Single-Ended Tube Amps

Model no: SE-300B-Super / SE-300B-Super-Mk2
$3,880 / $3,380 Direct Order Price

SE-300B-Super : 8W x 2 single-ended power amplifier with balanced input

This is one of our state-of-the-art single-ended power amplifiers, using the most common 300B (or 2A3 , 45 , 50..etc ) medium power tube as the output section. A high grade silicon-steel 15W single-ended output transformer is used to ensure the highest sonic quality. This amplifier can drive speakers with efficiency above 85db/W, or it can used as the second amp to drive the tweeter section of a bi-wired speaker system.

The XLR balanced input in this unit can further enhance the depth and width of the sound stage by 20-30%, with additional air and solidity in the bass control. Definitely an up-grade from the RCA input version.

A 4ohm or 8-16 ohm selectable output switch is featured for correct impedance matching to almost any speaker. 16ohm speakers can also use the 8 ohm output setting for increased performance.

The 300B has a very sweet and transparent characteristic which makes it very suitable for classical music, vocal, and jazz reproduction. 

This is the Universal tube version, 3.5K/5K of transformer primary impedance can be selected to get optimum performance for different power tubes. Also equipped with L and R channel gain balance control to balance any un-even gain of tubes (very important when use NOS tubes) , active high-pass filter mode can be set to use in Bi-amp system to prevent low frequency power waste, so 8W can sound like 20-30W if only drive the mid-hi section of the speakers.

SE-300B-Super-Mk2 version :


 This is the stripped feature version of the above regular model, just comes with 6SL7 x 2 + 300B x 2 (or 2A3) + 5U4G rectifier. With fully balanced XLR + RCA inputs. 2A3 / 300B selector, hum adjustment knob for each tube. Self-bias design no need for bias calibration. With lower price tag but same superior performance.

No. of inputs 1 set of RCA inputs  + 1 set of XLR balanced inputs
No. of outputs 1 set of speaker outputs ( 4 or 8/16 ohm selectable )
Freq response 10Hz - 50Khz (-3db) typ
S/N better than 85 db
Distortion < 0.5% at 1Wrms 8ohm
Phase non-inverted
manufacturing hand-wired point to point
Tubes used

2 x 6SL7 + 2 x 6SN7 + 2 x 300B EH + 5U4G (Regular version)

2 x 6SL7 + 2 x 300B EH + 5U4G (Mk2 version)

Output power /ch 8Wrms pure class A, single-ended


1 year free parts and labor warranty, tubes 90 days under normal operation conditions, mishandle and physical damage not included.
standard chassis : Gold/ Black/Metallic  MDF , Aluminum chassis

(optional chassis : Mirror steel, black piano , solid-oak )


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