Short answer: the Polk Audio XT30. It ranks #49 of 98 center channel speakers by sound quality, rated 3.6/5, at $139. The Micca MB42X-C G2 ranks #59, rated 3.5/5, at $89.99, $49.01 cheaper, a saving that is not big enough to make up the sound-quality gap.
Why pick the Polk Audio XT30: One of the least expensive centers here at $139, with a 1” Terylene dome tweeter between two 5.25” woofers and 89dB sensitivity. The catch: The listening window spans 3.0dB from 300Hz to 5kHz and the predicted in-room response is not very smooth (0.51), so it sounds less even off axis and in reflective rooms.
What the Micca MB42X-C G2 does well: The second generation of Micca’s budget center keeps the 0.75” silk dome tweeter and two 4” carbon fiber woofers in the same compact ported cabinet, with a reworked 12dB per octave crossover that Micca says gives a more neutral tonal balance. The catch: No independent measurements yet, so its tonal balance and directivity can’t be compared directly with measured centers; the rating is estimated from its predecessor’s measurements.
Buy the Polk Audio XT30. It is rated higher for sound quality, and the $49.01 saving on the Micca MB42X-C G2 is not enough to make up the difference.
Looking for alternatives? See the complete Passive Home rankings.
Specifications Side By Side
| Polk Audio XT30 | Micca MB42X-C G2 | |
|---|---|---|
| Price | $139.00 each | $89.99 each |
| Ranked | #49 of 98 in Center Channel Speakers | #59 of 98 in Center Channel Speakers |
| Drivers | 1” Terylene dome tweeter, 2x 5.25” bi-laminate paper woofers | 0.75” silk dome tweeter, 2x 4” carbon fiber woofers |
| Frequency Response | 77Hz-26kHz -3dB (manufacturer specified) | 55Hz-20kHz (manufacturer specified) |
| Sensitivity | 89dB (manufacturer specified) | 86dB (1W/1m, manufacturer specified) |
| Woofer Cabinet | ported (rear) | ported |
| Dimensions | 6.5”H x 19”W x 8.1”D (166 x 483 x 207 mm) | 5.3”H x 15”W x 7.1”D (135 x 381 x 180 mm) |
| Weight | 13 lbs (5.9 kg) | - |
| Bass Extension (-3dB) | 77.6Hz (measured, Erin’s Audio Corner) | - |
| Bass Extension (-10dB) | about 50.7Hz (measured, Erin’s Audio Corner) | - |
| Spinorama Preference Score | 3.89 | - |
| Spinorama Preference Score with Perfect Sub | 6.50 | - |
| DIY Kit | No | - |
| Impedance | - | 4 to 8 ohms (manufacturer specified) |
Related Speaker Comparisons
How Polk Audio XT30 compares with other leading options:
- Polk Audio XT35 vs Polk Audio XT30
- Klipsch RP-500C II vs Polk Audio XT30
- Polk Audio XT30 vs BIC America FH6-LCR
- Micca MB42X-C G2 vs Micca MB42X-C
- Polk Audio XT35 vs Polk Audio Signature Elite ES30
Prices on this page were last checked October 5, 2026 at 10:21 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.
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The Two Speakers In Full
Polk Audio XT30: $139.00 each Amazon eBay
Pros: One of the least expensive centers here at $139, with a 1” Terylene dome tweeter between two 5.25” woofers and 89dB sensitivity. Erin’s Audio Corner measured a flat on-axis response (0.26 average deviation) and deeper bass than the slimmer XT35, reaching 77.6Hz (-3dB) and about 51Hz (-10dB). Measured bass extension of 77.6Hz (-3dB).
Cons: The listening window spans 3.0dB from 300Hz to 5kHz and the predicted in-room response is not very smooth (0.51), so it sounds less even off axis and in reflective rooms. The preference score without a subwoofer is 3.89.
Full Polk Audio XT30 review and specifications →
| Bass Extension (-10dB) | about 50.7Hz (measured, Erin’s Audio Corner) |
|---|---|
| Bass Extension (-3dB) | 77.6Hz (measured, Erin’s Audio Corner) |
| DIY Kit | No |
| Dimensions | 6.5”H x 19”W x 8.1”D (166 x 483 x 207 mm) |
| Drivers | 1” Terylene dome tweeter, 2x 5.25” bi-laminate paper woofers |
| Frequency Response | 77Hz-26kHz -3dB (manufacturer specified) |
| Sensitivity | 89dB (manufacturer specified) |
| Spinorama Preference Score | 3.89 |
| Spinorama Preference Score with Perfect Sub | 6.50 |
| Weight | 13 lbs (5.9 kg) |
| Woofer Cabinet | ported (rear) |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
Micca MB42X-C G2: $89.99 each Estimated Amazon eBay
Older model: the Micca MB42X-C (ranked lower, rated 3.4/5).
Pros: The second generation of Micca’s budget center keeps the 0.75” silk dome tweeter and two 4” carbon fiber woofers in the same compact ported cabinet, with a reworked 12dB per octave crossover that Micca says gives a more neutral tonal balance. It costs $90.
Cons: No independent measurements yet, so its tonal balance and directivity can’t be compared directly with measured centers; the rating is estimated from its predecessor’s measurements. The 4” woofers limit bass, so it needs a subwoofer, and 86dB sensitivity is modest.
Full Micca MB42X-C G2 review and specifications →
| Dimensions | 5.3”H x 15”W x 7.1”D (135 x 381 x 180 mm) |
|---|---|
| Drivers | 0.75” silk dome tweeter, 2x 4” carbon fiber woofers |
| Frequency Response | 55Hz-20kHz (manufacturer specified) |
| Impedance | 4 to 8 ohms (manufacturer specified) |
| Sensitivity | 86dB (1W/1m, manufacturer specified) |
| Woofer Cabinet | ported |
- Links
- Reviews, Comparisons and Sound Samples
- No independent measurement review is linked for this model; it is ranked from hands-on listening and comparison against similarly priced speakers.
- Head-to-Head Comparisons