Short answer: the Teufel Rockster Cross for better sound quality, the onn Portable FM Boombox for the lower price. The Teufel Rockster Cross ranks #21 of 78 large speakers at $199.99. The onn Portable FM Boombox ranks #23 at $74.83, $125.16 cheaper.
What the onn Portable FM Boombox offers: Extremely good value. Reasonably deep bass, though not as deep as something like the JBL Xtreme 3, Soundcore Boom 2, or Tribit Stormbox Lava. IPX7 waterproof and floats. FM radio with 10 presets. 6 multicolor LED lighting effects. Can run on battery or corded power. Watch for: Reasonable frequency response, but not quite as smooth as some of the top-ranked speakers in this size. No custom EQ. Only available in the United States and Canada.
What the Teufel Rockster Cross offers: Pretty neutral frequency response. More vocal/midrange-focused than the JBL Xtreme 4, thanks to a larger mid/bass driver - better suited to rock and jazz. Nicer upper-bass detail than the JBL Xtreme 4. Punchy, well-controlled bass that suits rock music, unlike the Soundcore Boom 2 Plus’s overboosted, uncontrolled bass even at stock tuning. Clear, detailed audio with good vocal presence and solid Bluetooth codec support even a couple years after release. Watch for: Outdoor mode can sound somewhat harsh due to the 4khz peak. Not as deep or full-sounding in the bass as the JBL Xtreme 4.
Buy the onn Portable FM Boombox if the price is the priority over sound quality, or the Teufel Rockster Cross if sound quality is the priority over the price.
Still deciding? The full Portable Bluetooth rankings cover every ranked option.
Specifications Side By Side
| onn Portable FM Boombox | Teufel Rockster Cross | |
|---|---|---|
| Price | $74.83 | $199.99 |
| Ranked | #23 of 78 in Large Size Portable Bluetooth Speakers | #21 of 78 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 | - |
| Discontinued | No | - |
| Omnidirectional | No | No |
| Bluetooth Codecs | SBC (inferred; additional codecs unverified) | SBC, aptX |
| Lights | Yes | - |
| Bass Extension (-10dB) | - | 51Hz |
| Stereo | - | Partially |
| Bluetooth Version | - | 5.0 |
| Frequency Response | - | 50Hz - 20kHz (Manufacturer specified) |
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Prices on this page were last checked September 16, 2026 at 12:41 AM 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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The Two Speakers In Full
onn Portable FM Boombox: $74.83 Walmart eBay
Pros: Extremely good value. Reasonably deep bass, though not as deep as something like the JBL Xtreme 3, Soundcore Boom 2, or Tribit Stormbox Lava. IPX7 waterproof and floats. FM radio with 10 presets. 6 multicolor LED lighting effects. Can run on battery or corded power.
Cons: Reasonable frequency response, but not quite as smooth as some of the top-ranked speakers in this size. No custom EQ. Only available in the United States and Canada.
Full onn Portable FM Boombox review and specifications →
| Amplifier Power | 25W RMS (100W peak) |
|---|---|
| App | No |
| Aux Input | Yes |
| Battery Life | 16 hours (Manufacturer specified) |
| Bluetooth Codecs | SBC (inferred; additional codecs unverified) |
| Built-in Microphone | Yes |
| Digital Aux Input | No |
| Dimensions | 13.8" x 5.9" x 7.7" (350 x 149 x 195 mm) |
| Discontinued | No |
| Drivers | 2 speakers |
| EQ | No |
| FM Tuner | Yes (10 presets) |
| IP Rating | IPX7 |
| Lights | Yes |
| Omnidirectional | No |
| Party Mode | Yes (Party Sync, pairs with 1 other onn. speaker) |
| Power Bank | Yes (USB-A) |
| Power Input | USB-C |
| Removable Battery | No |
| TWS | Yes |
| Weight | 4.9 lbs (2.22 kg) |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
- onn Portable FM Boombox vs Bose SoundLink Plus
- onn Portable FM Boombox vs Sonos Move 2
- onn Portable FM Boombox vs Soundcore Rave Neo 2
- onn Portable FM Boombox vs Soundcore Motion X600
- onn Portable FM Boombox vs JBL Xtreme 3
- onn Portable FM Boombox vs Marshall Middleton II
- onn Portable FM Boombox vs Bose SoundLink Max
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- See all 34 comparisons
Teufel Rockster Cross: $199.99 Amazon eBay
Pros: Pretty neutral frequency response. More vocal/midrange-focused than the JBL Xtreme 4, thanks to a larger mid/bass driver - better suited to rock and jazz. Nicer upper-bass detail than the JBL Xtreme 4. Punchy, well-controlled bass that suits rock music, unlike the Soundcore Boom 2 Plus’s overboosted, uncontrolled bass even at stock tuning. Clear, detailed audio with good vocal presence and solid Bluetooth codec support even a couple years after release. Measured bass extension of 51Hz (-10dB).
Cons: Outdoor mode can sound somewhat harsh due to the 4khz peak. Not as deep or full-sounding in the bass as the JBL Xtreme 4.
Full Teufel Rockster Cross review and specifications →
| Amplifier Power | 30W |
|---|---|
| App | No |
| Aux Input | Yes |
| Bass Extension (-10dB) | 51Hz |
| Battery Life | 16 hours (Manufacturer specified) |
| Bluetooth Codecs | SBC, aptX |
| Bluetooth Version | 5.0 |
| Built-in Microphone | Yes |
| Digital Aux Input | No |
| Dimensions | 15" x 6.3" x 5.1" (380 x 160 x 130 mm) |
| Drivers | 5" woofer, 2x textile dome tweeters + 2x passive radiators |
| EQ | No |
| Frequency Response | 50Hz - 20kHz (Manufacturer specified) |
| IP Rating | IPX5 |
| Omnidirectional | No |
| Party Mode | No |
| Power Bank | Yes (USB-A) |
| Power Input | DC barrel jack |
| Stereo | Partially |
| TWS | Yes |
| Weight | 5.3 lbs (2.4 kg) |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
- Teufel Rockster Cross vs Soundcore Rave Neo 2
- Teufel Rockster Cross vs Bose SoundLink Plus
- Teufel Rockster Cross vs Soundcore Motion X600
- Teufel Rockster Cross vs JBL Xtreme 3
- Teufel Rockster Cross vs Soundcore Motion X500
- Teufel Rockster Cross vs Sonos Move 2
- Teufel Rockster Cross vs Bose SoundLink Max
- Teufel Rockster Cross vs B&O Beoplay A2 active
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