Sennheiser CX 400BT True vs Sennheiser IE 300 IEM

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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Open head-to-head

Sennheiser CX 400BT True Wireless - In-Ear Earbud - Black Sennheiser Now ₹16,990 at AVStore At its lowest recorded price ★★★★★ 4.8 4.8 · 470 reviews Full prices & history

Sennheiser IE 300 IEM Sennheiser Now ₹10,990 at Headphone Zone At its lowest recorded price ★★★★★ 4.7 4.7 · 23 reviews Full prices & history

What is being compared

Both sides are earphones. The rows below are the facts each store publishes for this shelf - type, form factor, connectivity, codecs, mic and playtime. A dash means the listing does not state that spec.

Spec Sennheiser CX 400BT Sennheiser IE 300 IEM

Connectivity True Wireless (TWS) Wired

Form factor Earbud (flat-head) —

Connector — MMCX

Measured tuning, side by side

Both curves are real community measurements (gold: Sennheiser CX 400BT · ink: Sennheiser IE 300 IEM). Each is level-aligned to its own 200 Hz–1 kHz mean, so rig offsets don't skew the comparison.

Sennheiser CX 400BT Sennheiser IE 300 IEM

Tuning distance ±1.65 dB RMS 90% 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 Sennheiser CX 400BT −1.2 dB Average level difference in this band, both curves aligned to their own 200 Hz–1 kHz mean. Plus means Sennheiser CX 400BT plays louder there on the measured files; minus means Sennheiser IE 300 IEM does.

Mids · 250–2,000 Hz Sennheiser CX 400BT +0.2 dB Average level difference in this band, both curves aligned to their own 200 Hz–1 kHz mean. Plus means Sennheiser CX 400BT plays louder there on the measured files; minus means Sennheiser IE 300 IEM does.

Treble · 2,000–10,000 Hz Sennheiser CX 400BT −1.4 dB Average level difference in this band, both curves aligned to their own 200 Hz–1 kHz mean. Plus means Sennheiser CX 400BT plays louder there on the measured files; minus means Sennheiser IE 300 IEM 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.

Sennheiser CX 400BT True Wireless - In-Ear Earbud - Black Now ₹16,990 at its 30-day median Lowest on record ₹16,990 on Saturday, 12th Sept, 2026 In stock at 1 tracked store

Sennheiser IE 300 IEM Now ₹10,990 at its 30-day median Lowest on record ₹10,990 on Wednesday, 7th Oct, 2026 In stock at 2 tracked stores

Price gap right now ₹6,000 35% of the dearer one's price.

Stores with it in stock 1 vs 2 Active stores carrying each one right now - more stores usually means easier replacement and a steadier price.

The decision, factually

Cheaper right now Sennheiser IE 300 IEM Lowest current price across all tracked stores - ₹10,990 vs ₹16,990.

Deepest discount ever seen Sennheiser IE 300 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: Sennheiser CX 400BT EQ preset: Sennheiser IE 300 IEM All Earphones & TWS More comparisons