Description
Not every amp in a bass player’s world needs to push low end — sometimes you need a killer little rig for tracking guitar parts, running a side project, or handing off to the guitarist in your band who keeps borrowing your gear anyway. The Pro Junior IV is that amp: a 15-watt all-tube combo dressed in lacquered tweed with ’50s-style grille cloth, a chrome panel with the red jewel light, and a leather handle for grab-and-go gigs.
Under the hood it runs 2x EL84 power tubes and 2x 12AX7 preamp tubes into a single 10″ Jensen P10R speaker, giving it a tight, balanced voice with plenty of top-end sparkle. Fender reworked the volume circuit on this version so it breaks up more gradually — you get a wider useful range before things turn gnarly, and the low end stays firmer and more defined even when you push it into overdrive. That makes it a genuinely flexible little box: clean and glassy at low volumes, thick and mean once you dig in, and easy to shape further with pedals in front.
Specs at a glance:
- Model: Pro Junior IV, Lacquered Tweed, 120V (Model # 2231300000, Hot Rod series)
- Amplifier type: Tube, solid state rectifier
- Power tubes: 2x EL84 / Preamp tubes: 2x 12AX7
- Speaker: One 10″ Jensen P10R, 8 ohms total impedance
- Inputs: One 1/4″
- Cabinet: 3/4″ particle board, lacquered tweed covering, vintage leather strap handle
- Dimensions: 10 x 17 x 17 in / Weight: 20 lb
Compact, dead simple to operate, and stage-ready looking — a solid grab for anyone who wants a real tube amp on hand that isn’t trying to be a bass rig.









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