Neurochrome Modulus 686 Monoblock Amplifiers. Apr 2024 I heard a pair of these at a local HiFi meeting and fell in love with them. Sound familiar? It should, it was when I heard them hooked up to a pair of Canton CT-1000 Speakers. There was definitely great synergy in this pairing, enough to make me want to own both items. Neurochrome is the Brand owned by designer Tom Christiansen, who is based in Canada. His products are available to the DIY community as a bag of parts, assembled modules, or for the less capable, as fully built products. I could have ordered modules, a case and built them myself, but a chap called Joe Henry in the UK advertises Neurochrome Amps (and other kits) he builds for you and to your specification. The pair I heard were built by Joe, construction was to a very high standard and at a very reasonable price. It made sense to order ready made Amps from Joe. The Modulus 686 is a class AB amplifier, each unit uses six LM3886es configured as a Bridge-Parallel power amplifier. The Canton Speakers are 4ohm and each Monoblock will deliver 360w into this load (240w into 8ohm). The following are pictures of my amps under construction. With this build, a group of four hefty capacitors are used in each power supply, totaling 188,000uF in each amp. Each toroidal transformer is 500VA. Speaker protection circuitry is included in this build, but no soft start module, its not needed. I never get any kind of noise when powering up/down. My units going through a final soak test. The Amps are a fully differential balanced design, with just an XLR input, a pair of binding posts and a mains input socket on each rear panel. The front is as a simple, with just an illuminated on/off push button switch. And here they are after collection, I need to make a pair of speaker stands now, so they can sit under each speaker.