Coverage note. Speaker Ranking currently covers 5 SunAudio models across passive speakers. These are the products in our database, not a complete list of everything SunAudio makes.
What this page covers. The SunAudio models ranked here span passive speakers, including SunAudio Purified 4, SunAudio Purified 4 4XA25B Alu+Beryllium and SunAudio Purified 4 4XA25A Alu+Alu. Use each model’s category position to compare it with alternatives of the same size and use case.
This page lists all 5 SunAudio speakers ranked on this site across passive speakers. Each model is shown in the category where it competes, with its current rank and the size of that ranking.
Use the category position rather than the brand name alone: speakers from the same manufacturer can perform very differently by size, price and product family.
Prices on this page were last checked October 6, 2026 at 10:23 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.
Medium Size Bookshelf Speakers
Ranked #9 of 144 in Medium Size Bookshelf Speakers - SunAudio Purified 4: $3,650 per pair as tested; modular kit, pricing varies by driver/finish configuration SunAudio eBay
Pros: On-axis response is essentially dead flat from 100Hz to 20kHz, staying within about ±1dB through most of the band and widening only to a gentle +1.5dB rise in the top octave. The listening window curve tracks on-axis almost exactly, meaning off-axis output stays consistent rather than diverging. Both directivity index curves rise smoothly and monotonically from the bass straight through to 20kHz with no bumps, dips, or discontinuities: a sign of very well-integrated driver-to-driver handoff from the beryllium-dome tweeter. Early reflections and sound power both decline smoothly with frequency, with no resonant peaks anywhere in the response. The manufacturer’s own preference-score modeling comes out to 6.65 unequalized (rising to 9.36 with an ideal subwoofer) with a frequency deviation of just 0.8dB across 300Hz-5kHz: genuinely flagship-tier numbers for a 4-inch woofer design. Distinctive modular build: separate CNC-machined aluminum enclosures for the Purifi 4” woofer and BlieSMa T25A beryllium-dome tweeter, mounted on their own tripod stand, with cone-material and finish options. Measured sensitivity of 84.4dB.
Cons: A 4-inch woofer means real bass extension is limited (-3dB around 71Hz and -10dB around 53Hz) so a subwoofer is needed for anything below the low-100s. Measured sensitivity of 84.4dB is on the low side, meaning it needs more amplifier power than more efficient designs to reach the same volume. This is manufacturer self-measured data with no independent third-party review, so there’s no outside verification of distortion, unit-to-unit consistency, or how the reference crossover performs outside SunAudio’s own lab. The modular two-sphere design and tripod stand is unconventional, and pricing is steep for such a small woofer given the niche, boutique nature of the brand.
Full SunAudio Purified 4 review and specifications →
| Bass Extension (-10dB) | 53Hz (measured, manufacturer spinorama data) |
|---|---|
| Bass Extension (-3dB) | 71Hz (measured, manufacturer spinorama data) |
| DIY Kit | No |
| Dimensions | 34.6” x 12.2” x 11” (880 x 310 x 280 mm) |
| Drivers | BlieSMa T25A beryllium-dome tweeter (own CNC aluminum enclosure), Purifi 4” Ultra Low Distortion Extended woofer (PP-coated paper/fiber cone) |
| Impedance | 4 ohms |
| Power Handling | 200W long-term max (woofer) |
| Sensitivity | 84.4dB (2.83V/1m, measured, manufacturer spinorama data) |
| Spinorama Preference Score | 6.73 (manufacturer spinorama data) |
| Spinorama Preference Score with Perfect Sub | 9.44 (manufacturer spinorama data) |
| Woofer Cabinet | sealed, separate spherical driver modules on tripod stand |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
Ranked #12 of 144 in Medium Size Bookshelf Speakers - SunAudio Purified 4 4XA25B Alu+Beryllium: $3,650 per pair SunAudio eBay
Pros: A variant of the modular Purified 4 with a Purifi 4” aluminium cone woofer and a BlieSMa 25mm beryllium dome tweeter, each driver in its own CNC-machined aluminium sphere on a tripod stand. SunAudio’s Klippel measurements show an exceptionally flat response (0.13 on-axis and 0.08 listening window deviation), for a preference score of 6.67 that reaches 9.38 with an ideal subwoofer.
Cons: The 4” woofer limits bass to 70.3Hz (-3dB) and about 55Hz (-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.
Full SunAudio Purified 4 4XA25B Alu+Beryllium review and specifications →
| Bass Extension (-10dB) | about 55Hz (measured, manufacturer spinorama data) |
|---|---|
| Bass Extension (-3dB) | 70.3Hz (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” aluminium cone woofer and a BlieSMa 25mm beryllium dome tweeter |
| Impedance | 4 ohms |
| Spinorama Preference Score | 6.67 (manufacturer spinorama data) |
| Spinorama Preference Score with Perfect Sub | 9.38 (manufacturer spinorama data) |
| Woofer Cabinet | sealed, separate spherical driver modules on tripod stand |
- Links
- Reviews, Comparisons and Sound Samples
Ranked #19 of 144 in Medium Size Bookshelf Speakers - SunAudio Purified 4 4XA25A Alu+Alu: $3,300 per pair SunAudio eBay
Pros: A variant of the modular Purified 4 with a Purifi 4” aluminium 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 (0.19 on-axis and 0.11 listening window deviation), for a preference score of 6.48 that reaches 9.22 with an ideal subwoofer.
Cons: The 4” woofer limits bass to 71.3Hz (-3dB) and about 54.7Hz (-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.
Full SunAudio Purified 4 4XA25A Alu+Alu review and specifications →
| Bass Extension (-10dB) | about 54.7Hz (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” aluminium cone woofer and a BlieSMa 25mm aluminium dome tweeter |
| Impedance | 4 ohms |
| Spinorama Preference Score | 6.48 (manufacturer spinorama data) |
| Spinorama Preference Score with Perfect Sub | 9.22 (manufacturer spinorama data) |
| Woofer Cabinet | sealed, separate spherical driver modules on tripod stand |
- Links
- Reviews, Comparisons and Sound Samples
Ranked #20 of 144 in Medium Size Bookshelf Speakers - 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.
Full SunAudio Purified 4 4XA25A Fiber+Alu review and specifications →
| 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 |
- Links
- Reviews, Comparisons and Sound Samples
Ranked #23 of 144 in Medium Size Bookshelf Speakers - SunAudio Purified 4 4XA25A tw35mm: $2,800 per pair SunAudio eBay
Pros: A variant of the modular Purified 4 with a Purifi 4” woofer and a BlieSMa 25mm aluminium dome tweeter in the configuration SunAudio labels tw35mm, each driver in its own CNC-machined aluminium sphere on a tripod stand. SunAudio’s Klippel measurements show an exceptionally flat response (0.20 on-axis and 0.17 listening window deviation), for a preference score of 6.14 that reaches 8.74 with an ideal subwoofer.
Cons: The 4” woofer limits bass to 73.4Hz (-3dB) and about 42Hz (-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.
Full SunAudio Purified 4 4XA25A tw35mm review and specifications →
| Bass Extension (-10dB) | about 42Hz (measured, manufacturer spinorama data) |
|---|---|
| Bass Extension (-3dB) | 73.4Hz (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” woofer and a BlieSMa 25mm aluminium dome tweeter in the configuration SunAudio labels tw35mm |
| Impedance | 4 ohms |
| Spinorama Preference Score | 6.14 (manufacturer spinorama data) |
| Spinorama Preference Score with Perfect Sub | 8.74 (manufacturer spinorama data) |
| Woofer Cabinet | sealed, separate spherical driver modules on tripod stand |
- Links
- Reviews, Comparisons and Sound Samples