Short answer: the Vanatoo Transparent Zero Plus for better sound quality, the JBL One Series 104 for the lower price. The Vanatoo Transparent Zero Plus ranks #14 of 60 powered bookshelf speakers at $499.99. The JBL One Series 104 ranks #58 at $129, $370.99 cheaper.
What the Vanatoo Transparent Zero Plus offers: Genuinely neutral tonal balance in a small desktop-class powered speaker - a rarity in this size and price range, where the reviewer says most competitors have a scooped mid-range, one-note bass, and piercing V-shaped highs. Flexible mounting: flip the cabinet orientation to angle the tweeter up for flat-desktop placement or level for stand-mount ear height. Subwoofer output with auto-sense, so it engages automatically when a sub is connected. Wide input selection - Bluetooth aptX HD, USB (24-bit/96kHz), Toslink, and 3.5mm analog. Distortion stays reasonable (below 3%) up to about 88dB, and multitone distortion at max output (96dB) is the only real weak point. Watch for: An 8th-order Butterworth high-pass at 58Hz sharply limits bass below that point - F3 measures 92Hz and F10 53Hz, so kick drum fundamentals and true low end need a subwoofer. Very sensitive to ear height relative to the tweeter: sitting even slightly above the tweeter axis scoops out the 2-4kHz upper mid-range. Multitone distortion at maximum output (96dB) is high enough to add noticeable vocal graininess - stick closer to 88dB for clean output. The reviewer’s only real gripe is wishing it extended lower, which he acknowledges is an unreasonable ask for a speaker this size.
What the JBL One Series 104 offers: Heavy internal EQ from the amplifier meaningfully compensates for otherwise poor raw driver measurements, and casual listening on undemanding content sounded like a scaled-down JBL 305P Mark II - well above typical computer-speaker quality for the price. Solid build quality for a $90-130 powered pair with dual built-in amplifiers. Watch for: Measuring the passive drivers alone (bypassing the amplifier’s EQ) showed “no bass, no low mids, and highly irregular highs” - a disaster by the reviewer’s description. Even with the amplifier’s correction applied, there’s an on-axis cancellation around 7.4kHz from the coaxial driver design, and JBL’s own published frequency-response graph uses a compressed 95dB vertical scale that hides real deviations the reviewer’s 50dB-scale CEA-2034 measurement reveals. Female vocals and “lisping” content became bright and annoying; the reviewer’s verdict was “can’t recommend it though if you want a true hi-fi experience.”
Buy the Vanatoo Transparent Zero Plus if sound quality matters more than the price. Buy the JBL One Series 104 if the price matters more than sound quality.
If sound quality matters at all to you, skip the JBL One Series 104. It ranks near the bottom of the 60 powered bookshelf speakers, so look higher up the list instead.
Specifications Side By Side
| Vanatoo Transparent Zero Plus | JBL One Series 104 | |
|---|---|---|
| Price | $499.99 | $129 |
| Ranked | #14 of 60 in Medium Size Powered Bookshelf Speakers | #58 of 60 in Medium Size Powered Bookshelf Speakers |
| Drivers | 4" aluminum cone woofer, 4" long-throw passive radiator, 1" soft dome tweeter | 4.5" coaxial low-frequency driver, 0.75" soft dome tweeter |
| Output Power | 120W total (Class D) | 60W total Class D (30W per speaker) |
| Inputs | Bluetooth (aptX HD), USB (24-bit/96kHz), Toslink Optical (24-bit/96kHz), 3.5mm Analog | - |
| Dimensions | 8.5"H x 5.5"W x 6"D | 9.7H x 6W x 4.9D in (per manufacturer, 104-BT) |
| Weight | 7 lbs each | 4.5 lbs / 2.06 kg (master), 3.8 lbs / 1.73 kg (slave) |
| Bass Extension (-3dB) | 92Hz (measured, Erin’s Audio Corner) | 45Hz with the amplifier’s DSP bass boost active (measured, Audio Science Review) |
| Bass Extension (-10dB) | 53Hz (measured, Erin’s Audio Corner) | 35Hz with the amplifier’s DSP bass boost active (measured, Audio Science Review) |
| Sensitivity | 88.5dB (measured at 0.3V/1m, Erin’s Audio Corner) | - |
| DSP | Yes (8th-order Butterworth high-pass at 58Hz) | Yes |
| Frequency Response | - | 60Hz - 20kHz (Manufacturer specified) |
| App | - | No |
| EQ | - | Yes (fixed, amplifier-applied) |
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Prices on this page were last checked August 24, 2026 at 6:53 AM 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
Vanatoo Transparent Zero Plus: $499.99 Amazon eBay
Pros: Genuinely neutral tonal balance in a small desktop-class powered speaker - a rarity in this size and price range, where the reviewer says most competitors have a scooped mid-range, one-note bass, and piercing V-shaped highs. Flexible mounting: flip the cabinet orientation to angle the tweeter up for flat-desktop placement or level for stand-mount ear height. Subwoofer output with auto-sense, so it engages automatically when a sub is connected. Wide input selection - Bluetooth aptX HD, USB (24-bit/96kHz), Toslink, and 3.5mm analog. Distortion stays reasonable (below 3%) up to about 88dB, and multitone distortion at max output (96dB) is the only real weak point.
Cons: An 8th-order Butterworth high-pass at 58Hz sharply limits bass below that point - F3 measures 92Hz and F10 53Hz, so kick drum fundamentals and true low end need a subwoofer. Very sensitive to ear height relative to the tweeter: sitting even slightly above the tweeter axis scoops out the 2-4kHz upper mid-range. Multitone distortion at maximum output (96dB) is high enough to add noticeable vocal graininess - stick closer to 88dB for clean output. The reviewer’s only real gripe is wishing it extended lower, which he acknowledges is an unreasonable ask for a speaker this size.
Full Vanatoo Transparent Zero Plus review and specifications →
| Bass Extension (-10dB) | 53Hz (measured, Erin's Audio Corner) |
|---|---|
| Bass Extension (-3dB) | 92Hz (measured, Erin's Audio Corner) |
| DSP | Yes (8th-order Butterworth high-pass at 58Hz) |
| Dimensions | 8.5"H x 5.5"W x 6"D |
| Drivers | 4" aluminum cone woofer, 4" long-throw passive radiator, 1" soft dome tweeter |
| Inputs | Bluetooth (aptX HD), USB (24-bit/96kHz), Toslink Optical (24-bit/96kHz), 3.5mm Analog |
| Output Power | 120W total (Class D) |
| Sensitivity | 88.5dB (measured at 0.3V/1m, Erin's Audio Corner) |
| Weight | 7 lbs each |
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JBL One Series 104: $129 Amazon eBay
Pros: Heavy internal EQ from the amplifier meaningfully compensates for otherwise poor raw driver measurements, and casual listening on undemanding content sounded like a scaled-down JBL 305P Mark II - well above typical computer-speaker quality for the price. Solid build quality for a $90-130 powered pair with dual built-in amplifiers.
Cons: Measuring the passive drivers alone (bypassing the amplifier’s EQ) showed “no bass, no low mids, and highly irregular highs” - a disaster by the reviewer’s description. Even with the amplifier’s correction applied, there’s an on-axis cancellation around 7.4kHz from the coaxial driver design, and JBL’s own published frequency-response graph uses a compressed 95dB vertical scale that hides real deviations the reviewer’s 50dB-scale CEA-2034 measurement reveals. Female vocals and “lisping” content became bright and annoying; the reviewer’s verdict was “can’t recommend it though if you want a true hi-fi experience.”
Full JBL One Series 104 review and specifications →
| App | No |
|---|---|
| Bass Extension (-10dB) | 35Hz with the amplifier's DSP bass boost active (measured, Audio Science Review) |
| Bass Extension (-3dB) | 45Hz with the amplifier's DSP bass boost active (measured, Audio Science Review) |
| DSP | Yes |
| Dimensions | 9.7H x 6W x 4.9D in (per manufacturer, 104-BT) |
| Drivers | 4.5" coaxial low-frequency driver, 0.75" soft dome tweeter |
| EQ | Yes (fixed, amplifier-applied) |
| Frequency Response | 60Hz - 20kHz (Manufacturer specified) |
| Output Power | 60W total Class D (30W per speaker) |
| Weight | 4.5 lbs / 2.06 kg (master), 3.8 lbs / 1.73 kg (slave) |
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