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Description

The Univox U-45B is a classic choice for guitarists seeking vintage warmth and character in a compact package. Known for its iconic tube-driven sound, this amplifier cabinet is perfect for smaller gigs, recording sessions, or home practice. Originally produced in the 1960s, the U-45B has made a comeback thanks to its rich tonal qualities that can seamlessly blend with both clean and distorted setups. The amp's simple yet effective control panel allows for easy adjustments, making it accessible for musicians of all skill levels.

Featuring a single 12-inch speaker, the U-45B delivers a balanced sound that's both powerful and articulate. Its all-tube design provides a naturally warm tone that many modern amplifiers struggle to replicate. Whether you're chasing the crunch of classic rock or the smoothness of jazz, the Univox U-45B is a versatile companion that won't disappoint. This cabinet is not just about nostalgia; it's about delivering a sound quality that stands the test of time.

Key Features:

  • Tube-driven amplification for authentic vintage sound
  • Single 12-inch speaker for balanced audio output
  • Compact and portable design suitable for various settings
  • Simple control panel for user-friendly operation
  • Ideal for rock, blues, and jazz guitar tones

Product specs

Brand Univox
Model U45B
Finish Black
Year 1960s
Categories Guitar Combo Amps
Color Family Black
Direct Output No Direct Output
Electronics Tube
Number of Channels 1 Channel
Number of Inputs 3 Inputs
Output Power (Watts) 10
Reverb None
Speaker Configuration 1x12"

FAQs

What kind of music genres is the Univox U-45B best suited for?

The Univox U-45B is ideal for vintage rock, blues, and jazz due to its warm, tube-driven sound and modest 10-watt output, which provides natural overdrive at lower volumes.

How does the Univox U-45B handle pedal effects?

The Univox U-45B takes pedals well, especially overdrive and fuzz, which complement its tube-driven tone. However, without an effects loop, time-based effects like reverb and delay may sound best placed before the amp.

Is the Univox U-45B suitable for home practice?

Yes, with its 10-watt output, the Univox U-45B is well-suited for home practice, providing a full tube sound at manageable volume levels.

Does the Univox U-45B offer any built-in effects like reverb?

No, the Univox U-45B does not include built-in effects such as reverb, focusing instead on a pure, classic tube amp sound.

What is the speaker configuration of the Univox U-45B?

The Univox U-45B features a 1x12" speaker configuration, which delivers a balanced and full sound suitable for various playing environments.

How many inputs does the Univox U-45B have, and what are they used for?

The Univox U-45B has three inputs, allowing for multiple instruments or a combination of instrument and microphone connections, making it versatile for different playing situations.

What is the primary tonal characteristic of the Univox U-45B?

The Univox U-45B is known for its warm, vintage tube tone with a smooth overdrive, making it a favorite for players seeking classic 1960s amp sounds.

The Guitologist

The Guitologist

The Awesomest Vintage Guitar Amp You've NEVER Heard Of - UNIVOX U-45B

Video thumbnail for The Awesomest Vintage Guitar Amp You've NEVER Heard Of - UNIVOX U-45B by The Guitologist

The Awesomest Vintage Guitar Amp You've NEVER Heard Of - UNIVOX U-45B

The Guitologist

The Guitologist

Video thumbnail for Vintage Amp Demos (4/5) - 1966 Univox U-45B by Chicago Audio Collective

Vintage Amp Demos (4/5) - 1966 Univox U-45B

Chicago Audio Collective

Chicago Audio Collective

Video thumbnail for 1968 Univox U45B 112 Combo Guitar Amp DEMO by The Guitologist

1968 Univox U45B 112 Combo Guitar Amp DEMO

The Guitologist

The Guitologist

Video thumbnail for Univox U45B Amp - 1966 by Tom's Amps LLC

Univox U45B Amp - 1966

Tom's Amps LLC

Tom's Amps LLC

Video thumbnail for A Univox U45-B Demo and Story by Chris Decato

A Univox U45-B Demo and Story

Chris Decato

Chris Decato

Video thumbnail for 1966 Univox U45-B Guitar Amp Demo by holygrailguitars

1966 Univox U45-B Guitar Amp Demo

holygrailguitars

holygrailguitars

Reviews

PROS

  • Great sounding with killer Tremolo effect

  • Lightweight and portable 1x12 combo design

  • Japanese built chassis ensures quality

  • Distinct breakup at reasonable volumes, ideal for apartments/bedrooms

  • Highly versatile with pedals, achieving a range of tones

  • Hand-wired tube amps offer warmer, more natural sound

  • Simple to service due to hardwired tube design

CONS

  • Requires service and maintenance due to age

  • Original capacitors often leaky or shot

  • Circuit mods needed for safety, stability, and better headroom

  • May need a couple hundred dollars of professional work to be fully usable

Owner Insights

We analyzed real musician discussions from forums and Reddit to find what players love, question, and tweak about Univox U-45B.

Comparisons

  • Owners describe the Univox U-45B as a "Princeton killer," highlighting its superior sound quality over the Fender Princeton.

    Source
  • A user with experience in similar models mentions having a Magnasonic version, indicating the uniqueness of the Univox's sound.

    Source
  • The Univox U-45B circuit is similar to the Fender 5F11 Tweed Vibrolux/6G2 Brown Princeton, but uses 6BM8 triodes and pentodes for its distinct sound.

    Source

Features and functionality

  • The amp delivers 10-12 watts through a 12-inch speaker and features an open-back design, contributing to its impressive tonal depth.

    Source
  • The U-45B uses two 6BM8 pentodes in a push-pull configuration, unique for combining triode preamp and pentode power tube in one bottle.

    Source

User experience

  • Some users find that recording the amp's full tonal beauty can be challenging, as standard microphones may not capture its intricacies.

    Source

Mods and upgrades

  • Consider adding an external speaker output to the Univox U-45B to drive a 2x12 or 4x12 cabinet for increased volume.

    Source
  • Reamper options like Black Cat Unleash or Fryette Power Station can amplify the Univox's output for louder performance without altering its tonal character.

    Source

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