ANK Audiokits L4 EL34p & EL34i Amplifiers - IE Core Edition
EL34 Push-Pull Power & Integrated Amplifiers - 35W per channel Class AB1
ANK Audiokits are very proud to announce the new version L4 EL34p & EL34i amplifiers. First released in 2008 as a pure power amp we have made numerous enhancements based on customer feedback and our own experiences. The amplifier is now a stellar part of the growing ANK Audiokits product line and an example of the ultimate in high end DIY audio!
The new version amplifier can purchased as a pure power amp or as our new Integrated amp technology complete with tube pre-amp section, ELMA extension kit and three pairs of RCA inputs.
The amplifier sports an updated power supply section complete with new massive low inductance CHOKE and Mundorfs latest power capacitor technology.
The new Choke, ultra Quiet Mains T-190 and newly designed PCB make up the new EL34 Power Supply section that we are using in the 35W & 70W amplifiers!
A brand new ultra thick PCB has been designed to house the EL34 & ECF80 driver sections. Every detail has been taken into account to make for a very clean build - large chassis and signal ground traces expertly layed out assure a perfect sonic operation! Our new CMC black teflon valve bases are used for the EL34's such that they have an ultra snug fit into the board!
Here is the new EL34 PCB using the CMC black valve bases
Expertly designed with all the ideal grounding strategies for ultra quiet operation!
Click on the image to see a larger picture.
We designed a new 12au7 tube pre-amp buffer section to drive the EL34/ECF80 power amp - this board is installed on the inside front of the chassis.
This ultra quiet tube stage add the desired gain for an ideal integrated amplifier - it's so quiet as we have used some tricks to minimize any possible noise from this pre-amp section!!
Tube-roll away with your 12au7 collection to get different characteristics to your overall sound!
We have also added our ELMA selector extension kit with custom bracket similar to the L3 pre-amp - this assures very short RCA input wire lengths into the selector switch controlled from the front. From the selector, the audio signal uses AN-A shielded signal cable to travel to the ALPS PCB pot or which ever Potentiometer you want to install (the chassis fits all the standard types from various manufacturers including GoldPoint, DACT, ELMA, TKD, etc.) Alps is also offering a Remote control version of their 100K ALPS pot which easily fits into the amp!
The chassis is made of our usual thick 3mm aluminum powder coated black. Chassis fittings include AN gold brass knobs, AN speaker posts and gold plated RCA's.
Mullard introduced the EL34 late 1953 and has been used in many famous amplifiers throughout the years from manufacturers such as Marantz, Dynaco, Acrosound, Heath, H. H. Scott, Eico, etc.
A large version of this schematic is supplied with each kit
Click on an image below to zoom-in or cycle through the images using the arrow buttons below.
The new EL34 stereo CLASS AB1 amplifier from AudioNote Kits was designed by master craftsman Andy Grove of Audio Note UK – This amp is near & dear to Andy’s heart and he has used many years of amplifier design knowledge to come up with this awesome new EL34 tube amplifier for the DIY market! As one customer recently put it – it sounds ridiculous! (that means very good!)
I asked Andy to write me an article on how the design came about – what were some of the reasons you went with the Pentode wiring instead of the Ultra linear mode as used in the famous DYNA ST-70 – Its been about a year of R&D from the development of the output transformers, the overall circuit design– the prototype building, the tuning and optimizations of the circuits, the partitioning of the circuits into hardwired and PCB – the overall layout of the amplifier, the manual and all the parts sourcing – the end result is a DIY kit of the highest quality with amazing sound results! At 35W it is very flexible and running in CLASS AB1 it has many of the benefits of a single ended sound with the advantages of push pull!
Below is Andy’s article – Enjoy!
They are going great! What a wonderful amp! (L4 El34i) It has almost as much "air" and "presence in the room" as my KT88 single-ended amp, and almost as much punch as my favorite-solid-state-of-all Creek mosfet 5030se. What a great compromise.
Hi Brian, today the L4 EL34i sing!. Very sweet, charming and balanced. Not any hum and noise. I love it! Thank you very much!
This is the best thing I have got in my audio system and its impact on the sound and pleasure of listening to music (any kind of music) is just unbelievable!!!
My so far bass-shy Yamaha speakers got very vivid, lusty and full of energy now! I had no idea that they are able to produce such nice low freq. tones!"
Thanks Brian ! The L4 sounds very special. Like you said the virtues of SE with the drive of PP. I heard many EL-34 based amps but none like the L4. Congrats !..
The power supply looks robust, great and yes, no hum whatsoever. I also get a good read out from the TP's (21.5V for all the tubes).
sherif elkady (AudioNote Eqypt dealer)
- Instruments are drawn clearly, clearly separated with space around - sometimes too much space, but here I am really sure that this WILL change with burn-in, this looks like a typical effect. I checked that with Jethro Tulls "Songs from the Wood", "I am the whistler", if you know what I mean: all these bells, pipes, etc. etc. in that background of heavy guitars, drums etc.
- And really very nice sound colors!!!
- Enjoyable. ABSOLUTELY enjoyable. From the first minute. Fascinating!
I spent some time listening to the EL34 amp tonight. After changing one driver tube the amp had 50% less hum than any other amp I own (<1 mv AC). This is a big deal when driving 105 db efficient horns. The EL34 is liquid, authoritative, dead quiet and throws an amazing sound stage.
My wife was instantly impressed which isn't always the case but said that the sound was great and kept getting better the more we listened. Dark Side of the Moon has never sounded better!
Robert Hughes (C-core version)
Thank you very much Brian for having allowed me to hear that. Now I have only a single envy : to try all your kits and the next is the DAC !
"an amp that gives you a huge soundstage, transparent full bodied sound and totally kicks ass"
See Olof's extreme build by clicking on the pictures below: