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PURIFI-1ET400A STEREO AMPLIFIER CLAAS D
$2,400
Stereo Purifi 1ET400A
1ET400A is a single-channel, ultra-high performance, analog-input Class D Amplifier module capable of over
400W of power at an audio quality level that sets the standard for power amplifiers of any operating class. Its
compact size and high reliability makes it fit a broad range of applications, while its audio quality makes it the
undisputable choice for applications where all the premium is on sound quality.
PURIFI’s continuing research into nonlinear control theory has produced the first mathematically exact largesignal model of self-oscillating amplifier controllers. This breakthrough allows complete optimization of the
feedback circuit and improves performance by at least an order of magnitude over existing implementations.
The amplifier module further incorporates a comprehensive protection system that makes it tremendously
robust and easy to integrate.
These circuits and methods provide many practical and audible benefits:
High loop gain (>75dB) in the entire audio band
o This figure corresponds to an unprecedented 110MHz Gain-Bandwidth Product and produces consistent ultrahigh performance across the audio spectrum unmatched by audio amplifiers of any technology or operating
class.
Negligible intermodulation distortion (IMD)
o A very good measure for how well an amplifier handles complex signals. Sonically low IMD means a highly
resolved and stable stereo image across the whole spectrum, even during very complex and busy passages.
THD remains extremely low at any frequency and any power level right until clipping
o Translates into a total lack of sonic signature, and an ability to reproduce any type of music without
preference for genre or production style.
Negligible output noise
o No audible noise. Deep black silences and a generous and detailed sound even at very low playback volumes.
High power supply rejection ratio (PSRR)
o The module places no particular demands on the power supply quality. A simple off-the-shelf unregulated
SMPS will not degrade audio performance.
Load-invariant frequency response and negligible output impedance
o The amplifier handles difficult loudspeakers with ease, including those that challenge most other amplifiers.
Controlled, second-order low-pass response
o Very flat audio-band response with a sensible, 60kHz bandwidth.
o Reduced sensitivity to out-of-band noise from DACs, reducing the requirements on the DAC reconstruction
filter. This leaves a shorter signal path between DAC and loudspeaker.
o Problem-free operation with outboard DACs over which you may have no control.
Very low idle losses and reduced electromagnetic interference (EMI)
o The enormous loop gain allows relaxed timing of the power MOSFETs without degrading audio performance.
o Idle losses are minimized.
o Very little to no effort needed to pass regulatory tests.
Exceptionally clean clipping and clipping-recovery in both voltage and current domains
o Clips cleanly and recovers immediately without “overhang”. Current limiting is equally instantaneous and glitch
free. This guarantees the smallest amount of audible artefacts when pushed into clipping or overload
protection.
Overall implementation/integration ease saves save time and cost for the system integrator
This concidered as one of the best class D module in the market after Hypex NC500.
This stereo evaluation amplifier build with Purifi modules importaed from Denmark
Channel power- 425W 4R
THD and IMD 0.00017% at 100W 4R
Extra audinarily low noise -11.5uV
Efficiency 94%
Enclosure size 80mm320mm 220mm
weight aprox 5Kg
Picture ellustration purpose only all amplifiers custom build
Only balance input in this stage
IF U DO WINDOW SHOPPING and KEEP ON TALKING ABOUT CLASS D STORIES PLS DO NOT CONTACT ME.
1ET400A is a single-channel, ultra-high performance, analog-input Class D Amplifier module capable of over
400W of power at an audio quality level that sets the standard for power amplifiers of any operating class. Its
compact size and high reliability makes it fit a broad range of applications, while its audio quality makes it the
undisputable choice for applications where all the premium is on sound quality.
PURIFI’s continuing research into nonlinear control theory has produced the first mathematically exact largesignal model of self-oscillating amplifier controllers. This breakthrough allows complete optimization of the
feedback circuit and improves performance by at least an order of magnitude over existing implementations.
The amplifier module further incorporates a comprehensive protection system that makes it tremendously
robust and easy to integrate.
These circuits and methods provide many practical and audible benefits:
High loop gain (>75dB) in the entire audio band
o This figure corresponds to an unprecedented 110MHz Gain-Bandwidth Product and produces consistent ultrahigh performance across the audio spectrum unmatched by audio amplifiers of any technology or operating
class.
Negligible intermodulation distortion (IMD)
o A very good measure for how well an amplifier handles complex signals. Sonically low IMD means a highly
resolved and stable stereo image across the whole spectrum, even during very complex and busy passages.
THD remains extremely low at any frequency and any power level right until clipping
o Translates into a total lack of sonic signature, and an ability to reproduce any type of music without
preference for genre or production style.
Negligible output noise
o No audible noise. Deep black silences and a generous and detailed sound even at very low playback volumes.
High power supply rejection ratio (PSRR)
o The module places no particular demands on the power supply quality. A simple off-the-shelf unregulated
SMPS will not degrade audio performance.
Load-invariant frequency response and negligible output impedance
o The amplifier handles difficult loudspeakers with ease, including those that challenge most other amplifiers.
Controlled, second-order low-pass response
o Very flat audio-band response with a sensible, 60kHz bandwidth.
o Reduced sensitivity to out-of-band noise from DACs, reducing the requirements on the DAC reconstruction
filter. This leaves a shorter signal path between DAC and loudspeaker.
o Problem-free operation with outboard DACs over which you may have no control.
Very low idle losses and reduced electromagnetic interference (EMI)
o The enormous loop gain allows relaxed timing of the power MOSFETs without degrading audio performance.
o Idle losses are minimized.
o Very little to no effort needed to pass regulatory tests.
Exceptionally clean clipping and clipping-recovery in both voltage and current domains
o Clips cleanly and recovers immediately without “overhang”. Current limiting is equally instantaneous and glitch
free. This guarantees the smallest amount of audible artefacts when pushed into clipping or overload
protection.
Overall implementation/integration ease saves save time and cost for the system integrator
This concidered as one of the best class D module in the market after Hypex NC500.
This stereo evaluation amplifier build with Purifi modules importaed from Denmark
Channel power- 425W 4R
THD and IMD 0.00017% at 100W 4R
Extra audinarily low noise -11.5uV
Efficiency 94%
Enclosure size 80mm320mm 220mm
weight aprox 5Kg
Picture ellustration purpose only all amplifiers custom build
Only balance input in this stage
IF U DO WINDOW SHOPPING and KEEP ON TALKING ABOUT CLASS D STORIES PLS DO NOT CONTACT ME.
- Date Listed:10/07/2020
- Last Edited:10/07/2020
- Condition:New
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