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PSB SubSeries 100

Ultra-compact powered subwoofer for desktop systems and more

14 Reviews | 2 questions - 3 answers

Item # 760SS100

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Our take on the PSB SubSeries 100

Shhhh, please don't tell the SubSeries 100 powered subwoofer just how tiny it thinks it's big. And when you hear it, you'll think it's big, too. That's because PSB packed an amazing amount of muscle into this ultra-compact cube. Match it with PSB's Alpha PS1 powered speakers to create a pint-sized sound system that delivers serious, big-dog sound.

Little dog with big dog attitude

Shhhh, please don't tell the SubSeries 100 powered subwoofer just how tiny it thinks it's big. And when you hear it, you'll think it's big, too. That's because PSB packed an amazing amount of muscle into this ultra-compact cube. Match it with PSB's Alpha PS1 powered speakers to create a pint-sized sound system that delivers serious, big-dog sound.

Bring your music, movies, and video games to life

PSB designed the SubSeries 100 to bring powerful bass performance to your desktop listening environment. This mighty mite even packs enough punch to fill smaller rooms. Its carefully engineered and computer-optimized 5-1/4" woofer is paired with an efficient, cool-running 50-watt Class D amplifier for tight, accurate low-frequency sound. You'll feel the rumble of explosions in your favorite Hollywood blockbusters and hear the crowds roar when you score a goal in your favorite game. It's great for music, too, like when you want to really hear the taut, tuneful sound of an upright acoustic bass from a classic jazz number.

Full-size controls and flexibility

The SubSeries 100 might be small, but it still gives you all the versatility of a full-sized subwoofer. You get an adjustable volume control, plus controls for setting the crossover frequency and inverting phase to ensure a perfect sonic match with your main speakers and your room. Rear-panel line level inputs accept both stereo preamp outputs and the mono subwoofer input from an A/V receiver or PSB's own Alpha PS1 powered speakers. The sub even comes equipped with a USB power port to charge and operate your compatible USB devices.

Due simply to its size, I was prepared to be underwhelmed by this subwoofer. Instead I am very impressed. Have it tucked into a bookcase between Canton bookshelf speakers and it contributes just the right amount of low-end bass. Couldn't be happier with it.

Anonymous, Cincinnati, OH

What's in the Box:

  • Compact powered subwoofer
  • Two 5.75' AC power cords (US/EU) Quick Start Subwoofer Guide
  • Important Safety Instructions

Product Highlights:

  • acoustic suspension (sealed) enclosure
  • 50-watt RMS amplifier
  • 5-1/4" front-firing polypropylene woofer
  • frequency response: 39-150 Hz (±3dB)
  • continuously variable 50-150 Hz crossover
  • phase switch
  • line-level stereo RCA inputs
  • unfiltered LFE (Low Frequency Effects) mode for connection to a home theater receiver's subwoofer output
  • auto on/off
  • USB power port for charging compatible USB devices
  • 6-3/8"W x 6-3/8"H x 7-7/8"D
  • warranty: 5 years woofer, 1 year electronics
  • Our 60-day money-back guarantee

PSB SubSeries 100 Reviews

Average Customer Review(s):

(14 Reviews)
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Hands-on research

Features and Specs

Enclosure Acoustic Suspension
Video Shielded No
Woofer Size (inches) 5 1/4
Woofer Composition Polypropylene
Firing Direction Front
Wireless No
Preamp-Level Inputs Yes
Speaker-Level Inputs No
Speaker-Level Outputs No
Low-Pass Crossover Freq 50-150
High-Pass Crossover Freq None
Phase Switch Yes
Amplifier Output (watts) 50
Frequency Response 39-150 Hz
Height (inches) 6-3/8
Width (inches) 6-5/16
Depth (inches) 8-11/16
Weight 6.05 lbs
Speaker Parts Warranty 5 Years
Speaker Labor Warranty 5 Years
Amplifier Parts Warranty 1 Year
Amplifier Labor Warranty 1 Year

Product Research


5.25" Woofer/50W Amp: A specially designed 5.25" long-throw polypropylene woofer is computer optimized to get the best bass extension and dynamic range without distortion. An innovative filter pole shifting technique is used to squeeze the maximum deep bass from the specially engineered driver unit. The acoustic suspension enclosure is extremely rugged and resonance-free assuring that only the desired bass frequencies are radiated into the room for clean articulate bass response. The efficient and cool running 50W (continuous) Class D amplifier is capable of 100W dynamic peak power and carefully matched to the driver. By matching the amplifier to the driver characteristics a synergy is achieved that boosts the level of performance far beyond what could be achieved otherwise.

Volume/Crossover/Phase Control: Along with adjustable volume, there are controls for setting the crossover frequency (50-150Hz) and inverting the phase (0°/180°) to facilitate a perfect and seamless integration between the full-range or satellite speakers you have partnered with the SubSeries 100 powered sub.

Note: Recommended settings for the SubSeries 100 when matched with the PSB Alpha PS1 Powered Speaker (760ALPHPS1, sold separately) are as follows - 0° phase, crossover half-way, and half volume (marked on sub). This combination creates an incredible micro-sized full range desktop system for your computer audio.

RCA/LFE Input: Line-level RCA inputs accept both stereo preamp outputs and the mono LFE channel input from an AV Receiver. Use the powered sub's Left RCA input for an LFE signal.

Auto On/Standby: When an audio signal is received by the SubSeries 100, the powered subwoofer turns on automatically. When no audio signal is detected, the sub's amplifier will automatically turn off after approximately 15 minutes.

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Q & A

Customer Q&A

Crutchfield asked  
Why did you buy this?

This subwoofer was designed to accompany my Alpha PS1 speakers. [ Brian  Mar 01, 2017 ]

2 questions already asked

The position of the sub isn't all that critical. I am using it with my home receiver and it provides plenty of bass for music and movies. It sits about 10 feet from the viewing area and there is still plenty of bass. I think under your desk will be just fine, it may need a little tweaking though to find the sweet spot. [ JOSHUA  Mar 13, 2014 ]
I have mine under a desk and it sounds great [ JONATHAN  Mar 11, 2014 ]
As far as making music, depends on your application. I'm using the PSB sub along with the PSB Alpha B1s, driven by a Meridian Explorer DAC directly from a PC. The Meridian Explorer is a fantastic DAC, plugs directly into one of my PC's USB ports, then connects to the PSB Alpha B1s via a 3.5mm to RCA interconnect (I'm using the AudioQuest Sydney interconnect). the Alpha B1s are powered speakers and sound fantastic in their own right. After I had them in place for a couple of weeks, I decided to add the PSB 100 sub. The sub itself is just great in this application, and filled out the bottom end very nicely. Understand this is a computer desktop system, and in that application the sound is very hard to beat. I've got a very high-end, dedicated two-channel system that this little desktop system rivals in terms of its musicality. I love listening to it while I work.The PSB Subseries 100 is a standard, powered sub that you feed signal to using a standard subwoofer interconnect. It is not USB powered nor can you use it in a USB application. The PSB Alpha B1s have a subwoofer out port that sends signal to the sub. So, in this application both the Alphas and the 100 sub are separately powered (standard 120V electrical connection).If you are thinking of using this sub in a dedicated two-channel set-up that's used for anything other than a desktop or very small room application, I don't think it will be a good solution, due to its diminutive size. But in my 10x13 study at home, this system works great and is amazingly musical. I think a lot of that is due to the quality of the Meridian DAC but the Sub 100 and the Alpha B1s work great together and are real winners as well.Hope this helps. [ STEVEN  Feb 01, 2014 ]

Looking for more? Check out the next model in this lineup.

PSB Subseries 125

Enjoy even deeper, more powerful bass

The PSB SubSeries 125 offers these features:

an 8" woofer for a lower frequency response down to 35 Hz

built-in 125-watt amplifier for greater bass volume in larger spaces

convenient front-mounted volume and crossover controls