Short answer: the JBL 306P MKII if sound quality matters most, the Adam Audio T8V if price matters most. The JBL 306P MKII ranks #40 of 67 powered bookshelf speakers at $398. The Adam Audio T8V ranks #53 at $349.99, $48.01 cheaper.
What the Adam Audio T8V gets right: Quite balanced and neutral, very close to the Yamaha HS8. The catch: A crossover-region notch around 4.6kHz where tweeter and woofer interact, and a hole in the vertical response below the tweeter axis - keep the tweeter at or above ear height.
On the JBL 306P MKII side: CEA2034 spinorama shows a nice, smooth on-axis response with very good directivity control for a compact 6.5” monitor. Set against that: A narrow but noticeable dip around 1.6kHz shows up in the on-axis and listening-window curves.
Buy the Adam Audio T8V if the price matters more than sound quality. Buy the JBL 306P MKII if sound quality matters more than the price.
If sound quality matters at all to you, skip the Adam Audio T8V. It ranks near the bottom of the 67 powered bookshelf speakers, so look higher up the list instead.
Specifications Side By Side
| Adam Audio T8V | JBL 306P MKII | |
|---|---|---|
| Price | $349.99 | $398 |
| Ranked | #53 of 67 in Large Size Powered Bookshelf Speakers | #40 of 67 in Large Size Powered Bookshelf Speakers |
| Bass Extension (-3dB) | 45Hz (measured, Audio Science Review) | 78Hz (measured, Audio Science Review) |
| Bass Extension (-10dB) | 35Hz (measured, Audio Science Review) | 60Hz (measured, Audio Science Review) |
| Dimensions | 15.8"H x 9.8"W x 13.2"D (401.3 x 248.9 x 335.3 mm) | 16.1"H x 11.2"W x 12.9"D (408 x 285 x 328 mm) |
| Frequency Response | 33Hz - 25kHz (-6dB) (Manufacturer specified) | 39Hz - 24kHz (-10dB) (Manufacturer specified) |
| Inputs | XLR, RCA | - |
| Weight | 21.6 lbs / 9.8 kg | 13.4 lbs / 6.1 kg each |
| Drivers | 8" (203mm) woofer | 6.5" woofer, 1" neodymium tweeter |
| App | No | No |
| Bluetooth | No | - |
| EQ | Yes (Room adjustment) | No |
| DSP | No | No |
| Output Power | 90w Per Speaker | 112W total |
Related Speaker Comparisons
How JBL 306P MKII compares with other leading options:
- Genelec 8361A vs JBL 306P MKII
- JBL 306P MKII vs Genelec 8341A
- JBL 306P MKII vs Adam Audio S2V
- Neumann KH 310 A vs JBL 306P MKII
- JBL 308P MKII vs JBL 306P MKII
Prices on this page were last checked September 9, 2026 at 6:54 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
Adam Audio T8V: $349.99 Amazon eBay
Pros: Measured -3dB extension of 39.6Hz gives useful bass depth for an affordable large monitor. Analog inputs and basic shelf controls offer uncomplicated studio integration.
Cons: The 5.42 ideal-subwoofer score and 3.0dB response span from 300Hz to 5kHz show less even tonal balance than stronger budget alternatives. Treble emphasis and crossover-region vertical cancellation make listening height important. Deep bass and an AMT tweeter do not by themselves imply accurate sound.
Full Adam Audio T8V review and specifications →
| App | No |
|---|---|
| Bass Extension (-10dB) | 35Hz (measured, Audio Science Review) |
| Bass Extension (-3dB) | 45Hz (measured, Audio Science Review) |
| Bluetooth | No |
| DSP | No |
| Dimensions | 15.8"H x 9.8"W x 13.2"D (401.3 x 248.9 x 335.3 mm) |
| Drivers | 8" (203mm) woofer |
| EQ | Yes (Room adjustment) |
| Frequency Response | 33Hz - 25kHz (-6dB) (Manufacturer specified) |
| Inputs | XLR, RCA |
| Output Power | 90w Per Speaker |
| Weight | 21.6 lbs / 9.8 kg |
- Links
- Reviews, Comparisons and Sound Samples
- Audio Science Review Measurements More from Audio Science Review →
- Sercan Solmaz: Adam Audio T8V vs Yamaha HS8 vs KRK Rokit 8 (STUDIO SPEAKER SOUND TEST)
- DSAUDIO.review: Adam Audio T8V vs KRK Rokit 8 G4 Sound & Frequency Response Comparison More from DSAUDIOreview →
- Audio Science Review Measurements (spinorama.org)
- Head-to-Head Comparisons
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- Adam Audio T8V vs Kali Audio LP-8
- Adam Audio T8V vs KRK Rokit 8 G4
- Adam Audio T8V vs Focal Alpha 65 EVO
- Adam Audio T8V vs KRK Rokit 7 G4
- Adam Audio T8V vs Emotiva Airmotiv 6s
- Adam Audio T8V vs Presonus Eris Studio 8
- Adam Audio T8V vs Edifier S3000Pro
- See all 41 comparisons
JBL 306P MKII: $398 B&H Photo Video eBay
Pros: A 6.02 ideal-subwoofer score and 46.9Hz measured -3dB extension make this a useful affordable nearfield monitor. The waveguide supports broad horizontal listening coverage, and basic boundary controls help with setup.
Cons: The 3.4dB response span from 300Hz to 5kHz is less even than the 308P MKII’s, with midrange resonances affecting neutrality. Hiss can matter at a quiet desk, while bass distortion limits demanding playback. A subwoofer improves bandwidth but does not remove the midrange irregularities.
Full JBL 306P MKII review and specifications →
| App | No |
|---|---|
| Bass Extension (-10dB) | 60Hz (measured, Audio Science Review) |
| Bass Extension (-3dB) | 78Hz (measured, Audio Science Review) |
| DSP | No |
| Dimensions | 16.1"H x 11.2"W x 12.9"D (408 x 285 x 328 mm) |
| Drivers | 6.5" woofer, 1" neodymium tweeter |
| EQ | No |
| Frequency Response | 39Hz - 24kHz (-10dB) (Manufacturer specified) |
| Output Power | 112W total |
| Weight | 13.4 lbs / 6.1 kg each |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons