FATfreq x HBB Deuce vs HeartField CU8 - 3.5MM

Every tracked fact about the two, side by side - prices, history lows, ratings and measured tuning. No verdict: which one to buy is the visitor's decision, always.

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FATfreq x HBB Deuce | Dynamic Universal IEMs - 3.5mm

FATfreq x HBB Deuce FATFreq Now ₹22,478 at Bloom Audio Lowest on record ₹239 on Thursday, 5th Nov, 2026 ★★★★★ 4.6 4.6 · 52 reviews Full prices & history

HeartField CU8 - 3.5MM heartfield Now ₹37,717 at Linsoul Lowest on record ₹396 on Wednesday, 4th Nov, 2026 ★★★★★ 4.6 4.6 · 5 reviews Full prices & history

What is being compared

Both sides are in-ear monitors. The rows below are the facts each store publishes for this shelf - driver arrangement, impedance, sensitivity, plug and connectivity. A dash means the listing does not state that spec.

Spec FATFreq heartfield

Driver configuration Dynamic (DD) —

Connectivity Wired Wired

Plug 3.5mm 3.5mm

Measured tuning, side by side

Both curves are real community measurements (gold: FATFreq · blue: heartfield). Each is level-aligned to its own 200 Hz–1 kHz mean, so rig offsets don't skew the comparison.

FATFreq heartfield

Average level per band, relative to that curve's own 200 Hz–1 kHz middle - a taller bar plays louder there on the measured files. Same colours as the chart above.

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Hear them side by side

Signal A B

Hear A Hear B

Your earphones / headphones

Wearing your own earphones or headphones? Pick them here and the player pre-corrects for their sound, so the demo plays the target tuning itself - not both mixed together.

Same signal through both tunings at once - slide to blend. Start on pink noise for the clearest read.

Tuning distance ±1.82 dB RMS 89% match - Very close. Computed on a shared 40-point log grid, 20 Hz–10 kHz. A measurement-space fact, not a promise two ears agree.

Bass · 20–250 Hz FATFreq +1.5 dB Average level difference in this band, both curves aligned to their own 200 Hz–1 kHz mean. Plus means FATFreq plays louder there on the measured files; minus means heartfield does.

Mids · 250–2,000 Hz Level Average level difference in this band, both curves aligned to their own 200 Hz–1 kHz mean. Plus means FATFreq plays louder there on the measured files; minus means heartfield does.

Treble · 2,000–10,000 Hz FATFreq +0.5 dB Average level difference in this band, both curves aligned to their own 200 Hz–1 kHz mean. Plus means FATFreq plays louder there on the measured files; minus means heartfield does.

What a curve cannot seeBuild, driver QC unit-to-unit, comfort, isolation, accessories, warranty and resale value sit outside the graph - usually what the pricier one is charging for.

Price over the last 30 days

Daily lowest price across every tracked store, from the site's own price history. The line is one product's own range - the two cards are not drawn to a shared scale.

FATfreq x HBB Deuce Now ₹22,478 1% below its 30-day median Lowest on record ₹239 on Thursday, 5th Nov, 2026 In stock at 1 tracked store

HeartField CU8 - 3.5MM Now ₹37,717 1% below its 30-day median Lowest on record ₹396 on Wednesday, 4th Nov, 2026 In stock at 1 tracked store

Price gap right now ₹15,239 40% of the dearer one's price.

Stores with it in stock 1 vs 1 Active stores carrying each one right now - more stores usually means easier replacement and a steadier price.

The decision, factually

Cheaper right now FATfreq x HBB Deuce Lowest current price across all tracked stores - ₹22,478 vs ₹37,717.

Deepest discount ever seen FATfreq x HBB Deuce From each product's own recorded price history.

This page reports facts and expresses no opinion on which to purchase.

Keep going

EQ preset: FATFreq EQ preset: heartfield All IEMs More comparisons