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Welcome to Decware


Zen Triode Integrated Amplifier

5~6 watts of SET bliss

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This Cathode Biased Single-Ended Triode Amplifier

Let's you explore the sonic joys hidden in each of these popular output tubes!

This is our most popular SET amp because it has more power than 2 watts and it has enough room for cool options like 4 pair of inputs, a headphone jack and harmonically interlocked outputs for active subs or bi-amping.  

In it's 22nd year of production, this Single Ended Triode amplifier is in over 54 countries making audiophiles very happy because it's not fussy about speaker loads or tubes, has the famous Decware sound and comes with a lifetime warranty.


What sets this amplifier apart?

  • Quality.

  • The Sound - it's what we all chase.

  • Bass performance, Midrange Magic, Sound Stage, Liquidity, Honesty.

  • No circuit boards or solid state parts.

  • A signal path featuring 2 resistors and 1 capacitor.

  • Decware's highly interleaved Ultra Fidelity Output transformers. 

  • Class A SET operation that can drive loads below 4 ohms. 

  • 7 revisions since the year 2000.

  • Feedback from many 1000's of customers creates a highly evolved product.

  • Exotic internals and upgraded hardware.

  • Point-to-point wiring with no circuit boards and zero negative feedback.

  • Designed by audio guru Steve Deckert.

  • Parts and Labor from the USA with a Lifetime Warranty.


This is a pure class A single-ended-triode amplifier with around 6 high-current watts per channel and the ability to drive speakers between 4 and 16 ohms.  It features a volume control and up to four pair of input jacks making preamps completely optional. Also it can be series bridged into mono for around 12 watts. Because of our floating output stage design there is no smear like you get from paralleling both channels.

Based on one triode-wired EL34 output tube per channel driven by a direct-coupled 6N1P-EV for the input on each channel and using a single 5U4 or 274B tube rectifier this jewel is the definition of simplicity.


The amplifier is cathode biased for best sound and to ensure that the tube bias is always happy... not to be confused with 'auto-bias' which attempts to maintain the bias using solid state circuits.   All this means is that when you want try different output tubes there is nothing to adjust.  Just plug and play.  Life is simple with this amp.

Decware amplifiers, including this little jewel are all point-to-point wired without circuit boards and are laid out in such a way that the part leads themselves create the circuit. This creates minimal wire and minimal solder nodes.  Also there are no solid state parts in this amplifier. Not even an LED to potentially poison the signature.  The power supply is a brute force design meaning it is sized 300% larger than required so that even at full power output there is zero sag. With no need to regulate there is no possibility of artifacts from the regulation.

In summary, if I were building and amplifier for myself... this is how I would do it when there are no concerns about the profitability of mass production or how much power it might make and you just want the very best possible sound.  The happy side effect of this approach is that the amp lasts forever, which is why we can offer a lifetime warranty.


Steve Deckert / DECWARE


You may choose from several kinds of wood bases for your amplifier.


NOTE:  We also have new custom hardwood bases!


These wood bases are selected in the shopping cart.  From top to bottom is solid maple, solid cherry, solid walnut with black paint, solid walnut, black figured.


Walnut (second from the bottom) is the standard base with no additional cost.


Other woods carry a small upcharge.  Custom woods and finishes cost more.



Knob types: ebony, gold, black chicken head, cream chicken head, rosewood

Anniversary Mods

Anniversary mods were developed to take this amplifier a step closer to our top model SE84UFO25's resolution.  These mods enhance speed / resolution to its maximum musical potential.  There are both level 1 and level 2 anniversary mods.  The difference is the type of capacitors used in the mods.  Level 1 uses poly film caps while level 2 uses copper foil caps to match the copper foil caps in the signal path. 


The wood type, knobs and other options can all be configured from within the shopping cart when you check out.


Weight 18 lbs. ea.

Dimensions 8.0" H x 16.5" W x 12.0" D

Circuit type Single ended Class A Triode

Power output 5.8 watts RMS into 8 ohms

Input voltage 1.2 volts for full output

Noise / Hum - 80 dB / -58 dB  

Response 20 Hz ~ 80kHz 

Feedback ZERO negative feedback used

Rectification 5U4G or 5AR4  / tube rectification

Output tubes EL34 or 6L6G or KT77 or KT88 or 6550 or 807 with adapter

Signal tube 6N1P, 6N23P, 6H1N, 6922, 6Dj8,7DJ8  or  6N2P

Transformers Decware

Biasing Self-Biasing 

Resistors precision WW/MF by DALE, VISHAY

Signal Cap Cryo-Treated Beeswax foil caps

AC cord Removable power cord

Consumption 85 watts at full power

Input jacks RCA type 24K Gold / Teflon

Output jacks 5-way binding posts accept 8 gauge wire

Speaker dB/1w 89 dB minimum / 96 dB or higher is ideal

Warranty Lifetime to original owner


Since we don't have dealer's and we sell our amplifiers directly to the customer, our customers have a direct line to us.  As a result, Decware support is legendary for over 20 years.

Support is not only a phone call or email away at any time, but when you purchase this amplifier you join a huge family of customers who also own one and enjoy supporting each other on the:



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Manual is in a .pdf format


5~6 WATTS x 2  or around 12 WATTS x 1

Made by hand in the USA and sold wholesale to the public with a 
L i f e t i m e   W a r r a n t y  !

Factory Wholesale Price $1795

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Amps are hand-built to order.  There are presently lots of orders on our real time build sheet.   A 10% deposit secures your place on the list with today's date and time stamp.  Balance is due when it's ready to ship. You will be sent a final invoice with the total price including actual shipping costs by our office during your wait.   




Model SE34I

Manufactured from 2000 to 2004 


Featured dual mono and four output tubes, each tube had its own transformer and binding posts to facilitate bi-amping your speakers with a single amplifier.  Additionally it could have a preamp stage installed.  Outputs could be series or parallel wired or bi-wired.


Model SE34I.2

Manufactured from 2004 to 2009. 

The 4 output tubes were traded for 2 output tubes and 2 rectifiers making the amp simpler to operate and giving it better transparency.  The power stayed the same.


Model SE34I.2+

Manufactured from 2009 to 2012.

The output tube section was upgraded with the Hazen Grid Mod pushing the performance and fidelity of the EL34 a bit higher.  And the amp is now also compatible with KT77, KT88 and 6550 output tubes.

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Model SE34I.3

Manufactured from 2012 to 2014.

This is where things obviously changed with the addition of meters and a cleaner layout both internally and externally.  Circuit remains the same, power supply is simplified reducing heat and cost of operation.


Model SE34I.4

Manufactured from 2014 to 2015.

Changed from aluminum to powder coated steel adding considerable mass to the chassis.  These are also now made standard with Cryo-Treated Beeswax Capacitors like all of the latest Decware amplifiers with black top plates.


Model SE34I.5

Manufactured from 2015 to 2022

UFO output transformers become standard and coupling caps are upgraded to Copper Foil Myflex.  Anniversary mods also become available.  Shown with 807 tubes using adapters.


Model SE34I.6

Manufactured from 2022 to now.

A new power supply for even lower noise with speakers over 100dB and compatibility with 274B rectifier tubes thanks to a newly designed 4uf choke-filtered power supply.  









Zen Triode Integrated Amplifier

5~6 watts of SET bliss

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