MainBuyer Evidence Layer

Fosi Audio BT20A Bluetooth Amplifier for Speakers, Mini Stereo 2 Channel Amp Class D, with TPA3116 Chips 100W x 2 and Bass Treble Controls, for Home Audio Outdoor Passive Desktop Bookshelf S Ireland price history

Timestamped retailer-price observations recorded by MainBuyer in Ireland. These figures are first-party MainBuyer records, not a reconstructed or estimated daily price chart.

Tracking started

No publishable price history yet

MainBuyer only publishes observations that have a real checked timestamp and recorded retailer price in Ireland. We do not create artificial historical points to fill gaps.

Methodology

How this price dataset is produced

Each row is created when a MainBuyer offer record has both a price and a real price checked timestamp. Repeated checks can create repeated observations even when a price has not changed, because that records how long the observed price remained available.

Historical low, high and median calculations use recorded observations that were marked in stock. Missing dates are left missing: MainBuyer does not interpolate, backfill or invent prices for periods when no check took place.

For the buying verdict, limitations and current retailer comparison, see the Fosi Audio BT20A Bluetooth Amplifier for Speakers, Mini Stereo 2 Channel Amp Class D, with TPA3116 Chips 100W x 2 and Bass Treble Controls, for Home Audio Outdoor Passive Desktop Bookshelf S price comparison and review. For the wider dataset, see the MainBuyer Ireland Price Index. See also how MainBuyer reviews products.