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Fosi Audio

Fosi Audio V3 Mono Power Amplifier

Fosi Audio V3 Mono Power Amplifier

  • Authorized Retailer
  • Free US Shipping $49+
  • 1-Year Warranty
  • 45-Day Returns
$117.99 USD
$117.99 USD
Sale Sold out
Shipping calculated at checkout.
Title

The Fosi Audio V3 is a 240W mono Class D power amplifier built on the TPA3255 with PFFB (post-filter feedback). This listing is the version bundled with the 48V/5A power supply.

As a mono block it's aimed at subwoofer duty and at home HiFi setups where you'd rather run one amp per channel than share a stereo chassis. Buy two for a monoblock pair, or a single unit to drive a passive sub alongside your existing stereo amp. The bundled 48V/5A supply matters - power supply choice sets what the amp can actually deliver, so match it to the configuration you're planning.

  • TPA3255 mono Class D, 240W
  • PFFB design
  • Includes 48V/5A power supply
  • Subwoofer and home HiFi use

Authorized Fosi Audio retailer. Free US shipping over $49, 45-day returns, 1-year warranty.

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Frequently asked questions

Is this unit genuine?

Yes. TonePier is an authorized retailer — every unit comes from the brand or its official distributor, carries a valid serial number and is covered by the full manufacturer warranty.

How long does shipping take?

SKUs stocked in our US warehouse ship within 1–2 business days. Items shipped direct from our China hub typically arrive in 8–15 days with full tracking. The product page tells you which applies before you order.

What if it isn't for me?

You get 45 days to decide. Keep the packaging, keep it in like-new condition, and send it back for a refund. Ear tips unsealed for hygiene reasons are fine — we expect you to actually listen.