Sebatron VMP Series Explained

Discussion in 'Preamps / Channel Strips' started by Sebatron, Nov 20, 2003.

  1. Sebatron

    Sebatron Well-Known Member

    Dec 22, 2002
    We achieve a flexible and unique texture by the result of using a mixture of topologies.
    Transformer coupled input stage to a dual triode gain stage followed by a solid – state ( not intergrated circuitry ) single rail class A output buffer.
    We feel this has significant improvements over conventional desgn , most notably because of the minimalist circuit approach … preserving gain and identity.
    Distortions and false artifacts are kept to a minimum … while colour , when it is desired , is attained by releasing the pent up gain in the first amplification block via the negative feedback conrol in the pad.This also has the benefit of lowering the input impedance of the circuit and consequently changing its frequency response.All parameters interact as does the ‘air ‘ and ‘bright’ switches when selecting different running modes via the pad.
    The structure of the circuit is such that the fundamental is always re-inforced by its next relative harmonic PROMINENTLY…..
    Consequently , the units provide more than amplification if desired ,… they provide enhancement.
    A rainbow of overtones that ring true to the natural harmonic series as laid down by The Law and Natural Order.
    As much as a major or minor scale sounds natural , this is why valve amplification has increased beneficial ( musical ) properties over its inferior counterpart , …. The intergrated circuit…..
    …and why we here at Sebatron , designed the VMP series of preamps to exploit those properties .

  2. Seb,
    I like this! Please elaborate, p4erhaps using a specific application and layman's terms to get across what you ae saying. David


    How would you rate the DMP3 or the Grace vs the Seb in overall performance & quality?
  4. Kurt Foster

    Kurt Foster Distinguished Member

    Jul 2, 2002
    77 Sunset Lane.
    That's like asking how would you compare a warthog to an ice cream cone to a wide screen TV...
    They are that different. The only thing the three have in common is they are all mic pres ... other than that they are totally different.

    DMP3, inexpensive alternitive to low quality mic pres found in small mixers.

    Grace, a clean transparent "photo realistic" type pre with no color or added artifacts. This sounds good in theory bad in practice (IMO). Good for classical and orchastral applications, yuch for rock / pop.

    Sebatron, TUBES & TRANSFORMERS, WIRES. Not much more to say. Scrump-diddely-icous!


    Yo'Kurt, quick question!
    Being a gear junkie owning mid-level gear and not
    possessing vasts amounts of money, would you rec'mend the Seb for bass and git? I'm looking for that well-rounded & defined bass tone less any artificial or unwanted sound additions and
    require only clarity on rhythm git. My flow is jazz/funk in the category of H.Hancock, J.Sample,
    AWB,TwrOfPwr, etc.!


    BTW, I have audienced Dot's "listening sessions"
    and though the musical perf's were exceptional, I would have perf'rd to know how var pre's such as the Seb translates in different genre such as jazz/funk!!

    I NEED WARMTH!!! I WANT Jazz Saxist,Ronnie Laws and his band, WARMTH!!!

    Thx man!!
  7. Kurt Foster

    Kurt Foster Distinguished Member

    Jul 2, 2002
    77 Sunset Lane.
    I sure would.. The vmp is great on bass and the di is one of the best sounding directs for electric guitar I have ever used.. it remindes me of an old Fender Tweed Deluxe.. the vmp is also wonderful with a LD condenser on acoustic guitar and vocals.
  8. Tim Farrant

    Tim Farrant Active Member

    Feb 28, 2002
    New Zealand
    Home Page:
    I'm sorry, but IMHO this is rubbish. Certain intergated circuits, or more specfically operational amplifiers, exhibit very good audio performance and can sound excellent with good circuit design. Indeed, alot of gear that has a good reputation uses ic amplifiers. The latest generation SSL analog consoles is case in point.

    It is not 100% necessary to have a "tube" in circuit to obtain "a rainbow of overtones that ring true to the natural harmonic series as laid down by The Law and Natural Order."

  9. Sebatron

    Sebatron Well-Known Member

    Dec 22, 2002
    I'm sorry you have misinterpreted my post.
    You have taken it on simplistically.

    I wasn't talking about AUDIO performance ,
    I was talking about MUSICAL performance...
    Is that alien to you in electronics?

    Ah Yes So true!
    Anything with a good reputation MUST be goode.

    ...OK is that what i said?
    ..100% necessary...?

    ... more like ... " a rainbow of overtones that ring true to the harmonic series .... "

    Do intergrated circuits ring overtones on the octave?... fifth above that...? .... third ( major ) above that...?

    Or do they ring on the SEVENTH ... a natural interval for harmony?
    I don't hear birds sing on the seventh.

    I don't dislike circuitry that uses I.C ...
    ..and in spec they can outperform many aspects of classic valve design...

    ...but i don't think they vibrate like valves do.


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