Jon Johnson Report post Posted April 11, 2017 The Ace tone Top-1 Combo Organ was a "go to' combo organ for electronic musicians wanting to expand their instrument setup. The unit was compact but with full controls for adjust tones. Top-1 features: Knobs: Bass Volume, Vibrato Depth, Vibrato Speed, Bass/Treble Balance, Volume Tabs: Double Bass, Flute, Organ, Sax, Reed, String, Treble, Vibrato On/Off The Bass section may be switched to extend the treble section (with the Double Bass tab, I think). The Treble tab adds brightness . View full synthesizer Share this post Link to post Share on other sites