Border Patrol Power Supply and MB Power Supply The Border Patrol Power Supply is a unique audio component that transforms the performance of valve amplifiers. Border Patrol Power Supply’s have been attached to valve amplifiers as opposite as the humble Audio Innovations Series 300 and the aspirational Audio Note Neiro. The effect each time has been revelatory, allowing the amplifiers to deliver a dynamic performance that had previously been unattainable. Audio Note CD players, Audio Note Digital to Analogue converters (including the DAC5) and  SJS Arcadia and Audio Note pre-amplifiers have also been converted. The effect on reviewers and users has been similarly profound, with glowing reviews, a Product Of The Year award from Hi-FI Plus magazine, and several eulogistic postings on the Internet. 'Now this isn’t a subtle change in performance, or a musically trivial one. It isn’t cosmetic or a question of taste. It cuts right to the heart of the amp’s function and creates better, more credible music.' Roy Gregory Hi-Fi+ Jan 02 EDITORS CHOICE  'In every instance the Border Patrol effect was nothing short of a transformation. Bass solidified, imaging became significantly more three-dimensional and substantial, and the power-supplied amp made the regular version sound, quite literally, a mess.' Jason Kennedy Hi-Fi Choice April 97 Hi-Fi+ 2001 PRODUCT OF THE YEAR awards issue. REVIEWS

The Border Patrol PSU valve rectified choke input filter high voltage supply replaces the existing high voltage supply in valve amplifiers and valve electronics. An ideal combination of regulation and freedom from electronic noise, it makes amplifiers sound simultaneously more relaxed and more dynamic and controlled. Almost all amplifiers will be substantially improved, including those that already use valve rectifiers and chokes in their power supplies (e.g. Audio Note Meishu, Quest series, Kit1/3 and Art Audio Diavolo models which use them in a capacitor input configuration).
With a Border Patrol PSU installed, amplifiers remain in control on complex musical passages and reveal interplay between musicians that was previously blurred and ill-defined. Bass will arrive (and leave) on time, with real strength, correct shape, and accurate timbre. Background 'hash' and noise will be reduced revealing previously hidden details and a layer of high frequency hash, grain and glare will be removed.
If you are unsure about the suitability for your amplifier, please e-mail bp@borderpatrol.net

Upgrade to MB PSU

If you are the owner of a Border Patrol PSU it can be upgraded to the high performance MB . If you thought the standard unit was good, wait until you hear the MB supply. Even if your amplifier theoretically does not need the extra current capability, the conversion will produce a substantial sonic improvement. Contact BorderPatrol for more information .