PSB Alpha SubZero i 8″ Powered Subwoofer – 260W Peak

The PSB Alpha SubZero i powered subwoofer, with an 8-inch driver, 100 watts continuous (260 watts peak) on board and a slotted front port.

What it is

The SubZero i was the second-generation SubZero, designed by Paul Barton for PSB’s Alpha Series, the line built on the idea of performance well beyond its price. As Barton put it: “The Alpha idea of providing performance far beyond what you expect at the price has special impact here.”

It was a considerable upgrade over the original SubZero. It has twice the continuous power (100 watts against 50), and a re-engineered 8-inch driver with a polypropylene cone, a 1½-inch (38 mm) voice coil for high continuous output without thermal compression, and an oversized rubber surround for long cone travel. Its slotted front port has almost double the cross-section of the original’s, for more output with very low port noise, and it reaches deeper, down to 36 Hz (−3 dB), with useful output to 32 Hz. Improved overload protection watches long stretches of average power as well as short peaks, and the driver’s magnet is shielded, so the sub can sit right next to a TV.

The volume and crossover controls are on the front of the cabinet, so you can fine-tune the bass without pulling the sub away from the wall. The crossover is variable from 50 to 150 Hz with a steep 24 dB-per-octave Linkwitz-Riley filter, and a Crossover Bypass switch hands that job to an AV receiver’s own bass management when you use its subwoofer (LFE) output. Gold-plated RCA line-level inputs take a receiver’s subwoofer output or a stereo line-level pair. For an amplifier or receiver with no subwoofer output, speaker-level inputs on 5-way binding posts take bare wire, spades, pins or banana plugs; we recommend our own Radique Audio gold-plated banana plugs, and our Custom Speaker Cable Builder will make a pair to length, ready to plug in. A 0/180° phase switch helps it blend smoothly with your main speakers, and the power cord is removable.

Choose your unit

Pick a finish above to see that unit’s photos, condition and details.

Real PSB bass from a compact 8-inch cabinet, ready to plug into your system.

Available for pickup in Kanata, or shipped across Canada and internationally — we have sent equipment to fifteen countries in the past year, each piece packed in-house in 275 lb test double-wall boxes. Live shipping rates for your address are calculated at checkout. Backed by Radique Audio’s Bumper-to-Bumper Warranty and our Perpetual Trade-Back Program. Available for audition by appointment in Kanata.

PSB Alpha SubZero i Specifications

• Type: powered subwoofer, 8″ driver, slotted front port, magnetically shielded
• Driver: 8″ (203 mm) polypropylene cone, rubber surround, 38 mm (1½″) voice coil
• Amplifier: Class AB with discrete MOSFET output devices; 100 W continuous, 130 W dynamic, 260 W peak
• Frequency response: 36–150 Hz (±3 dB)
• Low-frequency cutoff: 32 Hz (−10 dB)
• Crossover: variable 50–150 Hz, 24 dB/octave Linkwitz-Riley low-pass, with Crossover Bypass for LFE use
• Inputs: gold-plated RCA line-level/LFE inputs; speaker-level inputs on 5-way binding posts
• Controls: front-mounted volume and crossover; 0/180° phase, Crossover Bypass, On-Standby/Off power switch
• Power cord: removable
• Dimensions: (Width x Height x Depth) 9.6 x 14.1 x 14.5 inches (244 x 359 x 368 mm), height including feet
• Weight: approx. 23 lbs (10.5 kg)

✅ Buy With Confidence — The Radique Promise

Backed by Radique Audio’s Bumper-to-Bumper Warranty and our Perpetual Trade-Back Program. When you’re ready to move on, we’ll take it back. That’s the Radique difference.

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