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February 2022 Meeting Notice: Merlijn Van Veen – AES75 – AES standard for loudspeaker measurement

The next online meeting of the AES Melbourne Section will be on Monday 14th February 2022 at 7:30pm AEDT (UTC+11).

Merlijn Van Veen, Chair of the AES Standards Task Group SC-04-03-A and Senior Technical Support & Education Specialist at Meyer Sound will present on the topic of:

AES75: AES standard for acoustics  
Measuring loudspeaker maximum linear sound levels using noise

Merlijn will briefly explore the background and impetus for this project. The AES Standards procedure will be explained and demonstrated, including challenges faced by the SC-04-03-A Task Group and how the Group’s activities have inspired development within other standard bodies. The session will close with a description of the remaining development steps.

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Meeting Report: December 2021 – Loudspeaker Power Ratings – Michail Barabasz

On Monday December 13th the AES Melbourne Section mounted yet another Zoom online meeting.

Over thirty members and guests joined the meeting to hear Michail Barabasz of Lorantz Audio Services present on the topic of Loudspeaker Power Ratings

Title slide

After welcoming everyone, Section Chair Graeme Huon introduced Michail who started his presentation with a brief history of his career at Plessey Rola (pre-1975), including and his involvement with the 1977 Australian Standard for Sound System Equipment (AS1127, Part 5 – Loudspeakers), before establishing Lorantz Audio Services in 1976.

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Preliminary Meeting Notice – February 2022

Our first meeting for 2022 is scheduled for Mon 14th February, and it will again be via Zoom.

We will be honoured to welcome Merlijn Van Veen, Senior Technical Support & Education Specialist of Meyer Sound, who will be joining us from the Netherlands.


Merlijn is also Chair of the AES Standards Task Group SC-04-03-A, which has been tasked with developing a new standard X250/AES75 “AES standard for acoustics – Measuring loudspeaker maximum linear sound levels using noise”.

Merlijn will be giving us an overview of that work, and in particular a preview of a new test signal under consideration.


Merlijn’s presentation should be an excellent follow up to Michail’s December presentation on Loudspeaker power ratings.


Further details, and bookings will be available closer to the date – stay tuned!

December 2021 Meeting Notice: Michail Barabasz – Loudspeaker Power Ratings

Meeting Notice

The next online meeting of the AES Melbourne Section will be on Monday 13th December 2021 at 7:30pm.

Michail Barabasz, of loudspeaker maker Lorantz Audio will present on the topic of:

Loudspeaker Power Ratings

and other myths.

Modern class D amplifiers are capable of kilowatts of drive and care little for the load impedance. Can loudspeaker voice coils and suspensions handle this?
Dedicated amplifier/loudspeaker combinations in active boxes can have sophisticated protection programming.
How effective can this be?
How should the standards for loudspeaker testing and power ratings tackle this?

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Meeting Report: October 2021 – From Stradivarius to Speaker – Joe Hayes

On Monday October 11th the AES Melbourne Section mounted another Zoom online meeting, due to Victoria’s continuing and now world record-breaking pandemic lockdown situation.

Over thirty members and guests joined the meeting to hear Inventor and Vastigo Ltd CTO, Joe Hayes speak on his DaS AuReality loudspeaker technology in a presentation entitled:

From Stradivarius to Speakertechnology for improvements in sound delivery and room acoustics treatment”

The DaS AuReality system claims to reduce the impact of room acoustics for the listening experience and produce a listening experience free of sweet spot limitations by using an algorithm to create Diffusion at the Source (DaS))

Joe Hayes describes the benefits of DaS AuReality (Screenshot -Rod Staples)
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