Fosi Audio GR70 Tube Headphone Amp Preamp, Authentic Tube-Amplification with Vacuum 5654W*2 & 6AC7*2, Mini HiFi Preamplifier for Home Audio, 3.5mm & 6.35mm Jacks Supporting 16-300 ohms Imped Canada price history
Timestamped retailer-price observations recorded by MainBuyer in Canada. These figures are first-party MainBuyer records, not a reconstructed or estimated daily price chart.
No publishable price history yet
MainBuyer only publishes observations that have a real checked timestamp and recorded retailer price in Canada. We do not create artificial historical points to fill gaps.
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 GR70 Tube Headphone Amp Preamp, Authentic Tube-Amplification with Vacuum 5654W*2 & 6AC7*2, Mini HiFi Preamplifier for Home Audio, 3.5mm & 6.35mm Jacks Supporting 16-300 ohms Imped price comparison and review. For the wider dataset, see the MainBuyer Canada Price Index. See also how MainBuyer reviews products.