Syzygy SLF-820 — 8" Powered Wireless Subwoofer
Syzygy builds the SLF-820 around an acoustic suspension design rather than a ported enclosure, and the choice matters. A sealed cabinet uses a cushion of trapped air to regulate cone travel precisely — less overshoot, tighter transient response, and bass that stops when the signal stops rather than hanging in the room a half-beat too long. The tradeoff is typically extension, but the SLF-820's 400-watt amplifier driving a proprietary woven cellulose fiber diaphragm gets it to genuine 30Hz in an 11-inch cube. 100dB output from something that size is not a given — it reflects the amplifier-to-driver match Syzygy built around the sealed alignment rather than relying on port tuning to make up for an underpowered amp. The wireless transmitter is included and supports linking multiple SLF-820s to a single source — useful for distributed bass in a larger room or a dual-sub setup without running cables across the floor. Front- or down-firing orientation. Auto standby. RCA line-level input for wired connection when preferred. The SLF-820 is the subwoofer for the room where cable management is the deciding factor and you still want real bass on the other end of the connection.
We have two available. Stock Photos
$699.00 MSRP
Due to size and weight, this item may incur an additional shipping surcharge and is listed as Store Pick Up Only. Contact us for a quote if you wish to have it Shipped.
Phone: 888-248-3246
Email: info@echohifi.com
Inquire Now
Couldn't load pickup availability
Return Policy
Return Policy
We offer a 3-day return window on all purchases. Returns made to a credit or debit card will incur a 5 percent processing fee. Shipping costs, both to and from, are the responsibility of the customer if applicable.
After the 3-day window and up to 3 weeks from the date of purchase, items may still be returned, subject to a 20 percent restocking fee.
For shipped orders, customers must notify us within 3 days of receiving the item to initiate a return. Once the item is received back in the same condition it was sent, we will issue a refund minus all shipping charges and a 5 percent credit card processing fee.
Need Help? View our services
Need Help? View our services
Syzygy builds the SLF-820 around an acoustic suspension design rather than a ported enclosure, and the choice matters. A sealed cabinet uses a cushion of trapped air to regulate cone travel precisely — less overshoot, tighter transient response, and bass that stops when the signal stops rather than hanging in the room a half-beat too long. The tradeoff is typically extension, but the SLF-820's 400-watt amplifier driving a proprietary woven cellulose fiber diaphragm gets it to genuine 30Hz in an 11-inch cube. 100dB output from something that size is not a given — it reflects the amplifier-to-driver match Syzygy built around the sealed alignment rather than relying on port tuning to make up for an underpowered amp. The wireless transmitter is included and supports linking multiple SLF-820s to a single source — useful for distributed bass in a larger room or a dual-sub setup without running cables across the floor. Front- or down-firing orientation. Auto standby. RCA line-level input for wired connection when preferred. The SLF-820 is the subwoofer for the room where cable management is the deciding factor and you still want real bass on the other end of the connection.
We have two available. Stock Photos
$699.00 MSRP
Due to size and weight, this item may incur an additional shipping surcharge and is listed as Store Pick Up Only. Contact us for a quote if you wish to have it Shipped.
Phone: 888-248-3246
Email: info@echohifi.com
Inquire Now
9/10- Great condition. Little wear on subwoofer. Box, manual and accessories included.