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Rocktron Velocity 300 150W Rack Power Amp  

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Product #584205

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  • Rocktron

    It really can sound and feel just like a tube amp.

    The Rocktron Velocity 300 Rack Power Amp was designed in a joint effort between Rocktron and integrated circuitry design engineer Derek Bowers. The Velocity 300 is the first commercially available amplifier to be based on current-feedback technology. This technology provides extremely high-speed, wide-bandwidth amplification. The bandwidth of the power amp section is considerably higher than typical amplifiers based on voltage feedback designs therefore providing much more punch and definition than previous designs have allowed for.

    Another of the Rocktron Velocity 300 power amp's innovative features lies in the reactance simulation circuitry (controlled by the front panel "Reactance" control. At the minimum setting of the reactance control, the Velocity 300 will provide the added punch and improved transient response of the high-speed current-feedback design. As this control is turned up, the Velocity 300 will begin to simulate the interaction that takes place between the tube amplifier and the guitar speaker cabinet.

    In addition to the high-speed current-feedback design, the Velocity 300 also incorporates Rocktron's unique "Speaker Reactance Simulation" circuitry. This concept is unprecedented in a solid-state amplifier and yields the much-sought-after sound of the most impressive tube amplifiers without the added maintenance and cost and weight of a tube amp.

    While other amplifier manufacturers seem to concentrate solely on the harmonic characteristics of the tube itself (and how to recreate them in a solid state circuit), Rocktron suggests it still lacks the tube sound. When put to the test and compared directly with the most popular tube amps, these solid state designs still sound cold and thin.

    At the maximum setting of the reactance control, the Velocity 300 will instead sound like a tube amplifier, simulating the interaction between a tube amplifier and a guitar speaker cabinet. The resulting sound is much warmer and fatter, and when compared directly with a tube amp, is virtually indistinguishable.

    Features

    • Up to 150 watts per channel stereo, up to 300 watts mono bridged
    • Easily accessible individual line fuses protect the unit's output devices from failure under extreme conditions
    • Thermostatically controlled cooling system ensures that the internal fan will only turn on when the unit reaches a certain temperature.
    • Silent on/off switching
    • Protective "Overload" circuit automatically shuts the unit down when plugged into an AC wall outlet providing excessively high line voltage.

    Order today and get that expensive tube amp sound at a fraction of the cost.

     

    Velocity 300 150W Rack Power Amp Specifications:

    • Output power: (unabridged) 150 watts at 4 Ohms (per channel), 100 watts at 8 Ohms (per channel), 60 watts at 16 Ohms (per channel); (abridged) 300 watts at 8 Ohms (mono), 200 watts at 16 Ohms (mono)
    • Maximum input level: +22.5dBu
    • Maximum output level: +31.7dBu
    • Maximum gain: 40dB
    • Noise floor (typical): +66dBu (A-weighted)
    • Dynamic range (typical): 98dBu (A-weighted)
    • Distortion (typical): 16 Ohm .025%, 8 Ohm .035%, 4 Ohm .065%; (bridged) 16 Ohm .035%, 8 Ohm .045%
    • Frequency response: ± dB (20Hz to 20kHz)
    • Dumping factor: 70 (at 8 Ohm)
    • Input sensitivity: .3V RMS (at 8 Ohm to rated output)
    • Current consumption: 450 watts (at 120 VAC)
    • Overvoltage trip points: 100 volts trips at 116 volts, 120 volts trips at 139 volts, 220 volts trips at 260 volts, 240 volts trips at 282 volts
    Customer Reviews
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    Review Snapshot®

    by PowerReviews
    RocktronVelocity 300 150W Rack Power Amp
     
    4.4

    (based on 12 reviews)

    Ratings Distribution

    • 5 Stars

       

      (8)

    • 4 Stars

       

      (3)

    • 3 Stars

       

      (0)

    • 2 Stars

       

      (0)

    • 1 Stars

       

      (1)

    89%

    of respondents would recommend this to a friend.

    Pros

    • Easy to use (8)
    • Good power output (8)
    • Excellent sound (5)
    • Portable (4)
    • Warm / comfy (4)

    Cons

    • Heavy / bulky (3)

    Best Uses

    • Performances (7)
    • Amateur recording (3)
    • Home studio (3)
    • Outdoor events / games (3)
    • Professional recording (3)
      • Reviewer Profile:
      • Experienced (5), Professional musician (4)

    Most Liked Positive Review

     

    CLEAR TONE, LOW NOISE AND LOUD!!!!!!!!

    I just picked this amp up to combine with my Rocktron Prophesy ii. If you are looking to build a nice rack and save space you found it!! Why? Its clean with alot...Read complete review

    I just picked this amp up to combine with my Rocktron Prophesy ii. If you are looking to build a nice rack and save space you found it!! Why? Its clean with alot POWER which equals headroom!! This amp is loud, and I run it in stereo at 75 watts per channel 8 ohms into a Marshall 1960a LEAD cab (same as JCM 800) Any more need to push through a PA or over a loud drummer you can run it in mono bridged 300 watts which you should have no issue punching through until the need of a cab mic. Solid state tone can be tricky to punch through a mix. If you combine this with the right cab and amp pre you can attain an amazing amount of crunch. I punched this up to max and had BALLS of bass and crunch no breakup with my Marshall 1960a. Chest pounding bass. The Prophesy sounds amazing with vibrant highs and mids and the effects glisten with even transparency. I would recommend this to anyone wanting to combine it with an effects preamp such as the AXE FX, Rocktrons, or a POD. With the volume all the way up, I do get some slight hum which is expected with any amp punched to its threshold. With a tube head at 10, the noise would be unbearable. The ?Reactance? control on this amp is an extremely beneficial feature. That feature alone will divide your tone from any other amp of this kind. It will crank the low end and make your tone really warm. I am amazed at how well this works to give a ?tube feel? as Rocktron claims. The definition control works much like a presence control and also is an excellent tone defining feature in that it opens up your sound allowing it to expand. I love the fact that I can shred through this amp and feel all my notes. Much more then I expected in the price of this monster!!!!!!!

    VS

    Most Liked Negative Review

     

    Pretty Disappointing, all in all

    Anyone who wants a lot of tight, clean headroom with uncolored sound won't find it here. I wanted to use it with a floor modeler (Roland VG-88) and I compared it head...Read complete review

    Anyone who wants a lot of tight, clean headroom with uncolored sound won't find it here. I wanted to use it with a floor modeler (Roland VG-88) and I compared it head to head with an old Digitech MosFet guitar power amp. The MosFet beat it in every way other than being two rack spaces instead of one. There are two controls on this unit labeled "Definition" and "Reactance." The knobs should say "Harshness" and "Mud," because they're simply tone controls with poorly chosen center frequencies. Even so, I could live with the Reactance and Definition slightly turned up except for the fact that no matter where the controls are set this amp SAGS like an old tube amp with a tube rectifier, i.e. like it doesn't have enough headroom or slew rate to reproduce the transient attacks. There's no punch to it, no sparkle, no solid bottom, just compressed mushiness. MAYBE this amp would be good for heavily overdriven metal or something where you want a lot of compression and low end mush from the amp but I need punch and crisp and this aint it.

    Reviewed by 12 customers

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    (1 of 1 customers found this review helpful)

     
    4.0

    Good Loud Unit AMAZING customer service!

    By Beckettbrown

    from Hainesport, NJ

    About Me Professional Musician

    Pros

    • Easy To Use
    • Powerful

    Cons

    • heavy

    Best Uses

    • Performances

    Comments about Rocktron Velocity 300 150W Rack Power Amp:

    Had this unit for 3-4 months before it randomly started smoking 15 mins into a practice session and then shut down. Up until that point I loved the thing. Its only bad part is it was so heavy it adds about 10 lbs to the rack. The good thing here is I emailed rocktron and with no hassle at all they are sending me a new one in the mail.

    Comment on this review

     
    4.0

    Nice unit

    By Sean Mimms

    from Sinn City

    About Me Experienced

    Pros

    • Easy To Use
    • Powerful

    Cons

    • It Is Not Transparent

    Best Uses

      Comments about Rocktron Velocity 300 150W Rack Power Amp:

      This unit is not as heavy as you are led to believe, however it does do a lot of the negative things I have read in reviews- including sounding thin- because the amp is not transparent to your processor. I have found that you have to tweak your settings to get the types of tones out of it that you once had. If you have the reactance and definition turned all the way up it starts to sound decent, this is your starting point for adjusting of your processor setting. With the reactance and definition turned down it sounds horrible.

      This unit seams to sound better the more you turn it up. It has plenty of head room.
      If does not sound like a tube amp, however it sounds very similar and with some patience and adjustments to your processor I'm positive you can get it extremely close to sounding identical. I'm still working with it to get things just right, but it is coming together nicely with some patience.

      Comment on this review

       
      5.0

      Pretty awesome!

      By armandobravo4L

      from Victoria, Texas.

      About Me Professional Musician

      Ask me a question

      Verified Reviewer

      Pros

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

      Cons

      • heavy

      Best Uses

      • Amateur Recording
      • Events
      • Mobile DJ
      • Performances
      • Professional Recording

      Comments about Rocktron Velocity 300 150W Rack Power Amp:

      This thing is great! It gets pretty loud and can handle just about anything you throw at it! It is super tough, and it's pretty heavy, but definitely worth having! I use this for my PODHD Pro, and I love it! It is so perfect! It is really easy to hook up and works really well. I definitely think that this is the way to go if you need a power amp for your rig!

      Comment on this review

      (5 of 5 customers found this review helpful)

       
      1.0

      Pretty Disappointing, all in all

      By MrKnobs

      from Austin TX

      About Me Professional Musician

      Ask me a question

      Pros

      • 1 Rack Space
      • Sturdy Construction

      Cons

      • Poor Sound Quality
      • Saggy
      • Very Heavy
      • Weak

      Best Uses

      • None

      Comments about Rocktron Velocity 300 150W Rack Power Amp:

      Anyone who wants a lot of tight, clean headroom with uncolored sound won't find it here. I wanted to use it with a floor modeler (Roland VG-88) and I compared it head to head with an old Digitech MosFet guitar power amp. The MosFet beat it in every way other than being two rack spaces instead of one. There are two controls on this unit labeled "Definition" and "Reactance." The knobs should say "Harshness" and "Mud," because they're simply tone controls with poorly chosen center frequencies. Even so, I could live with the Reactance and Definition slightly turned up except for the fact that no matter where the controls are set this amp SAGS like an old tube amp with a tube rectifier, i.e. like it doesn't have enough headroom or slew rate to reproduce the transient attacks. There's no punch to it, no sparkle, no solid bottom, just compressed mushiness. MAYBE this amp would be good for heavily overdriven metal or something where you want a lot of compression and low end mush from the amp but I need punch and crisp and this aint it.

      Comment on this review

       
      5.0

      Amazing

      By Erik C.

      from Bridgeport, Alabama

      About Me Professional Musician

      Ask me a question

      Pros

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

      Cons

        Best Uses

        • Amateur Recording
        • Events
        • Home Studio
        • Performances
        • Professional Recording

        Comments about Rocktron Velocity 300 150W Rack Power Amp:

        I got this a few months back and it is amazing. It's a little on the heavy side but not too bad. It cuts through a band mix which good. I can't really think of any thing that I don't like about it.

        Comment on this review

        (3 of 3 customers found this review helpful)

         
        5.0

        Great choice if you need a Power Amp!!

        By RL

        from Westchester, NY

        About Me Experienced

        Ask me a question

        Pros

        • Easy To Use
        • Excellent Sound
        • Good Warmth
        • Portable
        • Powerful
        • Solid State Reliable

        Cons

          Best Uses

          • Amateur Recording
          • Home Studio
          • Performances
          • Professional Recording

          Comments about Rocktron Velocity 300 150W Rack Power Amp:

          I purchased this to go with my new Eleven Rack. I have been playing for 20 years. I own several tube amps. This unit sounds great and the controls actually work. I was surprised how heavy it was but that is not an issue. It seems well built and should hold up to most abuse. This would be a great addition for the gigging guy because its solid state, so no worries about tubes going etc.

          Comment on this review

          (1 of 4 customers found this review helpful)

           
          4.0

          Velocity 300 very loud !

          By Svarshik X-MachinE

          from Georgia

          About Me Experienced

          Ask me a question

          Verified Buyer

          Pros

          • Easy To Use
          • Portable
          • Powerful

          Cons

            Best Uses

            • Events
            • Home Studio
            • Mobile DJ
            • Performances

            Comments about Rocktron Velocity 300 150W Rack Power Amp:

            compact,powerfull,normal sounding.

            Comment on this review

            (4 of 4 customers found this review helpful)

             
            5.0

            Sounds like a Marshall!

            By The Diplomat

            from Ontario, Canada

            About Me Experienced

            Verified Buyer

            Pros

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

            Cons

              Best Uses

              • Performances

              Comments about Rocktron Velocity 300 150W Rack Power Amp:

              Been playing for 25 years and the velocity sounds amazing. Running a Rocktron Chameleon through it and I can get any sound I want, including those created by an expensive Marshall. I like Marshall equipment but for a fraction of the price this was a good purchase.

              Comment on this review

              (1 of 1 customers found this review helpful)

               
              5.0

              Awesome when paired with good modeler

              By metalgarth

              from stl, MO

              About Me Experienced

              Pros

              • Easy To Use
              • Excellent Sound
              • Loud
              • Powerful

              Cons

              • heavy

              Best Uses

              • Performances
              • With a good modeling unit

              Comments about Rocktron Velocity 300 150W Rack Power Amp:

              Sounds great and very tube like even at practice level volume. It is the perfect companion with a good amp modeling unit such as a Boss GT-10 or a Line 6 Pod. I use mine with a Boss GT-10 and home made Celestion 1x12 speaker cabinet. It's not as good as a full blown tube amp, but it sounds great and won't break the bank.

              Comment on this review

              (4 of 4 customers found this review helpful)

               
              5.0

              Its pulls me through the nite,Bar Band,Rehearsals,other.

              By David Rossi

              from Oregon coast

              Comments about Rocktron Velocity 300 150W Rack Power Amp:

              Perfect. I used and own Marshall Jcm 900. and Mesa Dual rack mount rectifier.Getting a little heavy. the Rocktron Velocity 300 Its tough,Light,and is a lot more consistent then my heavy tube amps .No problem getting my tone it was just as good at low levels.kept the harmonics as well.not just the same but real useable.I found it to be very useable,and for some things its better. I use a compressor racked with a Pod pro.I did have to change a few settings on the pod pro.
              Best features.I was able to get my tone out of the gate.I did have to alter my preamp a little.
              I run it hard and with a lot of bottom end. with a Mesa 800 wt. 2-15 bass cab on one side and two Mesa 150 wt. 2-12 rectified half cabs on the other .4 ohm and ohm.Really bass cab in the middle and the half cabs on both sides.kicks but in stereo that way.It takes a lot of watts.that little amp has it in spades.
              Its worth it Full five star rating.

              Comment on this review

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