Graham Slee ™, HiFi System Components ™ and DAK ™ are brand names of Cadman Enterprises Limited
1998: Graham Slee Projects established, making "beer money" phono stages to satisfy the need for phono stages in the late '90s vinyl renaissance.
2001: The first Solo headphone amplifier introduced.
2004: Stereophile's Michael Fremer announces "the miraculous Era Gold V" phono stage causing a surge of interest in the products of Graham Slee Projects.
2005: PSU1 power supply receives IEC safety certification.
2005: Graham Slee Projects becomes incorporated with John Cadman joining the board.
2006: All products become compatible with RoHS legislation.
2007: The "Green Solo" heralds our success in using switched-mode power supplies in high fidelity applications.
2007: Ex Carlsbro QC engineer, Leo Kirkbride joins the team.
2008: Owner's Club Forum established.
2009/2010/2011: What HiFi award for Novo headphone amplifier three years on the run.
2011: International loaner program introduced - still unique in the world of HiFi.
2012: Proprius monoblock power amplifiers introduced - instant success.
2013: First venture into digital audio - the palm sized Bitzie USB DAC/HPA/"sound-card"/digital preamp introduced.
2014: Majestic DAC/digital preamp introduced.
2014: "Hearing is Believing" roadshows begin with the mystery phono stage - the forerunner to the Accession MM and MC phono stages - heard for the first time.
2014: The first phono preamplifier patent of the 21st century registered in the UK and US.
2015: Graham Slee Projects becomes HiFi System Components Ltd
2015: Accession MM (patented) phono stage launched
2018: Accession MC (patented) phono stage makes its debut.
2022: Graham Slee retired Dec 31st.
2023: HiFi System Components products continue with Cadman Enterprises Limited. New/improved products on the horizon!
Our products are designed to give you the best listening pleasure available. Better than all the rest at, and beyond their price points. This is our mission.
Only you can judge for yourself if we have achieved our goal: it is not to give you a specification to boast about, or a fashion statement to show your friends. It is to let you experience the ultimate in pure music reproduction - music reproduced in all its glory - music as those who record it hear it.
In doing so we do not follow trends. We think you want something different - something better - more involvement in your music.
It is not achieved by using a particular component or set of components, as many have been convinced to believe. This is not how it is done. But it can be very hard to undo the industry's brainwashing techniques.
But when your music is being reproduced in such a way that it is all immersing, that you forget about the equipment and stop caring about its visual appearance. When you listen to entire albums rather than cherry picking your favourite tracks. When it's so compulsive you forget about time and stay up late for that one last album. That's when you know everything is right.
But how many can say that? Is your mind questioning if there is better? Then it's time to act.
Do you really know how to test for the best? It is quite simple, but it depends on you being given the time you need with the product.
You need two weeks and you should have it switched on the full two weeks, even when you're doing something else and it's not playing.
Instead of choosing your "special effects records" you should just play your favourite music, and as much of it as you can during your audition period.
You must not do any comparisons at all for the entire period.
You must then send back the product (or products) you have been auditioning. Get them right out of your life!
Then continue to listen to your favourite music using your existing equipment. You will instinctively know what to do, or not do.
It's that simple!
Go to this page to see if there is a loaner program near your location.
All our products are assembled right here in Britain from parts sourced from British manufacturers and British component distributors.
HiFi System Components are definitely worth your consideration when choosing new high fidelity equipment to improve your listening pleasure - Phono Preamps, Power Amps, DACs.
Talk about Graham Slee and you think of small phono and headphone amplifiers of excellent audio quality... But, and many of you will know my BBC background, I remember spending many a lonely night working in Bush House sitting in front of one of the mixing desks he made whilst working as senior engineer at Audionics. In those days the BBC ushered quality and precision. Graham Slee has continued that zest for making the best since then, with his own projects under the label GSPAudio (Now HiFi System Components Ltd).
Janine Elliot (audio reviewer)
There's a real English gentleman I'd like you all to meet. Assisted by two talented engineers that build the products... he's gathered a following all over the world without much fuss or a big advertising budget. I've been a fan of Graham Slee for at least seven years and I should tell you why. In my experience, his products are absolutely reliable, very well priced and upgradeable, but more than this, they sound wonderful, fully competitive with much more expensive units. In 2004 I bought a Graham Slee Solo headphone amp and a Graham Slee Era Gold V phono-preamp and they've been my references ever since..
Phil Gold (audio reviewer)
Established in 1998 as Graham Slee Projects. Graham Slee's electronics career began back in 1974. First he worked in AV, then (1982) printed circuit design, electronics manufacturing, high-fidelity research and development, and broadcast audio design where he became a senior engineer with commercial radio broadcaster and BBC studio contractor, YRN PLC (Audionics division of Radio Hallam).
Among his earliest audio interests was DJing in his spare time at the peak of disco in the mid '70s. It started his interest in developing his own mixers and amplifiers. This experience was built on throughout his electronics career making him a talented designer of high performance high fidelity equipment.
John Cadman now looks after the HiFi System Components brand having joined Graham Slee Projects in 2004. He is a talented production engineer who also has a broadcast audio background working on BBC and commercial broadcast projects again with with YRN PLC.
He is also a bass guitarist with a strong interest in musical instrument electronics having built numerous amplifiers and signal processing units.
Leon (Leo) Kirkbride joined us in 2007 after working as quality control engineer at musical instrument and amplifier manufacturer Carlsbro Sound. His audio electronics knowledge and experience plus manufacturing capabilities further ensure our products are manufactured to the exacting standards we are renowned for.
He also is a "golden eared" prolific audio electronics hobbyist with a keen interest in digital and computer audio.
The line of HiFi System Components branded products are now solely manufactured by Cadman Enterprises Limited.