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PWM Digital Amplifier -
OEM Inquiry
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LC Audio PWM Digital
Amplifier

This digital amplifier module produces
astounding results!

Some text and
shots courtesy of SoundLabs,
Australia

LC Audio Technology
presents a near High End approach to Digital PWM (Pulse
Width Modulation) amplifiers. This super efficient,
simple to install digital amplifier is safe with
reliable operation and is perfect for applications such
as a synchronized digital audio system or multiple
channel high-end home cinema.

One of the big advantages of
digital amplifiers is their efficiency. These modules have
been tested at BETTER than 90% efficiency which means
they need very little in the way of power or heatsink.

The introductory modules in the starter kit are
based upon a asyncrounous switching frequency. The
asyncronous version has shown to have the best sound
quality so that is what the first modules are based
upon. However, all the control hardware for syncronous mode is
located on the board, except the osclillator, so the modules
are ready if we decide in the future that a syncronous
mode operation to work better. This flexibility is going
to help us keep the modules ready for any changes needed
to take advantage of new research.

The modules
are upgradeable now, simply by mounting a standard DIP 8
oscillator 16,9344 MHz in the footprint. Then you have
the clock control feature.

There are restrictions on
clock frequency and power supply ratios. At max supply voltage
of +/- 60V the 1 MHz mode is not allowed, and 512 KHz
would be the highest allowable frequency. At +/- 45V
there is no problem running in the 1 MHz mode. It has
been found that there is very little difference in
performance, when running 512 KHz or 1,024 MHz modes
with the current set-up.

Frequency range extends from DC to
90 kHz, and sound quality can be optimized to real high
end levels by using high grade power supply, cabling and
terminals.

Amazingly enough, the
size of the board is exactly the same as a normal
credit card!

The PWM digital is
based on a Double Integrating Sigma Delta
Modulator.The signal processing is 32
bit floating point and is carried out by the Analog
Devices SHARC ADSP-21065L. Based on the technical
specifications, with comparable testing, the prototype runs with a
switching frequency of 352 kHz.

Up to 1 MHz Switch
Frequency!

Switching frequency
is crucial for the quality reproduction of high
frequencies. The lower the frequency, the worse the
sound quality. However, the higher the switching
frequency, the more heat needs to be dissipated. Over the
preceding years the switching frequencies were limited to no more
than about 350 kHz, however the development of signal
processors, programmable logic and power MOSFETs means
that today it is possible to develop a decent sounding
digital amplifier faster! As we said, at this point we
have found little advantage to progressing past the
512KHz point, but we maintain the flexibility to adopt to a higher
frequency if the situation should
change.

DIYCable and the LC Audio PWM Digital
Amplifer
Our
Pre-Order sale to bring you HUGE
savings!

DIYCable really believes these digital
amplifier modules are going to revolutionize the
amplifier market! The cost/performance ratio promises to
be very high and you get enough power to run virtually
any speaker. We are looking at mounting a couple in a
SideWinder preamp to make an integrated and various
multi-amplifier modules mounted in a low cost chassis to
make VERY affordable multi-channel home theater amplifiers that just
rock.

Pre-Order Sale
Details

DIYCable is hoping to put together a huge
initial order to pass on the great savings to YOU. You
pay now at the pre-order price with a GREAT savings and
take delivery from the first order. And if at any time
you want your money back because you have changed your
mind just let us know.

What
DIYCable would ask is that you be relatively certain that you are
going to take delivery. The pre-order price is $301.00 for
two PWM modules and one Gate Driver Power Supply which
saves you about $250 as this package is going to cost
$565.00 after the sale (Note: You will still need a
normal power supply of +/- 30 to +/- 60 V DC, as in any
power amplifier. This power supply should be able to supply
the same amount of power that you want out of your amplifier; for
instance, at 2 X 100W, you should use approximately at
200 VA power transformer at minimum). We expect to place
our initial order as soon as LC Audio is ready to supply
product.

For $301.00 pre-order price you get
(2) PWM modules with one Gate Driver power supply to run
both. All you need to provide is a chassis, input RCAs,
power switch, speaker output, main power supply, and
mounting accessories for DIGITAL power.

DIYCable is working on a complete amp kit to be released in
the future. A sub amp kit is also in the works with
built-in crossover, power supply and various sub
features built-in. These could easily be configured to
supply 800W into 4 Ohm loads (Shiva/Tempest/Maelstrom)
with no fan, very little heat and a projected target
cost WAY below anything available.

Keep your eye
on this site as we have some really great stuff coming down the
pike! If you think we have done a lot in the last few months
you have only seen the tip of the iceberg... big things
are happening here at DIYCable!

With the PWM
Digital modules, you have a doubling of power with
halving of ohms!

200W/Ch 8
Ohms

400W/Ch 4
Ohms

600W/Ch 2
Ohms

More precise
specifications with distortion figures and such will be
forthcoming. LC Audio knows what they are doing with
both digital technology and amplifier development. You
can count on their reputation in both these areas.

PWM Module Pre-Order Sale
Description

Price

Purchase

1
PWM Digital Amplifier Modules w/ one Gate
Driver PSU

SALE $150.00