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ZapPulse 2.2SE [Obsolete!]
Note this product is replaced by ZapPulse 2.3SE Click here!
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New third generation PWM amplifier technology. This tiny module can produce up to 290 Watts of pure Audio
Power in 8 Ohms, 580 Watts in 4 Ohms and
1000 Watts in 2 Ohms RMS Continuous power. Standard Edition (lower rated) version rated at 200 Watts RMS
in 8 Ohms, and up to 650 Watts in 2 Ohms.
Unique to the ZapPulse modules they can be bridged for incredible high output powers at virtually
no space and cost. Two modules in bridge mode will deliver +1000 Watts in 8 Ohms and up to 2000 Watts in
The module size is exactly the same as a normal credit card!
Since the efficiency is extremely high (some 96%), almost no heat sinking is required.
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Power Loss curve showing the losses in a PWM amplifier, at different power levels, compared to that of a
normal Class A/B amplifier.
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Sound quality is comparable to the best Class A amplifiers available, independent tests in Audio
magazines show this module to perform as well as typical
well known High End Audio amplifiers in the price range of US$5000 up. See one test: Click Here|
The new module has on board DC servo, to allow trouble free connection to electrostatic loudspeakers, and
of course the short circuit protection
keeps your amplifier safe in uses where the outputs might get shorted. If you wish to drive low impedance
speakers, such as Infinity Kappa, or DALI Megaline,
with impedances down to 1.5 Ohms in the bass region, you can do so by disabling the Short Circuit
Protection. It is completely safe to drive a 1.5 Ohms load
at around 800 Watts RMS, as long as the outputs are not shorted.
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The output power specs are measured at 100 ºC, but since the amplifier module in a normal setup never
exceeds 30 ºC, there is still a good safety margin.|
The input signal is analog, and so connects with any ordinary audio line signal from a preamplifier, CD
player or any other source. On the ZapPulse 2.2 SE module it is converted to PWM square waves in an ultra
high speed integrating modulator. This integrator constantly compares the input signal with the output
signal, directly after the MOSFET's (Local Feedback). If any deviation of the output signal, integrated
over a time period of one switching cycle (approximately
1 / 500.000 th of a second) the pulse width of the subsequent switching cycle is corrected exactly to
level out the deviation, and stay right on the signal track.
The PWM technology is more costly than a normal analog amplifier, but no heat sinks are required, and all
energy from the power supply is converted almost without loss
to Audio power, therefore it does not have to be oversized like in a normal analog amplifier.
Subsequently a complete PWM amplifier can be built much cheaper than a similar conventional amplifier.
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|Minimalist System! This is how simple a monoblock can be built with
ZapPulse! The shown 'heat sink' can support the amplifier at audio powers up to a continuous 400 Watts
To build a complete amplifier you need:|
2 ZapPulse 2.2SE modules.
1 Predator Power Supply module.
1 Transformer 2 x 42V 400 VA.
1 DC filter
1 set with signal plugs and speaker connectors.
1 IEC fused mains inlet with noise filter.
|ZAPpulse 2.3 Special Edition (1 ch)||EUR 117.58||Order Now
|Ext Predator Power Supply for 2ch. ZAPpulse 2.3SE (15000uF)||EUR 53.58||Order Now
|ZAPpulse Virtual4pole PowerSupply 100.000uF + DC filter & soft start||EUR 252.24||Order Now
|220VA Transformer (230V) 2x42V+15V "Pancake", CE appr.||EUR 37.48||Order Now
|220VA Transformer (115V) 2x42V+15V "Pancake", CE appr.||EUR 32.11||Order Now
|Mains DC Filter - Stop Transformer Noise! 1200 VA||EUR 31.03||Order Now
|Speaker terminals goldplated, 1*red+1*black||EUR 19.87||Order Now
|2pcs. Goldplated RCA alu/teflon||EUR 9.56||Order Now
|IEC filtered and fused inlet 6 Amp.||EUR 21.37||Order Now
|V300 SE Complete amplifier kit with ZAPpulse 2.3SE||EUR 600.81||Order Now
|Taking DIY to the next level!|
Measured with +/- 65V DC rails unless otherwise noted.
|Output Power in 8 Ohms||200||Watts
|Output Power in 4 Ohms||400||Watts
|Output Power in 2 Ohms||750||Watts
|Output Power in 1 Ohm (+/-58V 20-20.000 Hz)||1000||Watts RMS|
|Peak Current @ 0,6 Ohms (Protection off)||100||Amperes 1mS|
|THD|| < 0,2% ||8 Ohms Nom.
|THD||0,04%||1 Watt RMS|
|Frequency Response||0 - 150.000||Hz +/-
|Input Impedance||17||kOhm +/-
|Output Impedance||5,5||Milliohms (70
|Supply Voltage||35 - 75||Volts DC
July 2004: About one month ago I started using your digital amps, they are used together with a
transformer of 2x 27V which was just at hand, 2 bridge rectifiers 600v/ 35 amps and 4x 50.000 uF for the
entire amplifier, i love listening to CD's again. Last weekend i was able to compare the amplifier with a
Spectral DMA 150 II, this amplifier is often preferred with Avalon loudspeakers and MIT cable, i like the
sound of this amp very much. I must say and also the owner of the Spectral agrees that the differences
between the two amps are very small, I even feel that if it gets very loud your digital modules sound
quieter and have more control. Although my power supply only produces 2x 38 volts DC and thus gives a max
power of about 85 watts in 8 ohms it sounds much more powerful, it always has plenty of control and
sounds never stressed. Later that night a user of a Hovland amp also came to listen, he also was very
impressed and ranked your digital amp in the same league as the Hovland, he found the sound was very
rhythmic and a touch on the warm side. Both amplifiers, Spectral and Hovland cost €12.500,= each, i spent
€700,= on my L C Audio power amp, can You imagine how happy i am with your amplifier modules? If a user
wants to get the best from the LC Audio amplifier, it is preferred to have it warmed up for about 1.5 to
2 hours, it only consumes 62 watts total for power supply and modules in idle state, furthermore the best
RCA jacks and loudspeaker binding posts should be used, i still had them so they cost nothing, the
cabinet was homemade from aluminium sheet. I use the to my knowledge best volume control available, the
DACT 24 step attenuator (also a Danish product), they cost a bundle but sound perfect. If i had to buy
all the already available parts, the cost for the total amplifier would still be very reasonable compared
with what you get.
Best regards, R Fens from the Netherlands
I finished my Zap amplifiers. I used a 1000 VA transformer and 4x 33000µF capacity per channel. The
amps turn on 2x 45 Volt DC. (The transformers were from an older project)
I use the amps on my Scintilla's and they are still in 4 Ohm setting, I will change this later. But the
most important is the sound. Impressive !!!! High and Mid are as sweet as an tube amplifier! I was always
thinking the amps give the best off to worlds , the sweet sound from tubes and the power from an
transistor amp. Also the soundstage is very good! In the future I’m gonna buy a second pair so I can Bi-amp
Kind regards Guido
Massive power at an extraordinary price!
We have designed the ZapPulse 2.2 module to accommodate most uses in top line home audio systems. The
sound quality is on
the level of the best analog power amplifiers available, but as other amplifiers largely depending on the
quality of the
power supply capacitors.
Cooling of the modules is relatively uncalled for. For most uses you can simply mount the module on a
small aluminium or
other metal. Even the bottom plate of a normal 1 mm sheet metal enclosure will do fine. This is one of
the reasons that a
complete high power amplifier, will build for incredibly low cost. Heat sinks for a normal high quality
an essential part of the total cost of the amplifier, together with the overhead of precious power supply
carry those excessive watts of loss power, which would in other amplifiers be set off in the heat sinks.
These two items
are taken out of the total price tag of a PWM amplifier. Expensive heat sinks and excessive power supply
capacity is simply
not necessary. Successive this leads to the possibility to design a smaller enclosure, not depending on
Completely new ways of thinking the audio power amplifier is possible!
ZapPulse is based on an integrating modulator, similar to that of any other brand of PWM or ´Digital´
amplifier. Some makes
of this type of amplifier will tell you that they are NOT using PWM technology, and they have invented a
special way of building a switching amplifier. This is an old marketing trick, as have been seen in the
audio business for
decades. We believe the new order of audio enthusiasts demand a true and honest information about any new
product, as the market
holds more and more new options to choose from. We have analyzed several different of our competitors
technology, and they work surprisingly alike, even if
there are obviously small deviations in the actual circuits.
So what differentiates our product from the competitors? We use Audio Grade parts, to build our amps.
Especially capacitors and resistors are
chosen with great care, as these parts have a profound influence on sound quality in any design.
We use ultra fast audio grade opamps in the integrator, we use high grade polypropylene capacitors to
power rail filtering and output
filtering. We use a low distortion ferrite coil with about 5 times higher saturation point than our
The result is a super high efficient amplifier, that even in the standard implementation surpasses the
sound quality of
most conventional amplifiers. The sound is soft, and with a touch of tube like warmth in the voice range.
property of the ZapPulse is the capability to expand the sound stage. When you increase the power level,
amplifiers tend to narrow the soundstage, and get a more aggressive midrange, and less resolution in the
mid and top
A ZapPulse (like most other PWM amplifiers) have the ability to maintain the same soundstage, dynamic and
midrange resolution at
both high and low power levels. This is what HiFi reviewers label the amplifiers capabilities of
soundstage expansion. On this field ZapPulse
is extremely capable, and always makes a highly dynamic and precise soundstage, never with aggressive
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