Short answer: the Boston Acoustics A25 for better sound quality, the Micca RB42 for the lower price. The Boston Acoustics A25 ranks #35 of 87 bookshelf speakers at $299.98. The Micca RB42 ranks #72 at $159.99, $139.99 cheaper.
What the Micca RB42 offers: Curved cabinet fit and finish look closer to a $400-500 speaker than a $150 one. Rated for a wide 15-100W amplifier range with 4-8 ohm compatibility, giving flexibility with modest amplification. Watch for: CEA2034 spinorama shows significant peaks and valleys in the on-axis and listening-window response starting a few kHz up, with excess high-frequency energy the reviewer found fatiguing over time despite an initial impression of “detail.” Off-axis response diverges heavily from on-axis, meaning tonality shifts with room and listening position in ways EQ can’t correct. Distorts and the woofer visibly flaps under moderate volume; low 83dB sensitivity makes it a harder amplifier load than its size suggests.
What the Boston Acoustics A25 offers: CEA2034 spinorama is decent once you ignore a peak around 900Hz and a dip around 3kHz - directivity is good enough that the response can be EQed and won’t be too room-dependent. Cabinet fit and finish is well above its price class, and dynamics were strong with no distortion audible even at high volume on well-recorded material. Discontinued, but the reviewer suggests hunting for clearance pricing on remaining stock. Watch for: A crazy port resonance and a tweeter with a steeper rolloff than the woofer both show up in the near-field driver measurements, creating the 900Hz peak and the crossover-region dip. The rear port itself measured audibly distorted up close, though it wasn’t noticeable from normal listening distance in the reviewer’s room.
Buy the Micca RB42 if the price matters more than sound quality. Buy the Boston Acoustics A25 if sound quality matters more than the price.
If sound quality matters at all to you, skip the Micca RB42. It ranks near the bottom of the 87 bookshelf speakers, so look higher up the list instead.
Specifications Side By Side
| Micca RB42 | Boston Acoustics A25 | |
|---|---|---|
| Price | $159.99 | $299.98 Discontinued |
| Ranked | #72 of 87 in Medium Size Bookshelf Speakers | #35 of 87 in Medium Size Bookshelf Speakers |
| Bass Extension (-3dB) | 85Hz (measured, Audio Science Review) - the reviewer noted an artificial boost around 100-300Hz, so true extension may be worse than this on-axis reading suggests | 90Hz (measured, Audio Science Review) |
| Bass Extension (-10dB) | 62Hz (measured, Audio Science Review) - the reviewer noted an artificial boost around 100-300Hz, so true extension may be worse than this on-axis reading suggests | 55Hz (measured, Audio Science Review) |
| Drivers | 4" coated paper woofer, 0.75" silk dome tweeter | 1" Kortec soft dome tweeter, 5.25" ceramic/glass-fiber polymer mid/woofer |
| Dimensions | 8.7H x 4.9W x 7.9D in | 10.7H x 7.25W x 8.9D in |
| Weight | 6 lbs / 2.7 kg each (per retailer listing) | 10.1 lbs / 4.58 kg each |
| Frequency Response | 50Hz - 20kHz (Manufacturer specified, typical in-room) | 55Hz - 25kHz (Manufacturer specified) |
| Sensitivity | 80dB (2.83V/1m, measured, Audio Science Review) | 85dB (2.83V/1m, measured, Audio Science Review) |
| Impedance | 4-8 ohms | 8 ohms nominal |
| Power Handling | 15-100W each | 10-150W recommended |
| Woofer Cabinet | ported, front | ported, rear |
| Discontinued | - | Yes |
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The Two Speakers In Full
Micca RB42: $159.99 Amazon eBay
Pros: Curved cabinet fit and finish look closer to a $400-500 speaker than a $150 one. Rated for a wide 15-100W amplifier range with 4-8 ohm compatibility, giving flexibility with modest amplification.
Cons: CEA2034 spinorama shows significant peaks and valleys in the on-axis and listening-window response starting a few kHz up, with excess high-frequency energy the reviewer found fatiguing over time despite an initial impression of “detail.” Off-axis response diverges heavily from on-axis, meaning tonality shifts with room and listening position in ways EQ can’t correct. Distorts and the woofer visibly flaps under moderate volume; low 83dB sensitivity makes it a harder amplifier load than its size suggests.
Full Micca RB42 review and specifications →
| Bass Extension (-10dB) | 62Hz (measured, Audio Science Review) - the reviewer noted an artificial boost around 100-300Hz, so true extension may be worse than this on-axis reading suggests |
|---|---|
| Bass Extension (-3dB) | 85Hz (measured, Audio Science Review) - the reviewer noted an artificial boost around 100-300Hz, so true extension may be worse than this on-axis reading suggests |
| Dimensions | 8.7H x 4.9W x 7.9D in |
| Drivers | 4" coated paper woofer, 0.75" silk dome tweeter |
| Frequency Response | 50Hz - 20kHz (Manufacturer specified, typical in-room) |
| Impedance | 4-8 ohms |
| Power Handling | 15-100W each |
| Sensitivity | 80dB (2.83V/1m, measured, Audio Science Review) |
| Weight | 6 lbs / 2.7 kg each (per retailer listing) |
| Woofer Cabinet | ported, front |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
Boston Acoustics A25: $299.98 Discontinued eBay
Pros: CEA2034 spinorama is decent once you ignore a peak around 900Hz and a dip around 3kHz - directivity is good enough that the response can be EQed and won’t be too room-dependent. Cabinet fit and finish is well above its price class, and dynamics were strong with no distortion audible even at high volume on well-recorded material. Discontinued, but the reviewer suggests hunting for clearance pricing on remaining stock.
Cons: A crazy port resonance and a tweeter with a steeper rolloff than the woofer both show up in the near-field driver measurements, creating the 900Hz peak and the crossover-region dip. The rear port itself measured audibly distorted up close, though it wasn’t noticeable from normal listening distance in the reviewer’s room. Discontinued.
Full Boston Acoustics A25 review and specifications →
| Bass Extension (-10dB) | 55Hz (measured, Audio Science Review) |
|---|---|
| Bass Extension (-3dB) | 90Hz (measured, Audio Science Review) |
| Dimensions | 10.7H x 7.25W x 8.9D in |
| Discontinued | Yes |
| Drivers | 1" Kortec soft dome tweeter, 5.25" ceramic/glass-fiber polymer mid/woofer |
| Frequency Response | 55Hz - 25kHz (Manufacturer specified) |
| Impedance | 8 ohms nominal |
| Power Handling | 10-150W recommended |
| Sensitivity | 85dB (2.83V/1m, measured, Audio Science Review) |
| Weight | 10.1 lbs / 4.58 kg each |
| Woofer Cabinet | ported, rear |
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