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
  • Music Gear Reviews
  • Synths
  • Guitars
  • Controllers
  • Drums
  • Keyboards & Pianos
  • Guitar Amps
  • Software & Apps
  • More
    • Recording
    • DJ Gear
    • Acoustic Guitars
    • Bass Guitars
    • Tech
    • Tutorials
    • Reviews
    • Buying Guides
    • About us
Don't miss these
More
  • NAMM 2026: as it happened
  • Best NAMM tech gear
  • Joni's Woodstock
  • 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.

Latest in Guitar Amps
Line 6 Helix Stadium
Could the Line 6 Helix Stadium Floor be a serious rival to the Quad Cortex?
 
 
Josh Middleton takes a solo on his signature ESP / LTD electric guitar during a Sylosis live show in San Francisco, 2025.
“You can have a great amp but if the speaker sucks it won’t sound good”: Sylosis' Josh Middleton on the most important link in your signal chain
 
 
Fractal Audio ICONS; the amp modelling company debuts its first-ever plugin suite for guitarists.
Amp modelling titan Fractal Audio unveils its first guitar plugin suite
 
 
Billie Joe Armstrong performs live at Levi's Stadium during Green Day's Super Bowl LX set – and to his right are a pair of pale blue Marshall 'Dookie' signature amps.
Billie Joe Armstrong debuts new signature ‘Dookie’ Marshall amps during Super Bowl LX show
 
 
Mooer Audio F40i / F40i Li Intelligent Amp
Mooer Audio’s flagship Intelligent Amp lets you find guitar tones using AI prompts
 
 
All the best guitar gear from this year's NAMM Show
The best new guitar gear of NAMM 2026: More effects, more amps, more guitars and more tech than ever
 
 
Latest in News
MIAMI GARDENS, FLORIDA - OCTOBER 18: (EDITORIAL USE ONLY. NO STANDALONE PUBLICATION USE (NO SPECIAL INTEREST OR SINGLE ARTIST PUBLICATION USE; NO BOOK USE)) Taylor Swift performs onstage during The Eras Tour at Hard Rock Stadium on October 18, 2024 in Miami Gardens, Florida. (Photo by John Shearer/TAS24/Getty Images for TAS Rights Management)
Chris Lake said yes to a Taylor Swift remix before he'd even heard the stems - but then had to make it
 
 
Arturia's Efx Ambient from FX Collection 6, being used in a studio
Arturia's FX Collection 6 adds an ambient plugin specialising in "novel, emotive textures" and a souped-up H910
 
 
frozen
“Those fridges are probably the fourth best musical group to come out of Sheffield”: Supermarket goes viral for the chilled ambient drones of its freezer section
 
 
Paul Gilbert and Joe Satriani jam at the 2012 Marshall 50 Years of Loud Live anniversary concert
Paul Gilbert on why it can be so hard to resist the urge to shred
 
 
UJAM
“I’ll be having fun with this for a long time to come”: UJAM's Voxcraft delivers creative vocal manipulation without the menu-diving
 
 
Queen
“The single biggest leap we ever made”: Queen II to be given big reissue treatment
 
 

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
  • 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...