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 Buchardt Audio E50 ranks #16, rated 4.5/5, and costs $4,600, which makes this an easy call rather than a real tradeoff.
What the Buchardt Audio E50 does well: A bookshelf speaker with remarkably deep bass for its size, a very neutral midrange, and low distortion, with no need to sit near a wall. Watch for: A roughly 3dB dip in the upper midrange/lower treble softens attack and dialogue clarity: the reviewer’s main complaint, and it’s baked into the crossover rather than a directivity artifact, so it’s audible both on and off axis.
What the GR-Research NX-Studio does well: A DIY kit bookshelf speaker with a ribbon tweeter for wide open, detailed sound, superb imaging, and tight, fast sealed bass. Watch for: 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 Buchardt Audio E50 and costs less, which makes it the one to get unless you need something the other one does better.
Still deciding? The full Passive Home rankings cover every ranked option.
A bookshelf speaker with remarkably deep bass for its size, a very neutral midrange, and low distortion, with no need to sit near a wall.
A DIY kit bookshelf speaker with a ribbon tweeter for wide open, detailed sound, superb imaging, and tight, fast sealed bass.
Prices on this page were last checked October 31, 2026 at 7:11 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.
As an eBay Partner, we may be compensated if you make a purchase.
Specifications Side By Side
| Buchardt Audio E50 | GR-Research NX-Studio | |
|---|---|---|
| Price | $4600 per pair | $3630 per pair |
| Ranked | #16 of 222 in Large Size Bookshelf Speakers | #4 of 222 in Large Size Bookshelf Speakers |
| Bass Extension (-10dB) | 34Hz (measured, Erin’s Audio Corner) | - |
| Bass Extension (-3dB) | 40Hz (measured, Erin’s Audio Corner) | - |
| Dimensions | 15.6” x 7.5” x 11.2” (395 x 190 x 284 mm) | 18”H x 8.5”W x 15.5”D (457.2 x 215.9 x 393.7 mm) |
| Impedance | 4 ohms nominal | 8 ohms |
| Sensitivity | 83.1dB (2.83V/1m, measured by Erin’s Audio Corner) | 87dB |
| Drivers | 1” Scanspeak dome tweeter with waveguide, 6.5” Purifi extended-stroke woofer, dual 6.5” passive radiators | 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 |
| Weight | 19 lbs (8.6 kg) each | 20.5 lbs (9.3 kg) each |
| Woofer Cabinet | Passive radiator loaded | sealed |
| Crossover Frequency | 2000Hz | - |
| Frequency Response | 36Hz - 30kHz ±3dB (Manufacturer specified) | - |
| Recommended Power | 60W - 200W | - |
| Country | Denmark | - |
| Spinorama Preference Score | 5.84 | - |
| Spinorama Preference Score with Perfect Sub | 7.61 | - |
| DIY Kit | No | Yes |
Related Speaker Comparisons
More worthwhile head-to-heads for GR-Research NX-Studio: