OTOMON LAB 6L6 drive 71A/45/2A3/300B compatible tube amplifier monoblock Zero NFB ( All AC heater)

Prestage tube is 6SN7, driver tube is 6L6

This is prototype version, if you order the same one, all transformer will be new TANGO(ISO) transformers.

Price is not included tubes and shipping fee.

Price for order made is 3350USD, the prototype version used all Hirata TANGO transformers. All transformers are vintage ones and it has scraches, dust and rust but function is guranteed.



To get more analog sound for the amp, all heater of tubes are AC heater. AC heater will make the more hum in speaker output but it make sound warmer and more analog. 6L6 was driven by plate choke to get better low frequency.

The hum as using 300B for this amp is 0,5mV which is very low and can be used with high sensitive speaker without any problem. Hum of 2A3,45 and 71A is as low as another tube, around 0.1 ~ 0.3mV, very quiet.

You can enjoy 4 type of power tubes, changing tubes and see the difference in sound.

Specification:

Response frequency : 20Hz ~ 25KHz
Hum level: 0.5mV (300B), 0.1~0.3mV (71A, 45, 2A3)
THD: 0.5% 1W (300B)