Compact speakers deliver deceptively big sound

PSB's engineers began by designing each Alpha speaker from scratch to ensure that they'll deliver the same level of performance typically found on speakers twice their price. The Alpha LR1s use a 3/4" aluminum dome tweeter to deliver crisp, sparkling highs. The 3-1/2" woofer is made of metalized polypropylene, making it strong but lightweight. You'll hear excellent midrange detail and distinct bass without a trace of the listening fatigue that can happen with lesser speakers.

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Compact speakers deliver deceptively big sound

The Alpha LR1s are the smallest speakers in PSB's lineup, yet they still manage to deliver dependably crisp, clear PSB sound. These versatile speakers can be used as both front and rear satellite speakers, making them an excellent choice when you're looking to create a high-end, budget-friendly five- or seven-speaker satellite system. Designed to be wall-mounted or placed on an entertainment stand, they're the perfect solution for rooms with various seating arrangements and odd sizing.

Excellence by design

Build a complete Alpha system

Create a complete, budget-friendly Alpha home theater system using five to seven LR1 speakers mounted around your room. Or use the LR1s in the back of your room, and add a pair of Alpha T1 floor-standing speakers or the B1 bookshelf speakers to the front of your room. And don't forget to pick up a PSB powered subwoofer (or two) for room-thumping bass.

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Product highlights:

frequency response: 90-21,000 Hz (±3dB)
sensitivity: 87 dB
impedance: 6 ohms
recommended power: 15-80 watts
3/4" aluminum dome tweeter
3-1/2" clay metalized polypropylene woofer
bass reflex (ported) design
gold-plated five-way binding posts
keyhole slot and threaded insert for optional wall mounting
black ash vinyl finish
4-11/16"W x 7-3/16"H x 6-1/2"D (each)
weight: 4.1 lbs. (each)
warranty: 5 years
MFR # Alpha LR1 BLK

What's in the box:

PSB Alpha LR1 owner's manual

2 Bookshelf loudspeakers
2 Detachable grilles (installed)
8 Self-adhesive rubber feet
Owner's Manual (En/Fre/Sp/GE)
Limited Warranty information

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Researched by Crutchfield's Stacey B.

Features & specs


Enclosure	Acoustic Suspension
Finish	Wood-grain vinyl
Color	Black
Tweeter Type	Dome
Tweeter Size (inches)	0.75
Midrange Size (inches)	N/A
Woofer Size (inches)	3.5
Woofer Composition	Polypropylene
Woofer Surround	Rubber
Power Range	15-80
Sensitivity	87 dB
Impedance (Ohms)	6
Frequency Response	90-21k Hz
Connector Type	5-way post
Bi-amp Inputs	No
Height (inches)	7-3/16
Width (inches)	4-11/16
Depth (inches)	6-1/2
Weight (pounds)	4.1
Wall-mountable	---
Bracket Included	Keyhole
Recommended Stand Height (inches)	26-31
Parts Warranty	5 Years
Labor Warranty	5 Years

Product Research

Driver Technology
Enclosure Design
Connections
Mounting Options
Specifications

Driver Technology

Two-Way Design: The PSB Alpha Series LR1 loudspeaker features a true two-way design that employs a single 3.5" mid-woofer paired with a single .75" ferrofluid-cooled tweeter. The result is an extremely tight sound with excellent imaging characteristics

3.5" Woofer: Each PSB Alpha Series LR1 speaker employs a 3.5" injection molded metalized polypropylene woofer with rubber surround.

0.75" Tweeter: Each Alpha Series LR1 is equipped with a 0.75" aluminum dome, ferrofluid-cooled tweeter.

Waveguide: The LR1's tweeters utilize an acoustical waveguide to deliver, more even high frequency response, no matter what part of the room you're in.

Crossover Network: The tweeters and woofers are crossed over at 3,000 Hz.

Magnetically Shielded: The LR1 is magnetically shielded for safe placement adjacent to your television.

Enclosure Design

Wood Grain Vinyl Cabinet: The PSB Alpha Series LR1 features a black wood grain vinyl cabinet that matches almost any decor.

Acoustic Suspension Design: The Alpha Series LR1 utilizes an acoustic suspension (sealed) enclosure for tight, accurate midbass performance.

Aluminum Grille: The speakers come with removable aluminum (metal-mesh) black grilles.

Connections

5-Way Binding Posts: The 5-way binding posts will accept bare wire (up to 12-gauge), pin connectors, spade connectors, banana plugs, and dual banana plugs.

Color-Coded: The speaker's binding posts are color-coded (red/black) for easy identification between positive and negative.

Mounting Options

Rubber Feet: The PSB LR1 loudspeakers include eight self-adhesive rubber feet to safely and securely place the speakers on floor-stands or other AV furniture.

Wall Mounting: Each PSB Alpha Series LR1speaker features a single keyhole slot and a 1/4"-20 threaded insert to wall-mount the speaker. In addition, non-skid rubber bumpers are attached in the corners of each speaker, so not to mar wall surfaces when the speakers are mounted.

Keyhole Slot: Each Alpha Series LR1 speaker has a single keyhole slot on the back panel to easily wall-mount the speakers.
1/4"-20 Threaded Insert: Each LR1 loudspeaker also features a single 1/4"-20 threaded insert to wall-mount the speakers using optional articulating brackets (sold separately).

Specifications

Frequency Response:

On Axis @ 0°: 90-21,000 Hz (+/-3dB)
Off Axis @ 30°: 90-10,000 Hz (+/-3dB)
Low Frequency Cutoff -10 dB: 85 Hz

Sensitivity:

Anechoic Chamber: 85dB
Typical Listening Room: 87 dB

Internal Volume: 0.07 cu ft

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