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Ampeg SVT-4 PRO Series Bass Head   

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The Ampeg SVT-4 PRO Series Bass Head gives you lots of tonal control and lots of power. This true hybrid features a 3-tube preamp, a Mos-Fet power am...Read More

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OVERVIEW

The big gun . . . one of the industry's highest-powered bass amps!

The Ampeg SVT-4 PRO Series Bass Head gives you lots of tonal control and lots of power. This true hybrid features a 3-tube preamp, a Mos-Fet power amp that delivers 1,200W into 4 ohms, tone-shaping tools, and all the Pro features you'll ever need. For tone control you get 3 tone controls, a 5-position mid switch, a 9-band graphic, and ultralow/high boosts. It also features a defeatable optocoupler limiter, a variable 0-7:1 compressor, an internal 24dB/octave crossover, a 50Hz-1kHz crossover point, high/low balance control, tuner out/mute function, 1/4" biamp outputs, 2 balanced line outs with transformers, 2 effects loops, and 2 preamp out/power amp ins. It gives you classic SVT tone and more.

FEATURES
  • 1200 watts @ 4 Ohms (2x600W)
  • 3 x 12AX7 preamp tubes
  • 3-band EQ
  • 9-band graphic EQ 5-position mid tone control
  • Ultra low and ultra high boost switches
  • 2 balanced line outputs 2 effects loops
  • 1/4" and Neutrik Speakon outputs

SPECIFICATIONS

SVT-4 PRO Series Bass Head

  • Dimensions: 19 x 5.25 x 15.5 in.
  • Weight: 42 lbs.
Reviews
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Review Snapshot®

by PowerReviews
AmpegSVT-4 PRO Series Bass Head
 
4.6

(based on 88 reviews)

Ratings Distribution

  • 5 Stars

     

    (70)

  • 4 Stars

     

    (8)

  • 3 Stars

     

    (4)

  • 2 Stars

     

    (4)

  • 1 Stars

     

    (2)

80%

of respondents would recommend this to a friend.

Pros

  • Excellent sound (3)

Cons

No Cons

Best Uses

  • Performances (3)
    • Reviewer Profile:
    • Experienced (3)

Most Liked Positive Review

 

Amazing workhorse of an amp, w/ one glaring flaw

I have had my SVT-4 PRO for about three years now. It has gotten me through hundreds of shows, rehearsals, sessions and a national tour, playing every genre from blues rock/...Read complete review

I have had my SVT-4 PRO for about three years now. It has gotten me through hundreds of shows, rehearsals, sessions and a national tour, playing every genre from blues rock/ Americana to shoegaze to punk. I play it with several different speaker configurations, depending on the situation (SVT 4x10, Kustom 2x15, Acoustic 8x10). No matter what bass I use or what pedals I run my bass through, the SVT-4 PRO never fails me with that distinct warm-yet-punchy Ampeg sound. This amp is an absolute workhorse. While I would love to have an SVT Classic, I don't feel like lugging around an 82 pound head, and I am not at the point in my career where I can count on stagehands to set up my rig for me. At half the weight, the 4 PRO can get you the legendary SVT Classic tone with a little bit of tweaking. For tone snobs like myself, the graphic EQ is a welcome addition to the amp, allowing you to be extremely selective when dialing in your tone.

I would give this amp 5 stars, except for the one thing that everyone complains about: the balanced line out. It is terrible. I bought mine used and the line out was already having issues, which is probably why I got such a great deal on it. While most people blame it on the lackluster quality control of the newer Vietnam models, mine is one of the last St. Louis- made amps and it still has the same issues. PLEASE FIX THIS, AMPEG! It's truly the perfect bass amp, if it weren't for the line out! I have begrudgingly accepted it's flaw, and use a Darkglass MicroTubes B7K as a DI/SansAmp, and/or mic my cabs with an Audix D6.
I don't think I could ever go back to using another bass amp, as the SVT-4 PRO has all the tone and power I could ever ask for, but I wish they had a reliable balanced line out! Also, do yourself a favor and put this in a rack mounted road case ASAP. You don't want to risk damaging such a great amplifier.

VS

Most Liked Negative Review

 

svt-4pro head

If it wasn't for that monster ampeg sound I'd give it a 0 accross the board
This head definately can get any tone you want, and all the power you will need to...Read complete review

If it wasn't for that monster ampeg sound I'd give it a 0 accross the board
This head definately can get any tone you want, and all the power you will need to push it. BUT it is the most unreliable head I've owned, and I'm a true Ampeg fan. I've had several different ampeg set ups and other brands as well. But there is something that just stands out with tone of a ampeg. I bought this head 3 years ago, at first for writing and rehearsing it was awesome. Then came the first live gig and was told by a soundman that I trust that there was noise in the Balanced line out. There is no ground lift on this head. So we took it back home and played around with different hook ups, still had noise. I got a new out of the box head and had the same problem. So I bought a direct box with ground lift, recorded, did several shows and the balanced lines quit working period. This is way TOO much money to spend on bad design, this the only model ampeg I've ever had problems with Im totally disapointed the unreliability factor!
Too much money for repeated problems, even when they gave me another head
No value to working musicians to go through repeated problems

Reviewed by 88 customers

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Displaying reviews 1-10

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(2 of 2 customers found this review helpful)

 
4.0

Amazing workhorse of an amp, w/ one glaring flaw

By 

from Providence, RI

About Me Professional Musician

Pros

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

Cons

  • Line-out Is Horrible

Best Uses

  • Events
  • Home Studio
  • Performances
  • Professional Recording
  • Touring

Comments about Ampeg SVT-4 PRO Series Bass Head:

I have had my SVT-4 PRO for about three years now. It has gotten me through hundreds of shows, rehearsals, sessions and a national tour, playing every genre from blues rock/ Americana to shoegaze to punk. I play it with several different speaker configurations, depending on the situation (SVT 4x10, Kustom 2x15, Acoustic 8x10). No matter what bass I use or what pedals I run my bass through, the SVT-4 PRO never fails me with that distinct warm-yet-punchy Ampeg sound. This amp is an absolute workhorse. While I would love to have an SVT Classic, I don't feel like lugging around an 82 pound head, and I am not at the point in my career where I can count on stagehands to set up my rig for me. At half the weight, the 4 PRO can get you the legendary SVT Classic tone with a little bit of tweaking. For tone snobs like myself, the graphic EQ is a welcome addition to the amp, allowing you to be extremely selective when dialing in your tone.

I would give this amp 5 stars, except for the one thing that everyone complains about: the balanced line out. It is terrible. I bought mine used and the line out was already having issues, which is probably why I got such a great deal on it. While most people blame it on the lackluster quality control of the newer Vietnam models, mine is one of the last St. Louis- made amps and it still has the same issues. PLEASE FIX THIS, AMPEG! It's truly the perfect bass amp, if it weren't for the line out! I have begrudgingly accepted it's flaw, and use a Darkglass MicroTubes B7K as a DI/SansAmp, and/or mic my cabs with an Audix D6.
I don't think I could ever go back to using another bass amp, as the SVT-4 PRO has all the tone and power I could ever ask for, but I wish they had a reliable balanced line out! Also, do yourself a favor and put this in a rack mounted road case ASAP. You don't want to risk damaging such a great amplifier.

Comment on this review

(0 of 1 customers found this review helpful)

 
5.0

WICKED AMP

By 

from ONTARIO

About Me Professional Musician

Pros

    Cons

      Best Uses

      • Events

      Comments about Ampeg SVT-4 PRO Series Bass Head:

      ALL I CAN SAY IS..EXCELLENT JOB AMPEG.WOW THE NICE TONE THIS PRODUCES IS TOTALLY AMAZING.I HAVE THE USA ONE.NOT SURE OF THE OTHERS.I RUN 2 FENDER 810 PRO CABS OFF THIS THING WHEN PLAYING OUTSIDE GIGS.THE GREAT COMMENTS I GET FROM PEOPLE IS STAGGERING.IT NEVER LET ME DOWN.IT CAN FILL EVEN A LARGE SIZE HALL WITH BEAUTIFUL BASS JUST USING 1 8X10.THE TUBE PREAMP SECTION IS THIS AMP SOUNDS WARM ANA BEAUTIFUL.IF YOU CAN EVER AFFORD ONE I CAN ONLY SAY,,,,,BUY IT..I TRIED IT HOOKED UP TO AN AMPEG 8X10 CAB WHICH SOUNDED REAL GOOD ALSO.BUT FOR ME THE FENDER CAB PUTS OUT A REAL NICE DEEP CLEAN BASS BOTTOM END AND SPARKLING HIGHS WITH THE SVT 4PRO.

      Comment on this review

       
      4.0

      Killer tone

      By 

      from Portales, NM

      About Me Experienced

      Verified Buyer

      Pros

      • Excellent Sound
      • Good Warmth

      Cons

        Best Uses

        • Performances

        Comments about Ampeg SVT-4 PRO Series Bass Head:

        Purchased this to replace a beloved SWR SM400s. Absolutely killer tone, clean, punchy defined bottom end. More highs then I would probably ever use. Plenty of headroom. Lots of great biamping possibilities. Only problem was that my effects are all distorted running throught the effects loop and I hope that this is a defect in my unit and not a design flaw. Use the same setup on my SWR so I'm waiting on a replacement to arrive. Folks at Musician's Friend have been increadible in helping me out.

        Comment on this review

        (1 of 1 customers found this review helpful)

         
        4.0

        KIller Head

        By 

        from TWIN FALLS, ID

        About Me Experienced

        Ask me a question

        Pros

        • Excellent Sound
        • Powerful

        Cons

        • heavy

        Best Uses

        • Performances
        • Performing Live

        Comments about Ampeg SVT-4 PRO Series Bass Head:

        Before this head I have only played through all solidstate heads or combos. The tube preamp on this head kicks out warm tone untouchable by any solidstate preamp or modulator in my opinion. It also has an onboard compressor that is very useful. The bi-amp capability is great considering that I have 4/10 and 1/15 speaker enclosures. This beast has all the power I can ask for. The Ampeg SVT-4 PRO that I purchased is USA made so I am unsure about the quality of the Vietnam made amps.

        Comment on this review

        (3 of 5 customers found this review helpful)

         
        2.0

        Good Amp...When it works

        By 

        from Undisclosed

        About Me Experienced

        Ask me a question

        Pros

          Cons

            Best Uses

              Comments about Ampeg SVT-4 PRO Series Bass Head:

              I love the tone. I can basically get any tone i want out of the amp. I love how loud and punchy it can get, I really come through with my loud drummer and awesome lead guitarist. But this amp has SERIOUS grounding issues. Some places i can take it and it's just fine. Other places I take it and i can't even play it without the amp cutting out. I've done everything I could possibly think of without replacing the amp itself. I bought it and power amp b was already dead. Not too thrilled with this amp.. per the title, it's great!...when it works right.

              Comment on this review

              (3 of 4 customers found this review helpful)

               
              5.0

              SVT4

              By 

              from Los Angeles

              Comments about Ampeg SVT-4 PRO Series Bass Head:

              OK, first of all, this head is a mindless monster. You have to know what your doing in order to get your Tone! The Bi-Amping capabities are fantastic. But you have to make sure your doing everyting right. This thing goes down to 900 watts per channel x 2 at 2 OHMS! But if you bridge it below 4 ohms you'll blow it up. This thing will blow the paper off the speakers of a 8x10 if you let it.
              You can get the tone of a all tube SVT or any of the big power house heads of our day- Eden, GK, Fender, SWR.....But this head has a Darkside. It has Endless POWER. If your in a garage band, move along to something else.... but if your in a big time situation, this head is the end. The Answer to all things Bass. Mine is a Vietnam made. I have run it a full bore and it has not failed me yet.
              I can see how if you dont hook up the speakers the right way it will blow up. You have to make sure your Ohms to wattage is correct. You have to make sure your buttons are set right or you'll lose tone. All in all, i havent heard a better sounding amp, or id buy it.

              Comment on this review

              (4 of 10 customers found this review helpful)

               
              1.0

              great amp!

              By 

              from Undisclosed

              Comments about Ampeg SVT-4 PRO Series Bass Head:

              Where do i start??? If anybody has a proplem with this amp is probobly becaue your not hooking it up correcty. Gotta make sure you have the buttons all pushed in right. This is a complicated amp!! Make sure all your cabinets hook up right to wattage to oms. you dig?? This Amp rocks man. More power than you can ever need. TONE! The 3 12zxy's give you way more tone than you can imagine. The only complaint is you cant ovedrive this monster, but thats ok, just get a ovedrive unit.
              I have a usa made and a veitnam made and they both rock. no difference. i use to own the all tube heads.... im 50 years old... cant handle the weight! if the SVT is a 10 then the SVT-4 is a 9.5.

              Comment on this review

              (5 of 6 customers found this review helpful)

               
              3.0

              svt-4pro head

              By 

              from Detroit, Mi

              Comments about Ampeg SVT-4 PRO Series Bass Head:

              If it wasn't for that monster ampeg sound I'd give it a 0 accross the board
              This head definately can get any tone you want, and all the power you will need to push it. BUT it is the most unreliable head I've owned, and I'm a true Ampeg fan. I've had several different ampeg set ups and other brands as well. But there is something that just stands out with tone of a ampeg. I bought this head 3 years ago, at first for writing and rehearsing it was awesome. Then came the first live gig and was told by a soundman that I trust that there was noise in the Balanced line out. There is no ground lift on this head. So we took it back home and played around with different hook ups, still had noise. I got a new out of the box head and had the same problem. So I bought a direct box with ground lift, recorded, did several shows and the balanced lines quit working period. This is way TOO much money to spend on bad design, this the only model ampeg I've ever had problems with Im totally disapointed the unreliability factor!
              Too much money for repeated problems, even when they gave me another head
              No value to working musicians to go through repeated problems

              Comment on this review

              (5 of 7 customers found this review helpful)

               
              1.0

              Great Sound, Terrible Quality

              By 

              from Nashville

              Comments about Ampeg SVT-4 PRO Series Bass Head:

              Go buy another head or find an old USA made ampeg. The old USA made amps do live up to their name. If you want better quality and better sound for a cheaper price go find a Demeter pre amp and a power amp that fits your needs.
              This is one of my favorite sounding heads that I have ever used as far as pure sound goes. The problem is that ever since ampeg moved their factory to Vietnam, the quality has dropped. I have owned this head for about a year now and it has been in the shop about 5 times now for various reasons. I play about 200 gigs a year and cannot trust this head for any of them. The sound cuts in and out, there are mute switch problems as well as other problems. These heads are way too expensive to have this many problems. I have had multiple other friends that all got rid of theirs because of the same problems. A friend of mine is a manager at guitar center and does some ordering for them. He told me that ampeg sends them duds all the time and they have to send them back until they finally get an amp that works properly.
              I've lost all respect for this company. They have poor support and terrible products. They know that their quality has gone way down but they charge more than they did before.
              Mine has gone out countless times. I know others that have had the same problem and all gotten rid of them. If you want great sound from an amp that you can't ever count on, this is the amp for you.
              If these amps could produce the sound that they do reliably, this would be a perfect score. But they don't.

              Comment on this review

              (1 of 1 customers found this review helpful)

               
              5.0

              Stop Looking and buy this

              By 

              from Chicago Area

              Comments about Ampeg SVT-4 PRO Series Bass Head:

              Sound, volume, mix cut, best of all contemporary amps. You won't get this sound from any "lightweight"
              I spent months going from store to store trying everything available today that would replace
              The Acoustic 360 I had in the 70's. Everything was a disappointment until I plugged into the SVT4.

              Its clarity and tonal range are far better than all other amps available today. I was using an SVT410 HLF and felt it was a little lacking in the bottom so I added a SVT115..and perfection!

              If you have the money, this one will do it all, any venue with the possible exception of a baseball stadium. The tone you crave lives here.
              Good Quality throughout. Solidly made pro gear
              High priced....what things "top of the line" aren't?

              Comment on this review

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