Short answer: the JBL Studio 530. It ranks #8 of 21 bookshelf speakers at $399; the Wharfedale Diamond 12.1 ranks #10 and costs $599, so there is not much of a tradeoff to weigh.
What the JBL Studio 530 gets right: CEA2034 spinorama shows a fairly flat on-axis response. The tradeoff: A peak around 1.4kHz is attributed to a tweeter resonance.
On the Wharfedale Diamond 12.1 side: CEA2034 spinorama shows an almost flat on-axis response for a budget bookshelf speaker. The catch: A directivity error appears between 2-3kHz, showing up as a dip in both the on-axis and predicted in-room curves.
One note: the JBL Studio 530 is discontinued, but it still ranks #8 of 21 bookshelf speakers, ahead of most of what is still sold new, so it is worth considering used.
Buy the JBL Studio 530 if the ranking matters more than the price. Buy the Wharfedale Diamond 12.1 if the price matters more than the ranking.
Specifications Side By Side
| JBL Studio 530 | Wharfedale Diamond 12.1 | |
|---|---|---|
| Price | $399 Discontinued | $599 Discontinued |
| Ranked | #8 of 21 in Medium Size Bookshelf Speakers | #10 of 21 in Medium Size Bookshelf Speakers |
| Crossover Frequency | 1.5kHz | 2.6kHz |
| Dimensions | 18.375"H x 8.44"W x 8.75"D (467 x 214 x 222 mm) | 12.2"H x 7"W x 10.9"D (310 x 178 x 277 mm) |
| Impedance | 6 ohms | 8 ohms |
| Sensitivity | 86dB | 87dB |
| Drivers | 5.25" (130mm) PolyPlas™ cone woofer with SFG magnet, 1" (25mm) compression driver with Teonex® diaphragm on Bi-Radial® horn | 5" advanced polypropylene cone woofer, 1" textile dome tweeter |
| Discontinued | Yes | Yes |
| Weight | 17 lbs / 7.7 kg each | 15 lbs / 6.8 kg each |
| Woofer Cabinet | Ported | Ported |
The Two Speakers In Full
JBL Studio 530: $399 Discontinued
Pros: CEA2034 spinorama shows a fairly flat on-axis response. Predicted in-room response is very smooth aside from the high-frequency roll-off.
Cons: A peak around 1.4kHz is attributed to a tweeter resonance, and shows up as a distinct spike in harmonic distortion at that frequency along with a second resonance-driven bump around 2kHz. Response rolls off in the high frequencies and the tuning is a bit bass-shy overall. Cumulative spectral decay (waterfall) shows the same 1kHz-region resonances lingering in time. Discontinued.
| Crossover Frequency | 1.5kHz |
|---|---|
| Dimensions | 18.375"H x 8.44"W x 8.75"D (467 x 214 x 222 mm) |
| Discontinued | Yes |
| Drivers | 5.25" (130mm) PolyPlas™ cone woofer with SFG magnet, 1" (25mm) compression driver with Teonex® diaphragm on Bi-Radial® horn |
| Impedance | 6 ohms |
| Sensitivity | 86dB |
| Weight | 17 lbs / 7.7 kg each |
| Woofer Cabinet | Ported |
- Reviews, Comparisons and Sound Samples
- Buy Used
- Head-to-Head Comparisons
- Links
Wharfedale Diamond 12.1: $599 Discontinued
Pros: CEA2034 spinorama shows an almost flat on-axis response for a budget bookshelf speaker. Predicted in-room response is very nice aside from a dip around 2kHz. Horizontal beamwidth of about ±70 degrees is wide, though a bit uneven.
Cons: A directivity error appears between 2-3kHz, showing up as a dip in both the on-axis and predicted in-room curves. Vertical directivity requires staying within about 30 degrees of the tweeter axis for accurate tonal balance. Distortion rises substantially at 96dB SPL/1m below 50Hz, where the woofer runs out of headroom without a high-pass filter - a real limitation for a compact 5” driver at higher output. Discontinued.
| Crossover Frequency | 2.6kHz |
|---|---|
| Dimensions | 12.2"H x 7"W x 10.9"D (310 x 178 x 277 mm) |
| Discontinued | Yes |
| Drivers | 5" advanced polypropylene cone woofer, 1" textile dome tweeter |
| Impedance | 8 ohms |
| Sensitivity | 87dB |
| Weight | 15 lbs / 6.8 kg each |
| Woofer Cabinet | Ported |
- Reviews, Comparisons and Sound Samples
- Buy Used
- Head-to-Head Comparisons
- Links
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Product prices and availability were last checked August 9, 2026 at 6:57 AM UTC 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.