Short answer: the Philharmonic BMR (v1). It ranks #36 of 134 bookshelf speakers by sound quality, rated 4.3/5, at $2,395; the Buchardt S400 MKII ranks #66, rated 3.8/5, and costs $2,400, so there is not much of a tradeoff to weigh.
Why pick the Philharmonic BMR (v1): Large three-way combining a Scan-Speak 7-inch paper/carbon woofer, 2.5-inch Tectonic balanced-mode midrange and RAAL 64-10 ribbon. The tradeoff: The measured 83dB sensitivity and roughly 4-ohm load demand meaningful external amplification.
Why pick the Buchardt S400 MKII: Two-way design with a 3/4” tweeter on a well-implemented aluminum waveguide (compression-driver style, letting the small tweeter cross unusually low at 1800Hz), a 6” SB Acoustics-style mid-woofer, and a tunable 5x8” passive radiator adjustable via rear weights. The tradeoff: Sounds a bit bright and slightly boosted above about 7-8kHz on-axis, even with 30° of toe-out: benefits from about 1 inch of sidewall absorption at the first reflection points to tame it.
One note: the Philharmonic BMR (v1) is discontinued, but it still ranks #36 of 134 bookshelf speakers by sound quality, ahead of most of what is still sold new, so it is worth considering used.
Buy the Philharmonic BMR (v1). It is rated higher for sound quality than the Buchardt S400 MKII 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.
Specifications Side By Side
| Philharmonic BMR (v1) | Buchardt S400 MKII | |
|---|---|---|
| Price | $2,395 per pair Discontinued | $2400 per pair Discontinued |
| Ranked | #36 of 134 in Large Size Bookshelf Speakers | #66 of 134 in Large Size Bookshelf Speakers |
| Bass Extension (-3dB) | Approximately 62Hz relative to mean (measured, Erin’s Audio Corner website) | 59Hz (measured, Erin’s Audio Corner) |
| Bass Extension (-10dB) | 37.8Hz (measured, Erin’s Audio Corner) | 40Hz (measured, Erin’s Audio Corner) |
| Sensitivity | Approximately 83dB/2.83V/1m (measured, Erin’s Audio Corner) | 84.7dB (measured, Erin’s Audio Corner; 87dB manufacturer specified) |
| Impedance | Approximately 4 ohms nominal (measured, Erin’s Audio Corner) | 4 ohms nominal, 3 ohms minimum (measured, Erin’s Audio Corner) |
| Drivers | RAAL 64-10 ribbon; 2.5” BMR midrange; 7” Scan-Speak woofer | 6.5” aluminum cone woofer, 1” soft dome tweeter |
| Port Tuning | Mid/low-30Hz range (measured, Erin’s Audio Corner) | - |
| Woofer Cabinet | ported | ported |
| Spinorama Preference Score | 4.86 | 5.38 |
| Spinorama Preference Score with Perfect Sub | 7.17 | 7.46 |
| Dimensions | 22H x 9W x 13.5D in | 14.4”H x 7”W x 11”D (365.8 x 177.8 x 279.4 mm) |
| Weight | 37.9 lbs (17.2 kg) each | 16.5 lbs (7.5 kg) each |
| DIY Kit | No | No |
Related Speaker Comparisons
How Philharmonic BMR (v1) compares with other leading options:
- Philharmonic BMR (v1) vs Perlisten S4b
- KEF Reference 1 Meta vs Philharmonic BMR (v1)
- Philharmonic BMR (v1) vs GR-Research NX-Studio
- AsciLab C6B vs Philharmonic BMR (v1)
- Audio First Cadentia 3 vs Philharmonic BMR (v1)
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The Two Speakers In Full
Philharmonic BMR (v1): $2,395 per pair Discontinued eBay
Newer model: the Philharmonic BMR Monitor, ranked lower, rated 3.6/5.
Pros: Large three-way combining a Scan-Speak 7-inch paper/carbon woofer, 2.5-inch Tectonic balanced-mode midrange and RAAL 64-10 ribbon. Erin measured approximately +/-1.5dB linearity from 80Hz upward, very broad +/-40-degree-or-better horizontal coverage and about 83dB/2.83V/1m sensitivity. The port is tuned in the mid/low-30Hz region without audible chuffing, the midrange provides unusually expansive staging, and distortion remained subjectively unobtrusive. Measured bass extension of 62Hz (-3dB), with a measured sensitivity of 83dB.
Cons: The measured 83dB sensitivity and roughly 4-ohm load demand meaningful external amplification. A 1-2dB shelf below about 300Hz reduces warmth unless corrected, while a response/impedance feature near 250-300Hz corresponded with Erin’s sense of resonance. The ribbon produces narrower vertical than horizontal radiation, and second-order high-frequency distortion plus dynamic enhancement near 3kHz appeared in testing. This was an earlier cabinet/version, not the current v2. Discontinued.
Full Philharmonic BMR (v1) review and specifications →
| Bass Extension (-10dB) | 37.8Hz (measured, Erin’s Audio Corner) |
|---|---|
| Bass Extension (-3dB) | Approximately 62Hz relative to mean (measured, Erin’s Audio Corner website) |
| DIY Kit | No |
| Dimensions | 22H x 9W x 13.5D in |
| Drivers | RAAL 64-10 ribbon; 2.5” BMR midrange; 7” Scan-Speak woofer |
| Impedance | Approximately 4 ohms nominal (measured, Erin’s Audio Corner) |
| Port Tuning | Mid/low-30Hz range (measured, Erin’s Audio Corner) |
| Sensitivity | Approximately 83dB/2.83V/1m (measured, Erin’s Audio Corner) |
| Spinorama Preference Score | 4.86 |
| Spinorama Preference Score with Perfect Sub | 7.17 |
| Weight | 37.9 lbs (17.2 kg) each |
| Woofer Cabinet | ported |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
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Buchardt S400 MKII: $2400 per pair Discontinued Buchardt Audio eBay
Newer model: the Buchardt S400 MK3. It’s likely to perform similarly, though we can’t confirm that yet.
Pros: Two-way design with a 3/4” tweeter on a well-implemented aluminum waveguide (compression-driver style, letting the small tweeter cross unusually low at 1800Hz), a 6” SB Acoustics-style mid-woofer, and a tunable 5x8” passive radiator adjustable via rear weights. Exceptionally flat on-axis linearity, within about ±2dB from 80Hz to 16kHz. Wide horizontal radiation for a waveguided design (about ±45-50°), notably broader than a comparable narrow-waveguide rival like the Klipsch Sevens (~±30°). Well-focused, precise imaging, aided by tight pair matching between the two speakers. Takes very well to EQ correction, letting listeners easily dial in the top end or add midrange fullness to taste. Bass extension reaches a genuine 50Hz in-room from a mellow, well-tuned rolloff rather than an artificially boosted one. Measured bass extension of 59Hz (-3dB), with a measured sensitivity of 84.7dB.
Cons: Sounds a bit bright and slightly boosted above about 7-8kHz on-axis, even with 30° of toe-out: benefits from about 1 inch of sidewall absorption at the first reflection points to tame it. A mild dullness noted especially on male vocals, alongside a small dip around 300-600Hz. Vertical positioning is critical and unusually “temperamental”: sitting even slightly toward the tweeter line causes a suckout, while sitting above it adds too much energy; not well suited to multi-height home theater seating. Distortion is fine at 86dB but runs into real issues by 96dB: not a high-output speaker. Some compression-related enhancement appears around 1.2kHz (crossover-region interaction), and the tweeter shows clear compression at 102dB. The woofer can bottom out at extreme low-frequency content played very loud; crossing to a subwoofer below 60Hz caused output problems at high volume, while 80-100Hz worked well. A subwoofer isn’t strictly required to protect the speaker at moderate listening levels (80-85dB at 3 meters), but is still recommended for genuine low-octave extension. Discontinued.
Full Buchardt S400 MKII review and specifications →
| Bass Extension (-10dB) | 40Hz (measured, Erin’s Audio Corner) |
|---|---|
| Bass Extension (-3dB) | 59Hz (measured, Erin’s Audio Corner) |
| DIY Kit | No |
| Dimensions | 14.4”H x 7”W x 11”D (365.8 x 177.8 x 279.4 mm) |
| Drivers | 6.5” aluminum cone woofer, 1” soft dome tweeter |
| Impedance | 4 ohms nominal, 3 ohms minimum (measured, Erin’s Audio Corner) |
| Sensitivity | 84.7dB (measured, Erin’s Audio Corner; 87dB manufacturer specified) |
| Spinorama Preference Score | 5.38 |
| Spinorama Preference Score with Perfect Sub | 7.46 |
| Weight | 16.5 lbs (7.5 kg) each |
| Woofer Cabinet | ported |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
- Buchardt S400 MKII vs Klipsch RP-600M II
- Buchardt S400 MKII vs ELAC DBR62
- Buchardt S400 MKII vs Dynaudio Emit 20
- Buchardt S400 MKII vs Philharmonic BMR Monitor
- Buchardt S400 MKII vs Dynaudio Special Forty
- Buchardt S400 MKII vs ELAC Debut 3.0 DB63
- Buchardt S400 MKII vs KEF Q3 Meta
- Buchardt S400 MKII vs Sonus Faber Lumina II
- See all 18 comparisons