March Audio Amp Updates

[March Audio]

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.

We have also implemented a clip indicator. This indicator is integrated with the power indicator to keep the simple clean looks of the amp. It flashes the power light considerably brighter if a clip event is detected.

Below is a video to demonstrate, apologies for the poor quality, it doesnt show it too well but the indication is very obvious when viewed directly.

 

[ririt]

how is determined the threshold above which the light is blinking?

 

[March Audio]

how is determined the threshold above which the light is blinking?

It is determined by the magic happening inside the Hypex module

If you look at the waveform on a scope or on an FFT you can see it triggers as soon as it starts to flatten and harmonics start to rise rapidly.

 

[ririt]

It is determined by the magic happening inside the Hypex module

If you look at the waveform on a scope or on an FFT you can see it triggers as soon as it starts to flatten and harmonics start to rise rapidly.

you will be consider as a heretic talking about magic on ASR! But I think it is a nice feature. Will you incorporate it on your coming P452?

 

[dougi]

The Hypex modules also have a current sensor. I imagine with a bit of work that could be turned into a VU meter. Unlikely space in the March audio cases for that though

 

[March Audio]

you will be consider as a heretic talking about magic on ASR! But I think it is a nice feature. Will you incorporate it on your coming P452?

Not initially, but a possibility later on.

 

[kaka89]

Was expecting to see Purifi amp when I click this

 

[Dj7675]

Very cool. Thanks for sharing the updates.

 

[Soundstage]

Nice!

 

[f1shb0n3]

@March Audio - Impatiently waiting for your P452 release!

 

[March Audio]

@March Audio - Impatiently waiting for your P452 release!

I know . Just ran out of time yesterday to get the amp on the website. We are extremely busy at the moment. It will be up this weekend.

Cheers

Alan

 

[DonH56]

Curious (not my field): is pure copper more or less likely than brass to corrode (oxidize), or are they they same? I think copper oxide insulates where silver oxide (tarnish) is conductive but long time since metallurgy...

 

[March Audio]

Curious (not my field): is pure copper more or less likely than brass to corrode (oxidize), or are they they same? I think copper oxide insulates where silver oxide (tarnish) is conductive but long time since metallurgy...

They are gold plated (without nickel - apparantly that helps ?!?) so they wont suffer oxidation.

Im not going to make any claims about the efficacy/influence on sound quality of copper over brass, although in theory copper is a better conductor.

The main reason for the change was that these are mechanically better than the old posts we used, allow better entry for spades and large cables. Just higher quality all round.

 

[suttondesign]

i am saving up, trust me.

 

[RayDunzl]

Curious (not my field): is pure copper more or less likely than brass to corrode (oxidize), or are they they same? I think copper oxide insulates where silver oxide (tarnish) is conductive but long time since metallurgy...

A thin film of antixoxidant works.

NO-OX-ID-A was the required annointment in my Telco days.

Lots of copper around battery racks and rectifiers and power distribution cabinets and single point grounds.