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Page 7
1.2 Evolution of the L4 EL34i Integrated Amplifier
AudioNoteKits was formed back in 2004 when the AudioNote DIY business was separated into a
business unit focused on the kit market. The single ended 300B Kit1 was the amplifier that
started the business and made it popular – we followed with pre-amplifiers, DACs and Phono
stages, as well as more single ended amplifiers.
Many customers/audiophiles were asking about higher power amps but they also wanted
ultra high quality sound. The EL34 Power Amplifier L4 was born in 2008 and we showed it at
the Rocky Mountain Audio Fest that year – Andy Groves' pentode design blew everyone away
with its presentation, warmth and overall sonics! We sold quite a few of them but continued
making enhancements along the way. We tested a front end 12AU7 tube stage as a pre-
amplifier in the unit and were blown away by the results! Today, we have re-architected the
major PCB and enhanced the power supply. The amplifier runs in class AB1 mode providing
about 35W of pure EL34 power! The new L4 EL34i Integrated Amplifier is born!
The amplifier has the detail of a single ended amplifier and the slam of push pull – ideal for all
sorts of music, especially guitar dominated rock! It's also gorgeous on female vocals and really
brings drums to life – ideal on digital as well, as it has a warm presentation but also really
kicks on those 70’s rock albums!
The build of the amplifier is our best yet – we have an excellent mechanical and electrical side
to the build – large high quality transformers make the amp weigh a hefty 30 lbs! It’s a
beautiful presentation so the WAF is high! No one will ever believe it is a kit!
Have fun with your amplifier – a throwback to the glory days of HI-FI in the early 60’s – truly a
remarkable beast and something you can be very proud of!
