These sit in different size classes, so this is not a straight ranking comparison. The Onn Medium Party Speaker Gen 2 ranks #65 of 113 boombox speakers by sound quality at $90; the W-King T9 Pro ranks #38 of 53 party speakers by sound quality at $171.49.
The Onn Medium Party Speaker Gen 2 is the longer-running, lighter pick. An affordable waterproof party speaker with a big woofer, lights, a karaoke mic input and FM radio. It is rated for 20 hours of battery against 12 for the W-King T9 Pro. At 11 lbs (5 kg) it weighs much less than the W-King T9 Pro at 20 lbs (9.05 kg). It is rated IPX7, while the W-King T9 Pro has no water resistance. Watch for: Lacking detail compared to the Onn Large Party gen 2 and not as deep of bass.
The case for the W-King T9 Pro: A rolling party speaker with dual woofers, a removable battery for long events, stereo pairing, and music synced lights. It plays in stereo from a single unit, unlike the Onn Medium Party Speaker Gen 2. The catch: Reviewer comparisons describe the tuning as warm and gritty rather than clean or detailed.
Buy the Onn Medium Party Speaker Gen 2 at $90 for a boombox speaker, or the W-King T9 Pro at $171.49 for a party speaker instead.
Still deciding? The full Portable Bluetooth rankings cover every ranked option.
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
| Onn Medium Party Speaker Gen 2 | W-King T9 Pro | |
|---|---|---|
| Price | $90 | $171.49 |
| Ranked | #65 of 113 in Boombox Size Portable Bluetooth Speakers | #38 of 53 in Party Size Portable Bluetooth Speakers |
| Aux Input | Yes | Yes |
| Battery Life | 20 hours (Manufacturer specified) | 12 hours (Manufacturer specified) |
| FM Tuner | Yes (16 presets) | - |
| IP Rating | IPX7 | None |
| Microphone Input | Yes (Karaoke mode with echo effect) | - |
| Party Mode | Yes (Party Sync Mode) | No |
| Power Bank | Yes (USB-A, 5V/2.1A) | No |
| Power Input | AC Power cord | USB-C |
| Stereo | No | Yes |
| Omnidirectional | No | No |
| Bluetooth | Yes | Yes |
| Bluetooth Codecs | SBC | SBC |
| App | No | No |
| EQ | No | No |
| TWS | Yes | No |
| USB Playback | No | Yes |
| Built-in Microphone | No | - |
| Amplifier Power | 50W RMS / 200W peak | 250W (peak) |
| Dimensions | 9.6” x 10.9” x 15.1” (244.1 x 277.9 x 383 mm) | 10.8” x 10.1” x 21.1” (274 x 255.7 x 535.5 mm) |
| Weight | 11 lbs (5 kg) | 20 lbs (9.05 kg) |
| Drivers | 8” (203mm) woofer + tweeters | 2x 6.5” woofers, 2x 2.5” tweeters |
| Digital Aux Input | No | No |
| Lights | Yes | Yes |
| Bluetooth Version | - | 5.3 |
| Charging Time | - | 4 hours |
| Frequency Response | - | 50Hz - 20kHz (Manufacturer specified) |
| Wheels | - | Yes |
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