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Fender Blues Junior IV

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Fender Blues Junior IV Product Overview by GAK

One of the most-beloved small combo amps in the world, the Blues Junior IV adds modified preamp circuitry, smoother-sounding spring reverb and improved aesthetics that any player is sure to appreciate. A 15-watt favourite in any setting, this amp is ideal for guitarists who need to hit the stage or studio at a moment’s notice with warm tone and versatile features.

The Blues Junior IV includes a 12” Celestion A-Type speaker for well-balanced output with smooth highs, laidback midrange and full, round lows. The modified preamp circuitry has increased fullness, with greater definition and clarity. The onboard spring reverb has been modified to add smoothness, so you still get rich, shimmering tone, no matter how much reverb you use. 

The updated aesthetics include improved control panel texture and graphics, ivory pointer knobs, steel-reinforced strap handle and lightly- aged silver grille cloth, giving it the unmistakable look and vibe you can only get from a Fender amp. Reliable,  flexible and pedal-friendly, the Blues Junior IV is an ideal addition to any electric guitarist’s amp collection.

The EL-84 output tubes provide fat mid tones while warmth is provided by the 12AX7 preamp tube overdrive. There is also real spring reverb.

Also on the new III upgrade you'll find easier-to-read black control panel with front-reading text, a vintage Fender "dog bone" handle, vintage-size jewel light, "sparkle" circuit mod, rattle-reducing shock absorbers for the EL84 tubes, 12” Celestion® A-Type speaker, and heavy-duty set-screw "chicken head" knobs.

Fender Product Overview

The world's most popular tube amps just got better! Fender Hot Rod series amplifiers are found on every stage in the world, large and small, and are used by guitarists from all walks of life. Hot Rod amps deliver unmistakable Fender tone and are the perfect platform for musicians to craft their own signature sound. These no-frills amps are affordable, reliable and loud, and they pair extremely well with stomp boxes. The Blues Junior III is a 15-watt warm-toned, longtime favourite the perfect grab-and-go tube amp for stage and studio. It is known for the fat mid tones characteristic of EL-84 output tubes, warm 12AX7 preamp tube overdrive, real spring reverb, simple control layout, foot switchable FAT boost and external speaker capability. Additional Blues Junior III upgrades include an easier-to-read black control panel with front reading text, new badge, vintage Fender "dog bone" handle, vintage-size jewel light, "sparkle" circuit mod, rattle-reducing shock absorbers for the EL84 tubes, 12” Celestion A-Type speaker, and heavy-duty set-screw "chicken head" knobs.

  • Wattage: 15 Watts
  • Inputs: One
  • Extension Speaker Jack: External Speaker Jack
  • Channels: One Channel
  • Rectifier: Solid State Rectifier
  • Controls: Reverb, Master, Middle, Bass, Treble, "Fat" Switch, Volume
  • Hardware Finish: Chrome
  • Pilot Light Jewel: Red Amp Jewel
  • Handle: "Dog Bone" Handle
  • Front Panel: Black Front Panel
  • Grill Cover Cloth: Black Textured Vinyl Covering with Blackface Style Black/Silver Grille Cloth
  • Input Impedance: 1 M Input Impedance
  • Output Impedance: 8 Ohm
  • Amplifier Length: 9.18" (23.31 cm)
  • Amplifier Width: 18" (45.72 cm)
  • Amplifier Height: 16" (40.6 cm)
  • Amplifier Weight: 31 lbs. (14.06 kg)
  • Effects: Spring Reverb
  • Speaker: 12 inch, 8 ohm 50 Watt Fender "Lightning Bolt" speaker by Eminence
  • Pre Amp Tubes: 3 x 12AX7
  • Power Tubes: 2 x EL84
  • Unique Features:
  • -Black control panel
  • -New badge
  • -Rattle reducing shock absorbers for EL84 tubes
  • -Fat Switch
  • Knobs: Chicken head-style amp knobs
  • Footswitch: Uses Optional 1-Button Footswitch (not included)
  • Cover: Optional Amp Cover Available (not included)



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GAK.CO.UK LTD is registered in England and Wales 04578270. Registered office: 30 - 34 North Street Hailsham East Sussex BN27 1DW GAK.CO.UK LTD acts as a credit broker and only offers credit products from Secure Trust Bank PLC trading as V12 Retail Finance. GAK.CO.UK LTD is an appointed representative of The Guitar Amp and Keyboard Centre Limited which is authorised and regulated by the Financial Conduct Authority. GAK.CO.UK LTD FCA registration number is 731400. The Guitar Amp and Keyboard Centre Limited FCA registration number is 684977. Credit provided subject to age and status

V12 Retail Finance Limited. Registered in England and Wales 4585692. Registered office: One Arleston Way, Solihull, B90 4LH. Authorised and regulated by the Financial Conduct Authority. Our FCA reference number is 679653.

Customer reviews

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  • Simon Connor


    Excellent amp at relatively low cost. Amazing power for size and also good and responsive at low volume

  • Keith Gibson


    Finally decided to replace my old green board Blues Junior (including billm mods) with a new version IV. Fender’s improvements to tone and reverb are excellent, though I would have preferred an adjustable bias for the power valves. My first observation was an unusual mix of Groove Tubes in the preamp (V1 JJ, V2 Sovtek and Shuguang for the V3 PI) so I installed my own set of preferred OEM valves from years of research and ‘tube rollling’. The Groove Tubes sounded much better - smooth, rich overall tone and a more punchy bass response, and the output valves are perfectly balanced. I will pay the extra and replace with the same Groove Tubes in the future. Probably worth noting that Fender still ship their Amps to the UK set to the EU harmonised mains voltage of 230V, when the mains transformer has a dedicated 240V tap. Overall very impressed with the new version and would highly recommend it.

  • Customer Ian McLaughlin


    Very Pleased my Fender Blues Junior IV amp that I purchased from G. A. & K., the service I received from them was superb the amp arrived in perfect condition & on time I cannot thank them enough. I already have a very old Fender Amp but the Blues Junior is really ideal for me, as I generally only play at home nowadays and with my pedals I can achieve a great sound at lower volumes, however if I do a Gig the amp has plenty in store to deliver in the local pubs & clubs when open.

  • Bob Currie


    Great amp. Everyone says they are good and they are. I had a Fender Champ before, but this is different league.

  • Steve


    15 watts? You're kidding me! This thing is loud, takes pedals well and is an overall improvement on the Blues Junior III. I would prefer the speaker grille to be covered in the original bright fabric as this looks like it's been in a smoke filled room for several years, but it still gets 5 stars.

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