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Pair of black rectangular USB-powered speakers with volume knob and LED accents

H21 USB-Powered Computer Speakers 2.0 Channel 9W Black

SKU CH-7V36-C6VND

USB-powered 2.0 channel speakers deliver 9 W stereo sound with a 47-inch cable and built-in volume knob

  • Connection typeUSB
  • Total wattage9 W
  • RMS power per satellite9 W
  • Frequency range75 Hz
  • Measurements6.1 in × 3.3 in × 6.8 in
  • Product typeSpeaker Systems
  • Immersive 2.0 channel stereo sound with 9W RMS output
  • Driver-free setup via USB power and 3.5mm audio jack
  • Works with PC, laptop, phone and tablet through 3.5mm input
  • Built-in volume knob on 47-inch cable for easy reach
  • Compact 6.1 x 3.3 x 6.8 inch design weighs 1.5 lb

Compact stereo speakers for desktop use

The H21 is a 2.0 channel speaker system powered entirely by a USB connection and driven through a 3.5 mm audio jack. It targets students, office workers and casual gamers who want louder, clearer sound than built-in laptop or monitor speakers without a separate power brick. The lightweight black cabinets sit on a desk or shelf and add a subtle LED accent when powered.

Passive cooling with no fan noise

Because the speakers draw all power from the host USB port, total output is rated at 9 watts and there is no internal fan or active cooling to create audible noise. The frequency response is specified at 75 hertz, so bass extension is modest and best suited to near-field listening at moderate volumes. Heat dissipation is handled by the enclosure itself during normal music, movie or gaming sessions.

Volume knob and fixed 47-inch cable

A rotary volume control on the primary speaker lets you adjust level instantly without software menus. The hard-wired interconnect between the two satellites measures 47 inches, which determines maximum stereo separation and means the pair cannot be placed farther apart. No carrying case, software suite or additional adapters are included in the box.

How it compares

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

Price $17.99
Cheaper than about 88% of the 838 comparable items (median $40.99).

Specifications

Product
Brand nameGENERIC
Model nameH21 Classic Computer Speakers
Product typeSpeaker Systems
Product colorBlack
Audio & video
RMS power per satellite9 W
Frequency range75 Hz
Ports & slots
Connection typeUSB
Power
Total wattage9 W
Size & build
Measurements6.1 in × 3.3 in × 6.8 in
Product weight1.5 lb (0.68 kg)

Questions about this item

How do I connect the USB power and 3.5 mm audio plugs, and which step do people often skip?

Plug the USB cable into a powered port for electricity, then insert the 3.5 mm jack into the audio output; the step users forget is the audio jack, leaving the speakers powered but silent.

What part of the H21 will wear out first and need replacement?

The built-in volume knob on the 47-inch cable sees the most physical use and is the component most likely to fail over time.

At what volume level does the 9 W RMS output start to distort during long sessions?

Pushing the volume knob near maximum for extended periods causes the 2.0 channel drivers to clip, so keep the level below the top quarter for clean sound.

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