Ultrasound pro-250 ユーザーガイド
PRO-250 Front Panel
GUITAR CHANNEL (CHANNEL - 1)
GUITAR INPUT: Instrument input. Designed for both active and passive pickups.
VOLUME: Adjusts the pre amp gain, (sensitivity), of the guitar channel. This control should be used to match your guitar
pickup to the amplifier. If amp overloading occurs when using this unit with an active pick up system be sure to decrease
this level until the overloading situation ceases.
BASS: Adjusts the amount of cut or boost in the low frequency range.
TREBLE: Adjusts the amount of cut or boost in the high frequency range.
NOTCH FILTER HZ: Sets the frequency of the 18db cut NOTCH FILTER that is used to control resonant feedback.
Notch Filter: ON/OFF - Enables or disables the notch filter control.
EFX LEVEL: Controls the amount of digital effect mixed in to the guitar signal from 0% to 50%.
EFX MODE: This is a rotary encoder, which selects 1 of 16 different digital effects. See Digital Effects Program List.
SHAPE: ON/OFF This toggle switch enables or disables the SHAPE control. The shape control is a mid dip control. In the
on position the mid frequencies will be cut and the high and low frequencies will be boosted.
VOLUME: Adjusts the pre amp gain, (sensitivity), of the guitar channel. This control should be used to match your guitar
pickup to the amplifier. If amp overloading occurs when using this unit with an active pick up system be sure to decrease
this level until the overloading situation ceases.
BASS: Adjusts the amount of cut or boost in the low frequency range.
TREBLE: Adjusts the amount of cut or boost in the high frequency range.
NOTCH FILTER HZ: Sets the frequency of the 18db cut NOTCH FILTER that is used to control resonant feedback.
Notch Filter: ON/OFF - Enables or disables the notch filter control.
EFX LEVEL: Controls the amount of digital effect mixed in to the guitar signal from 0% to 50%.
EFX MODE: This is a rotary encoder, which selects 1 of 16 different digital effects. See Digital Effects Program List.
SHAPE: ON/OFF This toggle switch enables or disables the SHAPE control. The shape control is a mid dip control. In the
on position the mid frequencies will be cut and the high and low frequencies will be boosted.
MIC/AUX CHANNEL (CHANNEL - 2)
MIC INPUT: XLR input designed for direct connection of a microphone.
AUX INPUT: 1/4” input designed for connection to an instrument such as a guitar or keyboard, and can also be used for
connection to a line level signal from a digital effects processor.
MIC VOLUME: Controls the volume of the microphone signal.
AUX VOLUME: Controls the volume of the Aux. signal.
BASS: Adjusts the amount of cut or boost in the low frequency range.
MID: Adjusts the amount of cut or boost in the mid frequency range.
TREBLE: Adjusts the amount of cut or boost in the high frequency range.
EFX LEVEL: Controls the amount of digital effect mixed in to the Mic/Aux signal from 0% to 50%.
EFX MODE: This is a rotary encoder, which selects 1 of 16 different digital effects. See Digital Effects Program List.
OVERLOAD LED: This indicator will illuminate when an overload situation occurs in the Channel - 2 pre-amp section. IF
an overload is detected in either the Mic Input front end, Aux input front end, or the tone controls this LED will illuminate.
This is very useful when setting up Channel - 2 for different Microphones, instruments, or effects processors. To remedy
an overload situation the corresponding Volume control on the PRO or on the connected instrument can be turned down
until the LED does not illuminate.
AUX INPUT: 1/4” input designed for connection to an instrument such as a guitar or keyboard, and can also be used for
connection to a line level signal from a digital effects processor.
MIC VOLUME: Controls the volume of the microphone signal.
AUX VOLUME: Controls the volume of the Aux. signal.
BASS: Adjusts the amount of cut or boost in the low frequency range.
MID: Adjusts the amount of cut or boost in the mid frequency range.
TREBLE: Adjusts the amount of cut or boost in the high frequency range.
EFX LEVEL: Controls the amount of digital effect mixed in to the Mic/Aux signal from 0% to 50%.
EFX MODE: This is a rotary encoder, which selects 1 of 16 different digital effects. See Digital Effects Program List.
OVERLOAD LED: This indicator will illuminate when an overload situation occurs in the Channel - 2 pre-amp section. IF
an overload is detected in either the Mic Input front end, Aux input front end, or the tone controls this LED will illuminate.
This is very useful when setting up Channel - 2 for different Microphones, instruments, or effects processors. To remedy
an overload situation the corresponding Volume control on the PRO or on the connected instrument can be turned down
until the LED does not illuminate.
MASTER SECTION
HORN VOLUME: Adjusts the amount of signal being sent to the on board electronic crossover which feeds the separate
high frequency power amplifier. A higher setting of this control adds crisp clean high end to the sound of the amplifier
which makes this control one of the most important when setting up your PRO for your applications. If you are playing an
acoustic instrument a higher level on the Horn Volume control will be desirable. If you are playing an electric guitar
through a digital efx processor a lower Horn Volume level may be more desirable to reduce any harshness. The Horn
Volume control when used in conjunction with the separate Treble controls in the pre-amp sections will give you a lot of
control and flexibility over the high frequency section of the PRO.
MASTER VOLUME: Adjusts the overall loudness of the amplifier.
high frequency power amplifier. A higher setting of this control adds crisp clean high end to the sound of the amplifier
which makes this control one of the most important when setting up your PRO for your applications. If you are playing an
acoustic instrument a higher level on the Horn Volume control will be desirable. If you are playing an electric guitar
through a digital efx processor a lower Horn Volume level may be more desirable to reduce any harshness. The Horn
Volume control when used in conjunction with the separate Treble controls in the pre-amp sections will give you a lot of
control and flexibility over the high frequency section of the PRO.
MASTER VOLUME: Adjusts the overall loudness of the amplifier.