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Ampeg Micro VR head kills V4B

Discussion in 'Amps and Cabs [BG]' started by Sparky Mark, Sep 21, 2017.

  1. So I've just had another rehearsal in a studio that has a V4B with SVT810AV as backline. I'm not sure if there's something wrong with the V4B but it just lacks any presence with my CS 61J. So I took my Micro VR head and sat it on the 810. I had to back the bass control off a little as there was too much low end but the sound was huge and classic Ampeg. Previously I've only used my micro VR at home with my SVT210AV but with the 810 it totally killed the lacklustre V4B. Apparently the micro VR puts out 260 watts into a 4 ohm cab. The volume and tone from this combination is a revelation to me.
    Son of Wobble and Stumbo like this.
  2. Those little buggars really crank it!
    I saw a guy playing one in to the matching cab in a music store other day.
    Man that puppy was loud. I can only imaginatify it into a 'fridge.
  3. JimmyM


    Apr 11, 2005
    Apopka, FL
    Endorsing: Yamaha, Ampeg, Line 6, EMG
    The Micro VR is a kickass little amp but I'll take the V4B any day over it with any bass. There must be something wrong with it. From what time frame is it?
    todd burns, TC.65, jdubbass38 and 5 others like this.
  4. husky123

    husky123 Supporting Member Commercial User

    Jul 6, 2006
    Leesburg, VA
    Product Specialist and Artist Relations for Bergantino Audio Systems
    Whoa, I love my micro VR but it's no match for my V4B. Not saying something's wrong with yours but....you might want to get it checked out. The V4B on top of a 810 is a force of pure glass goodness to be reckoned with.
  5. Agreed there's possibly something up with the V4B but it's not obvious. All the controls are working but just sounds bland. It's not my amp BTW so I won't be shelling out for any servicing. I did notice and told the muppet on the desk that they were connecting from the head to cab with a 24" instrument lead not a speaker cable! Maybe that has damaged the head in some way?
    I think for me that 100w just isn't enough and the class AB 260w of the micro just has more clout.
  6. Or maybe. ..just maybe YOU liked the li'l VR better? ?
    jwindham and husky123 like this.
  7. jwindham


    Sep 17, 2006
    Micro VR is a pretty punchy, solid amp. Lot of energy in the high mids/treble, so not the biggest low-end cushion ever. But, for its size/power, has a very nice 'character' that records well with a nice cab.
  8. I certainly didn't notice any lack of low end from the Micro; in fact I dialled the bass back to 10 o'clock with the SVT810AV to tame it. Granted that when compared visually to an SVT or V4B the micro looks like a toy but when you pull the chassis out of the wooden case and look at the guts this is a 'proper' 260 watt bass amplifier. It just looks so cute that it's hard to take seriously.
    Bass Gear Magazine reviewed the micro and concluded that with the gain set high that the harmonic complexity of the sound increases, so that's how I use it, with the gain at max and set the volume control to suit. The bad news is that now I want a fridge. I'm back in the same rehearsal space in a couple of weeks so will post a photo of the micro on top of the 810 for comic effect.
  9. husky123

    husky123 Supporting Member Commercial User

    Jul 6, 2006
    Leesburg, VA
    Product Specialist and Artist Relations for Bergantino Audio Systems
    ^^^no doubt. In my post above, I’m not discounting the Micro VR at all, it surprised the heck out of me when I first got it. Like Rod mentioned, the OP may just dig that SS vibe more than the tube thang. It’s not unheard of.
    jwindham likes this.
  10. JimmyM


    Apr 11, 2005
    Apopka, FL
    Endorsing: Yamaha, Ampeg, Line 6, EMG
    I guess. Seems totally illogical to me, but I guess I don't have to understand it for it to be a real thing.

    Sparky Mark and rodl2005 like this.
  11. I do own a 300 watt all tube head that I would love to gig regularly if I had someone else to schlep it for me. I totally get the tube output thing, but this experience means that I remain sceptical of a 100 watt bass amp having sufficient output for my gigs. That equates to only 12.5 watts maximum per driver into an 810. (Even my GK MB110 bedroom combo has a 100 watt output section). I imagine a maximum of approximately 37.5 watts per 10" driver would be loud enough for most situations.
    I did try a modern V4B through an SVT212AV at a dealer a couple of years back and really liked the tone, but that was not in a band situation where I believe it's just underpowered for me. I know many others find it more than enough.
  12. Agree. .. it REALLY depends on yr volume needs. My V4B will/has driven a SVT810E just fine and currently drives my 2 Fender Bassman Pro Neo 115 cabs. ..& thru these it gets a fair bit louder, cleaner than thru the 810.
    Unless of course, I'm going mad. Possible!
    Moosehead1966 likes this.
  13. 12BitSlab

    12BitSlab Gold Supporting Member

    Nov 28, 2016
    Liberty Township
    BTW, Ampeg rates he Micro-VR as 150 Watts into 8 ohms and 200 Watts into 4 ohms. Is the amp underrated?
  14. Yes, Bass Gear Magazine did an excellent review and lab test of the Micro VR head and SVT210AV way back and measured the head at 160 watts at 8 ohms and 259 watts at 4 ohms. Tombowlus was able to email the review to me as the flipbook was no longer available.
    bassment zombie and 12BitSlab like this.
  15. 12BitSlab

    12BitSlab Gold Supporting Member

    Nov 28, 2016
    Liberty Township
  16. 20171004_142245_resized.jpg
    So I took a speaker cable to the rehearsal studio and connected the V4B correctly to the SVT810AV. When I arrived the 2 ohm V4B output was connected with a short instrument cable (again) to the cab! So with the 4 ohm output connected to the mono 4 ohm cab input I can confirm that the V4B is plenty loud enough. All of the V4B tone controls and switches worked well and gave a lot more tonal options than the Micro VR.
    The Micro VR however was louder and stayed cleaner than the V4B. During the three hour rehearsal I used the two amps equally and the uneducated ears of the guitarists thought they sounded the same. They were wrong of course but the Micro is an Ampeg head for sure. For clean settings I did prefer the slightly more defined sound of the Micro but the extra flexibility of the V4B was the main difference. Considering the abuse this particular V4B appears to be suffering at the hands of this studio it has survived admirably and joins my GAS list.
    Last edited: Oct 4, 2017
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