The Theory Audio sb25 ranks #71 out of 131 total Large Size Bookshelf Speakers for sound quality. See Top Recommended Speakers By Attribute for all the top speaker suggestions.
Prices on this page were last checked August 25, 2026 at 6:19 AM 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.
As an eBay Partner, we may be compensated if you make a purchase.
#71 Theory Audio sb25: $1,700 each World Wide Stereo eBay
Pros: Strong local Spinorama scores of 3.44 raw and 6.10 with a subwoofer, plus very wide, well-controlled dispersion and high output from a cabinet only 3.8 inches deep. Optional tabletop stands allow conventional bookshelf or console placement.
Cons: It requires a Theory controller-amplifier channel and model-specific DSP, making it much less straightforward than a normal passive speaker. The installation-focused form factor, per-speaker pricing and 60Hz measured extension limit value for ordinary stereo systems.
How it compares: Just above it: Polk Signature Elite ES20 - $1341 cheaper. Just below it: PS Audio Aspen FR5 - $1799 more.
| Bandwidth | 54Hz-23kHz (-6dB) |
|---|---|
| Coverage | 125 degrees conical |
| Dimensions | 21.5H x 9.5W x 3.8D in |
| Drivers | Dual 5-inch carbon-fiber woofers, 1.4-inch compression driver |
| Enclosure | Passive sealed surface/tabletop speaker |
| Impedance | 4 ohms |
| Maximum Output | 123dB peak at 1m |
| Power Handling | 200W AES, 800W peak |
| Weight | 23 lbs each |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons