"...The SS300B-25V was such a brilliant amp, it had this sweet, emotional vocal tone you just don’t hear from most amplifiers. But we've decided to fully focus on the full-range speaker market, so sadly, we had to let the 25V go..."
We're sticking to our philosophy: to build only ONE, and the very BEST amplifier, made solely to drive full-range speakers..."
MSRP DISCONTINUED
Rediscover the Emotive Power @ 25W
Designs
A rare and long-lost Single Ended design reemerges, featuring an output stage compelled into Pure Class A operation. Despite technological advancements rendering it obsolete due to power efficiency issues, many enthusiasts have endeavored to recreate it, but struggling to mitigate circuit oscillation for optimal functionality.
Not everyone need to playback at more than 10Watts, and here's our SS300B-25W
Built:
Core SS300B Single Ended class A topology
+/-25Vdc @ ~1.5A Optocouplers tracking biased
Dual Mono, stereo Design
Fully Discrete
Lateral Mosfets Output Driver
Ultra low noise Jfet Input
AC Coupled Input
DC Coupled Output
DC Servo
Non-Inverting Output
Current Feedback
Single Stage
+20dB Gain
Mu-Follower Current source
5.2kg 350VA Noratel XQ Extreme Quiet Transformer
Unbalanced input for both RCA & XLR
~25Wrms @ 8 ohm
~195W Power consumption
CRC Power Filter Stage
~1.5Vdc DC offset speaker protection
Relay Protection On Speaker Output
110/120, 220/240Vac / 50hz Input.
Zin @ ~100kohm
~0.015% THD+N @ 1W
Zout @ ~1ohm to Positive swing, 0.1ohm to Negative swing.
Download the User Manual Here
Product Warranty
SE CLASS A
PURE SIMPLICITY
No push-pull complexity, no over-engineered trickery. Just a pure, single-ended design, similar to the legendary SET 300B tube amplifiers cherished by audiophiles. It runs in Class A, meaning it’s always ON and always ready, giving you that warm, rich, and lifelike sound that audiophiles crave.
Unlike Push-pull, At its heart is a single MOSFET, doing the heavy lifting, much like a dedicated performer on stage, delivering every musical detail to your speakers. Class A operation tracked by an active constant current source, it ensures a smooth, unwavering flow of power, no sudden dips or spikes, just steady, crystal-clear sound.
Terms
The small signal goes into a single ultra-low-noise, high-Zin JFET, which pulls and introduces a higher voltage signal, feeding it into a single power MOSFET. The power MOSFET then drives the connected load, with the help of an active current source that keeps the power MOSFET always operating in the Class A region.
While the circuit operates within a very elegant loop to maintain stability, simply unmatched by any other in the market.
