The result of two years of development at the highest level, the Reference 160M or REF 160M is a monophonic power stage that breaks the rules in both sound and industrial design. It includes a circuit topology in whose signal path the number of components has been minimized and their quality increased, while it can operate in both Ultralinear and Triode mode. Also the aesthetics of this exceptional amplifier constitutes a point and apart with respect to what has been done to date by the Minnesota firm in products of this level. And it is that with the REF 160M, the designers of the American firm wanted to create a new style that complemented the aesthetics of the Reference 6 preamplifier, also including a transparent front panel that allowed to see the spectacular and resplendent KT150 power tubes. In addition to showing the aforementioned valves, said window incorporates an innovative two-layer construction with elegant engravings, which create an integrated power indicator whose markings are illuminated by hidden LEDs of adjustable brightness. The REF 160M includes a sculpted canopy with a built-in fan to evacuate the heat generated by the four KT150 power valves and the two built-in 6H30 attack valves. For its part, the power regulation circuitry is based on solid state devices to increase its efficiency, stability and reliability. The result is a new reference in musicality for each parameter that defines sound quality.

Technical characteristics:

• Absolute reference tube monophonic power amplifier.

• Equipped with 4 KT150 outlet valves and 2 6H30 attack valves.

• Also compatible with 6550, KT88 and KT120 power valves.

• Transistorized regulation circuitry.

• Analog level meter recorded on the front panel.

• Automatic polarization circuit of the outlet valves.

• Possibility of selecting between Ultralinear and Triode operating modes.

• Power of 150 W RMS in Ultralinear mode and 75 W RMS in Triode mode.

• Frequency response of 5-70,000 Hz (cut-off points at -3 dB).

• Global negative feedback rate of 14 dB.

• 2 microsecond rise time.

• “Slew Rate” of 13 V / us.

• Balanced (XLR) and unbalanced (RCA) signal input.

• RS-232 input and socket for 12V trigger signal.

• Dimensions: 438x254x457 mm (W x H x D).

• Net weight: 25'5 kg.