Comments on: Massive Audio Plans EV Amplifier

By: Isaac Troseth

Isaac Troseth — Fri, 30 Sep 2022 22:14:48 +0000

I gotta admit.. I’m a “try anything” sort of guy, but I don’t think I want to be tapping into 400-800vDC batteries. AC hurts and can kill you, DC hurts and will almost definitely kill you (makes you grab on instead of let go).
I like the ingenuity of using high voltage to cut out the high-to-low voltage convertor in the car out of the loop, thus increasing efficiency. But I question how safe it will be in the EV field for techs that aren’t used to working on EVs. You need to be very safe and have the correct PPE and those gloves can have zero pinholes in them.

By: STEVE MANTZ

STEVE MANTZ — Wed, 28 Sep 2022 13:16:15 +0000

In reply to Hernando JR Mares.

Hernando,

To whom are you replying?

if it is to Zed Audio there is nothing on our website about class D amplifiers.

By: Hernando JR Mares

Hernando JR Mares — Wed, 28 Sep 2022 01:14:57 +0000

In reply to STEVE MANTZ. Sir, you seem to be contradicting what is on your web site regarding class-d, "pesky high powered class D....The designs have flaws." I was using high speed digital to refer to the newer Class-d chip sets like the Crown, Ice edge and others. Moreover, class D was not prevalent in pro audio until more recently due to issues in traditional off shore/older class-d designs. In my opinion, sir, you are one the best designers for power supplies, along with Mr. Dirk Ecker from US AMPS.

By: STEVE MANTZ

STEVE MANTZ — Tue, 27 Sep 2022 20:25:04 +0000

This is what Massive wrote:
In traditional Class D amplifiers, you have limited bandwidth, [NONESENSE MY DESIGNS USED BY OTHER CAR AUDIO COMPANIES RUN FLAT TO 50kKHz] limited signal to noise ratios [NONESENSE AGAIN, MY UNIQUE POWER SUPPLY ALLOWS FOR S/N RATIOS OF OVER 100dB IN 150w 4 OHM AND HIGHER POWERS], lots of noise [NONESENSE ONCE AGAIN IF YOU DESIGN THE POWER SUPPLY CORRECTLY AND USE MULTI LAYER GROUNDING, THEN NOISE IS NOT AN ISSUE] and a much lower damping factor [ ONCE AGAIN CLUELESS AS MY DESIGNS ENCASE THE RECONSTRUCTION FILTER WITHIN THE FEEDBACK LOOP AND SO DAMPING FACTOR CAN BE KEPT ABOVE 150 ref 4 OHM], due to the need for lots of filtration on the amplifier’s outputs, he said.

High speed digital amplifiers [ NO SUCH THING AS A “DIGITAL AMPLIFIER” – ALL CLASS D AMPLIFIERS ARE ANALOG], on the other hand, are switching at super-fast speeds, at much higher frequencies. They require very little output filtration [ BS] and thus have superior performance and sound quality characteristics,” he explained.

ZED AUDIO CORP.

By: Erik Harbour

Erik Harbour — Tue, 27 Sep 2022 17:09:01 +0000

While I applaud the ingenuity and effort to try something new, and the concept is there.. However, I really just can not see that tapping into the main battery bank of a Tesla or other EV is something anyone wants someone doing. Tesla alone does not want you to replace the 12V battery on your own. Of course we can all do it easily, but they know how volatile their electrical system can be so they are careful on all fronts when it comes to that. Now we are saying hey lets just let a 12V installer tap on into the main battery bank thus drawing power from the source the car needs to get down the road, and in turn lowering range the one factor everyone wants more of in an EV..