"I was psyched to discover the GCS-3 - I was needing to put together a "no amp" super compact rig ... Just bringing a strat and this tiny pedalboard I put together with the GCS-3 as the last thing in the chain... It doesn't just sound good, it feels good. I'm looking forward to dialing it in even more and am so psyched with the idea of being able to show up with one guitar and a few pedals/boxes and go straight into the PA and sound great."

-- Ian Ethan Case

"The GCS-2 is an analog guitar cabinet simulator with enough variable parameter control to satisfy the most demanding stage, studio or bedroom guitarist (or anyone else who needs a great speaker sim.) Designed by David Tarnowski, the man behind all of the great ADA products, the GCS-2 doesn't fail in its mission: It sounds realistic and utterly convincing. Check it out and see if you can resist."

-- Brett Kingman, Guitar Player and Reviewer, extraordinaire

ADA GCS-2 and GCS-3 features:

ADA GCS-3 Additional Features:

GCS-2 / NEW GCS-3 Guitar Cabinet Simulator & DI Boxes

featuring Natural Resonance Response


Turn any full-range passive or powered monitor speaker or sound system into a dynamic guitar cabinet, loaded with your choice of drivers.

Get incredible guitar tone with ADA’s new analog GCS Series “Natural Resonance” miked cabinet simulators.

No mics, power amps, guitar cabinets needed.  Just take your guitar signal from your pedal board, preamp or power amp (GCS-3 only) and send it to the house sound console or board or powered full-range cabinet.

The NEW GCS-3 Guitar Cabinet Simulator & DI Box


Select from vintage or modern, 10 or 12 inch speakers in a sealed or open back cabinet to get the powerful and rich resonance of a real guitar cabinet, and then dial-in the position of your microphone to balance it out.  Here’s what guitarists are saying about the GCS family of Cabinet Simulators.


“This is BY FAR the best Cabinet Simulator we have ever heard. It's 100% analog and works incredibly well with both amplifiers and pedals.”

“I am really glad with the sounds I get - finally I can connect my archtops through a PA and make them sound like an electric guitar.  It's also great it can be just a regular DI for my acoustic.”

“David – the GCS-2 is simply awesome! I did a quick little A/B recording for a friend of mine who is a roadie for Clint Black (and a few others) because I thought he had to hear it since it’s such an amazing tool. Thanks again for the hookup, this thing is going to get some use!” 

“I have spent 2 years trying to get the perfect sound from my hand built Vyse valve amp into my recording system and cab simulation has defeated me for a long time.  I plugged the GCS-2 straight into the line out of the amp, flicked to traditional 12", open-back and tweaked the microphone placement to about 1/3rd and low and behold I couldn't really hear the difference between the headphone sound and the live amp. I am overjoyed, it's genius - thanks to all who developed it.”

“I use two of your GCS2 simulators for live work here in the UK and very good they are too ..congratulations on a great unit.”

ADA GCS-2 Guitar Cabinet Simulator & DI Box



The ADA GCS family are ideally suited for live performance and studio applications.  A unique feature of the GCS' is that it replicates the low frequency natural resonance of a guitar speaker cabinet at loud volumes, which is especially noticeable in the SEALED CABINET configuration.  

The ADA GCS is inserted between the output of your preamplifier (or effects pedal chain) and a mixing or recording console to replace the close proximity microphone that is typically used to mic a guitar speaker cabinet.  This eliminates the problem of bleed through or crosstalk from other instruments or amplifiers in live situations.  GCS are especially useful for owners of our APP-1 guitar pedal preamp because it can split the output of the APP-1 for sending the signal to a guitar amplifier and to a mixing console for recording, house sound systems and stage monitor systems.

We have tested the GCS-2 and GCS-3 in live performances by sending a feed to a stage monitor for the guitarist and eliminating the combo or head with stack. The same feedback that you get from a stack or a hot-rod combo can easily be produced in the monitor, and interestingly, with more control.