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 Catalyst 100
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.
Six Amps in One
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.
There was headroom to spare and it’s impressively dynamic and responsive to picking nuances.
No Jumping Through Hoops Running Loops
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.
One watt sounds monstrous in this '50s-meets-modern mighty mite.
Solid class A tone at an affordable price. Responsive and fun to crank. Simple design. Line level signal from the line-out jack adds useful functionality.
Probably too quiet for a gig-able clean tone.
Supro Delta King 8
Since its 2014 revival, Supro has given fans of small, low-wattage combos plenty to talk about. This should come as no surprise. Tiny but ferocious amplifiers with the Supro logo have been on the scene since the early days of the electric guitar and landed on some of the most classic guitar records of all time. And the company's recent offerings have captured the sonic essence of those vintage models with a line of well-built, modern amps that look just as cool as they sound.
Thus far, the current Supro team have drawn inspiration primarily from their 1960s models. But the new Delta King series digs in a little deeper, delivering the sound and aesthetics of their 1950s combos—stripes and all. The Delta King 8 is the tiniest of the bunch, offering just 1 watt of all-tube class A power via a single 12AX7 preamp tube and a single 12AU7 power tube. While it may be small, this amp lives up to the sonic legacy of its vintage predecessors and projects a surprisingly fearsome roar.
- Clip 1: Controls at noon, miked.
- Clip 2: Controls at noon, direct line out signal.
- Clip 3: Full volume, tone control at noon, full master volume, miked.
- Clip 4: Full volume, tone control at noon, full master volume, direct line out signal.
- Clip 5: Full volume, tone control at noon, master volume muted, line out plugged into a 1971 Fender Deluxe Reverb, miked.
Robust, Balanced, and Nasty
Playing the Delta King 8 is immediately satisfying. Using Telecaster- and Jazzmaster–style guitars, I set all three knobs—volume, tone, and master—to noon and got a clean, smooth, midrange-focused tone. This is, however, just about all of the clean volume that this amp has to offer. Turning the volume knob above noon gently eases the combo into an overdriven sound that, at full volume, is gnarly and cutting but retains warmth and clarity. The boost switch bumps the volume and adds a little more gain. Naturally, I had the most fun with everything cranked and the boost on. But while it's impressively loud for 1 watt, the Delta King 8 will be most useful for recording, practicing, or for extremely quiet gigs.
Turning the volume knob above noon gently eases the amp into an overdriven tone that, at full volume, is gnarly and cutting but retains warmth and clarity.
The 8" Supro DK8 speaker sounds robust and balanced, and easily handled the overdriven tones without sounding trashy. I've probably spent too much of my life wondering about speaker swaps for other small combos, but I'd be quite satisfied with this stock speaker.
A Cure for the Backline Blues
The line-out jack on the back of the Delta King 8 provides a line-level signal that is perfect for direct recording. This feature was thoughtfully positioned before the master volume control (an unusual feature on an amp this small), which means you can get warm tube preamp tone straight into your audio interface and opt to have the speaker muted when you turn the master volume down to zero.
That isn't the only trick up the Delta King 8's sleeve. To unlock its hidden superpower, go ahead and plug the same line-out straight into another amp. In this setup, the Delta King 8 essentially becomes a tube-driven overdrive unit. Chronic sufferers of the backline blues will celebrate the fact that this little Supro can lend its low-watt, class A tone to bigger, flatter-sounding stage amps. I was blown away by the snarling sounds it generated with my Deluxe Reverb at very reasonable volumes. And by keeping the master volume up on the Supro, you can also create cool A/B blends if you mic up both amps. If you're used to playing house gear but can figure out a way to schlep an extra 15 pounds, this tiny amp could be a game-changing addition to your gigging rig.
The Delta King 8 delivers much of the vintage Supro experience in a hip, well-built package. It's fun, sounds good in clean settings, and great in more overdriven ones. At $449, it's a great deal for those reasons alone. But the convenience and versatility that comes with the addition of the pre-master line out opens up possibilities in the studio and offers solutions to backline woes that make the price even more appealing.