Wednesday
Oct272010

Burning Amp 2010

We've known about the Burning Amp Festival for a few years. A bunch of Bay Area DIY audio types get together and listen. We think it's totally cool, or since the amps are burning, hot. 

Once again we can't make it to the festival, but this year we are going to help out. PowerPhysics is donating A-154 and A-414 amplifiers to the Burning Amp cause: better sound for all or nihilist egg shaped amplifiers, or anarchy. You decide.

So if you are in the San Francisco Bay Area this weekend check out www.burningamp.com. Listen to good sound and perhaps win a free One-Cycle Sound amplifier PCBA.

Monday
Oct252010

AES 129th Convention 2010

We will be walking the floor at the AES Convention November 5th through 7th. Anyone interested in planning a meeting ahead of time should send us an email. (Use the Email Us form in the header.)

While I am on the subject of conventions, PowerPhysics will also be available for meetings at the NAMM and CES shows. If you are interested in our Class-D amplifiers, switching power supplies or DSPs and attending the NAMM show you can easily visit our facility. Newport Beach is just a twenty minute drive from the Anaheim convention center.

Wednesday
Oct202010

Cables for Amplifier Prototypes

Over the years we have learned that sending out amplifier evaluation systems without a complete set of cables creates headaches all around.

If you and your team are building prototype Class D amplifier systems using PowerPhysics switching amplifiers and power supplies we have all the tooling to help you build the cables. Just tell us the length and the connector reference (ie A-1014 J1) on each end. 

We can supply cable sets for production orders too.

Thursday
Sep162010

Welcome to PowerPhysics new website

Our new website is designed to be research tool for engineers designing the latest audio electronics products.

We want to make building plate amplifiers for powered speakers easy, so all of PowerPhysics amplifiers, power supplies and signal processors are accessible from the front page via the columns on the right or the search button on the left of the upper banner.

In the near future you will be able to purchase samples directly from the website.

Tuesday
Aug102010

What's a watt? How to rate amplifier power.

Back in the day, James Watt was developing his steam engine everyone knew that power was  rate of doing work or using energy. Time was part of the unit. Confusion was minimal.

Flash forward to present day audio specifications and confusion reigns. Power in watts is the go to number for amplifier buyers. Power is good and more power is better. Marketing types know this and  some products are specified in marketing watts or paper watts. 

Short of outright fraud, the lever used in these calculations is that the RMS voltage content of an audio signal is lower than that of a sine wave. The rule of thumb is amplifiers are used at 1/8th power. 

So should an 800 W amplifier run continuously at 800 W , 100 W or in between? If it's a PowerPhysics amplifier it will run for a minute or longer at its rated power of 800 W and forever at one quarter to one third. These numbers will vary if custom heat sinks are used. 

Amplifier run time should be independent of frequency. PowerPhysics amplifiers will output full power for the same amount of time at 20 Hz or 20 kHz. 

Amplifiers that require a Zobel network to control ringing without a load may  limit run time at high frequencies. PowerPhysics amplifiers do not use Zobel networks because unless the components are very large they can melt at high frequencies. Be warned.

The bottom line: Run your own tests. Do not buy paper watts.