Short answer: the JBL Xtreme 4 for bass depth, the Teufel Rockster Cross for a neutral, vocal-forward tuning. The Xtreme 4 has a removable battery and slightly deeper bass than the Xtreme 3, but it is costly and an upper-bass-to-midrange dip cannot be EQ’d out. The Rockster Cross is more midrange-focused for rock and jazz with punchy, controlled bass, though Outdoor mode sounds harsh from a 4kHz peak and its bass is not as deep as the Xtreme 4’s.
What the JBL Xtreme 4 gets right: A removable battery, slightly deeper bass than the Xtreme 3, and a custom EQ available online for the best sound quality. Set against that: it’s expensive, carries some bass boost, has a dip between the upper bass and midrange that gives it a strange character no EQ can fix, and gets some upper-mids and treble boost at high volume.
The Teufel Rockster Cross is the better-sounding option. A splash resistant speaker with fairly neutral, vocal focused sound and punchy, controlled bass that suits rock and jazz. It supports aptX Bluetooth, which the JBL Xtreme 4 lacks. It keeps a wired aux input, which the JBL Xtreme 4 lacks. The tradeoff: Outdoor mode can sound somewhat harsh due to the 4kHz peak.
Buy the Teufel Rockster Cross. It is rated higher for sound quality than the JBL Xtreme 4 and costs less, which makes it the one to get unless you need something the other one does better.
There is a real battery-life gap here: the JBL Xtreme 4 is rated for 24 hours, the Teufel Rockster Cross only 16 hours.
Looking for alternatives? See the complete Portable Bluetooth rankings.
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Specifications Side By Side
| JBL Xtreme 4 | Teufel Rockster Cross | |
|---|---|---|
| Price | $309.95 | $199.99 |
| Ranked | #43 of 120 in Large Size Portable Bluetooth Speakers | #23 of 120 in Large Size Portable Bluetooth Speakers |
| App | Yes | No |
| Aux Input | No | Yes |
| Battery Life | 24 hours (Manufacturer specified) | 16 hours (Manufacturer specified) |
| EQ | Yes (5 band) | No |
| IP Rating | IP67 | IPX5 |
| Bluetooth Latency | 220ms | - |
| Maximum SPL | 106dB (measured by Alan Ross Reviews) | - |
| Party Mode | Yes (Auracast) | No |
| Power Bank | Yes (USB-C) | Yes (USB-A) |
| Power Input | USB-C | DC barrel jack |
| Removable Battery | Yes | - |
| TWS | Yes | Yes |
| Weight | 4.6 lbs (2.1 kg) | 5.3 lbs (2.4 kg) |
| Bluetooth | Yes | Yes |
| Bluetooth Codecs | SBC | SBC, aptX |
| Built-in Microphone | Yes | Yes |
| Stereo | Yes | Partially |
| Omnidirectional | No | No |
| Bluetooth Version | 5.3 | 5.0 |
| Dimensions | 11.7” x 5.9” x 5.6” (297 x 149 x 141 mm) | 15” x 6.3” x 5.1” (380 x 160 x 130 mm) |
| Drivers | 2x 70mm woofers, 2x 19mm tweeters + 2x passive radiators | 5” woofer, 2x textile dome tweeters + 2x passive radiators |
| Frequency Response | 44Hz - 20kHz (Manufacturer specified) | 50Hz - 20kHz (Manufacturer specified) |
| Amplifier Power | 100W | 30W |
| Digital Aux Input | No | No |
| Strap | Yes (detachable shoulder strap) | Yes (detachable shoulder strap) |
| Bass Extension (-10dB) | - | 51Hz |
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