Short answer: the Onn Portable FM Boombox. Both are rated 4.2/5 for sound quality (#26 and #23 of 115 large speakers), and the Onn Portable FM Boombox costs $74.83 against $199.99 for the Teufel Rockster Cross, and with sound quality even, the cheaper one is the better buy.
The Onn Portable FM Boombox is the tougher choice. An excellent value waterproof boombox that floats, with reasonably deep bass, FM radio, lights and a long battery. It is rated IPX7 against IPX5 for the Teufel Rockster Cross. It links with other speakers (Party Sync, pairs with 1 other onn. speaker), which the Teufel Rockster Cross cannot. Watch for: Reasonable frequency response, but not quite as smooth as some of the top-ranked speakers in this size.
The case for the Teufel Rockster Cross: A splash resistant speaker with fairly neutral, vocal focused sound and punchy, controlled bass that suits rock and jazz. The tradeoff: Outdoor mode can sound somewhat harsh due to the 4kHz peak.
Buy the Onn Portable FM Boombox. Both are rated the same for sound quality, and it costs $125.16 less than the Teufel Rockster Cross.
Still deciding? The full Portable Bluetooth rankings cover every ranked option.
An excellent value waterproof boombox that floats, with reasonably deep bass, FM radio, lights and a long battery.
A splash resistant speaker with fairly neutral, vocal focused sound and punchy, controlled bass that suits rock and jazz.
Prices on this page were last checked October 31, 2026 at 7:11 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
| Onn Portable FM Boombox | Teufel Rockster Cross | |
|---|---|---|
| Price | $74.83 | $199.99 |
| Ranked | #26 of 115 in Large Size Portable Bluetooth Speakers | #23 of 115 in Large Size Portable Bluetooth Speakers |
| Battery Life | 16 hours (Manufacturer specified) | 16 hours (Manufacturer specified) |
| IP Rating | IPX7 | IPX5 |
| Amplifier Power | 25W RMS (100W peak) | 30W |
| FM Tuner | Yes (10 presets) | - |
| Built-in Microphone | Yes | Yes |
| Power Bank | Yes (USB-A) | Yes (USB-A) |
| Power Input | USB-C | DC barrel jack |
| Weight | 4.9 lbs (2.22 kg) | 5.3 lbs (2.4 kg) |
| Dimensions | 13.8” x 5.9” x 7.7” (350 x 149 x 195 mm) | 15” x 6.3” x 5.1” (380 x 160 x 130 mm) |
| Drivers | 2 speakers | 5” woofer, 2x textile dome tweeters + 2x passive radiators |
| TWS | Yes | Yes |
| Party Mode | Yes (Party Sync, pairs with 1 other onn. speaker) | No |
| App | No | No |
| EQ | No | No |
| Aux Input | Yes | Yes |
| Digital Aux Input | No | No |
| Removable Battery | No | - |
| Omnidirectional | No | No |
| Bluetooth | Yes | Yes |
| Bluetooth Codecs | SBC (inferred; additional codecs unverified) | SBC, aptX |
| Lights | Yes | - |
| Stereo | Yes | Partially |
| Bass Extension (-10dB) | - | 51Hz |
| Bluetooth Version | - | 5.0 |
| Frequency Response | - | 50Hz - 20kHz (Manufacturer specified) |
| Strap | - | Yes (detachable shoulder strap) |
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