Vtl (Vacuum Tube Logic) TL 2.5i
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Model name
TL 2.5i Performance
Analog inputs (balanced)
N/A
Analog inputs (single-ended)
8
Analog outputs (balanced)
N/A
Analog outputs (single-ended)
2
Gain (dBu)
8dB or 14dB
Input sensitivity (mV)
N/A
Output voltage (V)
30
Input impedance (balanced) (Ω)
N/A
Input impedance (single-ended) (Ω)
50 000
Output impedance (balanced) (Ω)
N/A
Output impedance (single-ended) (Ω)
200
Maximum output level (balanced) (dBu)
N/A
Maximum output level (single-ended) (dBu)
N/A
Volume control range (dBu)
N/A
Frequency response low +/- 3dB (Hz)
20
Frequency response high +/- 3dB (Hz)
20 000
Signal to Noise Ratio (SNR, unweighted) (dB)
90
Total Harmonic Distortion + Noise (THD+N) (%)
< 0.02
Dimensions (mm)
483 x 381 x 102
Weight (kg)
11.34
Official link
The new model has incorporated numerous technological advances, while retaining the best elements of the TL-7.5 platform. The proven advantages of the original system architecture include: a fully balanced differential design; a hybrid circuit that combines tubes in a gain stage to provide voltage linearity (less than 2 dB NFB) with a MOSFET buffer for greater current throughput; a high-resolution volume control; and a clean box/dirty box architecture with multiple precision controlled power supplies.
The VTL TL 6.5 Series II Signature uses a fully discrete balanced circuit, a FET buffer in combination with lamps (2 x 12AU7/ECC82), an ultra-precise volume control (95 steps, 70 dB) and a brand new power supply.
The VTL TL 5.5 Series II preamp is a modified version of this model, which uses a number of innovative solutions that have been applied in the company's top TL-7 preamp.5. In the new version of the preamp, the developers have retained such key qualities as the fully tube design, the ability to install an optional phonoscade, as well as a unique sound reproduction concept.