Klipsch R-121SW vs SVS PB-4000
The Klipsch R-121SW costs less ($650 vs $1,600). The SVS PB-4000 has more amplifier power (1,200 W vs 200 W), has a bigger driver (13.5 in vs 12 in) and plays lower (13 Hz vs 28 Hz).
What each one works with
Checked against every product in our catalogue by the same engine as the compatibility checker.
| R-121SW | PB-4000 | |
|---|---|---|
| Receivers it connects to | 26 of 26 | 26 of 26 |
Specs side by side
Values that differ are bold. A dash means that model doesn't publish the spec.
| R-121SW | PB-4000 | |
|---|---|---|
| Amplifier | 200 W | 1200 W |
| Drivers | 1 × 305 mm | 1 × 343 mm |
| Low end | 28 Hz | 13 Hz |
| Inputs | Line | Line |
| Size | 16×17×20 in | 20×23×28 in |
| Weight | 16 kg (35.3 lb) | 69.5 kg (153.2 lb) |
| MSRP | $650 each (MSRP, September 2026) | $1,600 each (MSRP, September 2026) |
Every spec and pairing: Klipsch R-121SW, SVS PB-4000.
Try either one in your own room.
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References
- Klipsch R-121SW: Spec sheet, assets.klipsch.com, retrieved September 15, 2026
- Klipsch R-121SW: Retailer listing, bestbuy.com, retrieved September 15, 2026
- SVS PB-4000: Manufacturer product page, svsound.com, retrieved September 15, 2026
- SVS PB-4000: Owner's manual, cdn.shopify.com, retrieved September 15, 2026
- SVS PB-4000: Retailer listing, homemedialimited.co.uk, retrieved September 15, 2026
- SVS PB-4000: Owner's manual, cdn.shopify.com, retrieved September 15, 2026 (2)
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