Yamaha SPX2000
A 1U rack unit that carries the SPX lineage into 96 kHz territory — and does it without forgetting where it came from.
Overview
The SPX2000 arrived as the newest member of a line that had already been a fixture in studio racks for well over a decade. The unit is a 1U rackmount multi-effects processor, and it was the first SPX device to offer 96 kHz DSP with 32-bit internal processing and 24-bit, 128× oversampling A/D/A conversion. That conversion spec matters more than it sounds on paper: the analog-to-digital and digital-to-analog stages are where a lot of budget processors quietly fall apart, and the 128× oversampling here is the kind of engineering decision that shows up in how clean the reverbs decay.
The headline feature is the Rev-X reverb algorithm, which introduced new Room Size and Decay Envelope parameters. According to That's a meaningful endorsement from a publication that didn't hand out praise casually.
The front panel sticks closely to the classic SPX configuration, and that's deliberate. Owners of earlier SPX units will recognize the layout immediately: a concentric input-level knob for the two inputs, LED-ladder meters just to the right, and a two-character program-number display supplementing the main LCD. Mix (February 2004, p.110) described using the SPX2000 as "like visiting with an old reliable friend" — the familiar interface and all the common programs are there, just with more underneath.
The backlit LCD is one of the more thoughtful touches. Its background color changes to indicate what type of effect program is running — reverbs are cyan, delays are white, red is reserved for warning messages — and five backlight color variations can be assigned to user programs. Sound on Sound (July 2003, p.8) noted that the color coding makes effect-type recognition possible "even from a distance or in the dark." For a live rig or a dark studio, that's not a gimmick; it's a genuine usability improvement over squinting at a two-line display.
The rear panel is where the SPX2000 separates itself from its predecessors. It carries XLR and ¼-inch TRS analog inputs and outputs with a +4/-10 level switch, AES/EBU digital I/O on XLR connectors with a maximum sampling rate of 96 kHz, a BNC word-clock input, MIDI In and Out/Thru, a USB port for editor/librarian software, and a footswitch jack. The analog I/O level switch caused some head-scratching in period reviews: Yamaha references both levels to 0.775V (dBu), while most audio devices reference 1V (dBV) for a -10 dB nominal level, which means the SPX2000's -10 dBu output is actually -12.2 dBV — a noticeable but not critical level difference when interfacing with gear that uses the more common dBV reference. It's the kind of detail that only bites you when you're already troubleshooting a gain-staging problem.
Internally, the SPX2000 is a single processing engine. There are no chains of modules and no separate programs for left and right channels. Electronic Musician (2003) observed that Yamaha apparently chose to emphasize fidelity over fancy features — which is consistent with the SPX series' long-standing character as a bread-and-butter utility box rather than a flashy showpiece. The mono/stereo switch on the front panel, combined with the choice of one-in/two-out or two-in/two-out effect programs, yields any combination of mono or stereo processing, and the two inputs can even be mixed to mono using the front panel level controls. That flexibility is the sort of thing you don't appreciate until you're mid-session and need to route a mono vocal through a stereo reverb without repatching.
The effects programs are organized into three banks, selectable by a single button. The Preset bank holds 97 programs, of which 17 are the new Rev-X reverbs. The Classic bank contains 25 "best of SPX" programs, and the User bank stores up to 99 custom programs. The Classic bank programs are worth knowing about: each of them, and quite a few of the Preset programs, are the only programs using their respective algorithms, which means if you find a sound you like in the Classic bank, you'd better save it to a User slot before you go editing.
The editing controls are laid out with two sets of four large buttons for program selection and parameter editing, plus smaller Undo and Compare buttons and three buttons labeled Parameter, Fine Param, and Utility. The Parameter button gives access to the basic parameters; Fine Param (a somewhat misleading name, as Electronic Musician pointed out) provides additional parameters; and Utility handles configuration settings for MIDI, input-source selection, display color, and program naming. The buttons themselves are small but feel solid — a small detail that matters when you're punching through menus in a session.
One usability quirk worth flagging: the fast parameter scrolling is extremely fast, moving from one end of the range to the other before you know it. Electronic Musician (2003) found this vexing — you can zip back and forth wildly or give up and scroll slowly. It's a minor annoyance, but it's the kind of thing that becomes a daily friction point if you're the type who tweaks parameters constantly.
The combination MIDI Out/Thru jack on the rear panel is another compromise. Electronic Musician noted that combination Out/Thru jacks are inconvenient when you have several processors in a single rack and want to daisy-chain Thru to In while reserving Out for editing from the computer — though for most applications it's a tolerable setup. The grounding screw next to the IEC power jack, however, is a genuinely thoughtful touch: it acknowledges how often SPX-family devices end up in rooms with less-than-optimal AC wiring.
The SPX2000's dimensions are 1U by 14.7 inches deep, and it weighs 8.8 pounds. The frequency response is rated at 20 Hz–20 kHz (0 dB +1.0, -3.0) at 48 kHz sampling and 20 Hz–40 kHz (0 dB +1.0, -3.0) at 96 kHz. Dynamic range is 106 dB (A/D+D/A), and total harmonic distortion is 0.01% at 1 kHz at the 96 kHz sampling rate. Sampling rates supported are 44.1, 48, 88.2, and 96 kHz. Resolution is 24-bit.
The SPX2000 was priced at $1,249 when it launched. Electronic Musician (2003) placed it in a curious market position: multi-effects processors in the $200 to $500 range were plentiful, but truly excellent fidelity typically cost $1,500 or more, leaving the SPX2000 "curiously alone at its price point." The review suggested that could give the device a nice niche as the entry point into the world of upscale audio processing. That's an honest assessment of a product that wasn't the cheapest or the most exotic, but occupied a specific and useful slot.
Electronic Musician (2003) gave the SPX2000 ratings of 3.5 for features, 4.5 for ease of use, 4.0 for audio quality, and 4.0 for value. The pros list included the large number of algorithms, the very good Rev-X reverb, 24-bit/96 kHz operation, digital I/O, consistency with earlier SPX models, and many thoughtful touches. The cons were that programs vary in quality and the combination MIDI Out/Thru port. That's about as balanced a verdict as a rack processor is likely to get.
Mix (February 2004, p.110) framed the SPX2000 as the continuation of a legacy — the SPX90 had become a de facto standard, and Yamaha wisely chose to perpetuate it rather than abandon it. Successors such as the SPX90II, SPX900, SPX990, and SPX1000 added refinements and better audio quality as the technology improved, and the SPX2000 continues that trajectory. Electronic Musician put it memorably: "The Model T is now a latter-day Mustang." That's the review's line, not the manufacturer's — and it captures the SPX2000's position well. It's not a radical departure; it's the same familiar tool, refined and brought up to date.
For anyone considering one today, the SPX2000 represents a specific kind of value: a professional-grade multi-effects processor with 96 kHz capability, digital I/O, and a reverb algorithm that period reviewers rated highly, at a price that undercut the high-end competition. It's not the most exotic or flexible unit ever made, and its programs vary in quality, but it does a great many things with varying degrees of success — which is exactly what the SPX line has always been about. The USB port for editor/librarian software adds a layer of modern convenience, and the unit can even be used as a 96 kHz A/D converter if you need one. That's a lot of utility in a single rack space.
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