Short answer: the GR-Research NX-Studio. It ranks #4 of 222 bookshelf speakers by sound quality, rated 4.8/5, at $3,630; the Dynaudio Heritage Special ranks #29, rated 4.4/5, and costs $7,000, which makes this an easy call rather than a real tradeoff.
What the Dynaudio Heritage Special does well: A limited edition bookshelf speaker with huge output for its size, robust bass, and a big, well proportioned soundstage. The catch: At lower listening volumes, dynamic range and kick-drum punch fell short of higher-sensitivity speakers the reviewer has tested (JBL 4367, KEF Reference 1 Meta): the sheer output ceiling is impressive, but it isn’t a highly dynamic-sounding speaker at modest levels.
The GR-Research NX-Studio is the better-sounding option. A DIY kit bookshelf speaker with a ribbon tweeter for wide open, detailed sound, superb imaging, and tight, fast sealed bass. The catch: Bass will be very tight but won’t be quite as deep as others due to the sealed woofer enclosure.
Buy the GR-Research NX-Studio. It is rated higher for sound quality than the Dynaudio Heritage Special and costs less, which makes it the one to get unless you need something the other one does better.
Want more options? Browse the full Passive Home rankings.
A limited edition bookshelf speaker with huge output for its size, robust bass, and a big, well proportioned soundstage.
A DIY kit bookshelf speaker with a ribbon tweeter for wide open, detailed sound, superb imaging, and tight, fast sealed bass.
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Specifications Side By Side
| Dynaudio Heritage Special | GR-Research NX-Studio | |
|---|---|---|
| Price | $7,000 per pair | $3630 per pair |
| Ranked | #29 of 222 in Large Size Bookshelf Speakers | #4 of 222 in Large Size Bookshelf Speakers |
| Drivers | 18cm MSP cone woofer, 28mm Esotar 3 dome tweeter | GR-Research M165NQ 6.5” paper cone, non-resonant polymer frame, copper shorting rings and aluminum phase plug sealed enclosure woofer, GR-Research Neo3 Planar Magnetic Ribbon open baffle tweeter |
| Dimensions | 15.2”H x 8.2”W x 12.6”D (385 x 208 x 320 mm) | 18”H x 8.5”W x 15.5”D (457.2 x 215.9 x 393.7 mm) |
| Weight | 24.3 lbs (11 kg) each | 20.5 lbs (9.3 kg) each |
| Impedance | 5.1 ohms minimum, ported mode (measured, Erin’s Audio Corner) | 8 ohms |
| Sensitivity | 85dB (measured at 2.83V/1m, Erin’s Audio Corner) | 87dB |
| Bass Extension (-3dB) | 52Hz (measured, Erin’s Audio Corner) | - |
| Bass Extension (-10dB) | 38Hz (measured, Erin’s Audio Corner) | - |
| Country | Denmark | - |
| Spinorama Preference Score | 4.32 | - |
| Spinorama Preference Score with Perfect Sub | 6.33 | - |
| DIY Kit | No | Yes |
| Woofer Cabinet | - | sealed |
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