Zesto Audio Bia 200 Select Class A Stereo Power AmplifierZesto Audio Bia 200 Select Class A Stereo Power Amplifier Modern Tube Design for the 21st Century Listener Bia 200 Select Class A Stereo Power Amp 100 Watts per channel with a 3 Position Bias Switch Key Features The Bias Select switch is engineered with 3 bias settings for 4 different output tube Compatible with KT88, KT120, KT150 and KT170 output tubes Bias Select switch is easy to use, change on the Fly so you can hear the difference Auto Bias is

Zesto Audio Bia 200 Select Class A Stereo Power Amplifier

Modern Tube Design for the 21st Century Listener

Bia 200 Select Class A Stereo Power Amp

100 Watts per channel with a 3 Position Bias Switch

Key Features

• The Bias Select switch is engineered with 3 bias settings for 4 different output tube
• Compatible with KT88, KT120, KT150 and KT170 output tubes
• Bias Select switch is easy to use, change on the “Fly” so you can hear the difference
• Auto Bias is safe, consistent and settings are always perfect
• Class A power is fast for a more lively, immediate response to your music
• 4, 8 & 16 Ohm taps gives you options for your speaker preference
• Dual Mono gives you less cross talk and better stereo imaging
• Choice of high quality gold plated Single Ended RCA or Balanced XLR connectors to suit your needs or cable preferences
• True transformer differential balanced XLR inputs for the best noise rejection
• Independent Left and Right ground switches on the XLR balanced inputs to eliminate ground loops and hums
• No Negative Feedback design does not modify or compress the musical signal
• Large custom Toroid is higher voltage for increased performance and lower noise
• Global mains power supply can work all over the world
• Provides plenty of gain for your system
• Push-Pull/Ultra Linear circuit design provides lower distortion, more power, and a better performance out of your tubes
• Low noise levels allow really dark black quiet musical passages
• Non-inverting polarity retains the same phase as the input (so your trumpets blow and don’t suck)
• Gold pin sockets are more reliable because gold doesn’t oxidize when it heat cycles
• Matched quad KT150 output tubes retain the stereo balance and lower noise
• Elegantly designed, heavy duty 14 &16 gauge zinc plated steel enclosure to accommodate the extensive grounding scheme
• The optimized frequency response provides the best musical range to benefit the natural harmonic structure of the instruments
• All fuses are easily accessible
• Each unit is hand built “Made in the USA”

Specifications (based on KT150 tubes)

Output

• Class A
• KT150 = 100 Watts per channel into 8 Ohms
• 4 Ohm, 8 Ohm and 16 Ohm output taps
• 10A, 7A and 5 Amp 6mm x 32mm Slow-blow speaker fuses for outputs
• Eight 5-way binding posts
• Non-inverting output polarity
• Push-Pull Ultra-Linear design

Power rating for Auto Bias Select Switch Settings

Left Position:

• KT88 = 60 Watts per channel,
• KT120 = 60 Watts per channel
• KT150 = 60 Watts per channel
• KT170 = 60 Watts per channel

Middle switch position:

• KT120 = 85 Watts per channel
• KT150 = 85 Watts per channel
• KT170 = 85 Watts per channel

Right switch position:

• KT150 = 100 Watts per channel
• KT170 = 100 Watts per channel

Inputs

• Transformer floating ground differential balanced XLR inputs
• Left and right balanced inputs (pin 2 hot), impedance 10K Ohms
• RCA single ended inputs Left and Right with impedance of 47K Ohms
• Independent ground lift switches on left and right Balanced inputs
• 5 Volts RMS input to reach rated output

Detailed Specs

• Dual Mono
• Auto bias
• No negative feedback
• Frequency response 20Hz to 30Khz ~ 3dB
• Total Harmonic Distortion ~ 0.22% at 1W into 8 Ohms
• Gain of 24dB
• Noise level > 2mV -RMS into 8 Ohms with input shorted
• 1% metal film resisters throughout
• Polypropylene capacitors throughout the signal path

Power

• Custom Toroidal power transformer with global mains
• 15 Amp IEC power mains connector
• 120 Volts AC mains with 8 Amp 5mm x 20mm slow blow fuse
• Optional factory installed 220V, 230V/240V 50/60Hz with 4-amp slow blow fuse
• Power consumption at rated output 517 Watts
• Front panel on/off switch with green LED indicator for high voltage and amber LED for low voltage

Active Components

• Matched quad set of four (4) KT150’s vacuum tubes
• Four (4) Gold pin ECC82 (12AU7) vacuum tubes
• High quality gold plated 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 64 (29Kg)
• Shipping box = 27” x 27” x 13” (5 cm x 68.5 cm x 33 cm)
• Shipping weight: 80 pounds (36 kg)
• 16 and 14 gauge Zinc plated steel enclosure
• Two year limited warranty
• Six months warranty on Vacuum Tubes