Short answer: the JBL Studio 630 for imaging, the Technics SB-C700 for point-source geometry. The JBL’s directivity linearity keeps harmonics of the same instrument collocated rather than drifting, though it has a noticeable mid-range dip. The Technics puts a 1.9cm tweeter at the acoustic center of a 16cm flat-diaphragm woofer, but its 85dB sensitivity and 4-ohm impedance want a capable amplifier. They list at $1,699 against $699.
Buy the Technics SB-C700. It is rated higher for sound quality; the JBL Studio 630 is no longer sold new.
Still deciding? The full Passive Home rankings cover every ranked option.
Specifications Side By Side
| Technics SB-C700 | JBL Studio 630 | |
|---|---|---|
| Price | $1,699.00 per pair | $699 per pair Discontinued |
| Ranked | #60 of 134 in Large Size Bookshelf Speakers | #79 of 134 in Large Size Bookshelf Speakers |
| Bass Extension (-10dB) | 40.5Hz (measured, spinorama.org) | 37.0Hz (measured, Erin’s Audio Corner) |
| Bass Extension (-3dB) | 85.0Hz (measured, spinorama.org) | 54.2Hz (measured, Erin’s Audio Corner) |
| Dimensions | 8.7” x 13.2” x 11.3” (220 x 336 x 286 mm) each | 14-13/16”H x 9”W x 11-5/16”D |
| Impedance | 4 ohms | 6 ohms nominal, 4.7 ohms minimum (measured, Erin’s Audio Corner) |
| Sensitivity | 85dB (2.83V/1m) | 83.2dB (measured, Erin’s Audio Corner; 85dB manufacturer specified) |
| Drivers | Coaxial “Phase Precision Driver”: 1.9cm dome tweeter + 16cm flat-diaphragm woofer | 6.5” PolyPlas cone woofer, 1” compression driver (2414H-1) with waveguide |
| Weight | 18.7 lbs (8.5 kg) each | 19.8 lbs (9 kg) each |
| Woofer Cabinet | Bass reflex | - |
| Spinorama Preference Score | 5.11 | 3.67 |
| Spinorama Preference Score with Perfect Sub | 7.25 | 5.68 |
| DIY Kit | No | No |
| Frequency Response | - | 45Hz - 40,000Hz (manufacturer specified) |
| Power Handling | - | up to 150W |
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Prices on this page were last checked October 3, 2026 at 10:26 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
Technics SB-C700: $1,699.00 per pair Value Electronics USA Tube Audio eBay
Pros: Distinctive coincident “Phase Precision Driver”: a 1.9cm dome tweeter mounted at the exact acoustic center of a 16cm flat-diaphragm carbon-fiber/honeycomb-sandwich woofer, giving true point-source geometry. Directivity is unusually symmetric front-to-back and top-to-bottom (both horizontal and vertical average exactly 60°) and off axis sound tracks the on axis response unusually consistently for a large bookshelf speaker. Die-cast aluminum chassis and a high-gloss convex “Entasis form” cabinet with side panels up to 42mm thick for extra rigidity. Measured bass extension of 85.0Hz (-3dB).
Cons: 85dB sensitivity paired with a 4-ohm nominal impedance wants a fairly capable amplifier. Bass extension is shallow relative to its 6.5”-class woofer at -3dB (85.0Hz), though it reaches a more usable 40.5Hz at -10dB: a fairly steep low-end rolloff shape once past the reference band. At $1699/pair, some in the ASR community have questioned the value proposition against similarly-measuring alternatives at lower prices.
Full Technics SB-C700 review and specifications →
| Bass Extension (-10dB) | 40.5Hz (measured, spinorama.org) |
|---|---|
| Bass Extension (-3dB) | 85.0Hz (measured, spinorama.org) |
| DIY Kit | No |
| Dimensions | 8.7” x 13.2” x 11.3” (220 x 336 x 286 mm) each |
| Drivers | Coaxial “Phase Precision Driver”: 1.9cm dome tweeter + 16cm flat-diaphragm woofer |
| Impedance | 4 ohms |
| Sensitivity | 85dB (2.83V/1m) |
| Spinorama Preference Score | 5.11 |
| Spinorama Preference Score with Perfect Sub | 7.25 |
| Weight | 18.7 lbs (8.5 kg) each |
| Woofer Cabinet | Bass reflex |
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JBL Studio 630: $699 per pair Discontinued eBay
Pros: Excellent directivity linearity: harmonics of the same instrument stay collocated in the soundstage instead of drifting between positions, giving precise, stable imaging that holds up well into higher frequencies where many speakers start to beam and narrow. Good compression behavior: mid-bass stays taut and controlled from low to high volume without the sound falling apart or distorting as you turn it up. A pleasant, controlled mid-bass bump in the 60-100 Hz range adds punch to kick drums without bleeding into an uncontrolled boom on bass guitar. Horizontal radiation holds steady off-axis (about ±60°), so toe-in isn’t fussy. Compared directly to its predecessor, the JBL Studio 530, the reviewer would pick the 630 (smoother trend line through the upper mids and treble, and likely more dynamic headroom) as long as you’re willing to EQ. Measured bass extension of 54.2Hz (-3dB), with a measured sensitivity of 83.2dB.
Cons: Noticeable mid-range dip/scoop relative to the higher frequencies: not dramatic, but audibly “missing” something by the second or third track. Some tracks read as forward or aggressive around 2 kHz, like the upper frequencies are jumping out at you rather than sitting in stage depth. Needs EQ to bring the mid-range back up to be fully recommendable; without EQ available, the reviewer says he’d look at a different speaker entirely. Measured sensitivity (about 83.2dB) runs noticeably below the 85dB manufacturer spec, likely a byproduct of the mid-range dip skewing the average downward. Discontinued and no longer sold new.
Full JBL Studio 630 review and specifications →
| Bass Extension (-10dB) | 37.0Hz (measured, Erin’s Audio Corner) |
|---|---|
| Bass Extension (-3dB) | 54.2Hz (measured, Erin’s Audio Corner) |
| DIY Kit | No |
| Dimensions | 14-13/16”H x 9”W x 11-5/16”D |
| Drivers | 6.5” PolyPlas cone woofer, 1” compression driver (2414H-1) with waveguide |
| Frequency Response | 45Hz - 40,000Hz (manufacturer specified) |
| Impedance | 6 ohms nominal, 4.7 ohms minimum (measured, Erin’s Audio Corner) |
| Power Handling | up to 150W |
| Sensitivity | 83.2dB (measured, Erin’s Audio Corner; 85dB manufacturer specified) |
| Spinorama Preference Score | 3.67 |
| Spinorama Preference Score with Perfect Sub | 5.68 |
| Weight | 19.8 lbs (9 kg) each |
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