Short answer: the IK Multimedia iLoud MTM MKII. It ranks #22 of 100 powered bookshelf speakers by sound quality (rated 4.2/5); the M-Audio BX4 D3 ranks #73 (rated 3.4/5).
The IK Multimedia iLoud MTM MKII is the more accurate option. Erin’s MKII measurements give a 2.2dB midrange span, a -3dB point around 53Hz, and preference scores of 5.22 standalone and 7.44 with an ideal subwoofer. Its measured preference score, a predictor of how neutral it sounds, is 5.22 against 3.29 for the M-Audio BX4 D3. The catch: Some excess treble remains in the native tuning.
What the M-Audio BX4 D3 does well: Balanced TRS, RCA and front auxiliary/headphone connections, plus tone controls, make this a flexible inexpensive desktop pair. It keeps a wired aux input, which the IK Multimedia iLoud MTM MKII lacks. The tradeoff: A rising response of about 0.62dB per octave and listening-window deviation of 0.546 indicate bright, locally uneven reproduction.
Buy the IK Multimedia iLoud MTM MKII. It is rated higher for sound quality than the M-Audio BX4 D3.
Still deciding? The full Powered Home rankings cover every ranked option.
Specifications Side By Side
| IK Multimedia iLoud MTM MKII | M-Audio BX4 D3 | |
|---|---|---|
| Price | $699.99 per pair | - |
| Ranked | #22 of 100 in Medium Size Powered Bookshelf Speakers | #73 of 100 in Medium Size Powered Bookshelf Speakers |
| Dimensions | 10.4”H x 5.1”W x 6.3”D (264.2 x 129.5 x 160 mm) | 8.9H x 6.1W x 6.9D in |
| Frequency Response | 48 Hz - 28 kHz (±2dB) (Manufacturer specified) | 69Hz - 22kHz (Manufacturer specified) |
| Bass Extension (-3dB) | 52.7Hz (measured, Erin’s Audio Corner) | - |
| Bass Extension (-10dB) | 46.3Hz (measured, Erin’s Audio Corner) | - |
| Inputs | XLR | TRS, RCA, 3.5mm aux; headphone output |
| Drivers | 2x 3.5” (89mm) woofers, 1” silk dome tweeter | 1” dome tweeter, 4.5” Kevlar woofer |
| App | Yes (X-MONITOR speaker emulation) | - |
| Bluetooth | No | No |
| EQ | Yes (Room adjustment) | - |
| Amplifier Power | 100w Per Speaker | 120W peak system |
| Weight | 5.5 lbs (2.5 kg) each | 9.7 lbs (4.4 kg)/pair |
| Maximum SPL | 112.5dB peak (manufacturer specified) | - |
| Spinorama Preference Score | 5.22 | 3.29 |
| Spinorama Preference Score with Perfect Sub | 7.44 | 6.03 |
| XLR Input | Yes | No |
| RCA Input | No | Yes |
| TRS Input | No | Yes |
| Optical Input | No | No |
| Coaxial Input | No | No |
| USB Input | No | No |
| HDMI Input | No | No |
| AES Input | No | No |
| Aux Input | No | Yes |
| Enclosure | - | 2-way powered stereo pair, rear-ported |
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Prices on this page were last checked October 9, 2026 at 8:01 AM 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
IK Multimedia iLoud MTM MKII: $699.99 per pair Amazon eBay
Older model: the IK Multimedia iLoud MTM (ranked lower, rated 4.1/5).
Same family: the IK Multimedia iLoud Micro Monitor Pro (smaller bookshelf, estimated 4.3/5).
Pros: Erin’s MKII measurements give a 2.2dB midrange span, a -3dB point around 53Hz, and preference scores of 5.22 standalone and 7.44 with an ideal subwoofer. The compact layout and included calibration microphone suit a close desktop setup. Existing tests show useful room-peak correction and good harmonic-distortion behavior at moderate levels. Measured bass extension of 52.7Hz (-3dB).
Cons: Some excess treble remains in the native tuning. The two-woofer MTM arrangement narrows the vertical listening window, so ear height and orientation matter. Multitone distortion rises strongly when pushed toward 96dB/1m; the review favors moderate listening levels, and a subwoofer does not eliminate all midrange output limits. These are MKII results, not measurements of the original MTM. Treble runs about 3dB hot on-axis; the rear -3dB treble switch overcorrects, and about -1.5dB of external EQ works better.
Full IK Multimedia iLoud MTM MKII review and specifications →
| AES Input | No |
|---|---|
| Amplifier Power | 100w Per Speaker |
| App | Yes (X-MONITOR speaker emulation) |
| Aux Input | No |
| Bass Extension (-10dB) | 46.3Hz (measured, Erin’s Audio Corner) |
| Bass Extension (-3dB) | 52.7Hz (measured, Erin’s Audio Corner) |
| Bluetooth | No |
| Coaxial Input | No |
| Dimensions | 10.4”H x 5.1”W x 6.3”D (264.2 x 129.5 x 160 mm) |
| Drivers | 2x 3.5” (89mm) woofers, 1” silk dome tweeter |
| EQ | Yes (Room adjustment) |
| Frequency Response | 48 Hz - 28 kHz (±2dB) (Manufacturer specified) |
| HDMI Input | No |
| Inputs | XLR |
| Maximum SPL | 112.5dB peak (manufacturer specified) |
| Optical Input | No |
| RCA Input | No |
| Spinorama Preference Score | 5.22 |
| Spinorama Preference Score with Perfect Sub | 7.44 |
| TRS Input | No |
| USB Input | No |
| Weight | 5.5 lbs (2.5 kg) each |
| XLR Input | Yes |
- Links
- Reviews, Comparisons and Sound Samples
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M-Audio BX4 D3 eBay
Same family: the M-Audio BX5 D3 (larger bookshelf, ranked higher, rated 3.9/5) and the M-Audio BX8 D3 (larger bookshelf, rated 4/5).
Pros: Balanced TRS, RCA and front auxiliary/headphone connections, plus tone controls, make this a flexible inexpensive desktop pair. The third-party measurement gives scores of 3.29 standalone and 6.03 with an ideal subwoofer, with -3dB bass estimated around 67Hz.
Cons: A rising response of about 0.62dB per octave and listening-window deviation of 0.546 indicate bright, locally uneven reproduction. The compact system suits moderate nearfield use; the preference estimate does not verify high-level headroom.
Full M-Audio BX4 D3 review and specifications →
| AES Input | No |
|---|---|
| Amplifier Power | 120W peak system |
| Aux Input | Yes |
| Bluetooth | No |
| Coaxial Input | No |
| Dimensions | 8.9H x 6.1W x 6.9D in |
| Drivers | 1” dome tweeter, 4.5” Kevlar woofer |
| Enclosure | 2-way powered stereo pair, rear-ported |
| Frequency Response | 69Hz - 22kHz (Manufacturer specified) |
| HDMI Input | No |
| Inputs | TRS, RCA, 3.5mm aux; headphone output |
| Optical Input | No |
| RCA Input | Yes |
| Spinorama Preference Score | 3.29 |
| Spinorama Preference Score with Perfect Sub | 6.03 |
| TRS Input | Yes |
| USB Input | No |
| Weight | 9.7 lbs (4.4 kg)/pair |
| XLR Input | No |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons