‹ Back

FiiO FA9 In-Ear Monitors (Apos Certified) - Black vs HARMONICDYNE P.D.1 Planar DD In-ear Headphone

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.

FiiO FA9 In-Ear Monitors (Apos Certified) - Black FiiO FA9 In-Ear Monitors (Apos Certified) - Black FiiO Out of stock at every tracked store Lowest ever ₹35,647 on Thursday, 15th Oct, 2026 ★★★★★ 5.0 5.0 · 1 reviews Full prices & history
HARMONICDYNE P.D.1 Planar DD In-ear Headphone HARMONICDYNE P.D.1 Planar DD In-ear Headphone harmonicdyne Out of stock at every tracked store Lowest ever ₹36,100 on Thursday, 15th Oct, 2026 Full prices & history

Measured tuning, side by side

Both curves are real community measurements (gold: FiiO FA9 In-Ear Monitors (Apos Certified) - Black · ink: HARMONICDYNE P.D.1 Planar DD In-ear Headphone). Each is level-aligned to its own 200 Hz–1 kHz mean, so rig offsets don't skew the comparison.

201001k10k17-2-22
FiiO FA9 In-Ear Monitors (Apos Certified) - Black HARMONICDYNE P.D.1 Planar DD In-ear Headphone
Tuning distance±4.86 dB RMS71% match - Close. Computed on a shared 40-point log grid, 20 Hz–10 kHz. A measurement-space fact, not a promise two ears agree.
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.

The decision, factually

Cheaper right nown/aLowest current price across all tracked stores.
Deepest discount ever seenFiiO FA9 In-Ear Monitors (Apos Certified) - BlackFrom each product's own recorded price history.

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