MCI JH-600
A broadcast-and-studio console that MCI's own advertising pitched on being quieter than the competition. The period press largely bought the claim.
Overview
The JH-600 is one of the harder MCI consoles to pin down, because what survives in the period record is mostly advertising and classified listings, not a clean spec sheet. What can be established is that it was a recording/remixing console sold under the MCI name during the Sony-owned era. MCI positioned it as its flagship studio desk, the one its engineers set out to build as "the world's finest recording/remixing console," promising more performance and more features than anything before it. That language is MCI's own, from a Recording-Engineer (August 1983, p.11) advertisement. Read it as marketing, not a measured verdict.
The interesting part of the JH-600 is how configurable it was. MCI's advertising materials describe a JH-600 console fitted with 36 inputs and routing to 24 busses, which is a serious tracking and remix desk by any standard. The same materials also reference a JH-618 broadcast configuration with 10 mic inputs and five stereo line inputs. That suggests the JH-600 platform could scale from a compact broadcast desk up to a full multitrack studio console. The "JH-600 Series" branding in period ads implies more than one variant existed, though the surviving sources don't fully document the model lineup.
One of the more concrete claims comes from an MCI advertisement in Studio Sound (December 1980, p.45), which pitched the JH-600 Series as "the console with differential electronics - at an affordable price." The "differential" language refers to the console's input electronics topology, and in the company's own marketing it set the JH-600 apart from earlier MCI desks. The same ad carried the tagline "quieter than you know who," a dig at a competitor MCI declined to name. Whether the JH-600 was actually quieter than a Neve or a Studer is not something the surviving period sources settle. Collectors who have worked on both tend to have strong opinions, but those opinions aren't documented here.
The JH-600 also shows up in the automation conversation. A Mastermix automation FAQ from the period lists it among the consoles the system could be fitted to, alongside desks from Amek, Cadac, Calrec, DDA, Harrison, Neotek, Neve, Soundcraft, Studer, and Trident. The JH-600 was common enough in professional rooms that a third-party automation vendor considered it worth supporting. The same FAQ notes that DC-grouping consoles using VCA faders, the category the JH-600 fell into, couldn't offer computer control of fader functions the way digital systems could. Grouping on those faders was hard-wired, not software-assigned. Anyone expecting modern automation behavior from a JH-600 will be disappointed.
By 1983, MCI was being marketed as a Sony property, and the JH-600 Series was the centerpiece of that pitch. A Recording-Engineer (April 1983, p.5) advertisement claimed that survey after international survey ranked MCI as "the undisputed number one choice of the world's leading studios," and that the JH-600 Series "beats out every other comparably priced console on the market." Note the qualifier "comparably priced." MCI wasn't claiming the JH-600 beat a Neve at any price. It was claiming it beat everything in its own bracket, which is the more defensible position.
What the JH-600 actually sounded like, how its mic preamps performed, what its EQ curves looked like, and how it held up over decades of session work are not questions the surviving sources answer with any rigor. The console shows up repeatedly in classified listings from the period. Blevins Audio Exchange in Nashville listed "MCI JH400, JH500 and JH600 consoles" as available stock in multiple Recording-Engineer issues. That points to a healthy secondhand market while the desk was still current.
What Survives, and What Doesn't
The record on the JH-600 is thin. No production years are confirmed in the available documentation. There is no original list price, no channel count for the base configuration, no dimensions, no weight, no documented maintenance issues, and no confirmed collector pricing. The console appears in period advertising, in classified listings, and in a third-party automation compatibility list, and that's essentially it. Anyone claiming to know the JH-600's full spec sheet is working from sources not represented here.
What can be said with confidence is that the JH-600 was positioned as MCI's top-tier studio console during the early 1980s, that it was available in multiple configurations including a broadcast variant, that it used differential input electronics, and that at least one major third-party automation system supported it. Collectors and studios working with JH-600s today are largely relying on institutional knowledge and service documentation that hasn't made it into the public record in any organized way.
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