Short answer: the Teufel Rockster Cross on measured sound quality, the Zealot S97 on price. The Teufel Rockster Cross ranks #21 of 78 large speakers at $199.99. The Zealot S97 ranks #46 at $65.86, $134.13 cheaper.
What the Zealot S97 offers: For a compact 3.3kg boombox, the S97 delivers unusually deep, clean-enough bass with a more sensible default balance than many inexpensive Zealot models. It also brings IPX6 protection, aux and microSD playback, power-bank outputs, three EQ presets and PartyAdd linking. Watch for: It is not especially loud for its size, battery life is only a claimed 12 hours, and the bass preset can swamp the rest of the music. There is no app or fine-grained EQ, so the Vocal preset is the only practical way to improve the balance. It is still heavy for a speaker with this output ceiling.
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 Zealot S97 if the price is the priority over sound quality, or the Teufel Rockster Cross if sound quality is the priority over the price.
Want more options? Browse the full Portable Bluetooth rankings.
Specifications Side By Side
| Zealot S97 | Teufel Rockster Cross | |
|---|---|---|
| Price | $65.86 with coupon YZZL10 | $199.99 |
| Ranked | #46 of 78 in Large Size Portable Bluetooth Speakers | #21 of 78 in Large Size Portable Bluetooth Speakers |
| App | No | No |
| Aux Input | Yes | Yes |
| Battery Life | 12 hours (Manufacturer specified) | 16 hours (Manufacturer specified) |
| EQ | 3 EQ presets | No |
| IP Rating | IPX6 | IPX5 |
| MicroSD Playback | Yes | - |
| Party Mode | Yes (PartyAdd up to 100 speakers) | No |
| Power Input | USB-C | DC barrel jack |
| Stereo | Yes | Partially |
| Omnidirectional | No | No |
| TWS | No | Yes |
| Weight | 7.3 lbs (3.3 kg) | 5.3 lbs (2.4 kg) |
| Bluetooth Codecs | SBC | SBC, aptX |
| Built-in Microphone | Yes | Yes |
| Power Bank | Yes (USB-A + USB-C) | Yes (USB-A) |
| Bluetooth Version | 5.2 | 5.0 |
| Dimensions | 12.6" x 7.3" x 5.9" (321 x 185 x 151 mm) | 15" x 6.3" x 5.1" (380 x 160 x 130 mm) |
| Amplifier Power | 80W | 30W |
| Drivers | 2x 76mm (3") woofers + 2x 38mm tweeters + 2x passive radiators | 5" woofer, 2x textile dome tweeters + 2x passive radiators |
| Digital Aux Input | No | No |
| Bass Extension (-10dB) | - | 51Hz |
| 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
Zealot S97: $65.86 with coupon YZZL10 Aliexpress eBay
Pros: For a compact 3.3kg boombox, the S97 delivers unusually deep, clean-enough bass with a more sensible default balance than many inexpensive Zealot models. It also brings IPX6 protection, aux and microSD playback, power-bank outputs, three EQ presets and PartyAdd linking.
Cons: It is not especially loud for its size, battery life is only a claimed 12 hours, and the bass preset can swamp the rest of the music. There is no app or fine-grained EQ, so the Vocal preset is the only practical way to improve the balance. It is still heavy for a speaker with this output ceiling.
Full Zealot S97 review and specifications →
| Amplifier Power | 80W |
|---|---|
| App | No |
| Aux Input | Yes |
| Battery Life | 12 hours (Manufacturer specified) |
| Bluetooth Codecs | SBC |
| Bluetooth Version | 5.2 |
| Built-in Microphone | Yes |
| Digital Aux Input | No |
| Dimensions | 12.6" x 7.3" x 5.9" (321 x 185 x 151 mm) |
| Drivers | 2x 76mm (3") woofers + 2x 38mm tweeters + 2x passive radiators |
| EQ | 3 EQ presets |
| IP Rating | IPX6 |
| MicroSD Playback | Yes |
| Omnidirectional | No |
| Party Mode | Yes (PartyAdd up to 100 speakers) |
| Power Bank | Yes (USB-A + USB-C) |
| Power Input | USB-C |
| Stereo | Yes |
| TWS | No |
| Weight | 7.3 lbs (3.3 kg) |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head 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
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