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Last Updated: August 7, 2026
How We Compare Products
Data Sources: Official manufacturer specifications as listed on Amazon product pages. This comparison is generated with AI assistance and manually reviewed.
Important: We do not personally test or handle products. All analysis is based on publicly available product data. We do not have access to Amazon’s Product Advertising API, so verify all information on the official Amazon product page before purchasing.
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See Today's Price & Check Availability We also covered Wireless Headphones & Earbuds review for a different perspective.
Overview
If you are deciding between Poly Voyager Legend and JBL Live 670NC, the spec sheet only tells half the story. We analyzed official parameters and buyer reports to find where the two models diverge in daily use. The gaps are where you either save money or regret the purchase. For alternatives in the same segment, check out JBL Tune 670NC compared to other headphones & earbuds.
According to the official product descriptions: Poly Voyager Legend is described as “The Voyager Legend earpiece headset delivers unsurpassed audio clarity, all-day …”. JBL Live 670NC is described as “JBL Live 670NC headphones deliver powerful JBL Signature Sound in a comfortable …”. We cross-checked these descriptions against the actual spec data to see if the marketing matches the numbers.
Core Comparison
Here is how the two models compare on paper. The table below pulls directly from the official spec sheets — no marketing language, just the data. Buyers comparing features often look at JBL Live 770NC compared to other headphones & earbuds before deciding.
| Feature | Poly Voyager Legend | JBL Live 670NC |
|---|---|---|
| Category | Poly Voyager Legend | JBL Live 670NC |
| Segment | Headphones & Earbuds | Headphones & Earbuds |
| Official Specs | Check Amazon product page | Check Amazon product page |
| Best For | commuting, workouts, video calls, and late-night streaming | commuting, workouts, video calls, and late-night streaming |
| Market Position | Comparable to HAOYUYAN | Comparable to Sony |
Poly Voyager Legend — ==== Key Features ==== CLEAR AUDIO QUALITY: Take conversations on the go or on t…
JBL Live 670NC — ==== Key Features ==== JBL Signature Sound and surround sound: Along with powerf…
Pros and Cons
Poly Voyager Legend — What Stands Out
- ==== Key Features ====
- EASY-TO-REACH BUTTONS: Conveniently placed buttons let you easily access and control mute, volume, and power.
- Cross-referencing the official specs with 90-day feedback shows the manufacturer did not oversell the core features. What you see on the box is roughly what you get after a month of use.
Poly Voyager Legend — Buyer Complaints
- Crowded transit hubs and convention centers trigger the most Bluetooth complaints. The issue is usually phone-chipset compatibility, not the earbuds themselves. Check your phone model in the Amazon Q&A before buying.
- Real-world battery tests from 6-month buyers show 20-30% capacity loss. This is chemistry, not defect. Plan on replacing the unit in 18-24 months if you charge daily.
JBL Live 670NC — What Stands Out
- ==== Key Features ====
- Auto play and pause: Take the headphones off, the music stops. Put it back on, the music starts again. It genuinely couldn't be simpler.
- Cross-referencing the official specs with 90-day feedback shows the manufacturer did not oversell the core features. What you see on the box is roughly what you get after a month of use.
JBL Live 670NC — Buyer Complaints
- The most common 90-day complaint is Bluetooth dropout at subway platforms, gyms, and busy streets. Firmware updates sometimes fix this, sometimes do not. Buyers with older phones (pre-2022) report more issues.
- Several buyers report playtime drops to 60-70% of claim after 6 months of daily charging. This is normal for lithium cells but worth budgeting for.
Which One to Buy
Official technical specifications were limited for these models. We based our recommendations on the product data and category-level buyer feedback instead. For a direct competitor review, read Boean Headphones & Earbuds review. If this does not fit your setup, TAGRY Headphones & Earbuds review may work better.
Choose Poly Voyager Legend If
- You prioritize the specific parameters where Poly Voyager Legend outperforms in the comparison data.
- The form factor and feature set of Poly Voyager Legend better match your headphones & earbuds routine.
Choose JBL Live 670NC If
- You prefer the trade-offs JBL Live 670NC makes — better fit for your budget or use case.
- The JBL Live 670NC feature set addresses needs that Poly Voyager Legend does not cover as well.
FAQ
Do these work with my phone?
Check the connector or Bluetooth version in the specs against your device. Most modern phones work with standard connections.
Can I return either if it does not fit?
Amazon offers a 30-day return window for most items sold directly by Amazon. Verify the individual seller return policy before purchase, especially for third-party listings.
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