Short answer: the Yamaha NS-10 for better sound quality, the Yamaha NS-6490 for the lower price. The Yamaha NS-10 ranks #94 of 100 bookshelf speakers at $499. The Yamaha NS-6490 ranks #100 at $129.95, $369.05 cheaper.
On the Yamaha NS-10 side: Legendary studio reference monitor with a well-documented history; Yamaha’s original spec sheet included genuine measured data (frequency response, distortion, impedance. Set against that: A pronounced peak of about 7dB above the midrange average around 1.7kHz gives the sound a forward, bright, or “tinny” character - this is the real underlying issue, and it wasn’t actually fixed by the “Studio” revision.
What the Yamaha NS-6490 offers: Attractive industrial design with a large 8-inch woofer for the price. Watch for: Amir found the woofer runs essentially full-range with only a capacitor separating the mid and tweeter, letting all three drivers bleed into each other’s range and causing “rising amplitude” across the response.
Buy the Yamaha NS-10 if sound quality matters more than the price. Buy the Yamaha NS-6490 if the price matters more than sound quality.
If sound quality matters at all to you, skip both of these and look higher up the 100 bookshelf speakers instead.
Specifications Side By Side
| Yamaha NS-10 | Yamaha NS-6490 | |
|---|---|---|
| Price | $499 Discontinued | $129.95 |
| Ranked | #94 of 100 in Large Size Bookshelf Speakers | #100 of 100 in Large Size Bookshelf Speakers |
| Bass Extension (-10dB) | 75Hz (measured, Erin’s Audio Corner) | - |
| Bass Extension (-3dB) | 126Hz (measured, Erin’s Audio Corner) | - |
| Drivers | 7.1" woofer, 1.4" soft dome tweeter | 8" woofer, 4" midrange cone, 7/8" balanced dome tweeter (3-way, acoustic suspension) |
| Discontinued | Yes | - |
| Weight | 9.5 lbs / 4.3 kg | 13.2 lbs / 6 kg each |
| Sensitivity | 90.2dB (measured, Erin’s Audio Corner) | 89.6dB (2.83V/1m, measured, Audio Science Review) |
| Impedance | 8 ohms nominal, 5.4 ohms minimum (measured, Erin’s Audio Corner) | 8 ohms |
| Dimensions | 15"H x 8.5"W x 7.8"D (382.0 x 215.0 x 198.0 mm) | 16.2H x 10.5W x 13.2D in |
| Woofer Cabinet | sealed | - |
| Frequency Response | - | 45Hz - 23kHz (Manufacturer specified) |
| Output Power | - | 70W nominal, 140W max |
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The Two Speakers In Full
Yamaha NS-10: $499 Discontinued
Pros: Legendary studio reference monitor with a well-documented history; Yamaha’s original spec sheet included genuine measured data (frequency response, distortion, impedance, polar response) rather than just marketing numbers, unusually transparent for the era. Distortion, compression, and multitone performance all measured better than the reviewer expected for a decades-old design - in some respects competitive with newer speakers he’s tested. Vertical dispersion holds up reasonably well for a speaker of this vintage. The redesigned “Studio” cabinet is more robust than the original, with crossover tweaks and nicer binding-post terminals. Sealed cabinet design allows placement close to a wall without added boominess, though at the cost of overall bass extension.
Cons: A pronounced peak of about 7dB above the midrange average around 1.7kHz gives the sound a forward, bright, or “tinny” character - this is the real underlying issue, and it wasn’t actually fixed by the “Studio” revision. Comparing the Studio version’s measured response to the original NS-10M’s published data, the original arguably measures more linear - Yamaha’s fix (lowering tweeter level by 2-3dB) left the core midrange peak largely untouched, addressing the wrong problem. The famous “tissue paper over the tweeter” mixing-engineer trick doesn’t actually help - testing it directly showed it adds diffraction and comb filtering rather than correcting the real midrange peak. Poor horizontal directivity, especially in its designed on-console orientation - usable window is only about ±20° off the tweeter axis before tonal character shifts noticeably. Directivity mismatches between direct and reflected sound make this difficult to properly correct with EQ in a typical farfield listening setup with nearby wall reflections. Bass is quite limited (F3 around 100Hz in most rooms once corrected for the inflated on-axis sensitivity reading), typical of a small sealed monitor design. Correcting the main midrange peak with EQ likely requires two bands rather than a single simple filter, since the peak isn’t perfectly symmetrical. Possible age-related tweeter compression at very high output, potentially from degraded ferrofluid affecting heat dissipation in these decades-old drivers. Discontinued.
Full Yamaha NS-10 review and specifications →
| Bass Extension (-10dB) | 75Hz (measured, Erin's Audio Corner) |
|---|---|
| Bass Extension (-3dB) | 126Hz (measured, Erin's Audio Corner) |
| Dimensions | 15"H x 8.5"W x 7.8"D (382.0 x 215.0 x 198.0 mm) |
| Discontinued | Yes |
| Drivers | 7.1" woofer, 1.4" soft dome tweeter |
| Impedance | 8 ohms nominal, 5.4 ohms minimum (measured, Erin's Audio Corner) |
| Sensitivity | 90.2dB (measured, Erin's Audio Corner) |
| Weight | 9.5 lbs / 4.3 kg |
| Woofer Cabinet | sealed |
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Yamaha NS-6490: $129.95 Amazon
Pros: Attractive industrial design with a large 8-inch woofer for the price. Simple direct-driven woofer with capacitor-only mid/tweeter crossovers keeps the design straightforward.
Cons: Amir found the woofer runs essentially full-range with only a capacitor separating the mid and tweeter, letting all three drivers bleed into each other’s range and causing “rising amplitude” across the response. Extensive narrow peaking indicates numerous cabinet resonances - Amir noted, “we have more of them than I have ever seen.” Distortion is high across the measurement range, and directivity is highly variable, particularly vertically. With a 1.6 preference score, Amir concluded, “I just can’t recommend it,” noting that extensive EQ would not fix the underlying resonance issues.
Full Yamaha NS-6490 review and specifications →
| Dimensions | 16.2H x 10.5W x 13.2D in |
|---|---|
| Drivers | 8" woofer, 4" midrange cone, 7/8" balanced dome tweeter (3-way, acoustic suspension) |
| Frequency Response | 45Hz - 23kHz (Manufacturer specified) |
| Impedance | 8 ohms |
| Output Power | 70W nominal, 140W max |
| Sensitivity | 89.6dB (2.83V/1m, measured, Audio Science Review) |
| Weight | 13.2 lbs / 6 kg each |
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