Short answer: the Tozo PA1. It ranks #57 of 150 medium speakers by sound quality, rated 3.5/5, at $39.99; the Ultimate Ears Boom 4 ranks #99, rated 2.9/5, and costs $109.99, so there is little reason to consider the other one.
Why pick the Tozo PA1: Tozo PA1 uses 67mm fullrange. Watch for: Bass is limited by its 52Hz specification.
The case for the Ultimate Ears Boom 4: IP67 rated, floats, and finally charges via USB-C instead of the older Booms’ Micro-USB. The tradeoff: Not much improvement over the old ones.
Buy the Tozo PA1. It is rated higher for sound quality than the Ultimate Ears Boom 4 and costs less, so only choose the other one for a particular feature it does better.
Want more options? Browse the full Portable Bluetooth rankings.
Specifications Side By Side
| Tozo PA1 | Ultimate Ears Boom 4 | |
|---|---|---|
| Price | $39.99 | $109.99 |
| Ranked | #57 of 150 in Medium Size Portable Bluetooth Speakers | #99 of 150 in Medium Size Portable Bluetooth Speakers |
| Bass Extension (-10dB) | 52Hz | - |
| Battery Life | 25 hours (Manufacturer specified) | 15 hours (Manufacturer specified) |
| Bluetooth Latency | 220ms | - |
| Maximum SPL | 98dB (measured by Alan Ross Reviews) | 85dBC (Manufacturer specified) |
| Stereo | No | Yes |
| Omnidirectional | No | No |
| Weight | 1.3 lbs (581 g) | 1.4 lbs (620 g) |
| Bluetooth | Yes | Yes |
| Bluetooth Version | 5.0 | 5.1 |
| Drivers | 67mm fullrange | 2x 1.57” (40mm) active drivers + 2x 1.81” x 2.57” (46.1 x 65.2mm) passive radiators |
| Dimensions | 8.3” x 3.6” x 2.4” (210 x 91 x 61 mm) | 7.2” x 2.9” x 2.9” (184 x 73 x 73 mm) |
| Frequency Response | 55Hz - 18kHz (Manufacturer specified) | - |
| Amplifier Power | 20W | - |
| IP Rating | IPX6 | IP67 |
| Digital Aux Input | No | No |
| Bluetooth Codecs | SBC, AAC | SBC |
| App | Yes | Yes |
| Aux Input | No | No |
| EQ | Yes | Yes (via app) |
| TWS | Yes | Yes |
| Power Input | USB-C | USB-C |
| Strap | Yes (lanyard) | Yes (built-in loop) |
| Built-in Microphone | - | No |
| Power Bank | - | No |
Related Speaker Comparisons
How Tozo PA1 compares with other leading options:
- Earfun Uboom L vs Tozo PA1
- Soundcore Motion 300 vs Tozo PA1
- JBL Charge 6 vs Tozo PA1
- JBL Flip 6 vs Tozo PA1
- JBL Flip 7 vs Tozo PA1
Prices on this page were last checked September 30, 2026 at 2:57 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
Tozo PA1: $39.99 Amazon eBay
Pros: Tozo PA1 uses 67mm fullrange. Its 581 g, claimed 25 hours (Manufacturer specified) battery life, IPX6 protection, up to 98dB and mono playback make it a practical option for its intended room or portable use. Measured bass extension of 52Hz (-10dB).
Cons: Bass is limited by its 52Hz specification. There is no companion app. No EQ adjustment.
Full Tozo PA1 review and specifications →
| Amplifier Power | 20W |
|---|---|
| App | Yes |
| Aux Input | No |
| Bass Extension (-10dB) | 52Hz |
| Battery Life | 25 hours (Manufacturer specified) |
| Bluetooth | Yes |
| Bluetooth Codecs | SBC, AAC |
| Bluetooth Latency | 220ms |
| Bluetooth Version | 5.0 |
| Digital Aux Input | No |
| Dimensions | 8.3” x 3.6” x 2.4” (210 x 91 x 61 mm) |
| Drivers | 67mm fullrange |
| EQ | Yes |
| Frequency Response | 55Hz - 18kHz (Manufacturer specified) |
| IP Rating | IPX6 |
| Maximum SPL | 98dB (measured by Alan Ross Reviews) |
| Omnidirectional | No |
| Power Input | USB-C |
| Stereo | No |
| Strap | Yes (lanyard) |
| TWS | Yes |
| Weight | 1.3 lbs (581 g) |
- Links
- Reviews, Comparisons and Sound Samples
- Alan Ross Reviews: 1 million views! Best Budget Tws? Tozo Pa1 Review and sound test More from alanrossreviews →
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- Jay’s Straight Up Reviews & More: On A Ledge 🪟 Soundcore Motion 300 vs Tozo PA1 ⚒ Battle of the Budget Handheld Bluetooth Speakers More from JaysStraightUpReviews →
- Jay’s Straight Up Reviews & More: Newly Released! Skullcandy Terrain XL 🦨 Quick Overview & Sound Comparison with JBL Flip 6 & Tozo PA1
- Head-to-Head Comparisons
Ultimate Ears Boom 4: $109.99 Amazon eBay
Older model: the Ultimate Ears Boom 3 (ranked lower, rated 2.9/5).
Pros: IP67 rated, floats, and finally charges via USB-C instead of the older Booms’ Micro-USB. 15 hour battery. Customizable EQ and speaker-pairing via the UE app.
Cons: Not much improvement over the old ones. Weak bass extension and thuddy bass. Gets distorted above 90%
Full Ultimate Ears Boom 4 review and specifications →
| App | Yes |
|---|---|
| Aux Input | No |
| Battery Life | 15 hours (Manufacturer specified) |
| Bluetooth | Yes |
| Bluetooth Codecs | SBC |
| Bluetooth Version | 5.1 |
| Built-in Microphone | No |
| Digital Aux Input | No |
| Dimensions | 7.2” x 2.9” x 2.9” (184 x 73 x 73 mm) |
| Drivers | 2x 1.57” (40mm) active drivers + 2x 1.81” x 2.57” (46.1 x 65.2mm) passive radiators |
| EQ | Yes (via app) |
| IP Rating | IP67 |
| Maximum SPL | 85dBC (Manufacturer specified) |
| Omnidirectional | No |
| Power Bank | No |
| Power Input | USB-C |
| Stereo | Yes |
| Strap | Yes (built-in loop) |
| TWS | Yes |
| Weight | 1.4 lbs (620 g) |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
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