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Model ZSTAGE

 

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Hand made in the USA and sold customer direct with a lifetime warranty!
Available in 120 or 240 volts.



The Secret to the ZSTAGE's ability to make such a giant difference in the sound quality of your source... is it's gain

By turning it up to 4 or 5 volts and then turning your
preamp
or amplifier down to compensate, you will add great weight, punch and overall power to the presentation... the kind that's just not possible with a standard 2 volt source.


If that wasn't enough, it also has a switch on the front that gives you two distinct signatures - one is a more laid back setting, the other a more aggressive setting... it's like having two different sounding stereos at the flip of a switch.

And the final icing on the cake is the tube itself.  Since no two brands of 12AU7 sound the same, you can do a little tube rolling and find something that personalizes the sound of your rig even more.


So you want a better sounding source?
OPTION A

Take your present source somewhere and have it tweaked, modded or upgraded for maybe a 10% improvement...

OPTION B

Buy a brand new source that costs twice what your present one did and hope for a 25% improvement...

OPTION C

Keep your present source and add a ZSTAGE to it for the biggest noticeable difference in sound of all three options, by far.



DESCRIPTION

The ZSTAGE is a single-ended triode stereo gain stage.  It uses a single tube operating in class A with no negative feedback.  It accepts any standard 2 volt line level source like a CD player or DAC and has a variable output via the front mounted gain control.  It can also be used as a purist tube preamp where multiple inputs are not needed. 

Designed for 24/7 operation it is always on, and always warmed up and ready.  The lower voltages that make this possible aren't even enough to get the tube hot to the touch.  It does however greatly lower odd-order distortion and increase even-order harmonics making everything sound better.




SOME IMPORTANT FEATURES:

The ZSTAGE features a black powder coated steel chassis with a standard IEC connector and removable power cord.  No circuit boards, Hand Made and Available in 115/230/240 volts for world wide compatibility.

The unit is designed with reduced voltages that only operate the tube at half power so there is no heat, and the tube will last twice as long.  To keep everything at the ideal slightly warm operating temperature for best sound, the ZSTAGE is run 24/7 and has no switch.  It draws less power than a 15 watt light bulb and was specifically designed to stay on continuously.

There are a single pair of inputs and a single pair of outputs.  The output level can be adjusted with the front mounted gain control.  In cases where no preamp is used, this can be used as a volume control and drive most amps directly.

A font mounted switch allows you to adjust the operating points on the tube causing two different signatures; One is extra dynamic and full, the other is more laid back sounding. A valuable voicing tool to find the best compliment to your system, it also lets you hear any tube you put in it sound two different ways.


A very good description of how to use this and what it can do for you can be found in the owner's manual.

OWNERS MANUAL



TUBES

A final advantage to using a ZSTAGE is the simple fact that you can tube roll with your choice of   12AT7's or 12AU7's.  Each of these tubes have a different signature as does every brand of each tube so you gain tremendous control over how your system sounds by voicing it to your tastes.  Since the tube sticks out the front it can be easily changed at any time.  Expect about 5 years on the tube before replacement.  All tubes come with a 90 day warranty. The unit will ship with a 12AU7 because it's generally the best sounding of the two.


BIASING

The ZSTAGE is self biasing so you NEVER have to set or adjust the bias for the output tubes.  It is a maintenance free design.


QUALITY

Of course there are no circuit boards and no Chinese parts evident by the lifetime warranty.

Internally the ZSTAGE uses top grade resistors and poly film & foil capacitors on each channel.  The output level control is made by ALPHA, internal wiring by MOGAMI. Voltages are low for tube gear so the tube lasts for many years. 

The purist signal path consists of 1 resistor and 1 film & foil capacitor and a perfectly straight solid copper ground between the jacks and the tube.



inside view



SUPPORT

This amplifier is hand built in the USA by DECWARE / High Fidelity Engineering C0. It comes with a lifetime warranty to the original owner. If you purchase one second hand and ever have questions or technical problems we WILL be happy to check it out for you and service it if needed for a very reasonable rate.

We also have a support forum with many people who own this amplifier who's experiences you may benefit from.


REVIEWS

You may read reviews on our products here.

HISTORY of REVISIONS

None.  The ZSTAGE remains unchanged since it's debut in Aug 2010

SPECIFICATIONS

Weight   7 lbs. ea.
Dimensions   2.5" H x 6" W x 11.0" D
Circuit type   Single ended Class A Triode
Gain   Adjustable from 0 to 5 volts.
Input voltage   2 volts max
Output Impedance
<1000 ohms
Input Impedance
47 Kohms
Noise / Hum   Less   than 1.5 millivolts
Response   10 Hz ~ 70 kHz
Feedback   ZERO negative feedback used
Rectification   fast recovery diodes
Signal tube   12AU7 or 12AT7 
Transformers   Decware
Biasing   Self-Biasing
Resistors   precision WW/MF by DALE, VISHAY
Signal Cap   Polyurethane Film Auricaps
AC cord   Removable power cord
Consumption   13.5 watts at full power
Input jacks   RCA type 24K Gold / Teflon
Output jacks   RCA type 24K Gold / Teflon
Warranty   Lifetime to original owner


RELATED INFO

ZBOX - Tube buffer stage that has no gain.








Works to enhance any CD player or DAC
with a standard 2 volt output




Rear View




Model ZSTAGE
1280 high res image

$819.00 SUG. RETAIL

YOU PAY factory direct price
with 30 day money back guarantee
(less 10% restock fee)

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Hand made in the USA and sold direct to the customer with a lifetime warranty!
Available in 120 or 240 volts.





 







Rotary 6 position switch box
model RSB6

Use this to add up to 6 additional inputs!

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Hardwood equipment rack
model ZRACK

This hardwood rack features both fixed and adjustable shelves .  Shelves are de-coupled for resonance control

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Silver Reference Interconnects
model DSR-II

This  silver interconnects  are the epitome of well balanced, and recommended with all or our gear (or anyone else s)

more info

 

 





Silver Reference Power cord
model DHC-1

These  silver power cords  are the real deal and recommended with all or our gear (or anyone else s)

more info 


 

 





Factory tubes for all our amplifiers!

Find the original high quality tubs for your Decware amplifier here! Keep a spare set on hand.

more info 


 

 







 
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DECWARE / Therapy For Audiophiles