DUNU DK4001 HiFi Audio vs HiBy x FAudio - Project

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.

DUNU DK4001 HiFi Audio Hi-Res Beryllium PVD 5 Driver Hybrid Earphone - DK-4001 DUNU Now ₹85,567 at HiFiGo Lowest on record ₹85,495 on Friday, 16th Oct, 2026 Full prices & history

HiBy x FAudio - Project ACE Dynamic Driver IEM HiBy Out of stock at every tracked store Lowest on record ₹20,715 on Thursday, 22nd Oct, 2026 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 DUNU HiBy

Driver configuration — Dynamic (DD)

Impedance 32Ω —

Sensitivity 112dB —

Connectivity Wired Wired

Connector mmcx —

Plug 3.5mm/4.4mm/2.5mm —

Measured tuning, side by side

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

DUNU HiBy

Tuning distance ±1.91 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 DUNU −0.8 dB Average level difference in this band, both curves aligned to their own 200 Hz–1 kHz mean. Plus means DUNU plays louder there on the measured files; minus means HiBy does.

Mids · 250–2,000 Hz DUNU +0.4 dB Average level difference in this band, both curves aligned to their own 200 Hz–1 kHz mean. Plus means DUNU plays louder there on the measured files; minus means HiBy does.

Treble · 2,000–10,000 Hz DUNU −2.3 dB Average level difference in this band, both curves aligned to their own 200 Hz–1 kHz mean. Plus means DUNU plays louder there on the measured files; minus means HiBy 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.

DUNU DK4001 HiFi Audio Hi-Res Beryllium PVD 5 Driver Hybrid Earphone - DK-4001 Now ₹85,567 1% below its 30-day median Lowest on record ₹85,495 on Friday, 16th Oct, 2026 In stock at 1 tracked store

HiBy x FAudio - Project ACE Dynamic Driver IEM No tracked offer in stock In stock at 0 tracked stores

Price gap right now n/a Both sides need a tracked offer to compare.

Stores with it in stock 1 vs 0 Active stores carrying each one right now - more stores usually means easier replacement and a steadier price.

The decision, factually

Cheaper right now DUNU DK4001 HiFi Audio Hi-Res Beryllium PVD 5 Driver Hybrid Earphone - DK-4001 Lowest current price across all tracked stores.

Deepest discount ever seen HiBy x FAudio - Project ACE Dynamic Driver IEM From each product's own recorded price history.

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

Keep going

EQ preset: DUNU EQ preset: HiBy All IEMs More comparisons