Rocktron Velocity 300 150W Rack Power Amp 886830450969

Item #: 
584205005000062
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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 amp... Click To Read More About This Product

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Overview

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. In addition, the Velocity 300 has "Definition" controls to give you that little bit of edge you need to bring your playing out in the mix. It also has automatic short circuit protection, which detects problems and shuts down the amplifier before any internal damage can be done.


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.
  • Clip LEDs for each channel
Specifications
  • Output Power (Unbridged): 150 watts per channel @ 4 ohms (both channel driven), 75 watts per channel @ 8 ohms (both channels driven), 37.5 watts per channel @ 16ohms (both channels driven)
    Output Power (Bridged): 300 watts @ 8 ohms, 170 watts @ 16 ohms
    Input Sensitivity: 7.3dBu (0.335V RMS), 4W stereo for rated output at max. gain
    Maximum Input Level: 23dBu (10.95V RMS), input stage clip point
    Maximum Output Level: 35dBu (4W bridged)
    Maximum Gain: 36dB
    Noise Floor: 75dBu typical (referenced to 1 watt)
    Dynamic Range: 95dB
    Distortion (Typical): 0.1% THD
    Frequency Response: 20Hz - 20KHz, +0/-3dB
    Current Consumption: 5 amps @115VAC max. (575 watts)
    Dimensions: 19" x 1-3/4" x 9-1/2", 483mm x 44mm x 241mm
    Weight: 18 lb., 7.80kg
Warranty
MANUFACTURER'S WARRANTY
Pedals - one year warranty.
Rack gear, digital amps, MIDI Mate footcontroller - 3 year warranty.
Rampage amps - 5 year warranty.


  • Customer Reviews
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Review Snapshot

by PowerReviews
RocktronVelocity 300 150W Rack Power Amp
 
4.1

(based on 22 reviews)

Ratings Distribution

  • 5 Stars

     

    (12)

  • 4 Stars

     

    (6)

  • 3 Stars

     

    (1)

  • 2 Stars

     

    (1)

  • 1 Stars

     

    (2)

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

 

Great SS poweramp

My setup is an Fractal Audio Axe Fx preamp (check these out if you haven't!!!), SS poweramp into a Mesa 2x12 cab with V30's. I tried a QSC GX3 first...Read complete review

My setup is an Fractal Audio Axe Fx preamp (check these out if you haven't!!!), SS poweramp into a Mesa 2x12 cab with V30's. I tried a QSC GX3 first and had good results, but there was a high-end peak that I couldn't get rid of with that poweramp. Also, the amp didn't feel like a tube amp (when compared to a Mesa Dual Rectifier and Marshall Vintage Modern). The Rocktron really added helped solve both of those problems. It comes very close to feeling like a tube amp, but it is still transparent enough to not completely color the sound coming from the preamp. I would recommend this amp for someone looking to preserve their preamp's tone without losing the tube amp feel. I think a tube poweramp may feel a bit better, but you would likely color the sound a bit... which could be good or bad depending on your preferences. My particular preamp has poweramp modeling, which I leave active, so I needed an amp that didn't add too much to the sound coming from the pre. The reactance control adds a lot of warmth very quickly (mine is set to 3-4) and the definition (presence) control can get harsh if not used properly (set to ~2). It is a great guitar poweramp and reacts very much like a tube poweramp. Using a Dual Rectifier patch on my preamp and running it through the power section of a real Dual Rectifier sounds very similar to running the same patch through the Rocktron. Pair it with a nice preamp and you will be set!

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 22 customers

Displaying reviews 1-10

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(2 of 2 customers found this review helpful)

 
3.0

Rocktron Velocity 300 150W Rack Power Amp

By John

from Texas

Site Member

Comments about Rocktron Velocity 300 150W Rack Power Amp:

I have had this amp a little over a year now. Seemed to be a decent SS for the money until I was playing live and my amp shut off without warning. No hissing or popping, just dead. After inspecting the amp, the surface was hot enough to fry an egg. The internal cooling fan stopped blowing which caused the amp to over heat and shut off. I e-mailed Rocktron and they suggested I remove the lid and check the wires. After taking the lid off, I noticed one of the wires wasn't connected properly so I re-seated it on the connector. Unfortunately, that didn't solve the fan issue. Once I explained to Rocktron all the wires and fuses were in good condition they told me to check the thermistors with a heat gun. Since I don't have a heat gun, or know the location of their faulty electronics I asked if I could have the amp serviced. They sent me a link to locations not local to me. I gave this amp 3 stars only because I liked it when it worked. Otherwise, it would only get 1 star. What I don't like as a musician is having to work on a piece of equipment that should have lasted longer than it did for known issues. -1 star Also lazy/lousy customer service representatives really grind my gears. -1 star After being in contact with Rocktron, I started searching this issue online and found this is a known issue with Rocktron amps. I understand nothing lasts forever, but this amp was the only brand new piece of equipment in my rack. Everything else in my rack was bought used and still works fine. I will be saving up for a tube power amp and see if more money gets a better quality amp. This entire ordeal has been frustrating and hope my review helps others if they decide to buy this product.

 
5.0

Using with a Kemper

By STANLEY

from MI

Site Member

Comments about Rocktron Velocity 300 150W Rack Power Amp:

I have had this for about a month and I am enjoying it thus far. Using it with an Orange 2 x 12 and Kemper unit. Easy to setup and dial in with my guitars and plenty of volume for my needs. No huge coloring of the sounds out of the Kemper with this unit.

(2 of 2 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.

(1 of 1 customers found this review helpful)

 
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.

    (1 of 1 customers found this review helpful)

     
    5.0

    Pretty awesome!

    By armandobravo4L

    from Victoria, Texas.

    About Me Professional Musician

    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!

    (6 of 6 customers found this review helpful)

     
    1.0

    Pretty Disappointing, all in all

    By MrKnobs

    from Austin TX

    About Me Professional Musician

    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.

     
    5.0

    Amazing

    By Erik C.

    from Bridgeport, Alabama

    About Me Professional Musician

    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.

      (5 of 5 customers found this review helpful)

       
      5.0

      Great choice if you need a Power Amp!!

      By RL

      from Westchester, NY

      About Me Experienced

      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.

        (1 of 4 customers found this review helpful)

         
        4.0

        Velocity 300 very loud !

        By Svarshik X-MachinE

        from Georgia

        About Me Experienced

        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.

          (2 of 2 customers found this review helpful)

           
          5.0

          It Works

          By Cameron Pierre

          from London

          Comments about Rocktron Velocity 300 150W Rack Power Amp:

          My Digitech GSP 1101 has finally come alive after experimenting with different speaker setups for years I finally took the plunge. Up to this point I had been using a Tubeworks MosValve MV 962 power amp which is a fantastic amplifier in itself, but always felt that something was missing. Enter the Velocity 300. It actually does everything it says on the tin. I am running it into a pair of 1 x 12 cabs loaded with EVs. Rocktron's unique "Speaker Reactance Simulation" circuitry makes a huge difference to the overall sound of the power amp. So far I have gigged it with no problems for 8 months and loving it.

          Displaying reviews 1-10

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