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
  • Tiny Dancer
  • Browser DAWs
  • 95k+ free music samples
  • Restring your guitar
  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
Ed Sheeran has launched a new grassroots music campaign and a signature line of busking-friendly acoustic amps.
Artists “Playing music should always be fun”: Ed Sheeran and Orange launch the “ultimate busking amp”
 
 
Orange Ed Sheeran Outlowd ES3
Guitar Amps Orange Outlowd ES3 Ed Sheeran signature amp review
 
 
Neural DSP Darklgass Ultra
Bass Guitars Neural DSP unveils the Darkglass Ultimate plugin – a fully featured digital platform for studio-quality bass tone
 
 
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
 
 
The Positive Grid Reactor series comprises a pair a 50-watt and 100-watt digital combos powered with AI.
Guitars Positive Grid's new AI-enabled combo lets you design "any tone imaginable" by text or image
 
 
Blackstar Beam Mini
Guitar Amps Best desktop amps 2026: Lightweight and portable practice solutions for guitarists of all abilities
 
 
Latest in Guitar Amps
Blackstar Beam Mini
Guitar Amps “What sets it apart is access to a humongous range of amp captures”: Blackstar Beam Mini review
 
 
Blackstar DA5 Ruby Doug Aldrich Combo
Artists Blackstar shrinks Doug Aldrich’s fire-breathing tube head into a compact 5-watt combo
 
 
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
 
 
Orange Ed Sheeran Outlowd ES3
Guitar Amps Orange Outlowd ES3 Ed Sheeran signature amp review
 
 
MusicRadar Guitar Gear Round-up June 2026
Guitars MusicRadar’s epic guitar gear round-up: June ’26 edit, ft. EHX, PRS, Fender’s mega-launch and more
 
 
Ed Sheeran has launched a new grassroots music campaign and a signature line of busking-friendly acoustic amps.
Artists “Playing music should always be fun”: Ed Sheeran and Orange launch the “ultimate busking amp”
 
 
Latest in News
MACY'S 4th OF JULY FIREWORKS -- 2026 -- Pictured: Noah Kahan performs at the "Macy's 4th of July Fireworks" -- (Photo by: Ralph Bavaro/NBC via Getty Images)
Gigs & Festivals Singer-songwriter Noah Kahan wants nappies at gigs amid troubling rise in concertgoers defecating
 
 
Sander De Keere
Artists Sander de Keere reimagines the church organ as an 'ancient synthesizer'
 
 
Rolling Stones earbuds
Headphones Technics drops limited-edition wireless earbuds in collaboration with the Rolling Stones
 
 
U2 and Martin Garrix
Bands "We go back a long way": U2 join forces with DJ and producer Martin Garrix for new track Fireflies
 
 
Sophie Lloyd shreds on her signature Kiesel
Artists Sophie Lloyd pays tribute to the late Ozzy Osbourne with a shred cover of Black Sabbath’s Paranoid
 
 
Human brain listens to yellow headphones isolated view on blue background 3d render image
Artists One more time: It's MusicRadar's Quiz of the Week #15!
 
 

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...