Roar Quad 15, Руководство пользователя, Страница: 13 / 28

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MID
- Adjust the level of mid frequencies from the preamp
- The mid control attenuates the mids at a certain frequency set by the
“FREQ” control, which lets you change the fundamental sound of your amp
Note that if you turn the mid control up fully, the “Freq” control will have no effect since
there will be no attenuation of the mids. However, at this setting the mids will appear to
be boosted. Most tube amps have a mid control that will only attenuate the mids at a
certain center frequency between 300Hz – 800Hz, not boost the mids. It is this center
frequency that gives a certain amp a “British” or “American” sound, among other factors, of course.
FREQ
- Adjust the center frequency for the “MID” control
- MIN position: Lots of upper mids. Raw and crunchy. Less chunky/boomy bass
- MID position: Chunky bass and body with more upper mids for a raw sound
-
MAX position:
Lots of body and lower upper mids. Turn up the treble to add presence or lower the Bass
resonance control if necessary. In a mix, this setting gives a more “leaned back” sound to give space to other
instruments
The graph shows the frequency response for different settings of the FREQ control with the MID control turned all the
way down.
The Freq control is also a powerful tool to match the mid/treble character of different speakers. A honky or edgy
speaker can be tamed by “scooping” the high-mids while adding more treble to compensate.
TREBLE
- Wide range, classic treble control
- Use it to balance the bass/treble level as the last step dialing in your tone.
By tradition most amplifiers come with presence controls, which control the highs by adjusting the feedback from the
speaker to the power amp, similar to the bass resonance control. Usually, the frequency content of the presence control is
a bit higher than the treble control, but in practice there’s often little tonal difference between treble and presence
controls, which is why presence controls have been avoided for the Quad15.