SMSL VMV A2 Digital PFFB Technology Class-D Power Amplifier

SMSL VMV A2 Digital PFFB Technology Class-D Power Amplifier

1. Display screen
2. Remote window
3. Input source selection button
4. Bluetooth button
5. Standby LED
6. Function knob
7. Power input(100-240V AC)
8. Left speaker output
9. Right speaker output
10. USB input
11. Coaxial input/subwoofer output
12. AEE input
13. Unbalanced line input
14. Optical input
15. Bluetooth antenna

 VMV A2 is a high-resolution desktop power amplifier belonging to the VMV series of premium audio products by S.M.S.L. It is a high-end product equipped with high-quality audiophile-grade components and using revolutionary Digital PFFB Class D amplification technology both of which ensure an industry-leading performance with the VMV A2.

Model Number: VMV A2

>Input Options: USB, Optical, Bluetooth, Coaxial, Balanced Digital, RCA Line IN.  

>THD+N: 0.0008%.  

>SNR: 115dB.  

>Channel Separation: 108dB.  

>Output Power: 200Wx2(4Ω), 100Wx2(8Ω).  

>USB Transmission Method: Asynchronous Transmission.  

>USB Compatibility: Windows 7 & above, Mac OSX, Linux.  

>Bit Depth Support (USB/IIS): Up to 32-Bit/768kHz.  

>Bit Depth Support (Optical/Coaxial): Up to 24-Bit/192kHz.  

>DSD Support: Up to DSD512(USB & IIS).  

>Bluetooth V5.0 connectivity.  

>Bluetooth Codec support: UAT, LDAC, AptX HD, AptX, SBC, AAC.  

>Weight: 2.6Kg. 

 This page explores the current state of Class D amplifiers and highlights how S.M.S.L raises the bar with its new Digital PFFC Amplifier technology.

Minimalist timeless design to meet Multi-demand

VMV A2 use revolutionary Digital PFFB Class D amplification technology - using digital input and passes through ADC, which is not limited by ADC, and at the same time uses excellent power supply. 

VMV A2 only 28*25*4.3cm, but max power match 200W to run any large floor speaker easily. Load-invariant frequency response and negligible output impedance, which made A2 handles difficult loudspeakers with ease, including those that challenge most other amplifiers.This gives A2 more possibilities.

Until S.M.S.L changed the game, Class D amplification was only about compactness and electrical efficiency - but VMV A2 also offers obvious superiority where clarity, resolution and outright musicality are concerned.

Introducing S.M.S.L Digital Loop Amplifier Technology

To address these challenges to great sound, introduces Digital PFFB Amplifier technology. With PFFB, feedback is taken across the speaker terminals, after the output filter. As a result, the feedback accurately reflects how the wired speakers’ impedance is affecting the amplifier’s sound—this is then compared with the input signal and corrected in real-time. The result is a digital amplifier that exactly reproduces the desired output signal for any type of wired loudspeaker, no matter the impedance.

S.M.S.L VMV A2 Creating two solution for Class D shortcomings requires deep innovation.

1.The key breakthrough is an ultra-fast, low-latency analog-to-digital conversion (ADC) of the analog output signal from the speaker terminals back into the digital control loop. The Digital PFFB can achieve speeds of 20 nanoseconds. The result is that the feedback can accurately enter the digital domain and correct any differences from the audio input signal – throughout the entire audio band.

At the same time, VMV A2 using revolutionary digital input and passes through ADC, which is not limited by ADC, that made signal integrity.

2.The employing high loop gain without compromising amplifier stability.
Typical analog amplifier feedback systems can only obtain a low loop gain before experiencing stability issues. Low loop gain weakens the effectiveness of the feedback loop’s distortion and noise-suppression. However, PFFB uses a high digital loop gain that is typically 100 times higher than other amplifiers, without a drop inside the audio band. The effect is that the feedback loop is more effective at cleaning the distortions and restoring the sound to its proper form

VMV A2 Using the Qualcomm Bluetooth solution.

Support UAT/LDAC/aptX-HD/AAC/SBC encoding format and up to 24bit / 192kHz audio

Multiple modes to meet your needs

Built-in multiple EQ modes ( 8 modes ) and treble/bass adjustment function, easy to match various speakers and music.

Subwoofer pre-output

Used to connect active subwoofer speakers to form a 2.1 audio system

Negligible output noise

No audible noise. Deep black silences and a generous and detailed sound even at very low playback volumes.

High-quality hi-fi sound

VMV A2 use revolutionary Digital PFFB Class D amplification technology - using digital input and passes through ADC, which is not limited by ADC, and at the same time uses excellent power supply.

THD remains extremely low at any frequency and any power level right until clipping
Translates into a total lack of sonic signature, and an ability to reproduce any type of music without preference for genres or production style.

That is whats makes A2 such excellent performance, that give customer an enjoyable and convincing listen.

	Using the latest DSP chip with ST high-power amplifier chip, carefully designed and debugged, its distortion is as low as 0.00008% (-102dB)