When it comes to underappreciated pedals, it’s hard to top the humble EQ. Yet these superficially unexciting stomp pedals can enable reproduction of elusive recorded sounds, salvage an unruly fuzz or amp, enliven a dull-sounding rig, or radically transform it from tune to tune. Why EQ pedals aren’t a more regular pedalboard fixture is puzzling. But the API TranZformer GTR underscores the immense potential of using a good one—particularly when you throw a nice preamp in the mix.
Kind of Blue
If the GTR looks familiar, it’s because you might have run across one of its rack-mounted antecedents in a studio. Anyone who has ever worked with a 550-series rackmount EQ on a recording project will recognize the API’s signature cut/boost knobs, the peak/shelf switch (which on the GTR works with the 5kHz band), and the same basic 3-band structure as the 550 series. The TranZformer circuit is based on the vintage 553 Program Equalizer, and by using similar, familiar controls and functionality, the GTR achieves the same intuitive feel that makes the 550 easy to work with in a studio.
API TranZformer GTR Review by premierguitar
Detents in each tone knob make tuning by feel and ear fast and easy. And the boost input gain knob starts at true 0 dB of boost, so you can dial in an initial EQ profile free of preamp color, add gain, and adjust the EQ again to taste in a natural, incremental process. It’s a great layout for finding tones fast—and even committing them to muscle memory.
There are three toggles situated below the EQ and preamp gain knobs. The rightmost toggle activates a -20 dB pad, which is critical if you want to utilize the full range of the pedal’s gain knob. The middle toggle switches between shelf and peak EQ settings for the high-frequency range. The peak setting, which emphasizes a specific section of the EQ curve, sounds airier in most positions, but it’s instructive to switch between the two at a given EQ setting to hear how shelved and peaked 5kHz-range settings interact with various settings in the other two bands.
A little extra treble and midrange, and a dash of overdrive-mode distortion, gives a Fender amp a cool, unmistakably Vox-y edge.
Switching into overdrive mode gives the pedal’s preamp an extra push. In low gain settings, the differences between overdrive and boost modes aren’t always wildly different. But the distortion gets meaner with just a dollop of extra midrange, and adding gain reveals an organic, growling tonality that feels direct and dovetailed with amplifier tones.
Room to Wiggle
The GTR’s EQ and gain controls give you many means for matching your guitar and pedals to unfamiliar amps. Better still, it helps you surgically shave, carve, recast, and bolster tones from the amps and pedals you already know. I love the sound and feel of the Telecaster/Tremolux tandem I used for most of this test. And I was pretty impressed at how the API could make the black-panel Tremolux sound like a bigger, more excited version of itself without compromising the amp’s personality. A little extra treble and midrange, and a dash of overdrive-mode distortion, gives the Fender amp a cool, unmistakably Vox-y edge. At even more advanced mid, treble, and bass settings, the pedal coaxed tweed-leaning voices when I tweaked the amp tone just right. All these colors were easy to find quickly and intuitively. And in a studio situation, where you like to keep things moving at a steady clip, I would probably much rather try to fine-tune a drive sound using a simple amp and the API than switch between a half-dozen overdrives to find some just-right tone recipe. If your amp is in decent working order, the GTR is likely to unleash some bigger, fatter, meaner, or more vibrant alter ego.
I love the GTR’s simplicity. And the high-quality build and low noise are evidence that API didn’t cut corners. Still, for $280 some might expect a second footswitch for the boost/overdrive section. And though the analog purity of the GTR is also awesome, I’m sure a lot of players will hear the breadth of extra colors the GTR enables and crave presets. On the other hand, the GTR is effectively three pedals in one, which makes the price look a lot more palatable. Plus, considering the way the GTR makes you less inclined to chase a new amp, perhaps you can consider pennies saved in the cost as well. The TranZformer GTR may not totally succeed in making EQ sexy, but its streamlined design, utility, and capacity to give new life to tired tone recipes are creative gold.
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