The design philosophy behind the SS300B-25
#1: The Balance Between Output Power & Sound Quality
#2: The Incredible Advantages of Single-Ended Class A Amplifiers
#3: The Tremendous Benefits of Current Feedback Over Voltage Feedback
#4: The Unmatched Benefits of JFET Input Over BJT
#5: The Outstanding Benefits of DC Coupled Over AC Coupled Speaker Output Stage
#6: The Tremendous Benefits of Adding a DC Servo into a DC Coupled Amplifier
Conclusion: Achieving Amplifier Excellence
#1 - The Balance Between Output Power & Sound Quality
We simply vote for Quality > Quantity. The SS300B power is optimized for a pair of ATC SCM20PSL in a 10ft (width) x 20ft (length) room, 25W with maximum possible sound quality.
It is drawing a healthy 200W consumption continuously for a stereo 25W@8ohm output. Having extra Class A biasing up to 500W or even 1000W power consumption is utterly waste of electricity for a low level listening environment.
#2: The Incredible Advantages of Single-Ended Class A Amplifiers
You want an amplifier that’s not complicated, right? Simplicity, minimalism, and straightforward design, unlike modern Class-Ds built like a vehicle with square wheels and a superb but complicated suspension system.
Single-ended amplifiers produce even-order harmonic distortion, resulting in a lush, warm, musical, and pleasing sound. People love it. Push-pull amplifiers cancel out those harmonics, so you just don’t get that same engaging sound. Single-ended is the way to go, believe me. They run in pure Class A mode all the time—no switching, no nonsense—just consistent, high-quality audio and dependable performance.
Here’s the thing: these Single Ended amplifiers don’t need much negative feedback. Negative feedback can mess things up by introducing phase shifts and other problems. Single-ended designs keep the audio signal pure. It’s amazing.
So, while push-pull Class A amplifiers have their place with power and efficiency, single-ended Class A amplifiers are the real winners here: simplicity, superior sound quality, and a musical harmonic distortion profile.
#3: The Tremendous Benefits of Current Feedback Over Voltage Feedback
Current feedback amplifiers have a tremendous slew rate. These amplifiers handle transients like nobody’s business. Sudden changes in the audio signal? No problem. The music stays lively and keeps its impact. For sharp, percussive sounds or fast-paced music, current feedback is the way to go. It’s simply better. The SS300B captures these nuances perfectly, making every note count.
They have less phase shift, which means better phase coherence across the frequency spectrum. You get better clarity and better spatial imaging. The soundstage is precise and immersive. You’ll love it. The SS300B ensures that your audio remains phase-coherent, providing an immersive listening experience.
Here’s another big one: lower distortion. Especially at high frequencies, current feedback amplifiers are just cleaner. The feedback mechanism is less prone to the issues that voltage feedback designs have. You get a more accurate sound. It’s beautiful. The SS300B shines here, delivering clear, distortion-free audio.
So, while voltage feedback has its place, current feedback is the winner. Slew rate, transient response, phase coherence, distortion levels, stability, and design flexibility—current feedback amplifiers have it all. They’re the best choice for superior performance and fidelity, and the SS300B exemplifies this perfectly.
#4: The Unmatched Benefits of JFET Input Over BJT
JFETs have incredibly high input impedance. This is huge, folks. It means they don’t load down the signal source, giving you a pure, clean signal with no interference. BJTs just can’t compete with that. JFETs keep it pure and simple.
JFETs are super quiet, generating very low noise compared to BJTs. This is crucial for high-fidelity audio applications. You want clarity and detail, and JFETs deliver that. BJTs bring more noise to the party. The SS300B takes advantage of JFETs’ low noise to provide crystal-clear sound.
Linearity is key, folks. JFETs offer excellent linearity, meaning the output signal is a true representation of the input. This translates to better sound quality and more accurate audio reproduction. BJTs can struggle with linearity. JFETs are simply better.
JFETs are rock solid when it comes to thermal stability. Class A kind of heat? No problem. They stay stable. BJTs can be sensitive to temperature variations, which can affect performance. JFETs keep it steady, no matter what.
When it comes to handling weak signals, JFETs are the champions. They amplify small signals with great accuracy. BJTs can add distortion when dealing with low-level signals. JFETs keep the integrity of the signal intact. It’s beautiful. The SS300B excels in amplifying weak signals, ensuring every detail is captured.
#5: The Outstanding Benefits of DC Coupled Over AC Coupled Speaker Output Stage
Here’s the thing: DC coupled stages offer extended low-frequency response. You get those deep, rich bass notes. AC coupling can roll off the low end because of the capacitors, causing you to lose some of that bass impact. DC coupling gives you the full spectrum, from the deepest lows to the highest highs. It’s amazing.
Transient response, folks. DC coupled stages excel here. They can reproduce fast, sharp transients with precision—no phase shift, no delay. AC coupling, with those capacitors, can introduce phase shifts that smear transients. DC coupling keeps it tight and accurate.
DC coupling also offers improved phase coherence. The signal stays in phase across the entire frequency range, resulting in better imaging and a better soundstage. AC coupling can introduce phase anomalies. DC coupling keeps everything aligned, which is fantastic for audiophiles who crave precision. The SS300B ensures that your audio remains phase-coherent, providing an immersive listening experience.
Single-ended with DC coupling? Really rare in the market.
#6: The Tremendous Benefits of Adding a DC Servo into a DC Coupled Amplifier
Adding a DC servo is like having an automatic offset correction system. No more manual adjustments, no more hassle. The DC servo continuously monitors and corrects the DC offset, keeping the output centered at zero volts. This is fantastic for maintaining stability and performance. Without it, you might have to constantly tweak things. The SS300B’s DC servo does it all for you.
Let’s talk about sound quality. A DC servo improves it, no doubt. By eliminating DC offset, you reduce the risk of distortion and interference, resulting in cleaner, clearer audio. You get the purest sound possible. Audiophiles love this. They crave crystal-clear sound, and a DC servo delivers it. The SS300B benefits from this, providing audiophiles with the ultimate listening experience.
Efficiency is key. DC servos help your amplifier run more efficiently. By keeping the DC offset at zero, you ensure that all the power goes into driving the signal, not correcting offset issues. More power for your music, less wasted energy—it’s a win-win. The servo system inside the SS300B makes every biased current count.
With a DC servo, design adjustments are simpler. You don’t need to add complex manual offset adjustments or constantly worry about drift. The DC servo takes care of it automatically. This means your design can be cleaner, simpler, and more reliable. Engineers love this. The SS300B’s design simplicity ensures reliable performance.
Conclusion: Achieving Amplifier Excellence
JFET input stage, single-ended, current feedback, DC coupled with DC servo—the SS300B amplifier embodies all these principles, delivering unmatched performance and quality. Go and test it out yourself at our nearest dealer's showroom.