Skip to main content
MusicRadar MusicRadar The No.1 website for musicians
UK EditionUK US EditionUS AU EditionAustralia SG EditionSingapore
Sign in
  • View Profile
  • Sign out
  • Artist news
  • Guitars
  • Controllers
  • Drums
  • Keyboards & Pianos
  • Guitar Amps
  • Music Gear Reviews
  • Synths
  • Software & Apps
  • More
    • Recording
    • DJ Gear
    • Acoustic Guitars
    • Bass Guitars
    • Tech
    • Tutorials
    • Reviews
    • Buying Guides
    • About us
More
  • "She knew what she'd created": Back to Black
  • Trower's '80s supergroup
  • Music theory tricks
  • Stage Tour game
  • 95k+ free music samples
  1. Guitars
  2. Guitar Amps

NAMM 2015: Orange launches the OB1 Series of bass amplifiers

News
By Joe Bosso
Published 19 January 2015

The best of "bi-amp" capabilities in 300- and 500-watt versions

When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works.

NAMM 2015: Orange launches the OB1 Series of bass amplifiers

NAMM 2015: Orange launches the OB1 Series of bass amplifiers

NAMM 2015: Orange Amplification is introduction a new line of bass amps at Winter NAMM, the OB1 line of class A/B rack-mountable bass heads, designed for bassists who like to "bi-amp," combing guitar and bass amps. The idea behind the OB1 is to add the harmonics and layers of overdrive found in guitar amps to the core tones of bass amps. And, of course, there's portability – now you don't have to lug two amps around to gigs.

From press release: The key to the OB1’s unique sound is our footswitchable Blend circuit which adds a veneer of controllable gain and increased harmonic content to the upper registers of the input signal. The lower frequencies and clean signal are left alone, staying warm and clear just as they would be in a ‘bi-amped’ setup. Depending on where the Gain and Blend controls are set, the possibilities are limitless. Punch in the Blend control to achieve anything from a transparent clean boost, to all-out filthy grind, and everywhere in between.

The OB1 300 Series

Key Features

‘Bi-amp’ Inspired Design

The OB1 splits the input instrument signal into two separate paths. One side amplifies the clean signal, with all the clarity you would expect from Orange. The other adds up to two stages of distortion to the upper harmonics only, controllable via the amp’s Gain knob. These two elements are combined using the amplifier’s Blend control which adjusts the mix between clean and dirty. The Blend control can then be remotely engaged or defeated using the optional footswitch.

The Gain and Blend’s range allows for almost anything, from a subtle level boost to cut through the mix, added girth and presence at moderate settings to fatten up chorus passages, to fully saturated savagery at the extremes. However you dial it, the OB1 always maintains the critical low end definition, right the way up to the most offensive settings!

Active EQ

The OB1’s highly responsive active three band EQ has been meticulously voiced for maximum effect with minimal fuss. With +/-10dB of boost or cut, the EQ section is located after the Gain and Blend dials take effect, allowing full control over their massive sonic range.

All Analogue Signal Path

The OB1 Series puts proper class A/B power back on the map. All circuitry is completely analogue, ensuring these amps sound expressive and musical even at ridiculous gain levels.

Rack Mountable

The OB1 Series are our first rack mountable amps, suitable for 19″ cases (2U). Enclosed in a rugged power coated steel chassis the fascia is finished in our classic ‘pics only’ styling.

Balanced & Line Outputs

Balanced DI with ground lift and line level outputs for live and studio use.

Page 1 of 2
Page 1 of 2
Orange OB1-500 bass amp head

Orange OB1-500 bass amp head

OB1-500 shares the same layout and 2U rack dimensions as the less powerful OB1-300, coupled to a full fat 500 Watt output section to move some serious air.

For more information, visit Orange Amplification.

Page 2 of 2
Page 2 of 2
Joe Bosso
Joe Bosso

Joe is a freelance journalist who has, over the past few decades, interviewed hundreds of guitarists for Guitar World, Guitar Player, MusicRadar and Classic Rock. He is also a former editor of Guitar World, contributing writer for Guitar Aficionado and VP of A&R for Island Records. He’s an enthusiastic guitarist, but he’s nowhere near the likes of the people he interviews. Surprisingly, his skills are more suited to the drums. If you need a drummer for your Beatles tribute band, look him up.

Read more
A Blackstar Unity 30 bass amp on a pink background
Guitar Amps Best bass amps 2026: Top choice bass rigs for any budget
 
 
Orange Ed Sheeran Outlowd ES3
Guitar Amps Orange Outlowd ES3 Ed Sheeran signature amp review
 
 
Laney Audiohub Lineup: combos for guitars, bass, keyboards, e-drums and more
Guitar Amps Laney welcomes all instruments to the party with refreshed Audiohub lineup
 
 
IK Multimedia Tonex Board
Guitars IK Multimedia launches flagship amp modeller that lets you run four Tone Models simultaneously
 
 
Marshall Billie Joe Armstrong 1959BJA Artist Signature
Artists A baby blue amp for a Green Day frontman: Marshall launches Billie Joe Armstrong’s “Dookie Mod” head
 
 
Friedman Jose 20 Series
Guitars Friedman's Jose 20 series pays tribute to amp guru whose mods helped shape the high-gain revolution
 
 
Latest in Guitar Amps
Positive Grid Spark Pedal
Guitars Positive Grid brings its smart amp experience to your ‘board with the Spark Pedal
 
 
A pair of Positive Grid Spark Neo Core headphones lying on a Stratocaster guitar
Guitar Amps One of my top-rated guitar practice tools just dropped to $99 - save nearly 40% on the Positive Grid Spark Neo Core
 
 
MusicRadar monthly guitar gear roundup, ft. Lzzy Hale's signature Epiphone Explorer Custom, plus new gear from Hotone, Gibson, JHS Pedals, Death By Audio and more
Guitars “His effects are bonkers in the best way possible”: The MusicRadar guitar gear roundup Aug 2026 edit
 
 
Laney Audiohub Lineup: combos for guitars, bass, keyboards, e-drums and more
Guitar Amps Laney welcomes all instruments to the party with refreshed Audiohub lineup
 
 
Friedman Jose 20 Series
Guitars Friedman's Jose 20 series pays tribute to amp guru whose mods helped shape the high-gain revolution
 
 
Neural DSP Quad Cortex
Guitars Neural DSP adds Device Presets and expands Quad Cortex functionality in biggest ever CorOS update
 
 
Latest in News
Chris Frantz, Tina Weymouth, David Byrne and Jerry Harrison of Talking Heads
Bands Radio Head: Talking Heads are to get their own pop up shop radio channel in October
 
 
GTA VI the album
Singles And Albums Great Theft Auto VI soundtrack album announced for same day as game: 19 November
 
 
Neil Young
Artists “The whole idea is to not know what you’re doing”: Neil Young on his unconventional creative process
 
 
Brent Hinds of the American heavy metal band Mastodon performs in concert during Resurrection Fest on July 02, 2022
Bands “I kept seeing him out of the corner of my eye”: Mastodon’s new album is inspired by departed guitarist Brent Hinds
 
 
Johnny Marr in his studio with some of the guitars that are heading to auction on September 17, 2026.
Guitarists “A great experience and has exceeded all my expectations”: Johnny Marr’s guitar auction raises over £3.6 million
 
 
lunacy
Tech Lunacy launches Nova platform with five free virtual instruments – but bigger things are on the way
 
 

MusicRadar is part of Future plc, an international media group and leading digital publisher. Visit our corporate site.

Add as a preferred source on Google Add as a preferred source on Google
  • About Us
  • Contact Future's experts
  • Terms and conditions
  • Privacy policy
  • Cookies policy
  • Advertise with us
  • Accessibility Statement
  • Careers

© Future Publishing Limited Quay House, The Ambury, Bath BA1 1UA. All rights reserved. England and Wales company registration number 2008885.

Please login or signup to comment

Please wait...