Ada MP-1-CHANNEL, Руководство пользователя, Страница: 4 / 19

Page 4
CONTROLS
Like the MP ‐ 1, the MP ‐ 1 ‐ CHANNEL has two controls, OD1 and OD2, to set the drive level of the
first two stages and the following stages 3 and 4. With this flexibility, the guitarist can not only
set the amount of distortion, but control the level of even and odd harmonic distortion. Even
harmonics are generated by clipping one side of the guitar signal instead of both the top and
bottom sides of the signal for odd harmonic distortion. Even harmonics are smooth and
hollow, while odd harmonics are crunchy, harsh and, with proper setting of the tone stack,
“hairy.” Try some of the settings shown below to help get you familiar with how the controls
work.
There is one INPUT jack and one OUTPUT jack. Keep in mind that the MP ‐ 1 ‐ CHANNEL is a
stomp box and runs at INSTRUMENT levels, not LINE levels.
The VOICING switch sets the 12AX7 gain and drive equalization for CLEAN and DISTORTION
biasing. The MASTER control sets the level of the signal coming from the four gain stages of
the 12AX7s. (There are 2 stages per 12AX7 vacuum tube.)
The tone stack (BASS, MID, TREBLE and PRESENCE) is an active filter which means it can cut
AND boost the signal. When all the tone stack controls are set to 12:30 o’clock, the frequency
response is “flat” – no boost or cut. There is a difference between the MID controls of the
original MP ‐ 1 and the MP ‐ 1 ‐ CHANNEL. ADA increased the range of the MID control in the MP ‐
1 ‐ CHANNEL so modern guitar players can get a radical “scoop” of the mid frequencies. The
amount of MID boost has also been increased so players can get a “low ‐ power combo with a
10 ‐ inch speaker” sound for fuzzy comping and soloing.