WooferGuy is reader-supported. When you buy through an Amazon link on this page we may earn a commission, at no extra cost to you. It never decides what we recommend. How this works.
JBL has confirmed what it will bring to the SEMA Show in Las Vegas this week (3–6 November): its second-generation RALLYBAR soundbars for UTVs, golf carts and boats, plus “new additions” to the BassPro range of powered car subwoofers. The release doesn’t name the new subs, but JBL’s own press images show a BassPro Nano 2, the successor to one of the smallest under-seat subwoofers you can buy.
The short version
- JBL is showing new BassPro powered subwoofers at SEMA 2026. The one pictured is the BassPro Nano 2.
- A design-award listing describes the Nano 2 as a 200 W RMS under-seat sub in a die-cast aluminum case, with an adaptive “AI Sound Boost”.
- No price, size or release date yet. The original BassPro Nano is still on sale.
- RALLYBAR Gen 2 (S2, 2 and XL2) makes its SEMA debut; it launched in February from $699.95.
BassPro Nano 2: what we know
JBL’s release only says the BassPro line pairs built-in amplification with compact enclosures for cars where space is tight, and that new models will be introduced at the show. The press kit includes product shots labelled BassPro Nano 2, and the product also appears in the iF Design award listings, which give a little more detail:
- Amplifier: 200 W RMS Class D, according to the iF listing. That would be double the original Nano’s 100 W RMS rating on paper.
- Enclosure: die-cast aluminum, which JBL says also helps shed heat.
- “AI Sound Boost”: processing that adapts the bass to volume and content in real time. JBL hasn’t explained how it works or whether it can be switched off.
- Installation: a rotating JBL badge so the logo reads correctly however the sub is mounted.
What’s missing matters more for an under-seat sub: driver size, dimensions, frequency response and inputs. Until JBL publishes those, we can’t say whether the Nano 2 will fit the same seats as the original.
| BassPro Nano (current) | BassPro Nano 2 (new) | BassPro SL2 | |
|---|---|---|---|
| Driver | 6 × 8-inch | Not announced | 8-inch |
| Amplifier | 100 W RMS (200 W max) | 200 W RMS (iF listing) | 125 W RMS |
| Frequency response | 30–150 Hz | Not announced | 35–120 Hz |
| Size | About 10.3 × 7.7 × 2.9 in | Not announced | About 13.6 × 10 × 2.8 in |
| Price / availability | On sale now | TBC | On sale now |
RALLYBAR Gen 2 gets its SEMA debut
The RALLYBAR Gen 2 family isn’t new (JBL launched it at the Miami boat show in February), but SEMA is its first big car-show outing. All three are IP67-rated Bluetooth soundbars designed to bolt onto roll cages, towers and frames:
- RALLYBAR S2: 21 inches, 150 W RMS, no lighting, $699.95 at launch.
- RALLYBAR 2: 21 inches, 150 W RMS, music-reactive LEDs, $899.95.
- RALLYBAR XL2: 35 inches, 300 W RMS, LEDs, $1,199.95. JBL says its four passive radiators give it bass comparable to a 10-inch subwoofer.
All three support Bluetooth 5.4, USB and RCA inputs, stereo pairing and Auracast linking with other JBL speakers, and JBL says they’re lighter than the first-generation bars. The RALLYBAR XL2 is already listed on Amazon.
What it means for you
- Need bass under a seat now? The current BassPro Nano and the larger BassPro SL2 are both available. Our BassPro SL2 review covers fit and setup, and our best underseat subwoofers guide compares the alternatives.
- Can you wait? If your seat space is very tight, it’s worth waiting a few weeks for the Nano 2’s dimensions. If it’s bigger than the original, the old Nano may still be the only thing that fits.
- Adding a sub to a factory stereo? Powered under-seat subs are the simplest route. Our factory stereo guide and wire gauge calculator cover the wiring.
Our take
Doubling the rated power in a metal case is a sensible upgrade for the smallest sub in JBL’s range; the original Nano is popular because it fits almost anywhere, not because it’s loud. The “AI” label tells us little until JBL explains what the processing does. We’d wait for full specs and a price before choosing the Nano 2 over the SL2 or a rival from Kicker or Rockford Fosgate. We’ll update this post when JBL confirms details at the show.