Short answer: the JBL Partybox 300 on sound quality. Its highs and midranges are crisp and crystal clear with hard, punchy bass and no muddiness, while the Electrotec Stage One is built around a gigantic dual swappable battery and, per the page, more loudness than deeper bass. The Partybox 300’s cost is ergonomics: it is hard to carry, too tall, and drags on the ground.
Worth knowing: the JBL Partybox 300 is discontinued, though it still ranks #10 of 53 party speakers by sound quality, so a used unit beats most of what is still sold new. The JBL Partybox 300’s replacement, the JBL Partybox 330, is still sold new.
Buy the Electrotec Stage One at $1,450 if you want a battery-powered PA speaker. Buy the JBL Partybox 300 at $300 if you want a party speaker instead.
Battery life favors the Electrotec Stage One: rated for 100 hours against 18 hours for the JBL Partybox 300.
If water resistance matters to you, the Electrotec Stage One at IPX6 (powerful water jets) holds up far better than the JBL Partybox 300 at no water resistance.
Looking for alternatives? See the complete PA & Live Sound rankings and Portable Bluetooth rankings.
Prices on this page were last checked November 7, 2026 at 7:34 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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Specifications Side By Side
| Electrotec Stage One | JBL Partybox 300 | |
|---|---|---|
| Price | $1450 | $300 Discontinued |
| Ranked | #2 of 17 in Battery-Powered PA Speakers | #10 of 53 in Party Size Portable Bluetooth Speakers |
| Passive | No | - |
| App | Yes | No |
| Aux Input | Yes | Yes |
| Outputs | Aux, XLR | - |
| Bass Extension (-10dB) | 48Hz | 40Hz |
| Battery Life | 100 hours (Manufacturer specified) | 18 hours (Manufacturer specified) |
| EQ | Yes | No |
| IP Rating | IPX6 | None |
| Inputs | 2x XLR/6.3mm combo (mic/line), 3.5mm stereo, USB-C audio, USB media player, Bluetooth | - |
| Microphone Input | Yes | Yes (Karaoke mode with echo effect) |
| Party Mode | Yes (SKAA) | No |
| Power Bank | Yes (USB-A + USB-C) | Yes (USB-A) |
| Power Input | AC Power cord | AC Power cord |
| Removable Battery | Yes (dual) | - |
| SKAA | Yes | - |
| SKAA Latency | 19ms | - |
| Stereo | No | Yes (lying down) |
| Omnidirectional | No | No |
| TWS | Yes | Yes |
| USB Playback | Yes | Yes |
| Weight | 39.9 lbs (18.1 kg) | 35.3 lbs (16 kg) |
| XLR Input | Yes | - |
| Bluetooth Codecs | SBC | SBC |
| Drivers | Dual 1.5” compression drivers (tweeters) + 2x 4” woofers + passive radiators (PA system configuration) | 2x 6.5” (165mm) woofers + 3x 2.25” (57mm) tweeters |
| Digital Aux Input | No | No |
| Configuration | Battery-powered active PA | - |
| Amplifier Power | 400W | 120W |
| DSP | App-controlled EQ | - |
| Bluetooth | Yes | Yes |
| Guitar Input | Yes | Yes |
| Cabinet Material | Phenolic and vinyl coated birch plywood | - |
| Rigging | Pole mount | - |
| Maximum SPL | 128dB max output (Manufacturer specified) | - |
| Bluetooth Version | - | 4.2 |
| Dimensions | - | 27” x 13” x 12.7” (685.8 x 330.2 x 322.6 mm) |
| Frequency Response | - | 45Hz - 20kHz (Manufacturer specified) |
| Lights | - | Yes |
| Strap | - | No |
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