MapSpinner Page

All DECWARE products are made in the USA



Read Steve's
on these amplifiers in the articles section

Read the White Papers to find out how they work!

for these



of these
fine amplifiers

by appointment at


 join our forums and
ask who's in your area with Decware gear. 

actually do anything worthwhile?



An article that explains where we're coming from.



Zen Triode Integrated

  6 watts x 2 or 12 watts x 1

Hand made in the USA and sold Factory Direct with a
L i f e t i m e   W a r r a n t y  !



"Exploiting the magic of the beloved EL34 / 6CA7 output tube as only Decware can!"

If you love S.E.T. amplifiers, then you know why you're here...  If you're new to the Single-Ended Triode (S.E.T.) concept, here's your chance to get it right the first time !

In it's 12th year of production,
this 6 watt per channel S.E.T. amplifier's popularity has withstood the test of time. It's been upgraded three times over the years with subtle improvements, but this time the change is big! 

For the first time since it's release this wonderful amp is bridgeable into mono using the Decware Series Floating Output Bridge that eliminates the typical smear you get when you combine the channels of stereo amplifiers.

for the first time in this amp, you'll have meters that turn your amplifier into a real time tube tester for each output tube!  This lets you see at a glance if your tubes match, and how strong they are.

Own one of the best sounding production SET amplifiers in the world without the expense or biasing hassles common to so many competitors.  Tubes last a long time here.

Similar to our 2 watt amplifier that started Decware, this is an execution with the purist in mind.  It has only 1 capacitor in the signal path.  There is no feedback of any kind so it's a heavy dose of the completely 3D imaging Decware amplifiers are known for.  Of course it goes against the grain with great bass and a very extended top end, wonderful neutrality and more density than you would think possible from only 6 watts!

It's an easy amplifier to own because there is no maintenance and no bias pots to adjust.  Tubes last a long time.  There are no vent holes to let dirt and dust contaminate the inside.  There are no circuit boards to crack or burn up, and we've got you back with a lifetime warranty.

You will simply turn it on and enjoy the music, every time. 

* Taking advantage of the unique qualities of the EL34 this amp comes standard with the Hazen Grid Mod.  As a result, the transparency and musicality it has sets a new benchmark for EL34 that exceeds directly heated triode amplifiers at twice the price.

More on the Hazen Grid Technology (also known as the Christmas Comes Early mod) can be
found here and in our forums, here.

This amplifier features an interchangeable wood base design.  That means you can choose how you want it to look or even change it's look down the road by changing the wood base it sets in! 

You can select from the Black Figured Base (shown at the top of this web page) OR the Contemporary Walnut Base (shown here).  Different woods can be selected from the shopping cart.  The Black Figured base is only available in Black.

There are also some knob choices.  From left to right are Ebony, Gold, Black, Cream, Walnut (matches the contemporary walnut base).  You can configure your amp with any of these knobs from within the shopping cart.


  (Screen shot from the shopping cart.)



Ship the amplifier without tubes and waive the 30 day trial. Saves $150.00 This option is for people on a tight budget. We highly recommend getting the amp with our tubes because we know it will sound right, and the tubes have been testing in the amplifier.


This options gives you both the standard 6N1P's and these higher gain 6N2P's so you'll have both kinds to try. It's like having two completely different sounding amplifiers


You can configure your amplifier with one, two, or four pair of inputs for up to 4 sources. We also offer Silver RCA jacks as an upgrade over the stock gold plated jacks.


If your configuration has a volume control, then you have the option of adding variable line level outputs. These outputs can be used to driver a second amp (bi-amping) or a subwoofer(s). The signal coming from these outputs will match the signature of the amplifier. That means you could run this amp on mids and highs and a "slave" amp on the bass that takes on the signature of the tube amp for a more coherent sound.

Signal Capacitors

The amplifier comes standard with Cryo-Treated High Temperature Beeswax Capacitors with silver leads from Jupiter. Alternately we have a type II Beeswax capacitor that uses flat stacked copper foil and beeswax that we feel pushes the amplifier's fidelity to a justifiably higher place. And finally, you can also elect to have the amplifier made with Teflon VCAP's which have been a popular upgrade in Decware amplifiers since the beginning.

Volume Control

We offer a 20 step 1% precision metal film attenuator with gold contacts as an optional replacement for the stock volume controls. These are not needed to hear how good the amp sounds... they're really just icing on the cake for that last 5% improvement. 



The SE34I.5 is a very stable amplifier capable of driving all high efficiency loudspeakers because of it's transformer-coupled output stage.  This creates a hand-shake between the amplifier and the loudspeaker and protects the speaker from DC voltages should a tube ever fail.  Of course most tube amplifiers use output transformers, which tend to be the most expensive single components in the amp.  This is where most amplifiers fall short by trying to impress you with big heavy transformers of average or low quality.  The more power the amp has, the more likely it is to use moderate quality transformers - at best. 

Decware transformers were designed and are built specifically and only for THIS amplifier.  They use the highest quality grain-oriented silicon steel laminated cores with exhaustive interleaving to produce the most phase coherent wide bandwidth sound possible.  Our transformers have always been proprietary and are a
big part of the secret behind the Decware sound.  As of August 2015 Decware took their already great output transformers to the next level developing what is known as their UFO output transformers which are now standard in the SE34I.5.


This amplifier comes standard with our World Voltage Compatible Transformer. Your amp will be automatically wired for the correct voltage for your country and be supplied with the correct removable power cord.


The stock configuration is a pair of 6N1P's driving a pair of EL34 output tubes.  You can use 6N2P's, 6DJ8's, 7DJ8's or 6922's in place of the 6N1P's.  Output tubes can also be "rolled" with KT77's, 6550's and KT88's or even 6L6's.   Output tube life is whatever the tube is rated for.  This amp does not drive tubes hard so you can expect a long healthy tube life.  Because this amp has the Hazen Grid Mod that activates only when EL34's are used, we ship the amp with the top grade EL34/6CA7 that have been fully tested IN the amplifier.  All tubes come with a 90 day warranty.


The amplifier is self biasing so you NEVER have to set or adjust the bias for the output tubes.  If you've ever owned an amplifier that you had to bias all the time you'll completely appreciate this design.  Most amps are not self-biasing because it reduces the potential power output that you could otherwise get out of the tubes.  We're not overly concerned about getting the max possible power, only the max possible fidelity.  The less efficient self-biasing approach usually sounds better and removes the headache of biasing tubes.


We have successfully driven hundreds of different loudspeakers ranging in efficiency from 90 to 100dB 1w/1m. On 90dB speakers it works nicely in smaller rooms or for late night out of body experiences. 94 to 96 dB speakers are almost ideal in that they let you play beyond a normal listening level and preserve the dynamic headroom. When these amplifiers were first designed in 1997 there were a minimal number of "high efficiency" speakers to choose from. Today that is no longer the case - they are everywhere. We also offer several different types of loudspeakers that will work with this amp.

If you own speakers that you love and are afraid this may not drive them understand two things:
A) Most people report that it drove their speakers louder than they were expecting and B) a good tube preamp can really turn this amp on giving you more volume before clipping.


This amplifier is so transparent that differences between cables will now become big differences. If you don't have good interconnects or speaker cables or just you're just not sure how good yours are... we offer reference quality cables that will let you hear the amplifier's full potential. It is important to us that you hear what your new amp is capable of so we provide the same cables Steve Deckert, the designer, uses in his own personal system.


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. 


You may read reviews on this amp going back 12 years.

Model SE34I SE34-I / Manufactured from 2000 to 2004

The original Integrated featured 4 output tubes, each with their own transformer making it ideal for bi-amping, but a little complicated for some people's taste.  

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+

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 beyond what any of us thought possible.  And the amp is now also compatible with KT77, KT88 and 6550 output tubes. 

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.

SE34I.4 / Manufactured from 2014 to 2015.

The top plate was changed from white painted aluminum to black 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.

/ Manufactured from 2015 to now.

UFO output transformers become standard.

This Single-ended zero feedback amplifier requires no adjustments or maintenance other than changing tubes every couple years. It is a self biasing design using the EL34 and compatible output tubes wired in triode.

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   2.5 volts for full output
Noise / Hum   Less  than 1.5 millivolts
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 adaptor
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 with silver leads
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


SE34I.5 owner's manual


Hand made in the USA and sold Factory Direct with a
L i f e t i m e   W a r r a n t y  !