Short answer: these aren’t really direct competitors. The Uboom X ranks #1 out of 113 party-size speakers at $159.99; the Rockster Air 2 ranks #5 at $499.99, roughly $340 more. One is a compact, carry-anywhere Bluetooth speaker; the other is a wheel-free but still substantial party rig built around XLR inputs and long runtime.
The Uboom X is built for portability and tuning accuracy, not scale. At 4.1 kg (9 lbs) it’s a fraction of the Rockster Air 2’s 14.15 kg (31.2 lbs), and our own notes rate its tuning as close to reference-neutral - among the most accurate of any modern Bluetooth speaker, with per-volume EQ correction that keeps it sounding right whether it’s quiet or loud. It also has an IP67 rating the Rockster Air 2 doesn’t carry at all.
The Rockster Air 2 is built for scale and real inputs, not portability. Its 80W output, larger drivers, and full XLR line/microphone/guitar inputs are aimed at filling a bigger space or plugging in real instruments, not fitting in a bag. It even out-lasts the Uboom X on battery, 58 hours against 30, but that number matters less than it sounds like it should - the Uboom X’s small size means you’ll actually carry it to places the Rockster Air 2 never will.
Buy the Uboom X if you want an exceptionally well-tuned, genuinely portable speaker at a fraction of the price. Buy the Rockster Air 2 if you need real output and pro-style inputs for an actual event, not a speaker that fits in a bag.
Water resistance is not close: the EarFun Uboom X is rated at IP67 (brief submersion), well ahead of the Teufel Rockster Air 2 at no water resistance.
Looking for alternatives? See the complete PA & Live Sound rankings and Portable Bluetooth rankings.
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Specifications Side By Side
| Teufel Rockster Air 2 | EarFun Uboom X | |
|---|---|---|
| Price | $499.99 | $159.99 Discontinued |
| Ranked | #5 of 17 in Battery-Powered PA Speakers | #1 of 113 in Boombox Size Portable Bluetooth Speakers |
| Passive | No | - |
| App | No | Yes (Earfun Audio app) |
| Aux Input | Yes | Yes |
| Battery Life | 58 hours (Manufacturer specified) | 30 hours (Manufacturer specified) |
| Bluetooth Codecs | SBC, AAC, aptX, aptX HD | AAC, SBC |
| Bluetooth Version | 5.0 | 5.3 |
| Dimensions | 12.7” x 23.2” x 13.5” (323 x 589 x 343 mm) | 15.7” x 5.9” x 8.5” (400 x 150 x 215 mm) |
| EQ | No | Yes (App EQ) |
| IP Rating | None | IP67 |
| Inputs | XLR microphone, 6.3mm instrument, 3.5mm stereo, Bluetooth | - |
| Party Mode | Yes (Party Link Stereo, 2 speakers; XLR chaining up to 10) | Yes (Party Connect mode, up to 50 speakers) |
| Power Bank | Yes (USB-C) | Yes (USB-C) |
| Power Input | AC Power cord | USB-C |
| Stereo | Yes | Yes |
| Omnidirectional | No | No |
| TWS | Yes | Yes |
| USB Playback | No | No |
| Weight | 31.2 lbs (14.15 kg) | 9 lbs (4.1 kg) |
| Amplifier Power | 80W RMS | 80W |
| Drivers | 2-way: 1x 10” paper woofer, 1x 1” polypropylene tweeter | 2x 102mm (4”) woofers + 2x 20mm tweeters |
| Digital Aux Input | No | No |
| Frequency Response | 47Hz - 22kHz (Manufacturer specified) | - |
| Microphone Input | Yes (XLR) | - |
| Guitar Input | Yes | - |
| XLR Input | Yes | - |
| Maximum SPL | 103dB RMS / 115dB peak @ 1m (Manufacturer specified) | 110dB (measured by Alan Ross Reviews) |
| Configuration | Battery-powered 2-way active PA | - |
| Rigging | 35mm pole mount | - |
| Coverage | 80° H x 40° V | - |
| DSP | No | - |
| Bluetooth | Yes | Yes |
| Cabinet Material | Plastic and MDF | - |
| Aux Latency | - | 16ms |
| Bass Extension (-10dB) | - | ~38Hz |
| Built-in Microphone | - | Yes |
| Bluetooth Latency | - | SBC Video mode 48ms, AAC Video mode 128ms, SBC 112ms, AAC 176ms |
| FM Tuner | - | No |
| Lights | - | Yes |
| Strap | - | Yes (detachable shoulder strap) |
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