Directed Electronics TD2200, 225A Specification s, N t i n u o u s O u t p u t P o w e r

The TD2200PRO and TD225A amplifiers represent a radical new approach to mobile audio. All voltage gain stages are completely vacuum tube-10 tubes in all! Other than the output devices themselves, there are no solid state devices in the audio path. Specific types of Svetlana tubes were chosen for their application in the audio section. 6N1P tubes were chosen for their high gain. 6SN7 tubes are ideal as cathode followers at the output of the preamp increasing current capability. 6L6GC tubes provide the high current and power used to drive the solid state output stage. In the coupling stages only audiophile quality polypropylene capacitors are employed. The input connections of the amplifiers include balanced Mini-DIN and Gold plated RCAs. The amplifiers also have the ability to accept high voltage inputs with the aid of a built in 12dB attenuator and be operated in a “Mixed Mono/ Stereo Mode”.

The TD225A features increased bias in the output stage providing true “Class A” operation. The high voltages available from the gain stages ensure the highest possible linearity in the output signal. Fully regulated adaptive MosFET power supplies are used to provide the necessary voltages and current. The power supply circuits are optimized to limit the substantial heat generated by Class A operation. Class A amplifier designs are regarded by most high end home audio companies as the benchmark for sound quality.

S p e c i f i c a t i o n s

Power Bandwidth:	5 Hz -50 KHz
Total Harmonic Distortion:	0.2% or less (A-weighted)
Input Topology:	Balanced Differential
Input Sensitivity:	500mV - 12 volts RMS
Input Impedance:	10K Ohms
Output Impedance:	2 - 16 Ohms, bridged 4 - 32 Ohms

C o n t i n u o u s O u t p u t P o w e r

TD2200PRO	TD225A
200 WRMS x 2 @ 4 Ohms / channel	25 WRMS x 2 @ 4 Ohms / channel
400 WRMS x 2 @ 2 Ohms / channel	50 WRMS x 2 @ 2 Ohms / channel
800 WRMS x 1 @ 4 Ohms / channel	100 WRMS x 1 @ 4 Ohms / channel

D i m e n s i o n s

TD2200PRO	TD225A
Length = 33.4	Length = 33.4”
Height = 3.2”	Height = 3.2”
Width = 9.25”	Width = 9.25”
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