Short answer: the JBL XPL-90. It ranks #71 of 100 bookshelf speakers by sound quality; the Wharfedale Diamond 9.1 ranks #79.
What the JBL XPL-90 offers: Nearly ruler-flat on-axis response up to 1kHz with even horizontal directivity until the tweeter beams above 10kHz. Watch for: Crossover region peaking around 3kHz and treble peaking above 10kHz color the top end, and poor vertical directivity means the tweeter needs to be at ear level.
On the Wharfedale Diamond 9.1 side: The first design was a pretty good sounding speaker. Set against that: All current new ones sold today are the crap version.
Buy the JBL XPL-90 if sound quality matters more than the price. Buy the Wharfedale Diamond 9.1 if the price matters more than sound quality.
If sound quality matters at all to you, skip the Wharfedale Diamond 9.1. It ranks near the bottom of the 100 bookshelf speakers, so look higher up the list instead.

Specifications Side By Side
| JBL XPL-90 | Wharfedale Diamond 9.1 | |
|---|---|---|
| Price | $1,298 used, discontinued (vintage, late 1980s) | Discontinued |
| Ranked | #71 of 100 in Large Size Bookshelf Speakers | #79 of 100 in Large Size Bookshelf Speakers |
| Drivers | 6.5" bass/mid driver, 1" titanium dome tweeter | 6.5" Kevlar cone woofer, 1" soft dome tweeter |
| Dimensions | 15.5"H x 9.5"W x 9.8"D (394 x 241 x 248 mm) | 11.7"H x 7.6"W x 10.9"D (296.0 x 194.0 x 278.0 mm) |
| Weight | 20.1 lbs / 9.1 kg each | 12.1 lbs / 5.5 kg (good version), 9.9 lbs / 4.5 kg (bad version) each |
| Sensitivity | 85dB (2.83V/1m, measured, Audio Science Review) | 87dB |
| Impedance | 6 ohms | 6 ohms |
| Power Handling | 100W nominal, 400W max | - |
| Woofer Cabinet | - | ported |
| Discontinued | - | Yes |
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The Two Speakers In Full
JBL XPL-90: $1,298 used, discontinued (vintage, late 1980s)
Pros: Nearly ruler-flat on-axis response up to 1kHz with even horizontal directivity until the tweeter beams above 10kHz. The reviewer found real strength with vocals and simpler instrumentation, calling it “the first speaker I have liked that has some clear response errors” and “an enjoyable speaker” despite the flaws. Titanium tweeter and internal Monster cable wiring reflect JBL’s higher-end late-1980s engineering.
Cons: Crossover region peaking around 3kHz and treble peaking above 10kHz color the top end, and poor vertical directivity means the tweeter needs to be at ear level. Distortion rises at 96dB SPL, especially around 3kHz. Long discontinued; only available on the used market.
Full JBL XPL-90 review and specifications →
| Dimensions | 15.5"H x 9.5"W x 9.8"D (394 x 241 x 248 mm) |
|---|---|
| Drivers | 6.5" bass/mid driver, 1" titanium dome tweeter |
| Impedance | 6 ohms |
| Power Handling | 100W nominal, 400W max |
| Sensitivity | 85dB (2.83V/1m, measured, Audio Science Review) |
| Weight | 20.1 lbs / 9.1 kg each |
As an eBay Partner, we may be compensated if you make a purchase.
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
Wharfedale Diamond 9.1: Discontinued
Pros: The first design was a pretty good sounding speaker, the speaker was then outsourced to China and lost 1.5kg and was made with cheap parts and sounds much worse. Slightly rolled off in the treble by about 3dB
Cons: All current new ones sold today are the crap version. Discontinued.
Full Wharfedale Diamond 9.1 review and specifications →
| Dimensions | 11.7"H x 7.6"W x 10.9"D (296.0 x 194.0 x 278.0 mm) |
|---|---|
| Discontinued | Yes |
| Drivers | 6.5" Kevlar cone woofer, 1" soft dome tweeter |
| Impedance | 6 ohms |
| Sensitivity | 87dB |
| Weight | 12.1 lbs / 5.5 kg (good version), 9.9 lbs / 4.5 kg (bad version) each |
| Woofer Cabinet | ported |
As an eBay Partner, we may be compensated if you make a purchase.
- Reviews, Comparisons and Sound Samples
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- Wharfedale Diamond 9.1 vs B&W 805S
- Wharfedale Diamond 9.1 vs KEF Q350
- Wharfedale Diamond 9.1 vs Aperion Audio Verus V8B
- Wharfedale Diamond 9.1 vs Triad In-Room Gold LCR
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