Build Your Own (Custom Configuration) Audiophile Power Amplifier

1st number is the total amount of channels
2nd number is the amount of High Power Modules
3rd the number is the amount of Stereo Modules

Ex: eleven-3-4-s is
eleven total channels. 3 High Powered Modules and 4 Stereo Modules.

The XPA Gen3 is a fully modular audio power amplifier with a high-efficiency switch mode power supply (SMPS), independent, fully discrete, dual differential, high current, short signal path Class A/B amplifier modules, Optimized Class H™ power supply topology, and microprocessor-controlled fault protection.

The XPA Gen3 is powered by a high efficiency, audiophile grade, Switch Mode Power Supply (SMPS).

Audio Specifications (High-Powered Single Channel Modules)

• Power Output:

300 watts RMS/channel; 20 Hz – 20 kHz; THD<0.1%; 8 Ohms; one channel driven

550 watts RMS/channel; 20 Hz – 20 kHz; THD<0.2%; 4 Ohms; one channel driven

300 watts RMS/channel; THD<0.1%; 8 Ohms; two channels driven

490 watts RMS/channel; THD<0.1%; 4 Ohms; two channels driven

Power Bandwidth (at rated power; 4 Ohm - 8 Ohm load): 20 Hz to 20 kHz (+ / – 0.1 dB)

• Broad Band Frequency Response: 5 Hz to 80 kHz +0/-2 dB

• THD + noise: < 0.005%; at 100 watts RMS; 1 kHz; 8 Ohms

• Signal to Noise Ratio (8 Ohm load):

> 115 dB; ref FTC rated power; unbalanced input (A-weighted)

> 86 dB; ref 1 watt; unbalanced input (A-weighted)

• Minimum Recommended Load Impedance (per channel): 4 Ohms (which equals one 4 Ohm load or two paralleled 8 Ohm loads)

• Damping Factor (8 Ohm load): > 500.

• Input Sensitivity (for rated power; 8 Ohm load): 1.71 V.

• Gain: 29 dB

• Input Impedance:

33 kOhms (balanced)
23.5 kOhms (unbalanced)

Audio Specifications (Stereo Modules)

• Power Output:

65 watts RMS/channel; 20 Hz – 20 kHz; THD<0.1%; 8 Ohms; one channel driven

100 watts RMS/channel; 20 Hz – 20 kHz; THD<0.2%; 4 Ohms; one channel driven

65 watts RMS/channel; THD<0.1%; 8 Ohms; two channels driven

100 watts RMS/channel; THD<0.1%; 4 Ohms; two channels driven

• Power Bandwidth (at rated power; 4 Ohm - 8 Ohm load): 20 Hz to 20 kHz (+ / – 0.1 dB)

• Broad Band Frequency Response: 50 Hz to 80 kHz +0/-1.5 dB

• THD + noise: < 0.02%; at 60 watts RMS; 1 kHz; 8 Ohms.

• Signal to Noise Ratio (8 Ohm load):

> 105 dB; ref FTC rated power; unbalanced input (A-weighted)

> 85 dB; ref 1 watt; unbalanced input (A-weighted)

• Minimum Recommended Load Impedance (per channel): 4 Ohms (which equals one 4 Ohm load or two paralleled 8 Ohm loads)

• Damping Factor (8 Ohm load): > 500

• Input Sensitivity (for rated power; 8 Ohm load): 0.8 V (800 mV)

• Gain: 29 dB

• Input Impedance:

33 kOhms (balanced)

23.5 kOhms (unbalanced)

• Maximum Power Consumption:

Additional Audio Specifications

The Output Power your XPA Gen3 amplifier can deliver with all channels driven will depend on the total number and type of modules you have configured.

The following list shows the power an XPA Gen3 will deliver, all channels driven, into 8 Ohms, when configured with the indicated number of High-Powered Single Channel Modules:

Populated with two modules: 300 watts RMS/channel
continuous < 0.1% THD

Populated with three modules: 275 watts RMS/channel
continuous < 0.1% THD

Populated with four modules: 260 watts RMS/channel
continuous < 0.1% THD

Populated with five modules: 250 watts RMS/channel
continuous < 0.1% THD

Populated with six modules: 225 watts RMS/channel
continuous < 0.1% THD

Populated with seven modules: 200 watts RMS/channel
continuous < 0.1% THD

• Input Connections (High-Powered Single Channel Modules):

Unbalanced (RCA); balanced (XLR); one each per channel, independently selectable.

• Input Connections (Stereo Modules):

2 Unbalanced (RCA); 2 balanced (XLR); two per channel, independently selectable.

• Speaker Output Connections: Audiophile grade, gold plated, 5-way binding posts.

Trigger

• Trigger Input: 5 – 12 V (AC or DC); <10 mA input current required.

• Trigger Output: 12 VDC; can drive any load up to 120 mA.

Power Requirements

Between 100 VAC and 250 VAC @ 50 / 60 Hz (automatically detected)

Front Panel Controls and Indicators

• Standby: push button (halo ring changes color to indicate Standby or On)

• Status LEDs: one per channel; blue

Status LEDs change to red to indicate a fault condition

• AC Power switch: rocker switch (switches AC main power)

• Status LEDs switch: disables front panel Status LEDs and dims Standby button halo.

• Input selector switches (one per channel): metal toggle switches; select between balanced and unbalanced inputs.

• Circuit Breaker: press button to reset circuit breaker.

Protection

The XPA Gen3 is protected against excessive operating
temperature, shorted speaker connections, groundf aults, and other common fault conditions.

Mechanical

• Dimensions (dimensions are the same for all
configurations):

17” wide x 8” high x 19” deep (unboxed; including feet)

17” wide x 7” high x 19” deep (unboxed; without feet)

24-1/2” wide x 12” high x 24-3/4” deep (boxed)

• Weight (weight will depend on the number of modules configured):

- with 2 modules: 35.5 pounds (unboxed)

- with 3 modules: 39 pounds (unboxed)

- with 4 modules: 42.5 pounds (unboxed)

- with 5 modules: 46 pounds (unboxed)

- with 6 modules: 49.5 pounds (unboxed)

- with 7 modules: 53 pounds (unboxed)

* For boxed weight, add 5 lbs to the above weights.