Welcome to the home of RSL Plug-Ins - the most exciting upgrades ever developed for your classic Naim preamp. Over 90 satisfied customers around the world!
Recent comments:
"I have been running Kit's boards in my 72 for just under two weeks now - wow what a transformation! Really brought my System to life; in fact I didn't think such an upgrade was possible! Definitely the best money I've spent on Hifi so far by a long shot.."(31 January 2015).
"...boards are home now and I can only say, where have they been all my life? They are just jaw-dropping.... "(October 2015)
Not merely an upgrade, the RSL Plug-Ins will totally transform your preamp by replacing all the active circuitry to bring you the most dynamic and engaging sound you have ever heard from your system. Experience the thrill of re-discovering your music collection!
A breeze to install - they literally just "plug in" in a few moments.

**The latest version of our output boards, Z250V (shown above), has 3 selectable gain settings to allow you to best match your system's efficiency. See more in the description of the Z250V.**
What's so special about RSL plug-ins? By using many surface mount components we are able to put better circuitry on each board, such as regulated power supplies and film capacitors, while at the same time retaining fully discrete transistor amplification. Our plug-ins have evolved through dozens of iterations - every component has been carefully selected to enhance the sound quality to you, the listener. The result is that only our Plug-In sets can give your system all these benefits in a single stroke:
· More musical than the original - your RSL 12/32/32.5/72 preamp will outperform even a NAC52/Supercap, based on comparative listening tests.
· Transparency, air, and dimensionality - hear every instrument in it's own space.
· Amazing dynamics, detail, and bass clarity.
· Voice, piano, horns - you can feel their presence right in your listening room.
· MC & MM Phono plug-ins and even remote volume control (!) are also available. Add them now or later.
· Built to last a lifetime.
And, importantly, all our plug-ins include a 30-day, “no quibble” money-back guarantee and a one-year warranty on manufacturing defects. (Click here for warranty details). This is your best, no-risk way to achieve an up-to-date, superb sounding system!