooth.
- Ride cymbals sound natural, without any sharpness.
Soundstage:
- I found the soundstage to be average.
- Forward upper-mids diminish the sense of depth.
- The soundstage is average in height, width, and depth.
- It plays everything without sounding closed.
Imaging:
- Good instrumental separation. Positive point.
- The IEM have separation between bass and treble, which helps with identification.
- Hybrid IEMs generally have a better advantage here (not a rule).
Driver Flex Test:
- I didn’t experience any driver flex when inserting the IEMs into my ears.
Amplification:
- Easy to push.
- No need powerful amplifier.
- A simple dongle is enough.
- I used the SPA High-End with the FiiO KA11.
- Dongle connected to the computer.
- It will play well directly from smartphones or iPads.
- Volume below 20 (of the 100 available on the W10).
PROS AND CONS:
– Aesthetically beautiful (subjective)
– Luxurious-looking design
– Unboxing experience
– “Analog” sound
– Neutral tuning with bass boost
– Good with older recordings
– Good imaging
– Easy to push
– Great fit and comfort
– Good cable
– Good eartips
– Great case
– Freebie: Wristband
– Price (big competitors in this range)
– Could have more eartips (variety)
– Cable heavier and thicker than I would like (subjective)
– Earhooks too curved (but not a problem)
– Not a very wide soundstage
– Slightly muffled bass
– Technicality isn’t the strongest point
GRAPHS BY THE AUDIO STORE:




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