Short answer: the JBL 306P MKII on value, though both have flaws near the crossover. The 306P MKII costs $321.98 less and its spinorama shows a smooth on-axis response with very good directivity for a compact 6.5” monitor, but a narrow but noticeable dip around 1.6kHz shows up on-axis. The T8V is balanced and neutral, very close to the Yamaha HS8, but has a crossover-region notch around 4.6kHz and a vertical hole below the tweeter axis.
Buy the JBL 306P MKII. It is rated higher for sound quality than the Adam Audio T8V and costs less, so only choose the other one for a particular feature it does better.
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Specifications Side By Side
| Adam Audio T8V | JBL 306P MKII | |
|---|---|---|
| Price | $719.98 per pair | $398 per pair |
| Ranked | #54 of 68 in Large Size Powered Bookshelf Speakers | #41 of 68 in Large Size Powered Bookshelf Speakers |
| Bass Extension (-3dB) | 39.6Hz (measured, Audio Science Review) | 46.9Hz (measured, Audio Science Review) |
| Bass Extension (-10dB) | 33.2Hz (derived, log-interpolated between spinorama.org -9dB/-12dB points) | 38.6Hz (derived, log-interpolated between spinorama.org -9dB/-12dB points) |
| 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 | XLR, 1/4” TRS |
| 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 | No |
| EQ | Yes (Room adjustment) | No |
| DSP | No | No |
| Amplifier Power | 90w Per Speaker | 112W total |
| Spinorama Preference Score | 4.65 | 5.06 |
| Spinorama Preference Score with Perfect Sub | 6.31 | 6.94 |
| XLR Input | Yes | Yes |
| RCA Input | Yes | No |
| TRS Input | No | Yes |
| Optical Input | No | No |
| Coaxial Input | No | No |
| USB Input | No | No |
| HDMI Input | No | No |
| AES Input | No | No |
| Aux Input | No | No |
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 October 2, 2026 at 10:18 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: $719.98 per pair 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. Measured bass extension of 39.6Hz (-3dB).
Cons: The 6.31 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. A notch around 4.6kHz, where tweeter and woofer interact, and a hole below the tweeter axis mean the tweeter should sit at or above ear height.
Full Adam Audio T8V review and specifications →
| AES Input | No |
|---|---|
| Amplifier Power | 90w Per Speaker |
| App | No |
| Aux Input | No |
| Bass Extension (-10dB) | 33.2Hz (derived, log-interpolated between spinorama.org -9dB/-12dB points) |
| Bass Extension (-3dB) | 39.6Hz (measured, Audio Science Review) |
| Bluetooth | No |
| Coaxial Input | 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) |
| HDMI Input | No |
| Inputs | XLR, RCA |
| Optical Input | No |
| RCA Input | Yes |
| Spinorama Preference Score | 4.65 |
| Spinorama Preference Score with Perfect Sub | 6.31 |
| TRS Input | No |
| USB Input | No |
| Weight | 21.6 lbs (9.8 kg) |
| XLR Input | Yes |
- 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
JBL 306P MKII: $398 per pair B&H Photo Video eBay
Pros: A 6.94 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. Measured bass extension of 46.9Hz (-3dB).
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. A narrow dip around 1.6kHz shows in the on-axis and listening-window curves.
Full JBL 306P MKII review and specifications →
| AES Input | No |
|---|---|
| Amplifier Power | 112W total |
| App | No |
| Aux Input | No |
| Bass Extension (-10dB) | 38.6Hz (derived, log-interpolated between spinorama.org -9dB/-12dB points) |
| Bass Extension (-3dB) | 46.9Hz (measured, Audio Science Review) |
| Bluetooth | No |
| Coaxial Input | No |
| 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) |
| HDMI Input | No |
| Inputs | XLR, 1/4” TRS |
| Optical Input | No |
| RCA Input | No |
| Spinorama Preference Score | 5.06 |
| Spinorama Preference Score with Perfect Sub | 6.94 |
| TRS Input | Yes |
| USB Input | No |
| Weight | 13.4 lbs (6.1 kg) each |
| XLR Input | Yes |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons