The SunAudio Purified 4 4XA25A Fiber+Alu ranks #20 out of 144 total Medium Size Bookshelf Speakers for sound quality. See all Passive Home rankings for every top pick.
Brand: SunAudio
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#20 SunAudio Purified 4 4XA25A Fiber+Alu: $3,300 per pair SunAudio eBay
Pros: A variant of the modular Purified 4 with a Purifi 4” fiber cone woofer and a BlieSMa 25mm aluminium dome tweeter, each driver in its own CNC-machined aluminium sphere on a tripod stand. SunAudio’s Klippel measurements show an exceptionally flat response (0.17 on-axis and 0.12 listening window deviation), for a preference score of 6.44 that reaches 9.17 with an ideal subwoofer.
Cons: The 4” woofer limits bass to 71.3Hz (-3dB) and about 54.2Hz (-10dB), so it needs a subwoofer. The data comes from SunAudio and uses its reference DSP crossover, which the buyer has to reproduce, and no independent measurement exists. It needs separate amplification and DSP for each driver.
How it compares: Just above it: SunAudio Purified 4 4XA25A Alu+Alu. Just below it: AsciLab C5B - $2300 cheaper.
| Bass Extension (-10dB) | about 54.2Hz (measured, manufacturer spinorama data) |
|---|---|
| Bass Extension (-3dB) | 71.3Hz (measured, manufacturer spinorama data) |
| DIY Kit | No |
| Dimensions | 34.6” x 12.2” x 11” (880 x 310 x 280 mm) |
| Drivers | A Purifi 4” fiber cone woofer and a BlieSMa 25mm aluminium dome tweeter |
| Impedance | 4 ohms |
| Spinorama Preference Score | 6.44 (manufacturer spinorama data) |
| Spinorama Preference Score with Perfect Sub | 9.17 (manufacturer spinorama data) |
| Woofer Cabinet | sealed, separate spherical driver modules on tripod stand |
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