Single-Ended Tube Amps

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

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 ) 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 88db/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. A 2A3/300B switch is equipped in this unit to let customer choose between 2A3 / 300B output tubes.  

This version is the Universal tube version (2A3 / 300B possible) , 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.

 

Specifications
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 Depend on type of power tubes being used due to non -ve feedback design
 
Phase non-inverted
manufacturing hand-wired point to point
Tubes used 2 x 6SL7 + 2 x 6SN7 + 2 x 300B EH + 5U4G
Output power /ch 8Wrms pure class A, single-ended

option : Tube model 50 need 7.5V filament transformer upgrade

1 year parts and labor warranty, tubes 90 days under normal operation conditions
standard chassis : Gold/ Black/Metallic  MDF , Aluminum chassis

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

 



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