Fender Blues Junior IV FSR Humboldt

Eminence Speaker, EL84 Tubes


Fender's Blues Junior is one of the most popular tube amps of all time. It combines the portable nature of a combo with the classy characteristics of an all-tube construction. 

Humboldt Features

The FSR Humboldt model benefits from a speaker upgrade. It houses a powerful, dynamic Hotrod Hempster made by Eminence; a highly-regarded brand in the industry. This vintage-voiced speaker enhances the tonal quality of the EL84 preamp tubes. Ideal crisp, studio-worthy tone. 

Natural headroom & Breakup

It's clean headroom provides plenty of range for pedals in front of the amp. But it can also be cranked to get a stunning saturated and gritty overdrive sound.

If you turn the Master control down and the Volume control up you'll push the preamp tubes harder and reduce the overall volume, causing your signal to compress and give you that sought-after bluesy tone.


Fender have improved the preamp circuit in the Blues Junior IV to give you more dynamism and richer response. This may sound like achieving the impossible, but they've simply improved on an already amazing formula.

A new improved Reverb circuit provides smoother ambient tones, no matter how loud you have it's dialled in.


  • Controls: Reverb, Master, Middle, Bass, Treble, "Fat" Switch, Volume
  • Speaker: 1 x 12" Hotrod Hempster by Eminence
  • Tubes: 3 x 12AX7 2 x EL84
  • Wattage 15W
This product is currently not available.

Andertons Music Co. Payment Methods - V12, Mastercard, VISA, Amex, Paypal More ways to pay

Credit & debit cards, Paypal and Instant Finance

Fast & Free UK Delivery

Fast shipping with reputable couriers. Next day & free to most UK postcodes when in stock!

Click And Collect

Just 10% deposit. Pay the rest on collection. No delivery charges. Same price online & in-store!

£18.8 Million Gear In stock

At our store and warehouse, ready to ship direct to you!

Andertons Music Co. Feefo Gold Rating for customer service! Unbeatable Customer Service

Based on independent reviews.