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Anybody have any interesting data/papers on the effect of ear anatomy (pinna/concha/ear canal shape) on headphone response?

@ctrl recently showed some interesting data regarding the masking effect which limits the audibility of low frequency harmonic distortion in speakers The effect of the masking does change with frequency and fundamental amplitude. Higher distortion is required before it becomes audible with...

@ctrl To discuss your post in the other thread. I'm travelling atvthe moment so please excuse dodgy phone typos and ability to access all the info I need to. Fully accept the point about masking but let's look at another graph So here we see H2 needs to be about 15dB below the fundamental...

I have to raise another point about these speaker reviews in general. That is regarding the usefulness, relevance and validity of equalising the response. Equalising the response of a speaker that has good off axis response is perfectly valid and useful. However you need accurate measurement...

This has been teased for a while now, we decided to put it on hold at the start of covid but are now ready for release. The Sointuva (Finnish for musical harmony) is based on the Purifi Ptt6.5W04 woofer, PTT6.5 PR passive radiators and the Bliesma T34B-4 Beryllium tweeter. Im not going to go...

Finally available. Will post more later :) https://www.marchaudio.net.au/p452

The P122, P252 and P502 amps have had a few updates recently. They all now feature upgraded ETI Research BP20C speaker binding posts which are solid copper, not brass as found elsewhere, with a gold plating. All amps now feature a 12volt trigger input for remote power control as standard...

Omg Just saw Tenet this afternoon. Possibly the most confusing film I have ever seen. To the point of not being able to figure out if the events portrayed were possible given the premise of the story. Still strangely compelling regardless. Lots of bemused faces coming out of the cinema. My...

For attendees of the Sydney Hifi show at the beginning of April, March Audio will be offering a 10% discount on all products. www.hifi2020.com We are pleased to announce this discount is going to be available to all customers from today until the close of the show on 5th of April. I will...

March Audio is very pleased to announce that we will be exhibiting at the HiFi2020 show in Sydney, April 3rd to 5th. http://www.hifi2020.com/ http://www.hifi2020.com/marchaudio.html Come see us in room 15 in "The Corridor Of Sound" on the 9th floor and listen to some great music. We will...

We will soon have on the website speaker cables to compliment the interconnects. Using Canare 4S11 any custom length can be made, single or biwire. http://www.canare.com/ProductItemDisplay.aspx?productItemID=65 Locking Banana termination shown here

Hi Our P451 Purifi MonoBlocks are now ready, will be on the website this weekend. They follow the form of all our amplifiers, compact enclosure milled from aluminium block with tough anodised finish. Features: OPA1632 based fully differential input buffer with very low noise LT3045/94...

Had a fascinating discussion elsewhere. A few audiophles of the subjective persuasion talked about how the sound of good systems elicit emotional reactions, involvement and have "soul". There is no argument that music can elicit emotional reactions, however to ascribe this ability to, for...

I have a particular interest in this project for a couple of reasons; I spent many years at Rolls Royce Aero Engines in test and development working on the EJ200 engine thats powering the car. The project is also based in Berkeley in the UK where we used to live, at the now decommissioned...

OK, it happened again. I recently listened to some large horn speakers. I have periodically done this over many years at various hifi shows. I came away again with the same thoughts. I just don't get them. Firstly they were clearly highly directional. Unless I was right bang in the firing...

Quick video, very busy here today

Just generally an interesting video but a mention of a Bruno Putzeys designed Smps caught my attention. At 38:30

Being ex Rolls Royce and having worked on Concorde this is awesome 10m long RC Concorde with 4 small gas turbines. No afterburner though :(

One for @restorer-john http://www.righto.com/2019/08/reliable-after-50-years-apollo-guidance.html?m=1

March Audio are very pleased to announce we will be exhibiting at the StereoNet 2019 Melbourne International Hi-Fi Show which runs from October 18th to 20th. We will be demonstrating the entire range of equipment so please come and see us in room 1207, have a chat and enjoy some good music ! :)...