The VTL Signature Output Transformer
The Ultra-Wide Bandwidth, Low-Loss Output Transformer
VTL continues a tradition of emphasis on simple elegance
and design innovation with our high fidelity, ultra wide bandwidth Signature output transformer.
Multiple tight layering and coupling for extended frequency response
Custom winding for clean square wave response, precise impedance matching
to output tubes
High efficiency with low insertion loss for optimal current transfer, set
for 5 ohm ideal speaker load, utilizing whole secondary
Behind the sleek new cosmetics of the VTL
Signature Monoblock Amplifiers, a revolutionary new component is added to
further improve the resolution of the amplifier. The Signature Transformer, an ultra-wide bandwidth, low loss output
transformer, now comes standard with all VTL Signature Monoblock amplifiers. The
Signature transformer's major strength is that it can deliver the current in the
bass, while at the same time maintaining the speed in the high frequencies,
dramatically improving the square wave response of the amplifier, and translating to
a far cleaner sound.
Traditional output transformers cannot match the performance of the VTL
Signature transformer. The biggest challenge with designing a big output
transformer is that it needs to be as big as possible to be able to handle the
bass current, but it gets harder and harder to keep the speed in the top end as
the size of the transformer increases. If the coupling is not watched carefully,
the capacitance and leakage inductance will roll off the high frequencies.
Technically, the design highlights of the Signature output transformer are a substantial
increase in the number of interleaved sections over VTL's previous output
transformers, dramatically improving the coupling between the primary and
secondary windings (and even the individual wires) and increasing the efficiency
(by lowering the insertion loss) of the transformer. The multiple sections and
better winding to winding coupling of the Signature transformer gives the amplifier
the capability to pass full power right out to the frequency extremes, which is
the major reason for the wider frequency response and improved resolution, particularly in the top end.
An additional feature of the Signature output transformer is that the primary
impedance of the transformer is more precisely matched to the plate impedance of
the output tubes, and with the impedance set for optimum speaker load of 5 ohms
gives the most efficient current transfer from the output tubes to the speaker
load. This allows the VTL amplifiers to better handle the fluctuations in
loudspeaker impedance and gives much more flexibility to handle a wider range of
Existing VTL equipment owners click here
for information about Signature transformer upgrade to existing VTL amplifiers.