Trilogy 993 Hybrid Stereo Power Amplifier

The 993 showcases Trilogy's mastery of all audio technologies. The best design choices can only be achieved by understanding all the options. Trilogy is in a unique position to do this; combining the best of both solid state and valve technology to produce a remarkable design that is capable of sublime musical subtlety and impressive power.

Standard finish is a soft, finely textured natural silver. You can also choose one of our lustrous paint finishes at extra cost, or take advantage of the Chameleon Colour System which opens up a whole new dimension of possibilities.

Technical Details:

All the 993's voltage gain is provided by a 6H6П super tube. This Russian military triode has been selected for exceptional performance at audio frequencies, having both high transconductance and low mu. The valve operates in Class A in a grounded grid configuration with zero negative feedback for maximum fidelity.

Power supplies for the driver stage are fully discrete and shunt regulated for excellent transient response. The valve has an easy load, only driving the input of the output stage. This enables it to deliver the musical flow and micro detail that makes valves so special.

The 993 takes the unusual step of specifying a choke input power supply for the output stage. The choke is nearly as large as the power transformer and plays a crucial role in the amplifier's performance. The electrically noisy, high current spikes that are pulled from the mains in conventional supplies are avoided. The addition of a choke allows a much more linear current draw instead, keeping dynamic noise under drive much lower. Premium reservoir capacitors and soft recovery diodes complete the power supply.

The first watt delivered by an amplifier is the most crucial. It is where the majority of tonal and spatial cues reside at normal listening levels. The 993's output stage uses a small and agile output FET to serve this region, giving superior performance where it has most impact. When current demand rises, higher power bipolar devices supply additional current to move the loudspeaker with ease. The amplifier has zero global negative feedback, but because of high bias, still exhibits a low output impedance.

As with all Trilogy products great care has been taken with physical construction. The custom heat sink is milled from a solid billet of aluminium. The substantial mass has high thermal inertia, allowing the directly mounted output devices to operate at a constant temperature, free from the severe mechanical resonances of conventional extruded heat sinks.

Trilogy specifies quality parts throughout to ensure the 993 gives a lifetime of reliable performance. From precision resistors from Welwyn, custom capacitors and magnetics to Mundorf solid copper binding posts, used to eliminate the audible mechanical resonance of more common brass. Every construction detail has been carefully considered.

TAS link connectivity provides functions such as remote switch on, remote status monitoring through the system controller, and security bonding. QuietBus technology ensures the integral housekeeping microcontroller's high speed lines are completely inactive during normal operation. This keeps the audio circuits completely free from digital processing interference whilst protecting the amplifier at all times.

Specifications
 Size  465*346*106 (W*D*H)
 Size including connectors  465*378*106 (W*D*H)
 Packaged Size  590*510*250 (W*D*H)
 Weight  19 Kg
 Packaged Weight  22 Kg
 Standby Power Consumption  < 1 Watt
 Idle Power consumption  50 Watts
 Maximum Power consumption  700 Watts
 Inputs  1 pair RCA phono sockets
 Input impedance  400K Ohms
 Input sensitivity  2.0V RMS for Rated output
 Rated Power (8 Ohms)  125 Watts per channel
 Rated Power (4 Ohms)  200 Watts per channel
 Recommended load impedance  4-16 Ohms
 Frequency response  5Hz-30KHz +/- 0.5dB
 Distortion  Less than 1% A weighted at rated output
 Phase  Phase correct (non inverting)