Class A100 D3

XTZ Class A100 D3 is made from highly stable aluminum, more inputs, modular construction and separately shielded sections. This popular amplifier is probably the best amplifier on the market in its price range. Class A100 D3 is a unique amp, with both class A and class AB mode at a fantastic price. Choose between 2 x 180 watts in class AB mode, or 2 x 50 watts in class A mode. Dynamic peak power is 2 x 350 watts.


Class A 100 D3 was designed to let you choose between class A mode for the best possible performance, or class AB for maximum power. A robust, yet technically advanced product that offers you perfect balance between high performance and a long lifespan. 

The cabinet 

The new cabinet design, with its softer and smoother edges, is in all essential parts made from highly stable aluminum. This enhances the impression of quality and provides a rigid construction. Outer interference is effectively shielded, and the aluminum helps with heat dissipation, spreading it evenly through the amplifier. A high precision volume control maintains a perfect balance between the channels, regardless of what level is selected. 


When an amplifier is designed the engineer has to consider a number of decisions. Class A mode can be used for optimum performance. Class AB mode is more commonly used as it offers much higher efficiency and reduced power consumption. The Class A100 D3 offers both options, conveniently selectable using the remote control.There is also an Auto-mode where the amp can switch mode by itself based on the temperature measured at the output stage. 

Technical presentation

The amplifier is equipped to offer you top end performance. All inputs and outputs are gold plated high quality units. A powerful toroidal transformer guarantees an efficient power supply. Switching between inputs/signal sources is done using gold plated relays, to minimize distorsion and provide the shortest possible signal path. All sections are separately shielded to minimize cross hearing and interference. Twin differential input stages and fully symmetrical circuitry through the complete signal path ensures perfect performance. The differential circuit helps suppress distortion, especially the odd overtones. The output stage itself provides High End performance thanks to the use of fast bipolar transistors from Toshiba, which are also capable of very high output currents and handling tricky load impedances. 

LP player input 

Having considered customers feedback we added a RIAA input to let you connect a LP player without having to use a separate preamp. The RIAA input can be used with both MM- and MC pickups. Areas of useThe Class A100 D3 can be used together with other amps and preamps thanks to the PRE OUT and AMP IN connections. For example, you can connect a D3 to drive the front speakers in a home cinema setup. There is also a SUB OUT to drive active subwoofers if desired. 

Technical Specification

Output power class AB

2x110W 8 ohm RMS

2x180W 4 ohm RMS

2x300W 2 ohm RMS

Output power class A

2x50W 8 ohm RMS

Technical data

Distortion: <0.03% (20hz to 20khz, 10w) 

Input sensibility : 1.0Vrms 

Damping factor: > = 100 Input

Impedance: 20 kohm 

4 output transistors per channel 

Ring-core transformer 

Phono amplifier (MM~2-5mV/MC~0,5mV) 

Connections and settings

4 Line in 

4st Coaxial input 

1st Optical input 

1st Pre Out (for external amp) 

1st Sub Out (for an activ subwoofer) 

Gold-plated RCA connections 

Rec Out (for connecting to a tape recorder etc.) 

Amp In (for connecting directly to the power amplifier of Class A-100D) 

Solid gold-plated loudspeaker connections for banana plugs, fork plugs and screw plug 

Phono Amplifier (MM & MC) 

Frequency range 

5-50k Hz (non flatness <0.5db) 


Remote control in aluminium