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The largest of the "4" series bass amplifiers, the UL4120 was produced in very small numbers as was the UL7120.
Lacking the reverb and vibrato effects of the UL7120 and with the a small change in the mixing resistor and the input capacitor in the pre-amp section, the UL4120 and the UL7120 are identical as is the rear control panel features. The "4" series mixing resistor being a 470k resistor and the input capacitor being 2.5mfd in value. The "7" series mixing resistor being 220k and the input capacitor being 2.2.mfd. |
| Features | |
|---|---|
| Output Power | 120 watts |
| Tube Compliment | Two ECL86's, one EL84 and a quartet of KT88's. |
| Channel One |
Two inputs,
Top boost switch, Volume, Treble, Middle, Bass. |
| Channel Two |
Two inputs,
Top boost switch, Volume, Treble, Middle, Bass. |
| Speaker(s) | 4x12" G12H 25w Alnico Celestions + 2 Midax HF 17w Horns |
| Size (Head) | 24" W x 10" H x11.25" D |
| Size (Speaker Cabinet) | 27" H x 40" W x12" D |
| Accessories | Covers, foot pedal and chrome trolley. |
