price： $3500/pair

shipping：$200 （fedex）

contact me change price if you need them.

pair TANGO Single output transformer X-2.5SNF（NO.10495）40W for 300B px25 2A3 Original .

Resistance and insulation have been tested OK.will send test phoyos to buyer before shipping.

with NF winding.

20Hz to 80KHz.

better than X-2.5S.

It is the top 300B output transformer. It is the customized product of Tango's heyday, and the quantity is rare. It is made of permalloy core. Tango is said to have an 80% nickel alloy core with excellent permeability. It is especially good at processing high-frequency and low-frequency signals, but also can present more detailed signals. If you want the best audio equipment, this transformer is right for you.

It will be packed professional as fragile products.

Please be assured of the purchase.