VTL MB-125 Monoblock Valve Power Amplifiers

Monoblocks offer ultimate channel separation, and can be placed closer to the loudspeakers for minimal current loss through the loudspeaker cables, and minimal interference between power amplifier and source components.

Fast, musical sound in a space-saving chassis: The VTL MB-125 Compact monoblocks have our smallest compact chassis and main power supply, with power output of 125 watts per channel. They are designed with the first time tube user in mind, and offer an easy transition to the joys of tube equipment ownership for the music lover and beginning audiophile, as well as for the home theater aficionado.

VTL Tetrode-Triode Switching Capability

The VTL range of power amplifiers offer a unique feature that makes them even more flexible: On-the-spot switching between tetrode and triode modes of operation that is easy to reach and user switchable.

At lower volume levels, and with efficient speakers, the sound of the triode mode offers a level of delicacy, liquidity, and sweetness to vocals, chamber and jazz instrumental quartets and solo instruments with 3-D imaging in the mid-range that will get you even closer to the real event.

Tetrode mode offers the detail, soundstage width and depth, and weight to the music that on large-scale orchestral or big band will transport you to the concert hall with all the visceral power and detail rendition of your favorite music.

A changeover switch is provided on the back of the VTL amplifiers to make changing between the two modes a breeze - just power down the amplifiers, flip the switch to the desired mode, and power the amplifiers up again.

Specifications

Vacuum Tube Complement 4 x EL34, 2 x 12AT7
Output Power 20 Hz – 25 kHz ± 0.1dB < 3% THD (Stable to 2W) into 4W Tetrode = 130 watts Triode = 65 watts into 8W Tetrode = 100 watts Triode = 55 watts
Small signal frequency response (< 0.2% THD @ 1W) 1 - 75 kHz -3dB
Class of output operation: AB1
Inputs / Outputs Single-ended RCA / 1 pair 5 way binding posts
Input Sensitivity / Impedance: 0.75 V / 145KW
Output Impedance 1.6W Power Consumption Idle = 180W Full Power = 575W