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The Micca COVO-S Compact is the only one of the three with a consistent listed size, at 5.1 inches deep, 4.2 inches wide and 5.1 inches high. The RIOWOIS listing gives two conflicting sets of dimensions, and the Saiyin’s listed size cannot fit its 3.5-inch woofer, so their footprints are not reliable. All three are passive and need an amplifier or receiver. The Saiyin lists the lowest bass figure, 60Hz, against 90Hz for the Micca, and the RIOWOIS gives no frequency figure. Specifications come from Amazon listing data checked October 3, 2026, and we have not tested these products.
Quick compare: the products in this guide
Sizes come from the Amazon listings as we read them; check the product page for the current details before you buy.
| Product | Listed details | Link |
|---|---|---|
| Saiyin 2-Way Passive Bookshelf Speakers 60Hz Bass | not usable; item weight 3.12 kg | See details on Amazon Affiliate link |
| Micca COVO-S Compact 2-Way Passive Bookshelf Speakers, Stereo Pair, Black | 5.1″D x 4.2″W x 5.1″H; item weight 2000 g | See details on Amazon Affiliate link |
| RIOWOIS Passive Bookshelf Speakers for Home Theater Surround Sound, Satellite… | 6.6*4.7*4.3 inch | See details on Amazon Affiliate link |
Three options at a glance
| Pick | Listed dimensions | Floor footprint | Footprint rank | Buy |
|---|---|---|---|---|
| Saiyin 2-Way Passive Bookshelf Speakers 60Hz | not usable | not comparable | Not comparable | View on Amazon |
| Micca COVO-S Compact 2-Way Passive Bookshelf | 5.1″ D × 4.2″ W × 5.1″ H | 21.42 sq in (0.15 sq ft) | Smaller comparable | View on Amazon |
| RIOWOIS Passive Bookshelf Speakers for Home | 9.69″ D × 7.6″ W × 6.22″ H | 73.64 sq in (0.51 sq ft) | Larger comparable |
1. Saiyin 2-Way Passive Bookshelf Speakers 60Hz Bass — Footprint not comparable
Listed details: dimensions not usable; item weight 3.12 kg; color Black.
The Saiyin is a set of 2-way passive bookshelf speakers in black, with a 3.5-inch woofer the listing says gives bass down to 60Hz. The listing states 30W × 2 peak output and an item weight of 3.12 kg. Passive means it needs an external amplifier, which the listing says is not included, and it also says there is no Bluetooth and no speaker wire included. The listed dimensions cannot be right for a speaker with a 3.5-inch woofer, so treat the size as unverified and check the product page before placing it on a shelf.
Pros
- The listing gives the lowest bass figure of the three: down to 60Hz from a 3.5-inch woofer.
- It states a power figure of 30W × 2 peak.
- The listing is upfront that an external amplifier is needed and that Bluetooth and speaker wire are not included.
Cons
- The listed size cannot hold a 3.5-inch woofer, so the footprint should not be trusted or used to rank it.
- It needs an external amplifier that is not included, and no speaker wire comes with it.
- The 3.12 kg weight does not say whether it covers one speaker or both, and the 30W figure is a peak rating.
Who it is for / who should skip it: Pick it if the lowest listed bass limit matters most and you already own an amplifier and wire. Skip it if you need to know the real shelf size before buying.
2. Micca COVO-S Compact 2-Way Passive Bookshelf Speakers, Stereo Pair, Black — Smaller comparable footprint
Listed details: dimensions 5.1″ D × 4.2″ W × 5.1″ H; item weight 2000 g; color Black.
The Micca COVO-S is sold as a stereo pair of compact 2-way passive speakers in black. The listing gives 5.1 in deep, 4.2 in wide and 5.1 in high, which is 0.15 sq ft. Each speaker has a 3-inch wool fiber woofer in a ported enclosure, with bass extension down to 90Hz, and a concentric 0.75-inch PEI tweeter. The listing warns that it needs an amplifier or home theater receiver and cannot connect directly to a source such as a turntable. It lists a weight of 2000 g without saying whether that covers one speaker or both. The dimensions are labeled in the listing.
Pros
- The size is stated with a consistent set of dimensions: 5.1 × 4.2 × 5.1 in.
- The listing gives specific driver details: a 3-inch wool fiber woofer in a ported enclosure and a 0.75-inch concentric PEI tweeter.
- The listing explains clearly what it needs: an amplifier or home theater receiver.
Cons
- The bass limit is listed as 90Hz, 30Hz higher than the Saiyin’s 60Hz (90 − 60).
- The 2000 g weight does not say whether it is per speaker or for the pair.
- Passive only: the listing says it cannot be connected directly to a turntable or similar source.
Who it is for / who should skip it: Pick it if you want the best-documented size and driver details and have an amplifier or receiver. Skip it if you want the lowest listed bass limit.
3. RIOWOIS Passive Bookshelf Speakers for Home Theater Surround Sound, Satellite Stereo Speakers with Crisper Sound and Classic Wood Grain for Record Player/Computer/TV, Wall Mountable, One Pair. — Larger comparable footprint
Listed details: dimensions 9.69″ D × 7.6″ W × 6.22″ H; color Black.
The RIOWOIS passive bookshelf speakers are black with a 3D wood grain appearance, a 2.75-inch woofer and a 2-inch tweeter. The package includes wall-mounted accessories, per the listing. The size data conflicts: the dimensions field says 9.69 in deep, 7.6 in wide and 6.22 in high, while a bullet gives 4.3 in length and 6.6 in height. Because of that conflict, do not rely on the 0.51 sq ft footprint and verify the size on the product page. The listing is titled for home theater surround sound and satellite use. It lists no item weight.
Pros
- The listing says the package includes wall-mounted accessories.
- It names both drivers: a 2.75-inch woofer and a 2-inch tweeter.
- The wood grain appearance may suit a living room better than a plain box, per the listing’s 3D wood grain description.
Cons
- The dimensions field (9.69 × 7.6 × 6.22 in) conflicts with the bullet (4.3 in length, 6.6 in height), so the real size is unclear.
- The listing gives no bass-limit frequency and no item weight.
- The title points to satellite and surround use, so it may not be meant as a main stereo pair.
Who it is for / who should skip it: Pick it if you want wall-mount hardware included and will verify the size first. Skip it if you need a confirmed shelf footprint or a stated bass limit.
What to check before buying 2 way bookshelf speakers
All three of these speakers are passive, so the first rule is that you need an amplifier or receiver. The Saiyin and Micca listings say so explicitly, and the Saiyin adds that no Bluetooth and no speaker wire are included. The RIOWOIS is titled passive too, but the data we have gives no amplifier details, so confirm what it needs. Second, compare the low-frequency limit. The Saiyin lists bass down to 60Hz from a 3.5-inch woofer, the Micca lists usable bass down to 90Hz from a 3-inch woofer, and the RIOWOIS lists a 2.75-inch woofer without a frequency figure. The gap between 60Hz and 90Hz is 30Hz, in the Saiyin’s favor on paper. Third, verify the size. The Saiyin’s listed size cannot hold a 3.5-inch woofer, and the RIOWOIS gives two conflicting sets of numbers, so only the Micca has a consistent size: 5.1 × 4.2 × 5.1 in, or 0.15 sq ft. Do not rank the Saiyin or RIOWOIS by footprint. Fourth, check mounting. The RIOWOIS package includes wall-mounted accessories, and the other two listings do not mention any. Fifth, check power. The Saiyin states 30W × 2 peak, and a peak rating is not a continuous one, so compare it with your amplifier’s output. Pick the RIOWOIS if you want to wall-mount and will verify the size and amplifier match first. Measure your shelf depth against the speaker depth you confirm.
Worked example: fit math for these three options
This worked example is our own planning arithmetic from the listed dimensions, not test results. The wall length and walkway width are assumed example values; replace them with your measurements.
Wall example. Assume 24 inches of clear wall.
- Micca COVO-S Compact 2-Way Passive Bookshelf: 24 − 4.2 = 19.8 inches spare; centred, 9.9 inches on each side before trim, plugs or curtains.
- RIOWOIS Passive Bookshelf Speakers for Home: 24 − 7.6 = 16.4 inches spare; centred, 8.2 inches on each side before trim, plugs or curtains.
Footprint. Depth × width, converted at 144 square inches per square foot:
- Micca COVO-S Compact 2-Way Passive Bookshelf: 5.1 × 4.2 = 21.42 sq in, or 0.15 sq ft.
- RIOWOIS Passive Bookshelf Speakers for Home: 9.69 × 7.6 = 73.64 sq in, or 0.51 sq ft.
Mistakes to avoid
- Buying passive speakers without an amplifier. All three need one. The Saiyin listing also says no Bluetooth and no speaker wire are included, so budget for both.
- Trusting the Saiyin’s listed size. A 3.5-inch woofer cannot fit the listed dimensions, so the figures look wrong. Check the product page before planning a shelf.
- Ignoring the RIOWOIS size conflict. The dimensions field says 9.69 × 7.6 × 6.22 in, but a bullet says 4.3 in length and 6.6 in height. Resolve that before you measure a bookshelf.
- Reading weight as a pair or a single. The Saiyin (3.12 kg) and Micca (2000 g) listings do not say whether the weight is for one speaker or both.
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Frequently asked questions
Do I need an amplifier for these speakers?
Yes. The Saiyin and Micca listings both state they are passive and need an external amplifier or receiver, and the Micca says it cannot connect directly to a turntable or similar source. The RIOWOIS is titled passive as well, so plan on an amplifier for all three.
Which one lists the lowest bass?
The Saiyin lists bass down to 60Hz from a 3.5-inch woofer. The Micca lists usable bass extension down to 90Hz from a 3-inch woofer. The RIOWOIS lists a 2.75-inch woofer but no frequency figure. The difference between the first two is 30Hz.
Which speakers have reliable size data?
Only the Micca does: 5.1 in deep, 4.2 in wide and 5.1 in high. The Saiyin’s listed size cannot fit its 3.5-inch woofer, and the RIOWOIS lists two conflicting sets of numbers. Verify both on the product page before measuring a shelf.
Can any of them be wall-mounted?
The RIOWOIS listing says its package includes wall-mounted accessories. The Saiyin and Micca listings in the listing data do not mention wall-mount hardware. If you want to mount them, confirm with the seller first.
Products worth checking
We have not tested these products. Sizes and features come from the Amazon listings as we read them; where a listing does not say, we say so.
Micca COVO-S Compact 2-Way Passive Bookshelf Speakers, Stereo Pair, Black
See details on Amazon Affiliate linkRIOWOIS Passive Bookshelf Speakers for Home Theater Surround Sound, Satellite Stereo Speakers with Crisper Sound and Classic Wood Grain for Record Player/Computer/TV, Wall Mountable, One Pair.
See details on Amazon Affiliate linkSources checked
- US Access Board guide to clear width
- Amazon listing for Saiyin 2-Way Passive Bookshelf Speakers 60Hz Bass
- Amazon listing for Micca COVO-S Compact 2-Way Passive Bookshelf Speakers, Stereo Pair, Black
- Amazon listing for RIOWOIS Passive Bookshelf Speakers for Home Theater Surround Sound, Satellite Stereo Speakers with Crisper Sound and Classic Wood Grain for Record Player/Computer/TV, Wall Mountable, One Pair.
Specifications come from the Amazon listings as we read them for this guide. Product details and availability can change, so confirm on the product page before you buy.
