Engineering ObjectiveTo build a full range, rugged, mini-reference monitor to replace the older, aging, 5C Sound Cubes that are still in use worldwide, while offering an improved, more linear frequency response. A full year was spent studying all versions & revisions of the famous little 5C Sound Cubes. Research revealed that there were several driver versions released over the years with widely varying frequency response characteristics. We chose the smoothest, most linear, full-range version of those 5C models to use as our testing benchmark. Next we analyzed their response characteristics in an anechoic chamber and proceeded to implement design upgrades. Realizing the importance of replacing a respected "industry-standard reference monitor" we began by replicating its basic size, function, and sonic character. We wanted to take it up a notch though... First, we addressed the Cabinet Design... The original 5C Sound Cubes were made of ½” particleboard covered with a glue-on wood grain contact paper. We chose to use thicker, denser MDF board because of its high rigidity and inherent low-resonance characteristics. We started with a 165mm (6 1/2") sealed cube design with radiused edges. We then chose an elegant Polyurethane high gloss “RETRO-CREAM” finish. The originals had either screws or on later models plastic binding posts mounted on a recessed plastic cup. We upgraded to high-end nickel plated, machined solid metal binding posts (Dual banana spacing) mounted on a black anodized ,milled and silk-screened aluminum terminal plate. Next we added a 7mm thick neoprene pad embedded into the base of the cabinet to serve as a skid-resistant acoustic isolator. Additionally, for creative mounting situations, we recessed an industry standard 5/8”-27 mic stand mount into the base. Second, We addressed the driver design... The originals were a basic 5” stamped frame design. We designed a proprietary 5.25” die cast aluminum frame driver/cone assembly to exceed the performance of the originals. The mounting bezel is then polished for an elegant appearance. The paper cone, chosen for its musical character, is custom designed & crafted using the finest New Zealand pulp with mica fibers added for lighter weight & rigidity. The cloth surround is made in Japan to exacting uniform thickness tolerances. The Top Plate and T-Yoke of driver are made of Sumitomo 1008 low carbon steel enabling the highest modeled flux density in the gap. The magnets are Y- 40 GRADE (MIL-SPEC) yielding a 43oz. High Power-low distortion motor structure. Specifications System Type: Dynamic Shielded Full-Range Pair Frequency Response: 90Hz - 17,000Hz (useful musical range) Impendance: Nominal 8 ohms SPL / Sensitivity: 93dB @ 1w / 1 meter Recommended Power: From 10-200 watts Driver: 5.25" cast aluminum frame Cabinet: sealed / 18mm MDF / Dacron acoustical stuffing Inputs: 3-way CE rated plastic encased metal binding posts (accepts up to 12-gauge wire, spade lugs, dual banana plugs) Weight: 7.13lbs (per monitor) Dimensions: 6.5" x 6.5" x 6.5"
