Different classes, so treat this as a step-up-or-not question rather than a head-to-head. The Teufel Rockster Air ranks #9 of 14 battery-powered PA speakers by sound quality; the Sony GTK-XB90 ranks #39 of 43 party speakers by sound quality at $429.
Why pick the Teufel Rockster Air: Exceptional 58-hour battery (31 hours at full volume with ECO mode). The catch: Peaky midrange, not very natural sounding.
What the Sony GTK-XB90 does well: Deep punchy EXTRA BASS technology for party use. Watch for: Bass is muddy and not deep, weird midrange peak, rolled off treble and overall strange tuning.
One note: the Teufel Rockster Air is no longer in production and isn’t widely stocked new anymore.
Buy the Teufel Rockster Air if you want a battery-powered PA speaker. Buy the Sony GTK-XB90 if you want a party speaker instead.
Battery life favors the Teufel Rockster Air: rated for 30 hours against 16 hours for the Sony GTK-XB90.
Looking for alternatives? See the complete PA & Live Sound rankings and Portable Bluetooth rankings.
Specifications Side By Side
| Teufel Rockster Air | Sony GTK-XB90 | |
|---|---|---|
| Price | €500 Discontinued | $429 Discontinued |
| Ranked | #9 of 14 in Battery-Powered PA Speakers | #39 of 43 in Party Size Portable Bluetooth Speakers |
| App | No | No |
| Aux Input | Yes | Yes |
| Bass Extension (-10dB) | ~52Hz | ~50Hz |
| Battery Life | 30 hours (Manufacturer specified) | 16 hours (Manufacturer specified) |
| Bluetooth Codecs | aptX, SBC | SBC, AAC, LDAC |
| Bluetooth Version | 4.0 | - |
| Dimensions | 11.8” x 21.3” x 11” (300 x 540 x 280 mm) | 13.2” x 26.4” x 13.2” (336 x 670 x 335 mm) |
| EQ | No | No |
| IP Rating | None | None |
| Inputs | XLR microphone, 6.3mm instrument, 3.5mm stereo, Bluetooth | - |
| Party Mode | No | Yes (Partychain up to 100 speakers) |
| Power Bank | Yes (USB-C, 5V/2A) | Yes (USB-A, 2.1A) |
| Power Input | AC Power cord | AC Power cord |
| Stereo | Yes | Yes |
| Omnidirectional | No | No |
| TWS | No | No |
| USB Playback | No | No |
| Weight | 32 lbs (14.5 kg) | 30.9 lbs (14 kg) |
| Amplifier Power | 250W | - |
| Drivers | 2x 40mm tweeters + 2x 50mm woofers + passive radiators | 12cm drivers + passive radiators |
| Maximum SPL | 115dB | - |
| Digital Aux Input | No | No |
| Configuration | Battery-powered active PA | - |
| Rigging | 35mm pole mount | - |
| DSP | No | - |
| Bluetooth | Yes | Yes |
| XLR Input | Yes | - |
| RCA Input | No | - |
| TRS Input | Yes | - |
| Optical Input | No | - |
| Coaxial Input | No | - |
| USB Input | No | - |
| HDMI Input | No | - |
| AES Input | No | - |
| Microphone Input | Yes | - |
| Guitar Input | Yes | - |
| Cabinet Material | Plastic and MDF | - |
| Frequency Response | 50Hz - 20kHz (Manufacturer specified) | - |
| Lights | - | Yes |
Related Speaker Comparisons
How Teufel Rockster Air compares with other leading options:
- Teufel Rockster Neo vs Teufel Rockster Air
- Teufel Rockster Air 2 vs Teufel Rockster Air
- Bose S1 Pro+ vs Teufel Rockster Air
- Mackie Thump Go vs Teufel Rockster Air
- Soundboks 4 vs Teufel Rockster Air
Prices on this page were last checked September 29, 2026 at 3:43 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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The Two Speakers In Full
Teufel Rockster Air: €500 Discontinued eBay
Newer model: the Teufel Rockster Air 2, ranked higher, rated 4.1/5.
Pros: Exceptional 58-hour battery (31 hours at full volume with ECO mode). User-replaceable battery adds real longevity. 112dB loud like live rock concert. Tight bass, solid build, clean full-range guitar output (legitimate practice amp). XLR mic/instrument/aux inputs with companion XLR daisy-chain. USB-A device charging. Party Link Stereo pairs two units wirelessly. Measured bass extension of ~52Hz (-10dB).
Cons: Peaky midrange, not very natural sounding. Starts to get distorted above half volume. Only available in Europe. Discontinued.
Full Teufel Rockster Air review and specifications →
| AES Input | No |
|---|---|
| Amplifier Power | 250W |
| App | No |
| Aux Input | Yes |
| Bass Extension (-10dB) | ~52Hz |
| Battery Life | 30 hours (Manufacturer specified) |
| Bluetooth | Yes |
| Bluetooth Codecs | aptX, SBC |
| Bluetooth Version | 4.0 |
| Cabinet Material | Plastic and MDF |
| Coaxial Input | No |
| Configuration | Battery-powered active PA |
| DSP | No |
| Digital Aux Input | No |
| Dimensions | 11.8” x 21.3” x 11” (300 x 540 x 280 mm) |
| Drivers | 2x 40mm tweeters + 2x 50mm woofers + passive radiators |
| EQ | No |
| Frequency Response | 50Hz - 20kHz (Manufacturer specified) |
| Guitar Input | Yes |
| HDMI Input | No |
| IP Rating | None |
| Inputs | XLR microphone, 6.3mm instrument, 3.5mm stereo, Bluetooth |
| Maximum SPL | 115dB |
| Microphone Input | Yes |
| Omnidirectional | No |
| Optical Input | No |
| Party Mode | No |
| Power Bank | Yes (USB-C, 5V/2A) |
| Power Input | AC Power cord |
| RCA Input | No |
| Rigging | 35mm pole mount |
| Stereo | Yes |
| TRS Input | Yes |
| TWS | No |
| USB Input | No |
| USB Playback | No |
| Weight | 32 lbs (14.5 kg) |
| XLR Input | Yes |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
- Teufel Rockster Air vs Soundboks 4
- Teufel Rockster Air vs Soundboks 2
- Teufel Rockster Air vs Mackie Thump Go
- Teufel Rockster Air vs Bose S1 Pro+
- Teufel Rockster Air vs JBL Eon One Compact
- Teufel Rockster Air vs Teufel Rockster Air 2
- Teufel Rockster Air vs Teufel Rockster Neo
- Teufel Rockster Air vs Diamondboxx L2
- See all 29 comparisons
Sony GTK-XB90: $429 Discontinued eBay
Pros: Deep punchy EXTRA BASS technology for party use. 3x 2.36” tweeters + 2x 7.09” woofers, built-in LED lights sync with beat. 16 hours battery claimed (9 hours real-world at moderate volume with lights). Built-in handle, portable one-box design. Fiestable plugin controls party settings and DJ effects. Three-device simultaneous Bluetooth pairing. Measured bass extension of ~50Hz (-10dB).
Cons: Bass is muddy and not deep, weird midrange peak, rolled off treble and overall strange tuning. Discontinued.
Full Sony GTK-XB90 review and specifications →
| App | No |
|---|---|
| Aux Input | Yes |
| Bass Extension (-10dB) | ~50Hz |
| Battery Life | 16 hours (Manufacturer specified) |
| Bluetooth | Yes |
| Bluetooth Codecs | SBC, AAC, LDAC |
| Digital Aux Input | No |
| Dimensions | 13.2” x 26.4” x 13.2” (336 x 670 x 335 mm) |
| Drivers | 12cm drivers + passive radiators |
| EQ | No |
| IP Rating | None |
| Lights | Yes |
| Omnidirectional | No |
| Party Mode | Yes (Partychain up to 100 speakers) |
| Power Bank | Yes (USB-A, 2.1A) |
| Power Input | AC Power cord |
| Stereo | Yes |
| TWS | No |
| USB Playback | No |
| Weight | 30.9 lbs (14 kg) |
- Reviews, Comparisons and Sound Samples
- No independent measurement review is linked for this model; it is ranked from hands-on listening and comparison against similarly priced speakers.
- Head-to-Head Comparisons