PSB Alpha PS1/SubSeries 100

Compact powered speakers and subwoofer

Item #: 760APS1SUB

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PSB brings rich 2.1 stereo sound to your desktop

The compact PSB Alpha PS1 powered speaker system and SubSeries 100 powered subwoofer can fit on even the most space-challenged desks and bring your music to life with surprising punch. To be honest, we're not really too surprised. PSB conducts rigorous testing and research at Canada's National Research Council to ensure all their speakers deliver outstanding performance in the real world. No tricks here, just solid, thoughtful engineering for refined, true-to-life sound. Add in the beautiful high-gloss finish, and you have a speaker system that's ready to impress your eyes and ears.

PSB Alpha PS1 powered speakers

Turn your workspace into a concert hall

Despite a tiny footprint, the PS1/SubSeries 100 package has enough power to fill a small- to medium-sized room with robust, detailed sound. Each speaker in the stereo pair features a 3-1/2" metalized polypropylene woofer and 3/4" aluminum dome tweeter designed to maximize your ideal listening "sweet spot." This allows the Alpha PS1s to "disappear" while projecting a large and detailed soundstage. And the speakers' rounded shape offers a stylish look for your desktop.

Quick and simple set up

Hooking up this system is easy and straightforward. RCA and minijack inputs let you listen to music from your computer or a portable player, like an iPod®, or another audio source. An included cable connects the two PS1s together, allowing the 2 x 20-watt amplifier built into the left speaker to power both. There's a dedicated subwoofer output on the left speaker for connecting the SubSeries 100. (Be sure to pick up a subwoofer cable, not included.)

Compact sub makes noise like the big boys

PSB packed an amazing amount of muscle into the ultra-compact SubSeries 100. With frequency response down to 39 Hz and an adjustable crossover, it works seamlessly with the PS1 speakers to create a pint-sized sound system that delivers serious, big-dog sound.

The sub's 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.


  • bundle includes one pair of PS1 powered speakers and one SubSeries 100 powered subwoofer
  • rear USB power outputs on left speaker and subwoofer allow you to charge connected devices (does not support audio transfer)
  • system frequency response: 39-22,000 Hz (±3dB)
  • warranty: 5 years speakers, 1 year amplifier
  • Our 60-day money-back guarantee
PS1 powered multimedia stereo speakers:
  • two 20-watt RMS amplifiers built into left speaker
  • frequency response: 80-22,000 Hz (±3dB)
  • each speaker features:
    • one 3/4" aluminum dome tweeter
    • one 3-1/2" metalized poly cone woofer
    • acoustically engineered ABS cabinet with UV coating
  • rear-mounted volume control
  • rear-panel minijack input for connecting an audio source
  • rear RCA stereo line-level input
  • left RCA port provides LFE mono subwoofer line output
  • outboard power supply and power cord included
  • 4-1/2"W x 7-11/16"H x 7-9/16"D (each)
SubSeries 100 compact powered subwoofer:
  • acoustic suspension (sealed) enclosure
  • 50-watt RMS subwoofer amplifier
  • long-throw 5-1/4" front-firing polypropylene woofer
  • frequency response: 39-150 Hz (±3dB)
  • continuously variable 50-150 Hz crossover
  • phase switch
  • unfiltered LFE (Low Frequency Effects) mode for connection to left speaker's subwoofer output
  • line-level stereo RCA inputs
  • auto on/off
  • 6-3/8"W x 6-5/16"H x 8-11/16"D

PSB Alpha PS1/SubSeries 100 Reviews

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Great Sound on Your desktop

Written By SL, California on Sunday, August 02, 2015

PSB's have a really good overall sound quality and clarity to them. The bass is great but a bit assisted. They do have some added coloring which enhances the audio quality for the non-audiophile listener. Most won't even notice the difference unless you compare side-by-side with another brand. The sizing of the speakers is nice so it does not take up too much room. They play hi-res audio with ease if you're into that. They are built well and look expensive. Speakers are too low and should be on a stand to get them ear-height but PSB does offer an optional tilt stand for each speaker that helps point the speakers in the right direction so if you don't have them, it's worth the investment. These deliver good audio quality and better than most in their category. You'll love them!

Pros: Good audio, size, build and appearance is top notch

Cons: Speaker height could be higher, on a stand, They have built-in coloring but not too much.

Poor quality wiring harness

Written By Dan, Illinois on Saturday, August 01, 2015

Crutchfield Customer Review (What's this?)

The electrical cord/interconnect/plug is an example of poor engineering. No matter how hard I pushed the female into the male prongs it would never "click" or "snap" in...with a little coercion, I got it to connect. I was tempted to send the unit(s) back but didn't want the hassle of repacking and taking it over to the UPS store. It's working as long as I don't do any more wiring in the vicinity of the subwoofer or wiring transformer. Otherwise, the sound is great.

Pros: Nice bass

PSB Alpha PS1/Sub

Written By Michael O, Florida on Wednesday, April 22, 2015

Crutchfield Customer Review (What's this?)

Nice spacious sound with mid-bass warmth added by sub. Not meant for loud boom-boom playing, Volume control on back very inconvenient. Set-up instructions very poor. Instructions refer to an online owner's manual that doesn't exist.

Pros: Suprisingly good sound.

Cons: Very inconvenient volume control, particularly when speakers are leaned back on speaker stands.

Wonderful PSB system

Written By redtinibob, williamstown NJ on Tuesday, April 01, 2014

Crutchfield Customer Review (What's this?)

I was absolutely amazed at the sound from this small speaker system


Written By MarkS, PacNW on Thursday, January 30, 2014

Crutchfield Customer Review (What's this?)

I am an audio snob, i would say audiophile, but snob is better. I have a large Krell amp, Sonic Frontiers tube preamp, Focal speakers, see snob. I just purchase an iMac and wanted new speakers, the old one's works fine but didn't plug into the iMac. They were THX certified, 5 speakers and sub, very good sound. These PSB's blow them away, stelar quality, beautiful sound and great bass. I have only had them 2 days and have tried all sorts of music from Bach , Led Zeppelin, several movies, Madonna , etc. They all sound good. Built quality is very high and they look very stylish next to the IMac . I put the sub behind the computer on the desk, I tried the floor but this sounds better. I don't write many reviews, but i love these small speakers, highly recommended .

Pros: Small footprint, take-up little space, sexy looking, and easy to set up.

Cons: To sound there best you need to buy the speaker stands. They should come with the stands. Also the cables are junk, with tis level of speaker buy good cables. I bought Audioquest Evergreen and am happy. I had a mother cable for the bass. I am getting a DAC, these speakers are worth it,

Hands-on research

What's in the box?

Download owner's manual

  • PSB Alpha PS-1: Active speaker
  • Passive speaker
  • AC power adapter (with attached 4' DC cord)
  • Two 4' AC power cords (US/EU)
  • 6.5' PowerLink cable
  • 6.5' Stereo minijack cable
  • Quick Start Guide
  • PSB SubSeries 100: Compact powered subwoofer
  • Two 5.75' AC power cords (US/EU) Quick Start Subwoofer Guide
  • Important Safety Instructions

Product Research

Alpha PS1 Powered Speakers
SubSeries 100 Power Sub

Alpha PS1 Powered Speakers

Powered Speakers: The PSB Alpha PS1 Power Speakers combine PSB's most popular Alpha Series speaker design with a built-in amplifier to make a versatile desktop solution with enough acoustic output for a small to medium sized room. The Alpha PS1 Powered Speakers are true hi-fi speakers engineered to upgrade today's audio and desktop listening experiences. Benefiting from forty years of proven acoustic excellence, these speakers use highly efficient amplifiers and state-of-the-art circuitry to create a powerful full-range system, transforming your favorite audio files into desktop concert.

True-to-Nature Sound: The Alpha PS1 Powered Speakers are engineered for the true-to-nature sound for which PSB is known. Many small speakers employ tricks like exaggerating the treble or falsely boosting bass to overcome limitations and poor performance, but not so with the Alpha PS1. Using sound research and exhaustive testing at Canada's National Research Council in the nation's capital of Ottawa, the PSB team has designed the Alpha PS1 with extremely smooth and refined sound. You'll be pleasantly surprised by its output capability and solid tuneful bass response compared to that of the Alpha PS1's diminutive size. The response off to the sides of the speaker has the same smooth response as the sound directly in front, making the Alpha PS1s acoustically "disappear" by projecting a large and exquisitely detailed sound image.

Two-Way Speaker Design: Each PSB Alpha PS1 Powered Speaker houses a 0.75" aluminum dome tweeter and a 3.5" metalized polypropylene cone woofer with a rubber surround and oversized magnet structure. The tweeters utilize an acoustical waveguide to deliver, more even high frequency response. The polypropylene woofers provide accurate, detailed midrange/midbass.

Digital Amplifier: The Alpha PS1 Powered Speakers are powered by highly efficient 20-watt x 2-channel RMS (40W x 2ch Peak) Class D amplifier which is built into the left speaker.

Bass Reflex Enclosure: The Alpha PS1 Powered Speakers feature an acoustically engineered ABS cabinet with UV coating. This bass reflex enclosure features a tuned slot port on the rear of the cabinet which extends low bass response.

Rear-Mount Volume Control: The PSB Alpha PS1 Power Speaker (Left) features a rear-mounted rotary volume control.

Analog Inputs: The PSB Alpha PS1 Power Speaker (Left) is fitted with a stereo RCA input and stereo minijack (3.5mm) input to connect an external audio source; such as your MP3 player, smartphone, tablet, laptop, computer, or TV. 

Subwoofer Output: For those dynamic lows, a subwoofer output (mono-RCA) on the rear-panel of the left speaker allows you to connect a powered subwoofer.

USB Charging Port: The Alpha PS1 Powered Speaker (Left) is equipped with a USB (type-A) power port to charge your USB-enabled device; such as your smartphone or tablet. The USB charging port is rated at 5V/500mA.

AC Power Supply: The Alpha PS1 Powered Speakers operate off of standard household AC current using the supplied universal power supply. The AC power adapter plugs into the left speaker, while the 6.5' PowerLink cable connects power to the right speaker.

Optional Speaker Stands: The PTB-1 tilt base (760PTB1, sold separately) is designed specifically for PSB's Alpha PS1 powered speakers. You can mount the PTB-1 to the Alpha PS1 to angle the speakers upward or flat for bettering stereo imaging, based on speaker placement. Two bases are included. Each base mounts to the bottom of the speaker using four machine screws. Each base also includes four self-adhesive rubber pads to provide safe and secure placement of your speaker.

SubSeries 100 Power Sub

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 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.

Our Product Research Team

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