When we set out to develop the Twin-City, we had several key issues that we felt needed to be resolved in order to bring a truly effective solution to market.

At one extreme - we already offered the Switchbone™, which by all accounts, is one of the finest ABY switchers ever made. Although terrific, the Switchbone is quite large, requires a special 15 volt power supply and has more features than most players need. At the other extreme – The BigShot ABY™ is a passive true-bypass switcher. Although great for the purist, true-bypass switchers introduce noise that can be very audible with high gain amps and can lead to hum and buzz problems due to ground loops. And since it does not require any power, it does not have any LED indicators that is important for some players.

Class-A buffering

In order to ensure the signal remains as transparent as possible, we chose to use the same Class-A buffer design that is found in the Radial Switchbone and JD7™. Buffering the signal enables longer cable runs without noise and enables us to add all of the other features that are built in. It is worth noting that Radial buffers are used by Carlos Santana, John Petrucci and Steve Vai and these guys know tone! The only difference is that the circuit has been miniaturized in order to fit inside using SMT technology.

Drag Control™

Many purists do not like the sound of buffers, and this makes sense. It is like switching from a Fender pickup to an EMG active. Once the signal is buffered it tends to sound glassy. To compensate, we invented Drag Control load correction that lets you reintroduce the perfect load on the pickup so that it sounds natural. This set & forget control is 'hidden' and requires a guitar pick to adjust.

Switching noise

Both true-bypass and relay based switchers create a hard mechanical contact when they are engaged. This causes a click in the guitar amps that can be horrendous when playing through high gain amps. To eliminate the 'hard' turn-on, special electronic impulse switching (EIS) was developed that quietly does the job without mechanical failure.

Transformer isolation

When combining two amps, often times, you will get tremendous hum and buzz. This is caused by what is commonly known as a ground loop. Lifting the electrical ground is against the law and can lead to electric shock. The Twin-City solves the problem with an isolation transformer on output B.

Phase alignment

When playing two amps, they can often be out of phase where one speaker is moving forward while the other is moving backward. This causes the tone to sound distant and wide, lacking bass and mid range punch. To solve this problem, a 180⁰ polarity reverse is engaged.

Compact size

As more and more players are using pedalboards, we realized that the Twin-City had to be as small as possible. We also found that by moving the input and output jacks to the top, more pedals could be aligned for greater density.

9 volt operation

No one likes batteries or wall warts. The trend today is to use a multi-pedal power brick. To work within this arena, we chose to power the Twin-City using a standard 9V supply. This lets you power the Twin-City along side other 9V pedals without having to concern yourself with voltage or polarity issues.

LED Indicators

There is no denying... having LEDs on stage makes it easier to know which amp is active on your stage setup and removes the guess work. To this end, we added full sized LEDs to make it easy to view the status on a busy stage.

All of this to say... the Twin-City was crafted around delivering a series of solutions to address the many challenges guitarists face when dealing with two amps on stage. Today the Twin-City has become one of our top selling pedals and is on tour with stadium size acts including Lamb of God. We are confident that once you try one, you will never play without it!