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Twenty compact black on-wall speakers with mounting brackets

Acoustic Audio

Acoustic Audio AA321B Mountable Indoor Speakers 10 Pair Pack home audio speaker

SKU CH-81QS-N03K7

Twenty passive speakers with 2.5″ woofers and omni-directional brackets for whole-house or surround sound

  • Product typeOn-Wall Speakers
  • Ten-pair pack equips a whole-home system with twenty speakers
  • Passive design connects directly to any amplifier or receiver
  • 5" polypropylene woofers deliver full-range sound from 150 Hz to 20 kHz
  • 88 dB sensitivity produces big output from compact 3.5" cabinets
  • Omni-directional brackets with hardware make on-wall installation easy

Ten-Pair On-Wall Speaker System

This set provides twenty passive on-wall speakers designed for multi-room audio or surround-sound installations. They suit homeowners, installers or small businesses wanting consistent coverage across many zones from a single amplifier. Buyers needing powered speakers, wireless streaming or outdoor-rated enclosures should look elsewhere.

Sustained Output with Passive Cooling

Each cabinet uses a 2.5-inch polypropylene woofer in a sealed ABS enclosure rated for 20 to 200 watts per channel. The 88 dB sensitivity at 8 ohms and 150 Hz to 20 kHz response deliver steady mid-to-high frequencies during long listening sessions without active cooling or protection circuits.

Bracket Mounting with Spring Terminals

Omni-directional brackets and hardware are included for wall or ceiling placement, and spring-loaded raw-wire terminals accept stripped speaker cable without tools. The compact 3.5 by 3.5 by 4.5 inch cabinets fit tight spaces, but installers must supply CL3-rated or raw speaker wire and verify amplifier power stays within the stated per-channel limits.

How it compares

Measured against everything we stock in Home Speakers & Subwoofers, at today’s prices. Recalculated every night.

Price $272.99
Pricier than about 72% of the 1,147 comparable items (median $133.99).

Specifications

Product
Brand nameAcoustic Audio by Goldwood
Product typeOn-Wall Speakers

Questions about this item

How much power do these 2.5" polypropylene woofers draw from my amp when run all day?

Each speaker handles 20 to 200 watts per channel at 8 ohms; the passive design draws only what your amplifier supplies, so sustained use adds no extra load beyond normal listening levels.

What amplifier or receiver do I already need to drive this 20-speaker set?

Any stereo, home receiver or amplifier with raw speaker-wire outputs rated between 20 and 200 watts per channel will power the system; CL3 or standard speaker wire is required for the connections.

Will the 88 dB sensitivity and 150 Hz low-end match my older 8-ohm front speakers in a surround setup?

Yes — the 8-ohm impedance and 88 dB sensitivity at 150 Hz–20 kHz let them integrate with existing 8-ohm mains, though their 150 Hz roll-off means a subwoofer handles deeper bass.

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