Short answer: the XMechanik Mechano23 DIY. It ranks #6 of 87 bookshelf speakers by sound quality at $48; the Monitor Audio Silver 50 7G ranks #14 and costs $799, so there is not much of a tradeoff to weigh.
What the XMechanik Mechano23 DIY offers: The bass alignment is unusually well damped, with a measured Q of 0.336, among the lowest of any speaker in this catalog, so the -3dB point at 77.6Hz rolls off cleanly instead of building into a resonant bump the way many small ported designs do. On axis deviation measures a tight 0.195dB average, and Audio Science Review’s independent Klippel NFS review called the predicted in room response nearly perfect, with directivity matching that beats some commercial designs costing many times more, all from about $200 in parts. Watch for: This is a true DIY project. There is no assembled unit to buy, drivers come from Madisound, the crossover kit comes separately from EZ Speaker Solutions, and the birch plywood cabinet has to be built and finished by hand. Listening window smoothness measures a moderate 0.47 and the sound power directivity index has more variation (standard deviation 4.02) than the tightest speakers in this catalog, so off axis energy isn’t quite as evenly controlled as the excellent on axis figures suggest.
What the Monitor Audio Silver 50 7G offers: The 7th generation C-CAM Gold Dome tweeter with UD Waveguide II and RST II mid bass driver produce a listening window smoothness score of 0.50 at an accessible price, earning a Hi-Fi News Outstanding Product Award. A HiVe II reflex port system is tuned to 58Hz for real bass weight from a compact 5.25 inch two way. Watch for: The on axis response trends noticeably upward toward the treble (measured slope +0.50 per octave, the steepest of any speaker in this batch), which can read as bright on already bright recordings. The sound power directivity index also has the widest standard deviation in this batch, 3.95, meaning off axis energy tracks the on axis response less consistently than the rest of this group. Bass extension is limited to a measured 87.9Hz at -3dB, so a subwoofer is recommended for full range use, and minimum impedance dips to 3.9 ohms at 250Hz.
Buy the XMechanik Mechano23 DIY. It ranks higher for sound quality than the Monitor Audio Silver 50 7G and costs less, so the other one has nothing left to offer.
Want more options? Browse the full Passive Home rankings.
Specifications Side By Side
| XMechanik Mechano23 DIY | Monitor Audio Silver 50 7G | |
|---|---|---|
| Price | $200 per pair DIY parts | $799 per pair |
| Ranked | #6 of 87 in Medium Size Bookshelf Speakers | #14 of 87 in Medium Size Bookshelf Speakers |
| Enclosure | ported | ported |
| Drivers | Scan-Speak Discovery H2606/9200 1" horn loaded textile dome tweeter, SB Acoustics SB13PFCR25-4 5" fiber cone woofer | 1" C-CAM Gold Dome tweeter, 5.25" C-CAM RST II mid bass driver |
| Dimensions | 11.4"H x 6.9"W x 10.4"D (290 x 174 x 263 mm) | 11.1"H x 6.5"W x 10.7"D (282 x 165 x 272 mm) |
| Sensitivity | 85.1dB @ 2.83V/1m (measured, Audio Science Review) | 86dB @ 2.83V/1m |
| Bass Extension (-3dB) | 77.6Hz (measured, Audio Science Review) | 87.9Hz (measured, Erin's Audio Corner) |
| Bass Extension (-10dB) | 42.4Hz (measured, Audio Science Review) | 50.7Hz (measured, Erin's Audio Corner) |
| Port Tuning | Approximately 45Hz | 58Hz |
| Cabinet Material | 18mm Baltic birch plywood | - |
| Country | Design origin: United States (ASR forum); assembled by buyer | China |
| Spinorama Preference Score | 4.70 | 4.52 |
| Spinorama Preference Score with Perfect Sub | 7.16 | 7.13 |
| Weight | - | 12.3 lbs (5.6 kg) each |
| Impedance | - | 8 ohms nominal, 3.9 ohms minimum |
| Crossover Frequency | - | 2.6kHz |
| Power Handling | - | 100W RMS handling, 40-100W recommended amplifier power |
| Warranty | - | Lifetime, parts and labor |
| Maximum SPL | - | 104dB (manufacturer specified) |
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Prices on this page were last checked September 16, 2026 at 12:41 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
XMechanik Mechano23 DIY: $200 per pair DIY parts Madisound (Tweeter) Madisound (Woofer) eBay
Pros: The bass alignment is unusually well damped, with a measured Q of 0.336, among the lowest of any speaker in this catalog, so the -3dB point at 77.6Hz rolls off cleanly instead of building into a resonant bump the way many small ported designs do. On axis deviation measures a tight 0.195dB average, and Audio Science Review’s independent Klippel NFS review called the predicted in room response nearly perfect, with directivity matching that beats some commercial designs costing many times more, all from about $200 in parts. Measured bass extension of 77.6Hz (-3dB), with a measured sensitivity of 85.1dB.
Cons: This is a true DIY project. There is no assembled unit to buy, drivers come from Madisound, the crossover kit comes separately from EZ Speaker Solutions, and the birch plywood cabinet has to be built and finished by hand. Listening window smoothness measures a moderate 0.47 and the sound power directivity index has more variation (standard deviation 4.02) than the tightest speakers in this catalog, so off axis energy isn’t quite as evenly controlled as the excellent on axis figures suggest.
Full XMechanik Mechano23 DIY review and specifications →
| Bass Extension (-10dB) | 42.4Hz (measured, Audio Science Review) |
|---|---|
| Bass Extension (-3dB) | 77.6Hz (measured, Audio Science Review) |
| Cabinet Material | 18mm Baltic birch plywood |
| Country | Design origin: United States (ASR forum); assembled by buyer |
| Dimensions | 11.4"H x 6.9"W x 10.4"D (290 x 174 x 263 mm) |
| Drivers | Scan-Speak Discovery H2606/9200 1" horn loaded textile dome tweeter, SB Acoustics SB13PFCR25-4 5" fiber cone woofer |
| Enclosure | ported |
| Port Tuning | Approximately 45Hz |
| Sensitivity | 85.1dB @ 2.83V/1m (measured, Audio Science Review) |
| Spinorama Preference Score | 4.70 |
| Spinorama Preference Score with Perfect Sub | 7.16 |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
- XMechanik Mechano23 DIY vs Ascend Acoustics HTM-200SE2
- XMechanik Mechano23 DIY vs Arendal 1961 Monitor
- XMechanik Mechano23 DIY vs KEF LS50 Meta
- XMechanik Mechano23 DIY vs Ascend Sierra 1 v2
- XMechanik Mechano23 DIY vs Philharmonic Ceramic Mini
- XMechanik Mechano23 DIY vs Ascend Acoustics Luna V2 Mini-Monitor Titan
- XMechanik Mechano23 DIY vs Aalto Speakers Aalto 1 EVO
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Monitor Audio Silver 50 7G: $799 per pair Crutchfield eBay
Pros: The 7th generation C-CAM Gold Dome tweeter with UD Waveguide II and RST II mid bass driver produce a listening window smoothness score of 0.50 at an accessible price, earning a Hi-Fi News Outstanding Product Award. A HiVe II reflex port system is tuned to 58Hz for real bass weight from a compact 5.25 inch two way. Measured bass extension of 87.9Hz (-3dB).
Cons: The on axis response trends noticeably upward toward the treble (measured slope +0.50 per octave, the steepest of any speaker in this batch), which can read as bright on already bright recordings. The sound power directivity index also has the widest standard deviation in this batch, 3.95, meaning off axis energy tracks the on axis response less consistently than the rest of this group. Bass extension is limited to a measured 87.9Hz at -3dB, so a subwoofer is recommended for full range use, and minimum impedance dips to 3.9 ohms at 250Hz.
Full Monitor Audio Silver 50 7G review and specifications →
| Bass Extension (-10dB) | 50.7Hz (measured, Erin's Audio Corner) |
|---|---|
| Bass Extension (-3dB) | 87.9Hz (measured, Erin's Audio Corner) |
| Country | China |
| Crossover Frequency | 2.6kHz |
| Dimensions | 11.1"H x 6.5"W x 10.7"D (282 x 165 x 272 mm) |
| Drivers | 1" C-CAM Gold Dome tweeter, 5.25" C-CAM RST II mid bass driver |
| Enclosure | ported |
| Impedance | 8 ohms nominal, 3.9 ohms minimum |
| Maximum SPL | 104dB (manufacturer specified) |
| Port Tuning | 58Hz |
| Power Handling | 100W RMS handling, 40-100W recommended amplifier power |
| Sensitivity | 86dB @ 2.83V/1m |
| Spinorama Preference Score | 4.52 |
| Spinorama Preference Score with Perfect Sub | 7.13 |
| Warranty | Lifetime, parts and labor |
| Weight | 12.3 lbs (5.6 kg) each |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
- Monitor Audio Silver 50 7G vs Revel M105
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