If you would like to "D" tune your "E" string almost instantaneously, without changing string tension and not having to transpose, then the Ex Factor is your only choice.The Ex Factor extended string bass and Factor 4 got its name from ergonomics, the study of the relationship between people and their working environment. Also known as Human Factors, this science was the foundation for the engineering parameters and the inspiration for the name.
Function and balance were addressed by designing a body mounted tuner/bridge module to redistribute weight, making the Factor 4 series absolutely not head heavy. Tuning knobs mounted at comfortable 35 degrees from the body make tuning easy, fast, and accurate. 
The Ex Factor and Factor 4 bass hangs perfectly balanced around your body, in the proper playing position keeping player fatigue to a minimum. Because you're using less energy to keep your bass in a natural playing position, you'll find playing less tiring and more inspired.

The Ex Factor 4 string bass has a 32" scale and allows the "E" string to be released to a longer "D" length of 36". The Factor 4 string bass has a 34" scale without a string extension. Both models available in fretted or fretless, or fretless with lines.

The Key Factor 4 and 5 string basses are Schaller key headed versions of the Factor 4. They both have the same electronics, a 34" scale, hard rock maple neck, East Indian Rosewood fingerboard with a 7.5" radius with side dash position markers. Kubicki designed and manufactured bridges and knobs are anodized black aluminum. Key Factor owner: Please take notice of how the strings are wrapped around the key post of your new bass. Some are on clockwise and others counter clockwise. The tuning knobs always tune up counter clockwise--the standard way.

The Ex Factor bass has a 32" scale and a 36" extended string. The shorter scale requires the use of a slightly heavier gauge string. The 32" scale is 6 per cent shorter than a 34" scale with a net loss of 6 per cent tension. That's why we recommend our strings in either nickel or stainless steel, and they do not require trimming. Kubicki Ex Factor strings are the only strings developed specifically for your Ex Factor bass. String Installation Technique: To prevent strings from popping out of the wheel, simply bend the string in the following manner. After placing the ball end in the head and the tail end in the wheel, bend the string toward the neck. Remove the string from the wheel and bend it. The extra bend will make it stick in the wheel better.


Stocked with volume/blend, bass/treble pots, and six position rotary switch, you are provided with three pre-set passive, two fully adjustable active tone circuits and a standby mode, giving you all the tones you want. 

All Factor basses have the same Kubicki engineered and manufactured circuit boards. Powered by two 9 volt alkaline batteries, the system will provide 1000 hours of service.


Active Electronics

Your Kubicki bass is equipped with hybrid passive and electronic circuitry. Choosing between 3 passive and 2 active modes will depend on your requirements. Each mode has its own distinctive tonal characteristics. For equalization the signal can be boosted to 25 dB in the active modes by the battery powered solid state electronics.


The special humcancelling pickups on your Kubicki bass work as either active or passive pickups, depending on how the active electronics controls are set. They are fully adjustable for height and tilt. Pickups plug into the circuit board.

The Tuner

The patented tuner/bridge module is a body mounted tuning system that replaces tuning keys on the head. This is what makes the bass absolutely not head heavy. To install a string, place the ball end into a bronze cup in the head of the neck. The tail end is then inserted into a hole in a wheel in the bridge. Bend the string towards the neck and roll the wheel by hand to ratchet up all the excess.

The tuning knob can then be rotated to tune the string to pitch. The tuning knob glides on a ball bearing and tunes at an 80 to 1 ratio. Removing a string involves loosening the tuning knob until the string is loose, then pressing down on the ratchet spring head, allowing the wheel to rotate in the opposite direction as the string is pulled off.

The Bridge

The patented bridge is an integral part of the tuner. The bridge head holds an assembly comprised of a saddle post that is threaded into a saddle slider. The saddle slider can be adjusted to achieve intonation and can then be locked in place with a screwdriver.

The saddle post can be adjusted for string height by rotating it up or down. The saddle and saddle slider are made of stainless steel.

The Laminated Neck

Because there are no keys on the headstock to counteract the weight of a vibrating string, the neck had to be made stiffer. I wanted to avoid graphite because it's not adjustable with a truss rod and is more expensive than a 34 laminate neck. Laminates are perpendicular to the ebony fingerboard so this accumulated glue joint tension make the necks unwilling to twist.

Adjusting the Truss Rod

Use a standard screwdriver--either Phillips or slot type. 

You can sight down the neck, rotate the nut while sighting down the neck, and there is no need to loosen the strings.

The String Extension/String Clip


The patented string clip is available only on the Ex Factor. While holding the bass in playing position, push the spring loaded string clip up with the thumb of the left hand. Pull the string out from under the clip head with your finger and release the lever. You are now in concert tension "D" and all the notes on the scale remain the same--no transposing. Pushing the lever up causes the lever to re-grab the string, and you're back in "E" again. It's very quick and easy to become adept at pushing the lever to the desired position. When the string is in "D" tuning, you also have a "D#" note available.

Factor™ Philip Kubicki || Web Designer: Gregory Morton.