Short answer: the IK Multimedia iLoud MTM MKII. It ranks #17 of 68 powered bookshelf speakers by sound quality, rated 4.2/5, at $799.99. The Audioengine HD4 ranks #59, rated 3.2/5, at $429, $370.99 cheaper, not enough of a saving to outweigh the sound-quality gap.
What the IK Multimedia iLoud MTM MKII does well: 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 catch: Some excess treble remains in the native tuning.
Why pick the Audioengine HD4: Compact powered cabinets, analog input options and RCA output can simplify a desktop stereo system. The catch: The compact cabinets suit close desktop listening rather than a large-room system.
Buy the IK Multimedia iLoud MTM MKII. It is rated higher for sound quality, and the $370.99 saving on the Audioengine HD4 is not enough to make up the difference.
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Specifications Side By Side
| IK Multimedia iLoud MTM MKII | Audioengine HD4 | |
|---|---|---|
| Price | $799.99 per pair | $429.00 per pair |
| Ranked | #17 of 68 in Medium Size Powered Bookshelf Speakers | #59 of 68 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) | 9”H x 5.5”W x 6.5”D (228.6 x 139.7 x 165.1 mm) |
| Frequency Response | 48 Hz - 28 kHz (±2dB) (Manufacturer specified) | 60 Hz-20 kHz (-3dB) (Manufacturer specified) |
| Bass Extension (-3dB) | 52.7Hz (measured, Erin’s Audio Corner) | - |
| Bass Extension (-10dB) | 46.3Hz (measured, Erin’s Audio Corner) | - |
| Inputs | XLR | Bluetooth, Aux, RCA Input |
| Drivers | 2x 3.5” (89mm) woofers, 1” silk dome tweeter | 4” (102mm) woofer |
| App | Yes (X-MONITOR speaker emulation) | No |
| Bluetooth | No | Yes |
| EQ | Yes (Room adjustment) | No |
| Amplifier Power | 100w Per Speaker | 50w RMS Per Speaker |
| Weight | 5.5 lbs (2.5 kg) each | 7.3 lbs (3.3 kg) |
| Maximum SPL | 112.5dB peak (manufacturer specified) | - |
| Spinorama Preference Score | 5.22 | - |
| Spinorama Preference Score with Perfect Sub | 7.44 | - |
| XLR Input | Yes | No |
| RCA Input | No | Yes |
| TRS Input | No | No |
| Optical Input | No | No |
| Coaxial Input | No | No |
| USB Input | No | No |
| HDMI Input | No | No |
| AES Input | No | No |
| Aux Input | No | Yes |
| Outputs | - | RCA variable output (subwoofer) |
| Bluetooth Codecs | - | SBC, AAC, aptX, aptX HD |
| Subwoofer Output | - | Yes |
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Prices on this page were last checked September 30, 2026 at 2:57 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
IK Multimedia iLoud MTM MKII: $799.99 per pair Amazon eBay
Older model: the IK Multimedia iLoud MTM (ranked lower, rated 4.1/5).
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
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Audioengine HD4: $429.00 per pair Amazon eBay
Pros: Compact powered cabinets, analog input options and RCA output can simplify a desktop stereo system. Its modest footprint is useful where larger studio monitors are impractical.
Cons: The compact cabinets suit close desktop listening rather than a large-room system. A separate subwoofer adds cost and space if deeper bass is a priority.
Full Audioengine HD4 review and specifications →
| AES Input | No |
|---|---|
| Amplifier Power | 50w RMS Per Speaker |
| App | No |
| Aux Input | Yes |
| Bluetooth | Yes |
| Bluetooth Codecs | SBC, AAC, aptX, aptX HD |
| Coaxial Input | No |
| Dimensions | 9”H x 5.5”W x 6.5”D (228.6 x 139.7 x 165.1 mm) |
| Drivers | 4” (102mm) woofer |
| EQ | No |
| Frequency Response | 60 Hz-20 kHz (-3dB) (Manufacturer specified) |
| HDMI Input | No |
| Inputs | Bluetooth, Aux, RCA Input |
| Optical Input | No |
| Outputs | RCA variable output (subwoofer) |
| RCA Input | Yes |
| Subwoofer Output | Yes |
| TRS Input | No |
| USB Input | No |
| Weight | 7.3 lbs (3.3 kg) |
| XLR Input | No |
- Links
- Reviews, Comparisons and Sound Samples
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