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MF MD HG01 Electric Guitar Month 06-19-18

Orange Amplifiers OB1-500 500W Analog Bass Amp Head

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J20354 000000000
Product Price $899.0
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For years bassists have been combining guitar and bass amps to remarkable effect, adding harmonics and layers of overdrive from guitar amps to their ...Click To Read More About This Product

Available 07-01-2018

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Merge guitar-amp tone with bass-amp punch, all backed with 500W of thunder.

For years bassists have been combining guitar and bass amps to remarkable effect, adding harmonics and layers of overdrive from guitar amps to their core bass tone in pursuit of the ultimate live sound. This "bi-amp" trend got the Orange engineers thinking, "Why drag two amps to the show when you could take just one?" The result is the Orange OB1-500 500W rack-mountable bass head, which takes care of this and much more. There is also a 300W version, for those who don't need quite as much punch.

The key to the OB1' unique sound is Orange's 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.

"Bi-Amped" 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' Gain knob. These two elements are combined using the amplifier' 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' 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' highly responsive active three-band EQ has been meticulously voiced for maximum effect with minimal fuss. The EQ section is located after the Gain and Blend dials take effect, allowing full control over their massive sonic range. The Bass and Middle controls feature +/-15dB of boost or cut, whilst there is a range of +/- 20dB on the Treble control.

  • Power: 500W
  • Single channel
  • Controls: active/passive switch, gain, blend, 3-band EQ, volume, line output
  • Impedance: 1x8 ohm, 2x8 ohm, 1x4 ohm
  • Outputs: Speakon; 1/4" out
  • Balanced direct output
  • 2U rack-mountable size
  • Dimensions: 18.97" x 10.43" x 3.93"
  • Weight: 21 lb.

Get the best of both worlds. Order today!


Review Snapshot

by PowerReviews
Orange AmplifiersOB1-500 500W Analog Bass Amp Head

(based on 1 review)

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Reviewed by 1 customer

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(1 of 1 customers found this review helpful)


This thing is a complete beast! Get it now!

By B-money

from Port Murray, NJ

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  • Easy To Use
  • Excellent Sound
  • Good Warmth
  • Powerful


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    • Home Studio
    • Performances

    Comments about Orange Amplifiers OB1-500 500W Analog Bass Amp Head:

    This is one of the best amps I've ever owned and I have/had Marshall JCM's, Vox's, Mesa's, etc. I normally play guitar, but have been playing bass a lot in a recent project. It can do everything from a smooth, crystal clean to a heavy, dirty (yet extremely defined) fuzz. On first glance, it may seem like a very basic/novice amp due to so few knobs. However, that couldn't be further from reality. The EQ is very simple(low,mid,hi), yet highly sensitive. Then you have the Blend and Gain knobs which work in unison to create a range of tight & punchy fuzz combos. I've never been a very big fan of using much fuzz on bass(if any at all), but the OB1 has completely changed my stance on this. I rack-mounted this in a 4U Gator with a Merit power conditioner and Korg tuner and it all fit in nicely. It does have some good weight to it. I was previously using an Ampeg SVT3 with pretty much the same rack setup and it's definitely a bit heavier, but still not too bad. I paired it up with an OBC410 cabinet and that, obviously, made it sound even more insane. I've gigged out with it a few times already and used it with existing backlines ie. Ampeg 8x10, Hartke 8x10 and it still sounded great, but not quite as tight and crisp as with the OBC 4x10. So I definitely recommend pairing it with an Orange cab. Just be aware that the Orange cabs are pretty heavy, so take that into consideration if you need to transport equipment a lot. I probably could've gone with the 300w version of this amp, but didn't want to risk it as we sometimes play outdoor shows and some bigger venues. I don't think I've put the master volume past 5, except for once to see if I could shake my whole house. I live out in the woods and I think I shook my closest neighbors house, which is about a 1/4 mile away. So basically, if you're only using this at home or smaller venues, then the 300 will almost definitely be more than enough for you. First Orange amp I've owned and I'm hooked for life!

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