Zesto Andros II Phonostage


Inspired by RCA’s vacuum tube circuit designs from the 1930s, the Andros has been engineered to bring you the clarity and depth of the original recording.


• The Circuit is specifically designed to provide sufficient amplification to match your cartridge with the rest of your system.

• Each unit is hand built “Made in the USA”.

• 50 hour factory burn in on all circuits and vacuum tubes.

• A low Noise level of -80 dBv below maximum output allows the quietest passages of you music to be heard.

• The output circuit is designed to drive your cables and isolates the output from the influence of the next stage.

• RCA connectors are high quality, Gold plated, recessed with an isolated ground.

• Isolated ground RCA connectors plus the Ground On/Off switch will allow you to choose the best ground configuration.

• Recessed RCA connectors are durable and will hold up to the typical Audiophile who loves to change their configuration.

• All switches and knobs are easily accessible, nothing hidden inside to adjust.

• Two position MM switch 47K and 15K Ohms to accommodate more cartridges.

• 10 position MC load switch from 20 to 1000 Ohms and more in the sweet spot above 200.

• Accommodates both high and low MC output cartridges

• Elegantly designed 16 gauge steel enclosure to help isolate the electronic “chatter” from nearby equipment.

• On/Off power switch conveniently mounted on front side panel

• Easy to read large type on back panel


Inputs per channel

• Separate MM and MC inputs

• MM/MC switch

• MM impedance switch 47K or 15K Ohms

• MM capacitance 200pf

• MC Single Ended RCA with isolated ground or Balanced XLR3F

• MC ground on/off switch

• MC load impedance adjustable 1000, 800, 600, 500, 400, 300, 200, 100, 50, 20 Ohms

• MC Internal step up transformers

• MC High/Low switch with ~ -3dB gain for high output MC cartridges

Outputs per channel

• Impedance 10K ohms

• +8.5V max output level

Active Components

• Four (4) Gold pin JJ ECC83S/12AX7 vacuum tubes with high quality gold pin ceramic sockets


• Newly designed internal power supplies using Toroidal transformers, 1 high voltage 300V and 1 low voltage 12V

• Ground binding post

• Power consumption 24W , 0 drain when off

• Voltage 100 to 120V AC 60Hz

• Optional factory installed 220V to 240V AC 50/60Hz

• Standard 3 pin IEC power connector

• ON/OFF power switch conveniently located on the front side

Detailed Specifications

• Gain MM input 47dB

• Gain MC input 67dB

• Noise – 80dBv below max output level

• Frequency response complies with the original RIAA curve within +or- 0.5 dB

• RIAA curve is achieved using a passive filter

• 1% metal film resisters throughout

• Polypropylene capacitors throughout the audio path

Other Features

• “Made in the USA” using US and imported parts

• Each unit is built by hand

• 50 hour factory burn in on all circuits and vacuum tubes

• Dimensions 17″ W X 12″ D X 5″ H

• Weight 20 lbs.

• 16 gauge zinc plated steel enclosure

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