Motion Sound PRO-145 - Manual (Page 4)

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Treble – Frequencies from 3kHz to the “high cut” setting are adjusted. Treble affects “key click”
and “percussion” as well as overall brightness. Remember that classic 147’s did not have much
treble so start out at “N”. The treble and “high cut” can over lap so both controls can be tried at
different settings to refine your sound.
High Cut – This control is very useful for reducing the shrillness and brightness of some digital
instruments. Classic 147 and 122 rotary speakers had high frequency limits of about 5kHz. A
setting of “N” (3kHz) through 7 (6kHz) will emulate those classic cabinets high frequency tone.
Horn – The balance between the low rotor and horn volume can be adjusted to preference.
Higher numbers make the horn louder. The “N” setting is equal volume but room brightners and
listening position can change this perception.
Sub Volume – A front panel ¼” output provides line level audio < 100 Hz 18 dB/octave roll off.
Set the volume to “5” and then set your subwoofer amplification to desired level. Adjustments
can then be easily made from the PRO-145.
Direct Output – Provides a non-rotary line-out signal that includes all pre amp and EQ controls.
Another amplifier can be used to provide non-rotary sound. A second PRO-145 can also be
connected here.
Speed Control – The supplied dual button LED pedal is connected here and functions as
described. Buttons are, Push ON- Push OFF.
Fast – “LED on” – rotors ramp up to fast speed settings. (TRS tip open)
Slow – “LED off” – rotors ramp down to slow speed settings. (TRS tip grounded)
Stop – “LED on” overrides speeds, rotors ramp down to a complete stop. Pressing the
“stop” button again LED goes off and rotors ramp to the speed setting fast or slow.
Stop overrides all speed settings. (TRS ring open)
Front Panel Fast LED – Is ON only when fast speed is selected and stop is not engaged.
-Motor Controls-
The PRO-145 uses electronic speed control for all dynamics of the horn and low rotor drum.
Precision low noise DC motors and ball bearing rotor supports are utilized providing a zero
maintenance, modern rotary system. Adjustments cover the dynamics of a well used but
maintained 147.
Accel – Trims the ramp up time of the rotors. CW=Faster ramp up
Decel – Trims the ramp down time of the rotors. CW=Faster ramp down
Fast – Trims the terminal fast speed of the rotors. CW=Faster