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When a review is evidence-based, carried out in good faith, and the evidence can be repeatedly reproduced or replicated, is it the responsibity of the complainant or the defendant to demonstrate the accuracy of the data? Should the litigant be required to produce evidence of tests carried out...

Obviously more than one dealer in the UK still lists at full price. Not sure if it is good practice to identify dealers by giving the link here, but the one I referred to in Birmingham must have stock since the web page states "Available" and allowed a pair to be placed "in the basket" -...

Certain UK retailers still list the speakers at full price, £3,999 a pair. Caveat emptor!

From https://tektondesign.com/product/specials/mini-lore-pair/ at 15:40BST on 6th April 2024. Note: the Mini Lore was recently pulled from my lineup due to a slanderous and deeply flawed review by Amir at Audio Science Review the “place where we pretend to know a lot more about audio that we...

Something to do with the browser flavour - Chrome fails to display the Fosi home page and other pages correctly (at least on this laptop!); Firefox + its derivatives seem to show all pages correctly but still missing the early bird discount link !! However, using Firefox on an Android tablet...

Lucky dude! Looks like the early bird discount form has disappeared from the link given by Fosi. Does this mean the current production run is (1) already oversubscribed based on early bird responses; (2) there will be no Kickstarter options; (3) going by the ZA3 pre-order history there will be...

One feature missing from these speakers, and many others regardless of cost, is the provision for bi-amping/bi-wiring the speakers. As with op-amp rolling this may be a niche requirement. Obviously the omission of two terminals, two straps and a modicum of internal wiring add up to a small...

It is reasonable to suggest that a V3 mono with PFFB should not cost appreciably more than the current stereo V3. The Texas Instruments Application Report on Post Filter Feedback (for the TPA324x and TPA325x series) shows a total of nine components (five resistors and four capacitors)...

There are also Topping products "missing in action"; it is confidence in Topping as a company that has become a problem, as well as product reliability. Quoting from the ASR review by Amirm (https://www.audiosciencereview.com/forum/index.php?threads/tp-ra3-rackmount-amplifier-review.46085/) of...

The influence ASR is having (present tense so important) on the industry is demonstrated by the increasing number of performance graphs and charts that accompany advertising of a product new to the market, but sadly only rarely from established and more traditional "names". The extreme case is...

Comparison of the Soncoz SGP1 and the Benchmark AHB2, the Benchmark is preferable simply because there is no apparent facility to bypass (or switch off) those flickering VU meters on the Soncoz. Granted the Benchmark has no meters to switch on, but it can be set up in bridged mode. Back in the...

Pricing in the UK seems rather strange. A quick search shows prices from £6,000.00 => £6,749.00 => £6,895.00 => £7,350.00 => £7,650.00=> £7,685.00, etc. Is there a range of specifications to justify such a wide difference in prices?

Quite agree; but which way should I travel => invest in the ZA3 now or wait for the PFFB improved version? Perhaps the "Sub Out" issue is the decision-making tipping point!! By the way, my other wish is offset spacing for the speaker terminals, as found on the Aiyima 07MAX; otherwise "Fosi is...

If an amplifier supporting PFFB is available "as early as next quarter" , does this make the ZA3 a "dead duck" in the marketing sense? My intention is (or was) to sign up for the ZA3, maybe two for using as monoblocks. With the possibility of an improved version coming so soon, I probably will...

The "pre-out" on the V3 can be used as an input to another amplifier (V3) in a bi-amping configuration, as it is simply a feedthrough of the input. Similarly the "Aux" output on the Aiyima 07MAX is also, I believe, a feedthrough of the input signal and can be used in the same way. Moving on to...

The "pre-out" on the V3 can be used as an input to another amplifier (V3) in a bi-amping configuration. Similarly the "Aux" output on the Aiyima 07MAX is also, I believe, a feedthrough of the input signal and can be used in the same way. Moving on to the Fosi ZA3, the "Sub Out" output is...

You will find a list of drop-in replacements for the NE5532 attached to the first post in the thread Op Amp Rolling. The consensus of opinion in that thread suggests "rolling the op amps" will make little or no difference to the perceived sound quality, yet there are those who strongly...

The 48V/5A power supply available with the Aiyima 07Max is model FJ-SW21284805000D with the input rated at100-240V~50/60Hz 6.3A. An earlier post on ASR suggested the power supplies could be found on https://en.sz-fujia.com/Home.html. Although there are several FJ-SW2xxx parts listed, the exact...

In the review of the Fosi V3 (Fosi Audio V3 Amplifier Review), Amir wrote “There are replaceable op-amps for those of you who have nothing better to do than mess with the design.” For those who want to do just that, it is difficult selecting which op amps to “roll with”. Both the Fosi V3 and...

From Aliexpress: AIYIMA A07 MAX TPA3255 Audio Power Amplifier 2.0 Stereo Amplify 300Wx2 PBTL Mono Sound Amplifier 600W Looks like the promised upgrade to the 50V caps has reached the market, if we interpret the 2.0 as the upgrade!