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VTL S200 Signature Valve Power Amp Black VTL S200 Signature Valve Power Amp Black Posted On 31.01.2023
Last Update On 31.01.2023 VTL S200 Signature Valve Power Amp Black
VTL S200 Signature Valve Power Amp Black VTL S200 Signature Valve Power Amp Black VTL S200 Signature Valve Power Amp Black VTL S200 Signature Valve Power Amp Black VTL S200 Signature Valve Power Amp Black VTL S200 Signature Valve Power Amp Black
Description Original Description is in English, other language texts are translations and can contain errors. EnglishDeutschTurkish

Condition:

Used

Weight:

60.00 KGS

Shipping:

Calculated at Checkout


Excellent. Current model with all accessories boxes and in full working order.


Retails at 16,500 K


Measuring a reasonably tidy 18.5″ x 9″ x 18″, and weighing in at a still fairly hefty 105 pounds, the S-200, as the name implies, is a 200Wpc stereo tube amp. Based on technology found in VTL’s far pricier MB-450 and MB-185 Series III Signature monoblock power amps, from which its basic design, fully balanced circuit topology, and parts selection derives.


As VTL’s head Luke Manley explained it to me, “In thinking back on our initial design spec for the S-200, and its positioning in the VTL lineup, it was primarily to offer a stereo amplifier in the Signature range, to build on the solid foundation that the ST-150 has long laid (being a core product for VTL), and to offer balanced capability, to gain fuller advantage of the fully balanced TL-5.5 Series II preamplifier.”


As of their latest incarnations, every product in the Signature range not only features fully balanced differential circuitry and zero global negative feedback, which not only ensures each amp’s stability under a wide variety of load conditions, but, according to Manley, also brings them that extra something— call it musicality—that draws us more deeply into the listening experience.


Manley expanded on the design, adding: “Generally, with zero global negative feedback, the shorter, faster negative feedback loop offers less deleterious sonic impact, and allows the use of the Damping Factor switching, which allows adjustment of the applied negative feedback in approximately 2dB steps, lowering the output impedance in approximately ½-ohm steps. Output impedance can be set to improve control of the loudspeaker loads, and to suit the listener’s taste, with increasing loudspeaker control as the Damping Factor setting is increased, with slight loss of musical flow.


“We feel that this is a better approach than using output transformer taps, as we want to utilize the whole transformer for an efficient transfer of power without the high-frequency problems that typically result from tapping, and leaving part of the output transformer secondary unterminated.”


The transformer itself is a proprietary interleaved-and-coupled balanced unit, designed for wider bandwidth (from –0dB at below 10Hz up to –1dB at 100kHz), stability, and zero ringing.


During his visit to my house, Luke and I experimented with the S-200’s three damping factor settings: low, medium, and high. Given that the Mylar diaphragms of my Magnepan 1.7s are ultra-lightweight and unusually fast, the low setting proved to be the most musically natural, with the medium and high toggles adding levels of what I perceived as over-control and tightness to the sound that were immediately obvious and distinctly less musically satisfying. That said, although I’ve not had the chance to prove my guess, it’s not much of a leap to imagine speakers with large dynamic drivers benefitting greatly from the ability to apply a tad more negative feedback to the circuit. Which is of course why it’s an important key to this amp design’s flexibility to begin with.


Manley further explained that the other differences between the Performance Series ST-150 and the Signature S-200 is that the S-200 has separate power supplies for the input and driver stages, which he says keep the image stable even under heavy load conditions and modulation at the output stage.


Furthermore, in order to ensure a constant output tube operating point, and to stabilize the critical power supplies—even under AC and main power supply fluctuations—the S-200 employs adjustable, precision-regulated bias and screen supplies, which are designed to increase tonal stability and overall sonic integrity, most especially under complex dynamic signal conditions.


Manley and his team have also done a most welcome job of making the S-200 relatively idiot-proof for listeners—ahem, like me—who may want to enjoy the sound of vacuum tubes without having to geek-out or otherwise futz around with them.


No doubt, some traditional tube-ophiles will balk at the S-200’s auto-bias feature, which may add another layer to the circuit, and hence, some slight sonic compromise. Frankly, I can live with that (though you may not wish to). Because until the day when I have a lot more time on my hands, I prefer to listen to my gear rather than tinker with tubes or otherwise babysit the damn things.


After many hours of back-and-forth listening comparisons, I decided to (mostly) leave the S-200 in tetrode operation. But, as you see, it’s a fine thing that VTL gives listeners this option either to assess which we prefer—again, your system will certainly have its own effect on your choice—and/or which moods we may opt for.


Even though my general recommendation would be triode for chamber music and small jazz ensembles (or hard/bright recordings), for a better depth of soundstage; and tetrode for large-scale, wider-dynamic, and wider-range discs that are well recorded—we often won’t know until we sample both.


One interesting example was my well-worn copy of Milstein playing Bach’s Sonatas and Partitas for violin [DG]. Here, although I thought I would prefer triode operation, Milstein’s fiddle came across as muffled and rhythmically plodding, less immediate and immersive. Whereas in tetrode there was far more upper-end air, a keener sense of bow on strings, lilt and momentum to his playing, and a conveyance of the instrument’s whiskey-warm sound.


Beyond its outstanding sound and sonic flexibility, I’m highly taken by this amp because it does what I firmly believe is the most important thing our gear should do, which is to present music as a cohesive and engaging whole. Or, to borrow from the German—gesamtkunstwerk, a total, all-embracing work of art.


Specs & Pricing


Power output: 200Wpc into 5 ohms (tetrode); 100Wpc into 5 ohms (triode)

Number and type of inputs: One pair single-ended RCA; one pair balanced XLR

Tube complement: 8x 6550 or KT88, 2x 12AT7, 2x 12BH7

Dimensions: 18.5″ x 9″ x 18″

Weight: 105 lbs.

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