JBL BassPro SL2 Powered Subwoofer vs NVX QB10SPA
The NVX QB10SPA is the stronger pick for most shoppers: 350W RMS versus 125W, deeper 20Hz response, and a slot-ported enclosure, at $179.99 versus $303.95 at Crutchfield as of November 3, 2026. The JBL BassPro SL2 is the better choice only if you need the slimmest possible under-seat fit, since its 2.875-inch height is far lower than the NVX's 5.7-inch depth. On price and output, the NVX wins clearly.
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JBL BassPro SL2 Powered Subwoofer
4.5$303.95at CrutchfieldObserved Nov 2, 2026, 5:31 PM
Choose the JBL BassPro SL2 if you have very shallow under-seat space and want a low-profile 8-inch sub that fits where a boxier enclosure will not.
Pros
- Very slim 2.875-inch profile fits under tight seats
- Adjustable 50Hz-120Hz crossover with 12dB/octave slope
- Bass boost up to +9dB at 70Hz
- Low quiescent draw under 800mA
Cons
- Only 125W RMS, the least powerful of the two
- Shallower 35Hz low end
- Costs about $124 more than the NVX
What separates them
| JBL BassPro SL2 Powered Subwoofer | NVX QB10SPA | |
|---|---|---|
| Amplifier power | 125W RMS | 350W RMS (1200W peak) |
| Frequency response | 35Hz-120Hz | 20Hz-250Hz |
| Enclosure | Sealed ABS, 2.875" tall | Slot-ported, black carpet, 5.7" deep |
| Bass boost | 0 to +9dB at 70Hz | Remote bass level controller |
| Inputs | Line-level and high-level | RCA preamp and speaker-level |
| Price | $303.95 at Crutchfield as of November 3, 2026 | $179.99 as of November 3, 2026 |
| Mounting height/depth | 2.875" tall | 5.7" deep |
| Crossover | Adjustable 50Hz-120Hz, 12dB/octave |
Price history
$303.95$179.99
- JBL BassPro SL2 Powered Subwoofer: lowest $303.95 on Oct 29 at Amazon; $303.95 on Nov 2.
- NVX QB10SPA: lowest $179.99 on Oct 29 at NVX; $179.99 on Nov 1.
Prices at every store
JBL BassPro SL2 Powered Subwoofer
- CrutchfieldNew
In stock
$303.95Free shippingObserved Nov 2, 2026, 5:31 PM - JBLNew
In stock
$303.95Free shippingObserved Nov 2, 2026, 5:31 PM
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- SonicElectronix.comCheck price at SonicElectronix.com
NVX QB10SPA
- WalmartCheck price at Walmart
- WalmartCheck price at Walmart
- Best BuyCheck price at Best Buy
Specs compared
| Spec | JBL BassPro SL2 Powered Subwoofer | NVX QB10SPA |
|---|---|---|
| Frequency response | 35Hz-120Hz | 20 - 250 Hz |
| Amplifier power | 125W RMS | — |
| Woofer diameter | 8" (200mm) | — |
| Fuse rating | 15A | — |
| Maximum current draw | 12A | — |
| Quiescent current draw | <800mA | — |
| Input sensitivity | 0.05V - 2V line-level input; 0.5V - 20V high-le… | — |
| Crossover frequency | 50Hz - 120Hz | — |
| Crossover slope | 12dB/octave | — |
| Bass boost | 0dB to +9dB @70Hz | — |
Questions and answers
- Which hits harder, the JBL BassPro SL2 or the NVX QB10SPA?
- The NVX QB10SPA. It runs 350W RMS against the JBL's 125W and reaches down to 20Hz versus 35Hz.
- Which fits under a truck or SUV seat better?
- The JBL BassPro SL2. At 2.875 inches tall it is far slimmer than the NVX's 5.7-inch depth.
- Is the JBL worth the extra money?
- Only if shallow mounting space is your priority. The NVX costs $179.99 versus $303.95 at Crutchfield as of November 3, 2026 and delivers more power and deeper bass.
- Do both work with a factory stereo?
- Yes. Both accept speaker-level (high-level) inputs, so either can tap a stock head unit.
- Which has a remote bass knob?
- The NVX QB10SPA includes a remote bass level controller. The JBL has onboard bass boost instead.
- Which is smaller overall?
- The JBL is 13.5 by 2.875 by 10.125 inches. The NVX is 12.99 by 5.7 by 5.7 inches, so it is narrower but much deeper.