Sennheiser Momentum True Wireless 4 vs Noble Audio FoKus Rex5
Sennheiser Momentum True Wireless 4 (#4) vs Noble Audio FoKus Rex5 (#5): in our Earbuds for Music scoring the Sennheiser Momentum True Wireless 4 totals 8.8/10 and the Noble Audio FoKus Rex5 8.8/10. At $179 versus $449, the Sennheiser Momentum True Wireless 4 costs $270 less.
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TopsFive comparison scores
Side by side
| Sennheiser Momentum True Wireless 4 | Noble Audio FoKus Rex5 | |
|---|---|---|
| Price | $179 | $449 |
| Driver | 7mm TrueResponse transducer | — |
| Frequency Response | 5Hz-21kHz | 20Hz-40kHz |
| Codecs | aptX Lossless, aptX Adaptive, AAC, LC3 | LDAC, aptX Adaptive, aptX HD, AAC |
| Battery | 7.5h / 30h total | 5-7h / 40h+ total |
| THD | 0.08% at 94dB | — |
| Drivers | — | 5-driver tribrid |
How they differ in real use
Built from our earbuds music scoring, each product's published specifications, and verified owner feedback — not hands-on testing.
Both the Sennheiser Momentum True Wireless 4 and the Noble Audio FoKus Rex5 made our Top 5 Earbuds for Music, at #4 and #5. Natural, vocal-forward signature with aptX Lossless for CD-quality wireless streaming, now regularly discounted to around $179. Four-driver IEM technology delivers ultimate resolution—the most detailed TWS available for critical listeners.
We score earbuds for music on Sound Quality (40%), Codec Support (20%), Soundstage (15%), Comfort (15%) and Value (10%). On that basis the Sennheiser Momentum True Wireless 4 totals 8.8 out of 10 and the Noble Audio FoKus Rex5 8.8. The widest gap is Sound Quality, where the Noble Audio FoKus Rex5 scores 9.9 against 8.9 for the Sennheiser Momentum True Wireless 4 — driver technology and tuning. Codec Support also separates them: 9.5 for the Sennheiser Momentum True Wireless 4 versus 8.4 for the Noble Audio FoKus Rex5. The Noble Audio FoKus Rex5 claws back ground on Soundstage.
On paper, the specifications that actually differ: Frequency Response — 5Hz-21kHz on the Sennheiser Momentum True Wireless 4 versus 20Hz-40kHz on the Noble Audio FoKus Rex5; Codecs — aptX Lossless, aptX Adaptive, AAC, LC3 on the Sennheiser Momentum True Wireless 4 versus LDAC, aptX Adaptive, aptX HD, AAC on the Noble Audio FoKus Rex5; Battery — 7.5h / 30h total on the Sennheiser Momentum True Wireless 4 versus 5-7h / 40h+ total on the Noble Audio FoKus Rex5.
Pricing as of August 5, 2026: $179 for the Sennheiser Momentum True Wireless 4 and $449 for the Noble Audio FoKus Rex5, a $270 difference in the Sennheiser Momentum True Wireless 4's favor. Owners praise the Sennheiser Momentum True Wireless 4 for 7mm TrueResponse transducers and 0.08% THD (among lowest tested); the most common complaint is expensive. Owners praise the Noble Audio FoKus Rex5 for 5-driver tribrid (1x dynamic, 1x planar, 3x BA) and microscope-level micro-detail; the most common complaint is most expensive at $449.
Sennheiser Momentum True Wireless 4
- 7mm TrueResponse transducers
- 0.08% THD (among lowest tested)
- aptX Lossless support
- Best transparency mode in class
- Expensive
- Bulkier than competitors
- App could be better
Noble Audio FoKus Rex5
- 5-driver tribrid (1x dynamic, 1x planar, 3x BA)
- Microscope-level micro-detail
- 'Wizard' tuning by John Moulton
- Resolution approaching wired IEMs
- Most expensive at $449
- Shorter battery (5-7h)
- Niche appeal
Which should you buy?
The Sennheiser Momentum True Wireless 4 is the better fit for vocal and acoustic enthusiasts and those wanting natural timbre — it is the higher-scoring pick here, chiefly for Codec Support and Value. The Noble Audio FoKus Rex5 is the better fit for critical listeners prioritizing sound above all and IEM enthusiasts going wireless, and the stronger choice if Sound Quality and Soundstage matter more to you than the overall score. Since the Sennheiser Momentum True Wireless 4 is both the higher scorer and $270 cheaper, the Noble Audio FoKus Rex5 only makes sense for critical listeners prioritizing sound above all. The Sennheiser Momentum True Wireless 4 is a poor fit for budget shoppers; the Noble Audio FoKus Rex5 is a poor fit for casual listeners.
Choose the Sennheiser Momentum True Wireless 4 if
- Vocal and acoustic enthusiasts
- Those wanting natural timbre
- CD-quality streaming
Skip it if
- Budget shoppers
- Those wanting smallest earbuds
Choose the Noble Audio FoKus Rex5 if
- Critical listeners prioritizing sound above all
- IEM enthusiasts going wireless
- Those wanting ultimate resolution
Skip it if
- Casual listeners
- Budget shoppers
Common questions
Is the Sennheiser Momentum True Wireless 4 better than the Noble Audio FoKus Rex5?
In our Earbuds for Music ranking the Sennheiser Momentum True Wireless 4 scores higher overall, 8.8 to 8.8, with the biggest advantage in Sound Quality. The Noble Audio FoKus Rex5 is stronger on Sound Quality and Soundstage, so it is the better pick if those matter most to you.
How much more does the Noble Audio FoKus Rex5 cost than the Sennheiser Momentum True Wireless 4?
$270 more as of August 5, 2026: $449 for the Noble Audio FoKus Rex5 against $179 for the Sennheiser Momentum True Wireless 4. Prices move, so the merchant page shows the current figure.
What is the main difference between the Sennheiser Momentum True Wireless 4 and the Noble Audio FoKus Rex5?
The headline spec difference is Frequency Response: 5Hz-21kHz on the Sennheiser Momentum True Wireless 4 versus 20Hz-40kHz on the Noble Audio FoKus Rex5. In use, the gap that matters most is Sound Quality (8.9 vs 9.9 in our scoring): driver technology and tuning.