The feel, sensitivity, and low noise floor of a studio comp in a sturdy and intuitive stomp.

Intuitive. Ultra quiet. Loads of useful extra output. Great range in controls.

Some effects may seem too subtle for comp’ newbies.

API TranZformer CMP apiaudio.com

API’s TranZformer CMP is a powerful, if sometimes subtle, tone-shaping machine. It’s also much more intuitive to use than a pedal with four knobs and three mini toggles might seem. And just like the studio compressors it’s derived from, the CMP is incredibly satisfying to use once you get in a flow and unlock its secrets.

Any player confounded or intimidated by the concept of compression and how to use it constructively would be well served by experimenting with the CMP. The effect of a nudge to a given control can often seem minor. But each knob has exceptional range and great sensitivity, so you can take a painterly approach to fine-tuning a sound: A dot of extra sustain here, a bit more output gain there, and your flat-sounding Strat becomes a whole lot richer and full of body and color. The available output is no joke either. Depending upon your amp and pickups, you can use the CMP to readily dish loads of high-headroom clean boost or make your amplifier growl with smooth intensity. Perhaps best of all, the CMP is quieter than a mouse. And if you’ve worked with lesser pedal compressors that make you pay for extra sustain and punch with an earful of hiss, you’ll be thrilled at what the CMP can achieve.

At 280 bucks, it’s not cheap for a stompbox. But the quality of the CMP, the care and execution that went into its fine control set, and its capacity to transform tones in subdued or dramatic fashion make that sum look like a relative deal.

A modeling amp in vintage disguise.

Pros: Great balance between digital power and simplicity. Lightweight and super affordable. Nice app for editing.

Cons: Footswitch not included. Some functions are not intuitive and require a look at the manual. No digital readout.

Line 6’s Catalyst series is the latest in a generation of amplifiers bridging the gap between digital modeling’s enormous possibilities and many players’ desires for old-school simplicity. These amps offer detailed, convincing amp models—but not too many of them—in a compact, vintage-style design that makes avoidance of option fatigue a priority. The very accessible prices also make the series a direct competitor to Boss’ ultra-successful Katana amps. The Catalyst is offered in three models: Catalyst 60 and Catalyst 100 (both of which have one 12" speaker), and the Catalyst 200, which has two 12" speakers. For this review I tested the Catalyst 100, which sells for a very modest $399.

The Catalyst has plenty of bells and whistles. On the surface, though, it looks a lot like a simple, conventional 2-channel amp. There are knobs for boost, gain, bass, mid, treble, presence, channel volume, effect, reverb, and master volume. There’s also a knob that lets you choose from six original amp models: clean, boutique, chime, crunch, dynamic, and hi gain. Mini buttons let you save and choose between two channel presets or engage manual mode, where what you see is what you get. Other mini buttons allow you to engage boost, tap tempo, and select effects and a tuner. On the back panel is an output power knob that lets you choose from mute, ½ watt, 50 watts, and 100 watts. There’s also a USB jack, a DI out, and an effects loop.

There’s not enough space in this review to cover all the amp models in depth. And I suspect that for many players even just a few used through the full range of their clean and dirty variations will be everything they ever need. Still, the Catalyst’s abilities and potential—especially relative to its price—will excite any potential user.

I started my own experiments with the boutique voicing at the ½-watt output setting. Predictably, there’s not a lot of output in this mode, though it’s a lot of fun as a practice amp. At the 50-watt output setting, though, I could hear and feel the amp in a more complete way. There was headroom to spare and it’s impressively dynamic and responsive to picking nuance. And it was surprisingly easy to get SRV-style bite out of otherwise clean, blues-tinged phrases—again, very impressive. The useful boost knob lets you dial in extra kick, and, thoughtfully, each amp model has a specifically tailored boost voicing. In boutique mode higher boost settings added a lot more gain to the amp model’s cleanish sound, and the saturation sounded and felt organic.

The chime model, loosely inspired by a Vox amp, is warmer and thicker than the boutique model in cleaner settings. But when I engaged the boost (with the knob at noon) and set the gain knob around 11 o’clock, the amp positively screamed—generating an aggressive and at times piercing sound that would reward a player with a commanding approach like Eric Gales or a 1960s-influenced guitarist who loves the potency of single-note lines.

The high-gain model, meanwhile, is a fire-breathing beast. With the gain at 11 o’clock, there is plenty of bottom end, and the sensation of the amp moving air becomes more apparent. Engaging the boost softened the attack slightly, which made soloing more liquid. But there wasn’t much of a difference through the range of the boost knob from noon to max. The amp model is pretty saturated to begin with.

Using the clean model, I ran my Yamaha UD Stomp delay through the effects loop. The results were dimensional and often sublime. The power-amp-in feature lets you plug in a pedalboard and play it directly into the Catalyst 100’s power amp. I used another setup, with a Mesa/Boogie V-Twin preamp pedal, directly through the Catalyst’s power amp and it sounded phenomenal. And even though the preamp is bypassed in this mode, the boost function is still active. Set at 10 o’clock, it added a nice final touch to the Mesa/Boogie preamp’s clean channel, making it sound discernibly richer. In my humble opinion, just the power amp and speaker cabinet alone are worth the $399 price.

Though Line 6’s acclaimed HX technology is embedded in the Catalyst, the company did a good job of keeping options easy to manage and navigate. There isn’t an endless buffet of effects, as you might expect. There’s a standalone reverb, and apart from that you can only use one additional effect simultaneously, unless you bring your pedalboard to the party.

In total there are 18 effects, grouped into three categories: delay, modulation, and pitch/filter—each with a corresponding LED in green, blue, or purple, respectively. If you’ve used Line 6 products before, many of these excellent effects (and the color coding) will be familiar. There’s the fabulous dynamic “ducking” delay, some modulation models based on iconic pedals like the MXR Phase 90 and others, and some classic Line 6 pitch/filter effects like growler synth and synth strings. If you do want to use more effects simultaneously, the effects loop is an excellent way to patch in external effects.

The USB hookup, by the way, enables connection to a computer so you can use Line 6’s editing software, which allows you to dive deep into tone editing or just fine tune a few things. I imagine that, in reality, most users will just figure out how to get a couple of core sounds directly from the amp, save them, and just go with that. But it’s always great to have options, and if you’re someone that actually maximizes the capabilities of modelers and editors, you’ll have a field day with the app.

For any guitarist looking for an all-in-one, plug-and-play setup for practice sessions, live shows, and recording (you can record directly using both USB and the built-in DI with cab simulation), the Catalyst, at $399, is pretty tough to beat. It’s got more features than many players will need, but what will count for most of the target audience is how much you can accomplish without diving too deep. And though the price might suggest otherwise, Catalyst isn’t just for beginners or intermediate players. Any professional guitarist that’s tired of dealing with tube related maintenance and expenses will be happy with many of the sounds here.

A recreation of the company's very first pedal in its most compact form ever.

Mr. Huge spent months testing modern components to recreate the sound of the original RL2 to ensure that it retains all of its signature touch sensitivity and mojo. Way Huge describes the pedal as having harmonic overdrive reminiscent of a vintage tweed amp and a wide array of tones from soft and cuddly to burly and brutal, this llama can bite. But it also purrs. And screams—if you smack it just right. You might lose a few fingers and toes, but you’ll be glad you did.

The Way Huge Red Llama Overdrive MKIII is available for $149.99 from retailers worldwide or directly online from www.jimdunlop.com.

A chambered body and enhanced switching make this affordable Revstar light and loaded with tones.

Scads of cool tone combinations. Articulate pickups. Relatively light. Balanced and comfortable. Well built.

Some P-90 players might miss the extra grit the Revstar trades for articulation.

Yamaha Revstar Standard RSS02T usa.yamaha.com

While the Yamaha name is famous in circles beyond the guitar world, they’ve made first-class guitars since the 1960s. And while they don’t unleash new releases with the frequency of some larger guitar brands, every now and then they come down the mountain with a new axe that reminds us of their capacity to build great electric 6-strings. In 2015, Yamaha introduced the first generation Revstar. With a handsome aesthetic inspired by the company’s motorcycle racing heritage, the Revstar combined sweet playability and vintage style touchstones. This year, Yamaha gave the Revstar an overhaul—including body chambering, updated pickups, and new switching. What’s impressive is how these alterations enhance the already impressive playability and versatility of the original.

At a glance, the newest Revstars look a lot like the originals. And streamlined controls suggest little difference between the Yamaha and a lot of other simple 2-pickup electrics. There’s a volume knob, a tone knob, and a pickup selector. Simple, right? Not necessarily. Though the control layout is economical, it conceals a trove of tone possibilities. The pickup switch is now a 5-way selector. Positions 1, 3, and 5 are neck, neck/bridge blend, and bridge pickup settings. But positions 2 and 4 offer cool out-of-phase sounds. Yamaha also made the tone knob a push/pull pot which activates a passive boost called the focus switch. It effectively kicks up the low and mid ranges and shaves off the higher frequencies. In the case of our review guitar, the revised circuit is paired with a set of of Yamaha-designed VP5 P-90s with alnico 5 magnets. A humbucker-equipped model is also available.

The build quality on our gorgeous sunset burst Revstar is very nice. The double-cut body, which tastefully echoes vintage Yamaha style elements with a trace of ’60s offset lines, is built around a layer of maple over chambered mahogany. And though the construction feels substantial, it’s still light at just about 8 pounds. The carbon reinforced neck is built around a 24 ¾" scale and features a 12" radius rosewood fretboard. The tastefully subdued pearloid inlays are situated between jumbo, stainless-steel frets that will weather years of road rash before showing any wear. Unlike the deep glossy finish on the body, the back of the neck is finished in satin. It’s an absolute dream to hold and feels faster and more precise for the lack of gloss.

Yamaha succeeded in their efforts to make the Revstar more comfortable. Compared to a Gibson SG Classic, the Revstar feels a hair heavier but much more balanced. Hanging over my shoulder from a strap, it didn’t exhibit any tendency toward neck dive. This isn’t the only benefit of Yamaha’s chambered design, but it pays a big dividend in this respect.

With the Revstar out in front of an Orange OR50 and a 4x12, additional comparisons with the SG classic were enlightening and edifying. In general, the Yamaha’s P-90s have a moderately lower output, are less noisy, and exhibit greater overall clarity. While the pickups on both guitars sound similarly hefty playing campfire chords, the Revstar’s output was more articulate playing barre chords further up the neck. Lead lines from the Revstar also brandish a bit more midrange honk that begs for funk riffs. Coupled with a glass slide, the Yamaha happily morphed into a blues monster.

Pulling up on the focus switch kicks sustain into high gear. That sustain comes at the cost of some detail in the top end, but it’s absolutely perfect for long, drawn-out lead lines and slide. In the context of a full band, the focus switch is also a handy solution when you need to duck into the rhythm pocket. It’s also a breeze to flip between the two voicings. Ultimately, the focus switch shines most with high-headroom amplifiers. With smaller amps, like a 5-watt Champ, the augmented lows and mids induce speaker break-up and some mud at moderate volumes, while the “unfocused” output remained gritty, yet eloquent.

At just a shade under $800, the Yamaha Revstar is a great deal. The array of available tones is impressive. And the sharp, unique looks speak for themselves. While the P-90s are a natural fit for classic rock and blues riffage, the overall capacity for picking detail, the out-of-phase switching capabilities, and the low/mid boost feature significantly extend the guitar’s vocabulary—making the new Revstar a great companion for most pedals and very capable of being the only stage guitar you need. Whether you desire crystalline, single-coil chime or punchy, bottom-heavy power chord tones, the Revstar handles it all as gracefully as a café racer leaning into a sweeping curve, and feels great doing it.