These sit in different size classes, so this is not a straight ranking comparison. The Rocksteady Stadium 2.0 ranks #88 of 182 medium speakers by sound quality at $399.99; the Vifa Helsinki ranks #1 of 126 large speakers by sound quality at $449.
The Rocksteady Stadium 2.0 is the longer-running, lighter choice. A battery powered 2.1 kit of two satellites and a subwoofer that link wirelessly, with very long battery life. It is rated for 30 hours of battery against 8 for the Vifa Helsinki. At 2.2 lbs (1 kg) it weighs noticeably less than the Vifa Helsinki at 3.1 lbs (1.4 kg). The catch: No independent measurements yet, so its sound and output can’t be compared with ranked speakers.
Why pick the Vifa Helsinki: A superb sounding battery powered speaker, with exceptionally clean mids and treble, now discontinued but worth buying used. The catch: No TWS pairing, looks like a purse, requires a hacked Vifa app (Android only post #48) to enable night mode to sound good.
Worth knowing: the Vifa Helsinki is discontinued, though it still ranks #1 of 126 large speakers by sound quality, so a used unit beats most of what is still sold new.
Buy the Rocksteady Stadium 2.0 at $399.99 for a medium speaker, or the Vifa Helsinki at $449 for a large speaker instead.
Want more options? Browse the full Portable Bluetooth rankings.
Prices on this page were last checked November 14, 2026 at 6:17 PM UTC. Product prices and availability are accurate as of that date/time and are subject to change; the price and availability shown on Amazon at the time of purchase will apply to the purchase of this product.
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Specifications Side By Side
| Rocksteady Stadium 2.0 | Vifa Helsinki | |
|---|---|---|
| Price | $399.99 | $449.00 Discontinued |
| Ranked | #88 of 182 in Medium Size Portable Bluetooth Speakers | #1 of 126 in Large Size Portable Bluetooth Speakers |
| App | No | No (official app is broken, 3rd party android app only) |
| EQ | No | No |
| Bluetooth Version | 5.0 | 4.1 |
| Drivers | Satellites: 1x 30mm (1.2”) tweeter + 1x 70mm (2.75”) mid/bass + 2x 74mm passive radiators each; Sub: 1x 130mm (5.1”) bass driver + passive radiator | 2x 50mm fullrange, 2x 66mm woofers + 2x passive radiators |
| Amplifier Power | 30W per satellite, 30W subwoofer | 50W |
| Maximum SPL | 102dB per satellite, 96dB subwoofer (Manufacturer specified) | - |
| Frequency Response | 60Hz - 20kHz satellites, 30Hz - 350Hz subwoofer (Manufacturer specified) | 58Hz - 18kHz (Manufacturer specified) |
| Battery Life | 30 hours (Manufacturer specified) | 8 hours (Manufacturer specified) |
| Aux Input | Yes | Yes |
| Stereo | Yes | Partially (shared woofer) |
| Omnidirectional | No | No |
| TWS | Yes | No |
| Power Input | USB-C | AC Power brick |
| Dimensions | 5.9”H x 4.3”W x 4.3”D (150 x 110 x 110 mm) (satellite) | 6.1” x 8.3” x 2.8” (156 x 210 x 70 mm) |
| Weight | 2.2 lbs (1 kg) per satellite, 4.7 lbs (2.15 kg) subwoofer | 3.1 lbs (1.4 kg) |
| Bluetooth | Yes | Yes |
| Bass Extension (-10dB) | - | 48Hz |
| Bluetooth Codecs | - | aptX, SBC |
| IP Rating | - | None |
| Party Mode | - | No |
| Built-in Microphone | - | Yes |
| Power Bank | - | No |
| Digital Aux Input | - | No |
| Strap | - | Yes (built-in strap) |
Where the Ratings Come From
- Rocksteady Stadium 2.0: manufacturer specifications and listening comparisons; no independent measurement has been published yet.
- Vifa Helsinki: reviews by Joy & Oluv’Sone, Oluv and Alan Ross.
This comparison is generated from the ratings, specifications and measurements on each product’s own page, and it updates when that data changes. How we rank explains how each rating is decided.
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