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
  • "The most expensive bit of drumming in history”
  • JoBo x Fuchs
  • Radiohead Daydreaming
  • Vanilla Fudge
  • 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
A Blackstar Beam Solo guitar headphone amp plugged into an electric guitar
“The modelling offers sumptuous guitar tones with plenty of variety”: Blackstar Beam Solo review
 
 
Mark Tremonti plays a big chord on his signature PRS electric guitar as he performs a 2025 live show with Creed
“If I sit down with a Dumble, the last thing I’m going to do is do any kind of fast techniques”: Mark Tremonti on why he is addicted to Dumble amps
 
 
EVH Gear Hypersonic 5150III 6L6: The new all-digital modelling combo offers the same stylings and super-hot tone as its all-tube predecessor but is 16kg lighter
EVH Gear turns “holy grail” Eddie Van Halen amp Hypersonic with super-lightweight 5150III 6L6 digital modelling combo
 
 
The Electro-Harmonix ABRAMS100 is a compact, guitar amp head with 100-watts, 3-band EQ, effects loop and bright switch, and it has a yellow control panel and black dials.
Electro-Harmonix presents 100-watts of solid-state power in a compact guitar amp head weighing just 2.5lbs
 
 
Victory The Duchess Deluxe MKII Head
Get the most out of your pedals and save £422 on one of the best pedal platform amps I've played - the Victory V40 Duchess Deluxe MKII Head
 
 
Neural DSP Quad Cortex floating with smoke in the background
“A generational leap in modelling technology”: Neural DSP gives Quad Cortex and Nano Cortex an almighty power-up
 
 
Latest in News
Chris Rea circa 1970
Tell Me There’s A Heaven: Chris Rea has died, aged 74
 
 
Lady Gaga performs during her 'JAZZ & PIANO' residency at Park MGM on August 31, 2023 in Las Vegas, Nevada
“Being a human being isn’t going to go out of style anytime soon”: Why Lady Gaga is unafraid of AI
 
 
LONDON, ENGLAND - JULY 27: (EDITORIAL USE ONLY) Alanis Morrisette performs live on stage at The O2 Arena on July 27, 2025 in London, England. (Photo by Samir Hussein/WireImage for ABA)
Alanis Morissette reveals what she thinks is “the real irony” of the fuss caused by the lyrics in her 1996 hit
 
 
 Morrissey performs at The SSE Arena, Wembley on March 14, 2020 in London, England
Back To The Old House: Morrissey signs again to Warners subsidiary Sire
 
 
Artist Paul Simon arrives for the Polar Music Prize at Konserthuset on August 28, 2012 in Stockholm, Sweden
“One of music’s great storytellers”: Paul Simon among artists to be given Lifetime Achievement award at 2026 Grammys
 
 
The Beatles
This deep dive into a classic Beatles song reveals 4 synth parts that we’d never even noticed before
 
 

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...