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Description
SA221SSynergy Active Subwoofer This powerful dual 21 inch subwoofer is the perfect low end companion to the Synergy Array series, Yorkville Sound's largest and most powerful point source system to date. The SA221S can be combined directly with an SA153 as an independent system or in combination with the SA153 and SA315S setup as a 5 way system. Features Bass Reflex powered subwoofer: 6000 Watts (program), 17,000 Watts (peak) 2 x 21 inch Neodymium woofers
Synergy Active Subwoofer
This powerful dual 21-inch subwoofer is the perfect low-end companion to the Synergy Array series, Yorkville Sound's largest and most powerful point-source system to date. The SA221S can be combined directly with an SA153 as an independent system or in combination with the SA153 and SA315S setup as a 5-way system.
Features
- Bass Reflex powered subwoofer: 6000 Watts (program), 17,000 Watts (peak)
- 2 x 21-inch Neodymium woofers with 4.5-inch voice coil
- Exceptionally high output and deep bass
- Measured MAX SPL (C-Weighted, Max Hold): 130.6dB continuous, 142.6dB peak
- Frequency response (Hz +/- 3db): 28Hz-100Hz
- Crossover frequency (Hz): 50 and 100 Hz low-pass
- Made in Canada
Specifications
| Active or Passive | Active |
| Power Rating (Watts) | 6000 Watts Program, 17000 Watts Peak |
| Measured Max SPL (C-Weighted, Max Hold) | 130.6 dB Cont. 142.6 dB Peak |
| Frequency Response (Hz +/- 3dB) | 28 - 100Hz |
| Crossover Frequency (Hz) | 50 or 100 Hz lo |
| Cabinet Configuration | Bass Reflex |
| Driver Configuration | 2x21-inch LF woofer |
| LF Driver(s) | 21-inch Neo with 4.5-inch Tetra Coil |
| LF Power Rating(Watts) | 6000 Watts Program, 17000 Watts Peak |
| LF Impedance (Ohms) | 2 amplifiers, 4 ohms per amplifier |
| LF Protection | Excursion, Voice Coil Thermal (RMS) |
| LF Power Amplifier (Watts) | 6000 Watts Program, 17000 Watts Peak |
| LF Amplifier Type | Class D |
| Cooling Scheme | Convection |
| Power Cable | Removable Locking Powercon True Input and Loop Thru Output |
| Power Switch | Yes |
| Power Consumption (typ/max) | 1440 VA / 1920 VA |
| Inputs | 1 XLR with 2x XLR Parallel out, Impedance 35k ohms |
| Input Sensitivity (Vrms Sine) | Line in 1.4 at center, 0.56 at max |
| Level Controls | Volume, -?,0dB,8dB (Min, Top, Max) |
| EQ Controls | Thermal Limiter Advance for power consumption management |
| Limiter | Excursion, Thermal (RMS), Clipping |
| LED Indicators | Power, Excursion Limit, Thermal (RMS) Limit, Input Clip, Activity |
| Enclosure Materials | Multi-ply 15mm Birch Plywood |
| Stacking Feature | Rubber Feet and Cups (Side and Bottom) |
| Covering / Finish | Paint |
| Other Details | 4 x Locking Swivel Casters On Rear Of Cabinet, 2 Stand Adapters (1 Top, 1 Side), 2 UHMW Skid Glides On Rear |
| Dimensions (DWH xbackW, inches) | 32.750 (37.750 including casters) x 29.750 x 47.5 |
| Dimensions (DWH xbackW, cm) | 83.2 (95.8 including casters) x 75.5 x 120.6 |
| Weight (lbs/kg) | 370/168 |
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.3 ★★★★★
Based on 1350 reviews
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Product Reviews
★★★★★ 5
Epic!!!!
Format: Kindle
Absolutely addicted from the first page. The twists and turns, world building and character development all come together for the perfect Omegaverse. And let's not forget that spice because knots are life and these are spectacular. Running for book #2 because that cliffhanger was torturous.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on August 17, 2024
★★★★★ 5
ABSOLUTELY A MUST for Omegaverse Girls!!!
I ABSOLUTELY LOVE Jillian West and her books!!! I’m so happy I already bought book two and now I have to buy the others for the Assurance Security series!!
Not gonna lie Val kind of annoyed me at the beginning but she grew on me!! Her men are chef’s kisses!!! Holt annoys me some but I can let it slide. I already bought part two so I’m going to be reading that in between work phone calls!!!! DON’T TELL MY BOSS 😂😂😂😂
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on September 30, 2025
★★★★★ 4
Baby bumps and bodyguards
Format: Kindle
Dark, emotional, and unexpectedly tender, Not Ready is an omegaverse romance that delivers found family feels, fierce protectiveness, and a very pregnant heroine who refuses to break. Vale’s on the run from a stalker, but lands in the arms of three private security alphas, cue the swoony tension, fake marriage twist, and slow-burn heat.
It’s a little gritty, a little soft, and a whole lot addictive. If you love protective alphas, high stakes, and heroines with quiet strength, this one’s a must-read.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 18, 2025
★★★★★ 5
Strong Omegaverse Comfort and a Attention Grabbing Plot
Format: Kindle
Jillian West never misses when it comes to Omegaverse, and Not Ready is no exception. This story was the perfect blend of cozy comfort and emotional depth while still delivering a strong plot.
Vale is such a powerful heroine, she is strong, capable, and determined but I love that she still allows her pack to love and take care of her. It’s that balance of independence and vulnerability that makes her so relatable.
The relationship dynamics were amazing: Bishop is steadfast and completely head over heels, Mercy is skeptical but protective in his own way, and Holt is the hesitant one whose slow fall is so satisfying to watch unfold.
The romance hits that sweet spot between insta-love and cautious build, keeping me hooked the entire way through. And that ending. Oh my god, the cliffhanger! I need the next book in this duet immediately.
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Reviewed in the United States on August 28, 2025
★★★★★ 5
Interesting
Format: Kindle
So I will say I enjoyed the story, for sure had its moments where it dragged but it was a great story. I really liked that omegas picked their alphas/make the pack. Normally the Alphas make it and the omega fits in with them which is great but I enjoyed this new version where all the power basically went to the omega. It was a nice change of pace. I can admit some of the weird bedroom stuff with her being pregnant was odd, it’s really not hard to do stuff when pregnant (I know I’ve had two and it’s normal and even encouraged at the end especially if you want the baby out). But I like the story as a whole and will read the second, I do hope the next one isn’t dragged bc it stopped being action or tense after she met her alphas and I don’t think it was brought up or properly done when they tried to do it. More sweet after she left.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on November 11, 2024
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