Tone Control

The JZ preamps comes with Active tone controls, two or three bands.

Active EQ controls change the relative strength of the response across a fixed frequency range.  The signal level can be increased or decreased. This is the type of tone control is found on most bass preamps and getting this type of control is often the reason for installing a preamp.

Features:

• Natural in all combinations.

• Flat or unchanged in the center detents so you do not loose the sound of your passive system.

• Smooth as they engage giving you control as you first move the knobs off the center detents

• Wide frequency ranges for center bands and
• Gentle slopes on the band edges so the tone controls will not start sounding artificial.

Two Band Version:

• The Bass tone control is a shelving control.
The single level can be increase or decreased by 13+ dB.
The 1/2 variation frequency is at 270 Hz.

• The Treble control is a shelving control.
The single level can be increase or decreased by 14.5+ dB.
The 1/2 variation frequency is at 1.4 KHz.

 

Three Band Version:

• The Bass control is a shelving control.
The signal level can be increased or decreased by 12+ dB.
The 1/2 variation frequency is at 120 Hz.

• The Mid control is centered at 470 Hz.
This is a wide bandwidth control meaning the control effects a wide range of mid band frequencies.
The signal level can be increase or decreased by 10+ dB.

• The Treble control is a shelving control.
The signal level can be increase or decreased by 10+ dB.
The 1/2 variation frequency is at 2.5 KHz.

 

Our Specifications are a little different than many preamps:

• The most important specs for a Bass or Treble control include the +/- variation range and the frequency at which the level changes 1/2 that amount. You can consider this to be the frequency at which the tone control effect ends.
Several other preamps list a theoretical peak frequency change point. So a Bass control might be labeled as 40 Hz instead of specifying the 1/2 max change frequency points.
We feel the 1/2 max frequency point is a more important real world spec because it will make much more difference to the player in how the tone control really feels. For example, the Bass tone control for our 2 band will feel bigger than the one for the 3 band. The level of max variation is the about same but the 1/2 max frequency point has been increased for the 2 band version.
• Our Mid range frequency spec is more typical - the center frequency and +/- variation.