Download Neural DSP Soldano SLO-100 X for Mac

In the edit

There’s a specific kind of frustration that comes when you’ve dialled in the perfect guitar tone on a real amp, only to lose it the moment you try to record. The Soldano SLO-100 X plugin from Neural DSP is built to close that gap. It’s a virtual version of the amplifier that shaped American high-gain guitar sound, and it runs right inside your DAW — or as a standalone app, which is handy for late-night writing sessions when you don’t want to fire up the whole rig.

The amp section gives you four modes: Clean, Bright, Crunch, and Overdrive. That covers everything from a clean Fender-ish chime to the saturated lead tones the SLO is famous for. Before the amp, you get a compressor, a boost, an overdrive, and a vintage chorus — four pedals that let you shape your input signal before it hits the preamp. After the amp, there’s delay and reverb, so you can build a full wet/dry mix without adding extra plugins. There’s also a transposition feature that shifts your tuning up or down without physically retuning the guitar, which saves time when you’re tracking in alternate tunings.

The X version, updated in 2024, revisits the original 2021 plugin with newer modelling technology. It still requires a 64-bit host for plugin use, but it runs on both Intel and Apple Silicon Macs, and installation is straightforward — open the disk image and run the standard installer. If you’re after that aggressive, articulate Soldano sound without the volume and the hassle, this is a solid way to get it.

The 2024 X update feels different in the first few minutes

The jump from the 2021 Soldano SLO-100 plugin to the X version in 2024 is one of those updates you notice in the first few minutes of playing. The modelling technology has been revised, which means the amp reacts more like the hardware does when you dig in or back off. The Clean mode has a bit more headroom before it breaks up, and the Overdrive mode feels less stiff — you can roll the guitar volume down and still get a usable rhythm sound without flipping switches.

For anyone who tracks regularly, the most practical change is how the plugin sits in a mix. The updated modelling seems to handle the low end with more control, so palm-muted chugs don't turn into mud as quickly. The reverb and delay in the post-amp section also benefit from the revision; they feel more integrated with the amp tone rather than layered on top. Because the X version was offered as a free update for existing users, there's no reason to stick with the older release if you already own it.

Starting as a standalone app to find your sound

I usually start a session by opening the plugin as a standalone app — no DAW, no project file, just the interface and a guitar plugged in. That first five minutes is about finding a sound that fits the song, not tweaking for perfection. I set the amp to Crunch mode, keep the gain around halfway, and play a few riffs to see how the amp responds to picking dynamics. The four preamp pedals are right there, so I'll click the boost on if I need a little more presence for single-note lines, or engage the compressor if the part calls for sustained chords.

Once I've got a basic tone, I move into the DAW and load the plugin on a track. The nine-band equalizer with high-pass and low-pass filters comes into play here — I cut the lows slightly to clean up the low end, especially for parts that share space with a bass guitar. The cabinet simulation is next; I scroll through the preset options until I find a speaker and mic combination that matches the character I heard in the standalone session. If I have an impulse response file from a previous recording, I load it as a user cabinet file instead.

For the arrangement, I use the transposition feature when I want to track a part in drop tuning without actually retuning the guitar. It saves the time I'd otherwise spend tuning down and re-setting intonation. The doubling effect comes in handy on choruses — I duplicate the track, shift one side slightly, and the plugin handles the rest. By the time I'm adding delay and reverb from the post-amp section, the mix is already close to finished without reaching for other plugins.

Engaging the overdrive pedal tightens your tone immediately

If you're opening the Soldano SLO-100 X for the first time, there are a few settings that make an immediate difference. Start with the preamp section: the overdrive pedal is worth engaging even at low drive levels, because it tightens the low end before the amp stage. Pair that with the Bright mode on the amp for a lead tone that cuts through a dense mix without excessive gain.

The nine-band equalizer is where you can shape the sound to your room or headphones. Set the high-pass filter to around 80 Hz to remove subsonic rumble, and adjust the low-pass filter to around 8 kHz if you want a darker, more vintage voicing. The cabinet section offers hundreds of preset options, but I'd suggest starting with a single speaker and a dynamic microphone placement before trying the more complex multi-mic setups — it gives you a clearer reference point for what the amp itself is doing.

New this release

• The X version revisits the original plugin with updated modelling technology.

Mac it needs

• macOS 10.15 or later
• Intel or Apple Silicon Mac
• 64-bit host software for plugin use