Short answer: the Teufel Rockster Air. It ranks #27 of 50 party speakers by sound quality; the Sony GTK-XB90 ranks #46.
What the Teufel Rockster Air offers: Exceptional 58-hour battery (31 hours at full volume with ECO mode). Watch for: Peaky midrange, not very natural sounding.
What the Sony GTK-XB90 offers: 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
Buy the Teufel Rockster Air if sound quality matters more than the price. Buy the Sony GTK-XB90 if the price matters more than sound quality.
If sound quality matters at all to you, skip the Sony GTK-XB90. It ranks near the bottom of the 50 party speakers, so look higher up the list instead.
If battery life is a priority, the Teufel Rockster Air is rated for 30 hours versus 16 hours for the Sony GTK-XB90.
Specifications Side By Side
| Teufel Rockster Air | Sony GTK-XB90 | |
|---|---|---|
| Price | €500 Discontinued | $429 Discontinued |
| Ranked | #27 of 50 in Party Size Portable Bluetooth Speakers | #46 of 50 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) | - |
| EQ | No | No |
| IP Rating | None | None |
| 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 |
| TWS | No | No |
| USB Playback | No | No |
| Weight | 32 lbs / 14.5 kg | 30.9 lbs / 14 kg |
| Output Power | 250W | - |
| Drivers | 2x 40mm tweeters + 2x 50mm woofers + passive radiators | 12cm drivers + passive radiators |
| Discontinued | Yes | Yes |
| Max Volume | 115dB | - |
| Digital Aux Input | No | No |
Related Speaker Comparisons
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- Bose S1 Pro vs Sony GTK-XB72
- Panasonic SC-TMAX10 vs Sony GTK-XB72
- Mackie Thump Go vs Audiocase S5
- Audiocase S5 vs Sony GTK-XB90
- Teufel Rockster Air vs Soundboks 2
The Two Speakers In Full
Teufel Rockster Air: €500 Discontinued
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.
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 →
| App | No |
|---|---|
| Aux Input | Yes |
| Bass Extension (-10dB) | ~52Hz |
| Battery Life | 30 hours (Manufacturer specified) |
| Bluetooth Codecs | aptX, SBC |
| Bluetooth Version | 4.0 |
| Digital Aux Input | No |
| Dimensions | 11.8" x 21.3" x 11" (300 x 540 x 280 mm) |
| Discontinued | Yes |
| Drivers | 2x 40mm tweeters + 2x 50mm woofers + passive radiators |
| EQ | No |
| IP Rating | None |
| Max Volume | 115dB |
| Output Power | 250W |
| Party Mode | No |
| Power Bank | Yes (USB-C, 5V/2A) |
| Power Input | AC Power cord |
| Stereo | Yes |
| TWS | No |
| USB Playback | No |
| Weight | 32 lbs / 14.5 kg |
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Sony GTK-XB90: $429 Discontinued
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.
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 Codecs | SBC, AAC, LDAC |
| Digital Aux Input | No |
| Discontinued | Yes |
| Drivers | 12cm drivers + passive radiators |
| EQ | No |
| IP Rating | None |
| 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 |
As an eBay Partner, we may be compensated if you make a purchase.
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons