The power amplifier performs the simple but critical job of boosting
the output signals from each channel of your stereo preamp or surround
sound processor to the level necessary to drive your loudspeakers. While
this may seem trivial, a really good power amp is essential to having a
great audio system, because any flaws in the performance of your power
amp are going to limit the performance of your entire system. Every
amplifier in the new Third Generation XPA series was carefully designed
to deliver superb technical performance, unsurpassed sound quality, and
an exceptionally accurate and dynamic rendition of all types of music,
thus ensuring that your entire system will sound its absolute best. Each
individual XPA amplifier is modular, and can be customized to provide
exactly the power and number of channels you need today, and expanded
later if your needs change; and multiple matching chassis enable you to
add even more channels, or more power, for a near endless variety of
options.
XPA-7
The new XPA-7 is a seven-channel audiophile quality power amplifier, and is perfect for powering:
All 7 main channels in a superb 7.1 channel home theater system
A high-end 5.1 channel system with bi-amped front speakers
The 7 main channels in an Atmos or DTS-X system with height speakers
Configuration:
7 x High-Powered Single-Channel Modules (all slots populated)
Power output:
200 watts/channel RMS into 8 Ohms; all channels driven
Circuit Topology
The XPA-7 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-7 is powered by a high efficiency, audiophile grade, Switch Mode Power Supply (SMPS).
Audio Specifications
The XPA-7 Gen3 features seven of our High-Powered Single Channel Modules.
Audio Specifications (Seven 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
• 200 watts RMS/channel; THD<0.1%; 8 Ohms; ALL SEVEN 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):
• > 117 dB; ref FTC rated power; unbalanced input (A-weighted)
• > 91 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
Note: The values shown refer to the amount
of power the amplifier would consume while playing test tones
continuously, on all channels, at full power, into a load bank.
Therefore they are not at all characteristic of what you would expect
when playing music or the sound track from a movie.
Normal audio
signals are dynamic, so the amount of power they require from second to
second varies widely, and the average is far lower than this. With
normal content, even playing very loudly, one of our amplifiers will
consume far less power than indicated in the chart, so these
values should not be considered to be a circuit requirement for normal
operation.
Input Impedance:
• 33 kOhms (balanced)
• 23.5 kOhms (unbalanced)
Input And Output Connections
•
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.
Rear Panel Controls
• 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 an
Maximum Power Consumption: 2,600 watts.
320 watts/channel RMS into 4 Ohms; all channels driven
300 watts/channel RMS into 8 Ohms; two channels driven
490 watts/channel RMS into 4 Ohms; two channels driven
