Short answer: the Audiocase S5. It ranks #25 of 43 party speakers by sound quality, rated 3.5/5, at $645. The Sony GTK-XB90 ranks #39, rated 2.3/5, at $429, $216 cheaper, not enough of a saving to outweigh the sound-quality gap.
What the Audiocase S5 does well: Audiocase S5 uses 2x 5” woofers, 1” tweeter. The catch: There is no companion app.
Why pick the Sony GTK-XB90: 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 Audiocase S5 is discontinued and no longer widely available new.
Buy the Audiocase S5. It is rated higher for sound quality, and saving $216 with the Sony GTK-XB90 does not make up for the sound-quality gap.
There is a real battery-life gap here: the Audiocase S5 is rated for 30 hours, the Sony GTK-XB90 only 16 hours.
Want more options? Browse the full Portable Bluetooth rankings.
Specifications Side By Side
| Audiocase S5 | Sony GTK-XB90 | |
|---|---|---|
| Price | $645 Discontinued | $429 Discontinued |
| Ranked | #25 of 43 in Party Size Portable Bluetooth Speakers | #39 of 43 in Party Size Portable Bluetooth Speakers |
| App | No | No |
| Aux Input | Yes | Yes |
| Battery Life | 30 hours (Manufacturer specified) | 16 hours (Manufacturer specified) |
| Bluetooth | Yes | Yes |
| Bluetooth Codecs | aptX, SBC | SBC, AAC, LDAC |
| Bluetooth Version | 5.0 | - |
| Dimensions | 16.1” x 9.8” x 7.5” (410 x 250 x 190 mm) | 13.2” x 26.4” x 13.2” (336 x 670 x 335 mm) |
| Drivers | 2x 5” woofers, 1” tweeter | 12cm drivers + passive radiators |
| EQ | No | No |
| Guitar Input | Yes | - |
| IP Rating | None | None |
| Microphone Input | Yes (Karaoke mode with reverb effect) | - |
| Party Mode | Yes (wired link) | Yes (Partychain up to 100 speakers) |
| Power Bank | No | Yes (USB-A, 2.1A) |
| Power Input | AC Power brick | AC Power cord |
| Removable Battery | Yes | - |
| Stereo | Yes | Yes |
| Omnidirectional | No | No |
| TWS | No | No |
| USB Playback | No | No |
| Weight | 17.4 lbs (7.9 kg) | 30.9 lbs (14 kg) |
| Amplifier Power | 2 x 73W | - |
| Maximum SPL | 108dB (Manufacturer specified) | - |
| Digital Aux Input | No | No |
| Bass Extension (-10dB) | - | ~50Hz |
| Lights | - | Yes |
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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
Audiocase S5: $645 Discontinued eBay
Pros: Audiocase S5 uses 2x 5” woofers, 1” tweeter. Its 7.9 kg, claimed 30 hours (Manufacturer specified) battery life, aux input, up to 108dB and stereo playback make it a practical option for its intended room or portable use. The battery is removable.
Cons: There is no companion app. No EQ adjustment. Discontinued.
Full Audiocase S5 review and specifications →
| Amplifier Power | 2 x 73W |
|---|---|
| App | No |
| Aux Input | Yes |
| Battery Life | 30 hours (Manufacturer specified) |
| Bluetooth | Yes |
| Bluetooth Codecs | aptX, SBC |
| Bluetooth Version | 5.0 |
| Digital Aux Input | No |
| Dimensions | 16.1” x 9.8” x 7.5” (410 x 250 x 190 mm) |
| Drivers | 2x 5” woofers, 1” tweeter |
| EQ | No |
| Guitar Input | Yes |
| IP Rating | None |
| Maximum SPL | 108dB (Manufacturer specified) |
| Microphone Input | Yes (Karaoke mode with reverb effect) |
| Omnidirectional | No |
| Party Mode | Yes (wired link) |
| Power Bank | No |
| Power Input | AC Power brick |
| Removable Battery | Yes |
| Stereo | Yes |
| TWS | No |
| USB Playback | No |
| Weight | 17.4 lbs (7.9 kg) |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head 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