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Zesto Audio Andros PS-1 User manual

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Zesto Audio 2011
Andros PS-1
Vacuum Tube Phonostage Preamplifier
Owner’s Manual
Please read carefully before
installing and operating this equipment
Zesto Audio
3138 Calle Estepa
Thousand Oa s, California 91360
805-807-1840
www.zestoaudio.com
george@zestoaudio.com
Made in the USA
Using US and mported Parts
Zesto Audio 2011 2
Dear Music Lover,
I wanted to personally than you for your purchase of my Andros PS1
Phonostage.
I have loved music all my life – as a musician, record producer and
audio engineer. That ma es me fussy about sound. That’s a good
thing.
Each unit is built by hand with precision and pride to produce the most
enjoyable listening experience for you.
I am proud to put my name on it and honored to share this with you.
Wishing you many happy years of listening!
Sincerely,
-- George Counnas, President of Zesto Audio
FYI:
Zesto is Gree for hot
Andros is a Gree island and the home of my grandmother’s family.
Zesto Audio 2011 3
.Table of Contents
Thank You $$$$$$$$$$$$$$.. Page 2
Table of Contents$$$$$$$$$$$$ 3
What’s in the box$$$$$$$$$$$$ 3
Warning and Caution$$$$$$$$$$. 4 - 7
Parts and Controls$$$$$$$$$$$. 8 - 9
Specifications $$$$$$$$$$$..$. 10 - 11
Hookup, Settings and Adjustments$$$.. 12 - 14
Tips and Tricks $$$$$$$$$$$$. 15
Warranty nformation$$$$$$$$$.. 16
What’s in the box
Andros PS1 Phonostage
4 Vacuum Tubes
White glove for handling tubes
IEC power cable 6’
Optional ground wire for turntable
Not Included: Interconnect cables
Zesto Audio 2011 4
Warning and Caution
WARN NG: The triangle with the lightning flash symbol displayed on
the unit advises the user of dangerous uninsulated voltage inside the
product’s enclosure.
CAUT ON: To reduce the ris of electric shoc , do not remove the cov-
er. There are no user-serviceable parts inside; it is recommended that
only qualified personnel service this component.
1. OWNER’S MANUAL: Before powering up the equipment, read all
safety and operating instructions and follow them as instructed.
Retain the safety and operating instructions for future reference.
2. ATTACHMENTS: Use only those attachments recommended by the
unit manufacturer, as others may cause hazards.
3. ACCESSOR ES: Do not place the unit on an unstable cart, stand,
tripod, brac et, or table. The unit may fall, causing injury to a per-
son or damage to the unit. Mount the unit according to the manu-
facturer’s instructions with the suggested mounting accessory.
4. WALL OR CE L NG MOUNT NG: Do not mount the unit on a wall or
ceiling.
5. WATER AND MO STURE: Do not use the unit near water (for exam-
ple, near a swimming pool, bath tub, wash bowl, itchen sin , or
laundry tub) or in a damp environment (li e a basement or outside
in the rain).
6. OBJECT AND L QU D ENTRY: Do not push objects of any ind into
the unit through openings as they could touch dangerous voltage
points and short-out parts, possibly resulting in a fire or electric
shoc . Do not spill liquid of any ind on the unit. If water or any
metal object (such as a paper clip, coin, or staple) accidentally falls
inside the unit, disconnect it from the AC power source immediately
and contact Zesto Audio for further instructions.
7. HEAT: Position the unit away from heat sources such as radiators,
heat registers, stoves, or other units (including amplifiers) that pro-
duce heat.
Zesto Audio 2011 5
8. VENT LAT ON: Slots and openings in the enclosure create
ventilation to protect the component from overheating. All of
these openings must remain unobstructed. Allow at least six
inches of clearance above the unit, 0.5 inch below and an
opening behind the unit for airflow. Do not place the unit on a
bed, sofa, rug, built-in boo case, or rac without adequate
ventilation.
9. GROUND NG OR POLAR ZAT ON: As a safety feature, the
unit may be equipped with a polarized alternating current line
plug in which one blade is wider than the other and has an
additional grounding blade. This plug will fit into the power
outlet only one way. If you cannot insert the plug fully into the
outlet, try reversing the plug. If the plug still will not fit, contact
a licensed electrician to update your outlet. Do not defeat the
safety purpose of the polarized plug.
10. POWER SOURCES: Operate the unit only from the power
source indicated on the mar ing label on the bac of the unit.
If you are unsure of the type of power supplied to your home,
consult your unit dealer or local power company.
11. POWER CORD PROTECT ON: Arrange power supply cords
so that they do not suffer from foot traffic or pinching by items
placed on or against them. Pay close attention to cords where
plugs enter the AC outlet and where they exit from the unit.
12. L GHTN NG: For added protection during a lightning storm or
when the component is idle for long periods of time, unplug
the unit from the wall outlet. This will help protect the unit from
lightning and power line surge damage.
13. POWER L NES: Do not locate an outside antenna system in
the vicinity of overhead power lines or other electric light or
power circuits. When installing an outside antenna system,
ta e extreme care to avoid touching the power lines or cir-
cuits; contact with them could be fatal.
Zesto Audio 2011 6
14. OVERLOAD NG: Do not overload wall outlets, extension cords,
or integral convenience receptacles as this increases the ris of
fire or electric shoc .
15. REPLACEMENT PARTS: When replacement parts are required,
be sure the service technician has used replacement parts speci-
fied by the manufacturer or those having the same characteristics
as the original parts. Unauthorized substitutions may result in fire,
electric shoc or other hazards.
16. SAFETY CHECK: Upon completion of any service or repairs to
the unit, as the service technician to perform safety chec s to
ensure the unit is in proper operating condition.
17. MPORTANT SAFETY NOTE:
• Before connecting a new product such as the Andros Phono-
stage I to your audio or home theater system, turn off all oth-
er equipment (preferably unplugging them from the AC power
source). Many audio components feature automatic turn-on
circuits that may activate during an installation, potentially
causing damage to electronic components or spea ers. This
type of damage is not covered by product warranties, and
Zesto Audio specifically disclaims responsibility for any such
damage.
• Power Cord: The removable IEC power cord provided with your
unit was specifically designed for use with this product, but
other AC cords may be used. Consult your dealer for advice
on AC power cords and high quality wire in your system.
• AC Fuse: The fuse is located inside the IEC power entry con-
nector and is not user serviceable. If the unit does not power
up, contact an authorized service representative.
• Wiring: Cables running inside walls should have the appropri-
ate mar ings to indicate compliance and listing by the UL,
CSA or other standards required by the UL, CSA, NEC, or
your local building code. Questions about cables inside of
walls should be directed to a qualified custom installer, li-
censed electrician, or low-voltage contractor.
18. RECORD NG COPYR GHT: Recording of copyrighted material
for other than personal use is illegal without permission of the
copyright holder.
.
Zesto Audio 2011 7
19. FCC NFORMAT ON FOR USER:
• CAUT ON: Any changes or modifications not expressly ap-
proved by Zesto Audio could void the user's authority to op-
erate the equipment.
• These limits are designed to provide reasonable protection
against harmful interference in a residential installation. This
equipment generates and can radiate radio frequency ener-
gy, and if not installed and used in accordance with the in-
structions it may cause harmful interference to radio commu-
nications. However, there is no guarantee that interference
will not occur in a particular installation. If this equipment
does cause harmful interference to radio or television recep-
tion, which can be determined by turning the equipment off
and on, the user is encouraged to try to correct the interfer-
ence by one or more of the following measures:
• Reorient or relocate the equipment.
• Increase the separation between the equipment and
receiver.
• Connect the equipment into an outlet on a circuit differ-
ent from where the receiver is connected.
Zesto Audio 2011 8
Power ON/OFF switch . Turns the unit ON/OFF (located on side panel).
IEC Power entry connector  110/120V AC power input.
Ground binding post/banana soc et  The main ground point for turntable.
RCA Output (Left and Right)  The main output going to your system.
RCA Moving Magnet (MM) Input (Left and Right) .. A possible turntable input.
RCA Moving Coil (MC) Input (Left and Right) . A possible turntable input.
XLR3 Balanced MC Input (Left and Right) .. A possible turntable input.
MM/MC selection switch (Left and Right) . Selects between the MM/MC inputs.
MC High/Low Output switch (Left and Right) .. Selects the volume for MC cartridges.
Ground ON/OFF switch (Left and Right) . Connects or disconnects the ground to the MC input.
MC Load rotary switch (Left and Right) Correctly tunes your MC cartridge.
Rear Panel nputs and Controls
Zesto Audio 2011 9
Specifications
nputs per channel
• Separate MM and MC inputs
• MM/MC switch
• MM impedance 47K Ohms
• MM capacitance 100pf
• MC Unbalanced ground isolated RCA or Balanced XLR3F
• MC ground on/off switch
• MC load impedance adjustable 1000, 400, 200, 100, 50, 40, 30
20 Ohms
• MC Internal step up transformers
• MC High/Low switch with -10dB gain for high output MC
cartridges
Outputs per channel
• Impedance 10K ohms
• -10 dB Vu output level
Power
• Ground binding post
• Power consumption 27W , 0 drain when off
• Voltage 110/120V AC 60Hz
(optional factory installed 240V AC 50/60Hz)
• Standard 3 pin IEC power connector
• ON/OFF power switch conveniently located on the front side
• Two internal high quality linear regulated power supplies
250V and 12V
Zesto Audio 2011 10
Active Components
• Four (4) Gold pin ECC83S vacuum tubes
• High quality ceramic soc ets
Detailed Specifications
• Gain MM input 45dB
• Gain MC input 65dB
• Noise - 75dBu
• Frequency response complies to 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
• Each unit is made 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.