Zesto Audio Bia 120

Selling a very nice Zesto Bia 120 stereo amp.  Class A full tube.  If you have never experienced how much control a tube amp can have this is the one.  I circled a spot in one of the photos where there’s a little spot.  It’s not very noticeable but there none the less.  Ships in manufacturer packaging  

Design Philosophy

With my pro audio background in the recording studio and live concert mixing,
I wanted to build an amp that allowed me to hear music the way I know it should sound.

I wanted it to be easy to use, reliable and with plenty of power to drive the speakers. In short,
I wanted power without compromising the music.

Class A Design

The tubes are always on, so you have power when you need it. Class A is fast and responsive. There is no lag, providing your music more punch, transient response, better dynamic range and transparency.

Circuit Topology

I choose a Class A Ultra-linear, Push-Pull circuit design to deliver the most precise, enjoyable and faithful reproduction possible.

Unsung Hero

The unsung hero of a power amp is its power supply. That’s why my design incorporates a custom Toroid power transformer and a choke-based, dual-mono power supply to deliver
all the “slam” you can handle.

Easy to use

With Auto Bias, you need no adjustments. It’s safe, consistent and the settings are always perfect so you can enjoy your music.

What is Bia?

In Greek mythology, Bia is the Titan Goddess of force and power.

Output

• Pure Class A
• 60 Watts per channel
• 4, 8 and 16 Ohm output taps
• 8, 5 and 4 Amp Slow blow fuses for outputs
• Eight 5 way binding post
• Non inverting output polarity
• Push-Pull and Ultra-Linear design

Inputs

• RCA single ended inputs Left and Right with an impedance of 100K Ohms
• Transformer floating XLR balanced inputs Left and Right (pin 2 hot)
  with an impedance of 12K Ohms
• Independent ground lift switches on left and right balanced inputs
• 2 Volts RMS input to reach rated output

Detailed Specs

• Dual Mono
• Auto bias
• No negative feedback
• Frequency response 20Hz to 50Khz ~ 2db
• Total Harmonic Distortion ~ 0.22% at 1W output into 8 Ohms
• Gain of 23dB
• Noise level > 0.2 mV RMS into 8 Ohms with input shorted
• 1% metal film resisters throughout
• Polypropylene capacitors throughout the audio path

Power

• Custom Toroidal power transformer with global mains
• Choke based power supply design
• 120 Volts AC mains
• Optional factory installed 220V, 230V, 240V 50/60Hz
• Power consumption at rated output 300 Watts
• On/Off switch conveniently located on front panel
• 3 pin IEC power connector with fuse

Active Components

• Matched quad set of four (4) KT88’s vacuum tubes
• Four (4) Gold pin ECC82s (12AU7) vacuum tubes
• High quality gold pin ceramic sockets

Other Features

• Each unit is made by hand
• 50 hour factory burn in on all circuits and vacuum tubes
• Dimensions 17″ W X 20″ D X 10 ” H
• Weight 66 lbs. (30Kg)
• 16 and 14 gauge Zinc plated steel enclosure