Short answer: the Q Acoustics 3050c. Both are rated 4.2/5 for sound quality (#97 and #107 of 226 floorstanding speakers), and the Q Acoustics 3050c costs $1,349 against $1,498 for the Wharfedale Diamond 12.4i, and with sound quality even, the cheaper one is the better buy.
The case for the Q Acoustics 3050c: Floorstanding tower in the 3000c range featuring dual 5.5-inch C3 Continuous Curved Cone woofers with Helmholtz Pressure Equalizer (HPE) tubes and P2P bracing. The catch: Rating estimated based on 3000c series sibling testing.
What the Wharfedale Diamond 12.4i does well: The largest tower in Wharfedale’s 2025 Diamond 12i range and the update of the Wharfedale Diamond 12.4, keeping its twin 6.5” Klarity woofers and 2.5-way layout in a 40.8L cabinet with a refined port and damping. Watch for: No independent measurements yet, so its tonal balance and directivity can’t be compared with ranked speakers.
Buy the Q Acoustics 3050c. Both are rated the same for sound quality, and it costs $149 less than the Wharfedale Diamond 12.4i.
About the ratings: neither speaker has been measured yet, so both ratings are estimated from measured siblings and predecessors (likely ranges: Q Acoustics 3050c 4.0 to 4.4; Wharfedale Diamond 12.4i 3.9 to 4.5). Treat this verdict as provisional.
Still deciding? The full Passive Home rankings cover every ranked option.
Specifications Side By Side
| Q Acoustics 3050c | Wharfedale Diamond 12.4i | |
|---|---|---|
| Price | $1,349.00 per pair | $1,498 per pair |
| Ranked | #97 of 226 in Large Size Floorstanding Speakers Estimated | #107 of 226 in Large Size Floorstanding Speakers Estimated |
| Drivers | 0.9” (22mm) decoupled tweeter, 2 x 5.5” (140mm) C3 Continuous Curved Cone woofers | 1x 1” woven polyester dome tweeter, 2x 6.5” Klarity polypropylene woofers |
| Frequency Response | 42Hz - 30kHz (-6dB, manufacturer specified) | 40Hz - 20kHz (±3dB, manufacturer specified) |
| Sensitivity | 89.0dB (2.83V/1m, manufacturer specified) | 89dB (manufacturer specified) |
| Impedance | 6 ohms nominal, 3.8 ohms minimum (manufacturer specified) | 8 ohms nominal (manufacturer specified) |
| Bass Extension (-6dB) | 42Hz (manufacturer specified) | - |
| Dimensions | 39.4”H x 7.9”W x 12.2”D (1000 x 200 x 310 mm) | 43.3”H x 7.9”W x 13.8”D (1100 x 200 x 350 mm) |
| Weight | 39.2 lbs (17.8 kg) each | 49.4 lbs (22.4 kg) each |
| DIY Kit | No | - |
| Bass Extension (-3dB) | - | 40Hz (manufacturer specified) |
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- Q Acoustics 3050c vs Bowers & Wilkins 603 S3
- Wharfedale Diamond 12.4i vs Wharfedale EVO 5.3
Prices on this page were last checked October 11, 2026 at 4:59 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
Q Acoustics 3050c: $1,349.00 per pair Estimated Amazon eBay
Same family: the Q Acoustics 3010c (smallest bookshelf, estimated 3.4/5), the Q Acoustics 3020c (bookshelf, estimated 2.6/5), the Q Acoustics 3030c (largest bookshelf, estimated 3.8/5) and the Q Acoustics 3090c (center, estimated 3.5/5). See every Q Acoustics 3000 Series generation.
Pros: Floorstanding tower in the 3000c range featuring dual 5.5-inch C3 Continuous Curved Cone woofers with Helmholtz Pressure Equalizer (HPE) tubes and P2P bracing. Delivers deep, articulate bass extension down to 42Hz (-6dB) and refined on-axis linearity with low cabinet resonance.
Cons: Rating estimated based on 3000c series sibling testing. Minimum impedance dips to 3.8 ohms, requiring an amplifier capable of driving low-impedance loads cleanly.
Full Q Acoustics 3050c review and specifications →
| Released | Apr 2025 (1 year ago) |
|---|---|
| Bass Extension (-6dB) | 42Hz (manufacturer specified) |
| DIY Kit | No |
| Dimensions | 39.4”H x 7.9”W x 12.2”D (1000 x 200 x 310 mm) |
| Drivers | 0.9” (22mm) decoupled tweeter, 2 x 5.5” (140mm) C3 Continuous Curved Cone woofers |
| Frequency Response | 42Hz - 30kHz (-6dB, manufacturer specified) |
| Impedance | 6 ohms nominal, 3.8 ohms minimum (manufacturer specified) |
| Sensitivity | 89.0dB (2.83V/1m, manufacturer specified) |
| Weight | 39.2 lbs (17.8 kg) each |
- Links
- Reviews, Comparisons and Sound Samples
- No independent measurement review is linked for this model; it is ranked from hands-on listening and comparison against similarly priced speakers.
- Head-to-Head Comparisons
Wharfedale Diamond 12.4i: $1,498 per pair Estimated Music Direct eBay
Older model: the Wharfedale Diamond 12.4 (ranked lower, estimated 4.1/5). See every Wharfedale Diamond generation.
Same family: the Wharfedale Diamond 12.0i (smaller bookshelf, estimated 3.2/5), the Wharfedale Diamond 12.1i (larger bookshelf, estimated 4/5), the Wharfedale Diamond 12.3i (smaller floorstanding, ranked lower, estimated 4/5) and the Wharfedale Diamond 12.Ci (center, estimated 3.6/5).
Pros: The largest tower in Wharfedale’s 2025 Diamond 12i range and the update of the Wharfedale Diamond 12.4, keeping its twin 6.5” Klarity woofers and 2.5-way layout in a 40.8L cabinet with a refined port and damping. Rated to 40Hz (±3dB) at 89dB sensitivity, it fills a larger room without a subwoofer.
Cons: No independent measurements yet, so its tonal balance and directivity can’t be compared with ranked speakers. The changes over the 12.4 are refinements rather than new drivers, and at 22.4 kg per speaker it needs room to breathe away from walls.
Full Wharfedale Diamond 12.4i review and specifications →
| Released | Jan 2026 (9 months ago) |
|---|---|
| Bass Extension (-3dB) | 40Hz (manufacturer specified) |
| Dimensions | 43.3”H x 7.9”W x 13.8”D (1100 x 200 x 350 mm) |
| Drivers | 1x 1” woven polyester dome tweeter, 2x 6.5” Klarity polypropylene woofers |
| Frequency Response | 40Hz - 20kHz (±3dB, manufacturer specified) |
| Impedance | 8 ohms nominal (manufacturer specified) |
| Sensitivity | 89dB (manufacturer specified) |
| Weight | 49.4 lbs (22.4 kg) each |
- Links
- Reviews, Comparisons and Sound Samples
- No independent measurement review is linked for this model; it is ranked from hands-on listening and comparison against similarly priced speakers.
- Head-to-Head Comparisons