syzygySLF-850newsyzygy SLF-850 1000 watt wireless sub w/room correctionAsk us about 6 MONTHS NO PAYMENTS or INTEREST thru PayPal Underwood is happy to be selling the Syzygy line of wireless subwoofers. This ad is for the SLF-850 but we carry all 4 mod...799.00

syzygy SLF-850 1000 watt wireless sub w/room correction [Expired]

no longer for sale

     Ask us about 6 MONTHS NO PAYMENTS or INTEREST thru PayPal

  Underwood is happy to be selling the Syzygy line of wireless subwoofers. 

     This ad is for the SLF-850 but we carry all 4 models from $399-$999.

               Call to discuss all models


When three celestial bodies are perfectly aligned, it’s called syzygy. When advanced technology, high performance audio and a passion for great sound align, we call it syzygy too – Syzygy Acoustics.

                          Rooms are the real problem

Syzygy subwoofers pair seamlessly with any high-fidelity or home theater audio system to deliver clean and powerful low-frequency sound. Thanks to Syzygy's proprietary wireless technology, you can link multiple subwoofers to the same transmitter, allowing you to fill your space with deep and detailed bass, regardless of room size.The unique SoundSculpt technology measures your room and defeats room resonances to allow a seemless match to your main speakers without the typical one note bass appearing of most rooms. All controlled from your listening chair right from your phone on the Syzygy app.


Controlled from your phone

Using unique SoundSculpt Technology, each Syzygy subwoofer essentially makes a 3-D sonic map of its space, and then adjusts its output to smooth out the aural peaks and valleys. It sends out a series of tones that measure the shape and size of your room, the position of the furniture, and how your decor absorbs and reflects sound. This rich acoustical data is captured by your smartphone and sent back to the subwoofer where it is corrected then perfected, ensuring that the sub-bass from the Syzygy subwoofer blends seamlessly with your speakers and the low-frequency sound arrives at your ears at the correct time. All with a tap of an app. 

                      Multiple subs are the way to go                                       

All acoustic experts will tell you that multiple subs are the way to go. Two subs or a swarm of 4 will couple better to all rooms and help to even out room modes and allow for lower distortion along with greater dynamics. Instead of making larger models Syzygy recommends using two to 4 subs in your room and this can be done at very reasonable prices. We very much agree. Two 850 subs are the same price as a $1600.00 REL or JL and typically outperform them.

The SLF-850 is a 10 inch acoustic suspension design with a 1000 watt amp and true 24Hz performance. It can be run both front firing or down firing. In addition to wireless operation it offers line level input.

Performance is superb with vary fast transient response and the ability to keep up with fast mains like planar speakers.

At only $799.00 the SLF850 is a great value and at under $1600. two will rock even very large rooms. Four in a swarm is amazing!

The Tone Audio Review said:
"But regardless of whether you add one or two of the SLF850s to your system, fine tuned, low-frequency extension is easy and affordable. Thanks to the wireless, DSP configuration and the small form factor, I can’t think of anyone not being able to integrate at least one of these into your listening room. You’ll be glad you did. I’m adding the review samples to my Audiophile Apartment system, so you’ll be seeing and hearing more of them in reviews to come."

"Our compliments to Paul Egan and the staff at Syzygy for delivering an outstanding product at a very approachable price; earning them one of our first Exceptional Value Awards for 2017."

Read the entire review at:

In the CE Pro review they said:

"The subwoofer killed it. Articulation, depth, detail, power, control, tightness, funkiness… you get the picture. I was able to discern the warmth of Keith’s bass, just like when I was running it through the PA system. The punch of Garry Tallent’s line on “Fire” hit you in the chest. Al Green’s entire record sounded like soul records are supposed to sound, with a bottom end you could dance to. Classical music sounded exquisite, with definition."

"I could go on, but you get the picture. I have no doubt movies would have sounded fine, but for this review, I strictly used the subs for music playback."

"Doubling up the subs only made it better, providing more uniform coverage wherever you were in the room."

Read the entire review at:

Driver Size: 10" proprietary woven-cellulose-fiber diaphragm 
Type: Acoustic Suspension
Amplifier Power: 1,000 Watts
Frequency Response: 24-200 Hz
Room Output: 104 dB
Dimensions: 12.5" cube
Weight (net): 29.4 lbs
Wireless: Yes
Analog RCA In (LFE): Yes
Auto Standby: Yes Warranty: 3 years parts & labor

Read our 13,000 points of AudiogoN #1 rated feedback and then call 770-667-5633 with questions or to purchase any of the Syzygy subwoofers.

We accept PayPal, AMEX, Visa, Discover and MasterCard as well as money orders.
GA & HI residents add sales tax

Brands carried:
Acoustic Zen, April Music, Audio Space tube electronics, Audeze headphones,
Auralic Music Streamers & DAC's, Bob Carver tube amplifiers and loudspeakers, Burson Audio, Creek, DSPeaker room correction, EAT turntables, ELAC Speakers, Emerald Physics loudspeakers, amplifiers & DSP crossovers, Epos, Focal headphones, Gallo speakers, Graham Slee, HifiMan headphones, Iso-Acoustics, Jolida tube electronics, LSA speakers, Lehmann phono stages, Marantz Reference, Micromega, MOFI Turntables, MrSpeakers headphones, Musical Fidelity, Music Hall tables, Mu-So by Naim, Ortofon cartridges, Outlaw Audio, Peachtree Audio, Project turntables, PS Audio, Quad, Scansonic speakers, Silverline Audio speakers, Spread Spectrum Ampzilla amps & preamps, Sumiko cartridges, Sweet Vinyl pop & click filters, Syzygy wireless subwoofers, TriangleArt turntables,
Wireworld & Wywires cables

Sales policies on the Underwood Hifi Inc website at

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