AM Hi-End 833s Ultima

833S Ultima Single-ended silver version tube amplifier


Global unique maximum power at present stage

Lasting for 4 years manufacturing and continuous improvement

Whole amps is making with 30 pounds high-purity silver

Output transformer and push transformer all winding with high-purity silver wires

All internal connection wires are making with rectangular silver wires

Each wires is plated with gold

100% handmade

Above information taken from AM Hi-End Website.

Please contact us to discuss further and pricing



  • Tube complement: ECC88, KT150 as the drivers, 833 as the amplifiers .

  • Frequency response: 20Hz-100KHz

  • Input Impedance : 100k ohms

  • Input sensitivity: 1.0Vrms

  • S / N: > 98dB 

  • Input selections: RCA single-ended ; balanced / XLR

  • Power Output: 130w

  • Load impedance: 4 & 8 ohms

  • Power consumption: 400W(each) 

  • Weight: 150Kg per pair

For more information or to purchase this item please contact us here or call us on the number below.


We accept all major credit and debit cards (Excluding AMEX) and direct bank transfer

Tel: 07412690415

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