JBL XPL-90 vs Wharfedale Diamond 9.1

Last updated: August 18, 2026

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.

JBL XPL-90 vs Wharfedale Diamond 9.1

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
Drivers6.5" bass/mid driver, 1" titanium dome tweeter6.5" Kevlar cone woofer, 1" soft dome tweeter
Dimensions15.5"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)
Weight20.1 lbs / 9.1 kg each12.1 lbs / 5.5 kg (good version), 9.9 lbs / 4.5 kg (bad version) each
Sensitivity85dB (2.83V/1m, measured, Audio Science Review)87dB
Impedance6 ohms6 ohms
Power Handling100W nominal, 400W max-
Woofer Cabinet-ported
Discontinued-Yes

More useful head-to-heads from the same speaker class:

The Two Speakers In Full

JBL XPL-90: $1,298 used, discontinued (vintage, late 1980s)

JBL XPL-90 ranking card

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.

Dimensions15.5"H x 9.5"W x 9.8"D (394 x 241 x 248 mm)
Drivers6.5" bass/mid driver, 1" titanium dome tweeter
Impedance6 ohms
Power Handling100W nominal, 400W max
Sensitivity85dB (2.83V/1m, measured, Audio Science Review)
Weight20.1 lbs / 9.1 kg each

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Wharfedale Diamond 9.1: Discontinued

Wharfedale Diamond 9.1 ranking card

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.

Dimensions11.7"H x 7.6"W x 10.9"D (296.0 x 194.0 x 278.0 mm)
DiscontinuedYes
Drivers6.5" Kevlar cone woofer, 1" soft dome tweeter
Impedance6 ohms
Sensitivity87dB
Weight12.1 lbs / 5.5 kg (good version), 9.9 lbs / 4.5 kg (bad version) each
Woofer Cabinetported

As an eBay Partner, we may be compensated if you make a purchase.