Tomsline ASR-3 Shaper Cabinet Simulator Effect Pedal

In this post, I’ll show you how I am using a Tomsline Aroma ASR-3 Shaper Cabinet Simulator effect pedal in my analog guitar effects chain to simulate some well-known guitar speaker cabinets. This pedal helped me solve an issue I had when I wanted to record a quick demo, but I didn’t have physical guitar cabinets to provide the output from my amps. In addition, I now have 11 guitar cabinets available to me to cover both clean and high gain situations. Let’s take a look at how I implemented a Tomsline Aroma ASR-3 Shaper Cabinet Simulator effect pedal in my studio.

04 November 2020 – Written by Michael R. Myers #mykmyrs

Tags: #tomsline #aromamusic #ASR3 #shaper #cabsim #guitarcab #guitar #hotone #heart attack #review #signalchain

Skill Level: Intermediate

What You’ll Need to Get Started

ASR-3 Shaper Pedal Features

Taken directly from the user manual, here are the features that the pedal offers and an overview of the controls available. SR-3_Page_2_reduced

Signal Chain Overview

I use a Hotone Heart Attack mini-amp head. This amp is only 5 watts, but it can really put out a decently strong signal. As an added bonus, it has a built-in effects loop send and return. You can also plug in headphones for silent practice, or a line out to your computer or audio interface. A point to understand here is that with headphones or a line out cable, all you’re going to hear is the amp’s raw output, which is pretty harsh. Hotone_Heart_Attack_Front

Since this is a true amp head, it expects to be hooked directly into a speaker cabinet with its Speaker Output connection. But with some amplifier know-how, we can send the amp’s output through the Effects Loop Send jack with a mono TS cable directly to the ASR-3’s input jack to simulate a real speaker cabinet’s output sound. Hotone_Heart_Attack_Rear

Now that the ASR-3 has received the raw amp output, we can select the cab we want to emulate and set its EQ knobs to our own personal taste.

Use the large white knob to move through the 11 amps available to you. There is also a volume knob and a color knob, which is a tone control.ASR-3

As you can see in the list below, the pedal offers a set of well-known speaker cabinet simulations. There are clean and high gain cabinets available to allow for a more dynamic experience, if desired.Cab_List-1

Finally, hook theASR-3’s output jack to powered speakers, a powered studio monitor or your digital audio interface and listen to the magic.

FYI – You can hear how the pedal’s cabs sound on some videos on YouTube. Most of the reviews are not in English, but that doesn’t really matter much since you’re probably looking to hear the output of the pedal anyway.

If you’re looking for other guitar and bass amp cabinet simulators, read my previous post where I showed the Valeton Coral Cab effect pedal.


We’ve covered how to use a Tomsline Aroma ASR-3 Shaper Cabinet Simulator effect pedal in your analog signal chain for your guitar amp. For people who may not want to use digital amplifier and speaker cabinet simulators, this pedal can provide similar capabilities with analog gear. By providing 11 guitar cabinets on one unit, you can get a lot of different sounds for one purchase price. If you can pick one of these units up used, I would highly recommend you do so.

If you would like to add to this content to help other folks, please contact me and let me know what you have in mind.