Short answer: the Stage 320. The GTK-XB90 is discontinued, and despite five drivers (2x 7.09-inch woofers, 3x 2.36-inch tweeters) and claimed Extra Bass punch, reviewer comparisons describe its actual tuning as muddy in the bass with a weird midrange peak and rolled-off treble.
The GTK-XB90’s case is driver count and codec support. It has more raw driver hardware than the Stage 320’s dual 6.5-inch woofers, supports AAC and LDAC alongside SBC, and its Fiestable app adds DJ-style party effects. Real-world battery life runs closer to 9 hours at moderate volume with lights on, well short of its 16-hour claim, and being discontinued it’s only available used or from remaining stock.
The Stage 320 is the more consistently reviewed choice. It keeps more bass at high volume than JBL’s own prior model and adds a removable battery, 5-band EQ and Auracast, none of which the XB90 has. Its own compromise is a slightly sibilant treble at full blast, a smaller complaint than the XB90’s muddy bass and midrange peak.
Buy the Stage 320 for the current, better-reviewed speaker with a removable battery and active support.
Buy the GTK-XB90 only if you find one used and specifically want its driver count or LDAC support over refined tuning.
Water resistance is not close: the JBL Partybox Stage 320 is rated at IPX4 (splashing), well ahead of the Sony GTK-XB90 at no water resistance.
Still deciding? The full Portable Bluetooth rankings cover every ranked option.
Specifications Side By Side
| JBL Partybox Stage 320 | Sony GTK-XB90 | |
|---|---|---|
| Price | $499.95 | $429 Discontinued |
| Ranked | #3 of 46 in Party Size Portable Bluetooth Speakers | #42 of 46 in Party Size Portable Bluetooth Speakers |
| App | Yes | No |
| Aux Input | Yes | Yes |
| Battery Life | 18 hours (Manufacturer specified) | 16 hours (Manufacturer specified) |
| Bluetooth | Yes | Yes |
| Bluetooth Codecs | SBC | SBC, AAC, LDAC |
| Bluetooth Version | 5.4 | - |
| Drivers | 2x 6.5” woofers, 2x 25mm tweeters | 12cm drivers + passive radiators |
| EQ | Yes (5 band) | No |
| Guitar Input | Yes | - |
| IP Rating | IPX4 | None |
| Microphone Input | Yes (Karaoke mode with echo effect) | - |
| Party Mode | Yes (Auracast) | Yes (Partychain up to 100 speakers) |
| Power Bank | Yes (USB-A, 5V/2.1A) | Yes (USB-A, 2.1A) |
| Power Input | AC Power cord | AC Power cord |
| Removable Battery | Yes | - |
| Stereo | Partially | Yes |
| Omnidirectional | No | No |
| TWS | Yes | No |
| USB Playback | Yes | No |
| Weight | 36.4 lbs (16.5 kg) | 30.9 lbs (14 kg) |
| Amplifier Power | 240W | - |
| Digital Aux Input | No | No |
| Lights | Yes | Yes |
| Wheels | Yes | - |
| Dimensions | 26.3”H x 13.2”W x 15.2”D (669 x 335 x 385 mm) | 13.2” x 26.4” x 13.2” (336 x 670 x 335 mm) |
| Strap | No | - |
| Bass Extension (-10dB) | - | ~50Hz |
Related Speaker Comparisons
How JBL Partybox Stage 320 compares with other leading options:
- Sony ULT Tower 7 vs JBL Partybox Stage 320
- JBL Partybox 330 vs JBL Partybox Stage 320
- JBL Partybox 310 vs JBL Partybox Stage 320
- Sony ULT Tower 5 vs JBL Partybox Stage 320
- JBL Partybox Club 120 vs JBL Partybox Stage 320
Prices on this page were last checked October 12, 2026 at 4:13 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.
As an eBay Partner, we may be compensated if you make a purchase.
The Two Speakers In Full
JBL Partybox Stage 320: $499.95 Amazon $499.95 eBay
Newer model: the JBL Partybox 330, ranked higher, rated 4.6/5, released Jun 2026.
Older models: the JBL Partybox 310 (ranked lower, rated 4.5/5) and the JBL Partybox 300 (ranked lower, rated 4.3/5). See every JBL PartyBox generation.
Same family: the JBL Partybox Club 120 (smaller model, ranked lower, rated 4.5/5) and the JBL Partybox Ultimate (larger model, rated 4.7/5).
Pros: Among the best-sounding party speakers in its size class, and it keeps more bass than the JBL Partybox 310 at high volume. Two 6.5-inch woofers and two tweeters run on 240W, with a removable battery rated for 18 hours, a 5-band app EQ, mic and guitar inputs and Auracast linking. A handle and wheels make the 16.5 kg cabinet easy to move, and the color lighting modes are customizable.
Cons: Slightly sibilant in the treble at full blast. Very large.
Full JBL Partybox Stage 320 review and specifications →
| Released | Apr 2024 (2 years ago) |
|---|---|
| Amplifier Power | 240W |
| App | Yes |
| Aux Input | Yes |
| Battery Life | 18 hours (Manufacturer specified) |
| Bluetooth | Yes |
| Bluetooth Codecs | SBC |
| Bluetooth Version | 5.4 |
| Digital Aux Input | No |
| Dimensions | 26.3”H x 13.2”W x 15.2”D (669 x 335 x 385 mm) |
| Drivers | 2x 6.5” woofers, 2x 25mm tweeters |
| EQ | Yes (5 band) |
| Guitar Input | Yes |
| IP Rating | IPX4 |
| Lights | Yes |
| Microphone Input | Yes (Karaoke mode with echo effect) |
| Omnidirectional | No |
| Party Mode | Yes (Auracast) |
| Power Bank | Yes (USB-A, 5V/2.1A) |
| Power Input | AC Power cord |
| Removable Battery | Yes |
| Stereo | Partially |
| Strap | No |
| TWS | Yes |
| USB Playback | Yes |
| Weight | 36.4 lbs (16.5 kg) |
| Wheels | Yes |
- Links
- Reviews, Comparisons and Sound Samples
- Oluv Patreon: JBL Partybox 320 vs 520 - indoor listening session More from Oluv’Sone →
- Oluv Patreon: JBL Partybox 320 vs 520 - outdoor test
- M1MTechChannel: soundcore Rave 3S mit 200W | LAUTER als die JBL Partybox 320 ? More from M1MTechChannel →
- M1MTechChannel: Welche JBL Partybox ist die BESTE ? Alle Partyboxen im Vergleich | 2026
- Jay’s Straight Up Reviews & More: JBL Partybox Stage 320 vs 310 🛜 Defcon 5🚨 Bass Alert! Take Shelter Immediately! 😲 Best Bass Goes To? More from JaysStraightUpReviews →
- Jay’s Straight Up Reviews & More: JBL Partybox Stage 320 vs 310 🥳 A Family Feud! Battery Powered🔋Bluetooth Party Speakers Face-Off🤬
- GYMCADDY: JBL PartyBox Stage 320 Review - Big Upgrades Everywhere, Worth The Upgrade More from GYMCADDY →
- Head-to-Head Comparisons
- JBL Partybox Stage 320 vs JBL Partybox 330
- JBL Partybox Stage 320 vs JBL Partybox 310
- JBL Partybox Stage 320 vs Sony ULT Tower 5
- JBL Partybox Stage 320 vs Sony ULT Tower 7
- JBL Partybox Stage 320 vs JBL Partybox Club 120
- JBL Partybox Stage 320 vs JBL Partybox 130
- JBL Partybox Stage 320 vs JBL Partybox 100
- JBL Partybox Stage 320 vs JBL Partybox 110
- See all 83 comparisons
Sony GTK-XB90: $429 Discontinued eBay
Newer model: the Sony SRS-XP700, ranked higher, rated 4/5, released Apr 2021 (also discontinued). See every Sony GTK, XP and XV generation.
Same family: the Sony GTK-XB60 (smaller model, ranked lower, rated 2.1/5).
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 →
| Released | Sep 2017 (9 years ago) |
|---|---|
| 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