The NXL550 R1.0 amplifier module is a high performance, hi end amplifier module capable of over 500 watts into 4 Ohms and is 2 Ohm and 1 Ohm stable for short periods (60 sec).
Directly driven from an OPA462 High Voltage Op Amp.
It features the option of adding separate regulated input/driver stage supplies for even high performance.
The current power measurements were done on a +-70vdc linear power supply, higher power outputs can be achieved with voltage supplies as high as +-75 volts and with other versions that are capable of handling DC power supplies as high as +-90 volts DC.
The main PCB has an over temperature and over current LED status Flag which also serves as an output clipping indicator.
Specifications:
8 Ohms: 245W per channel, powered from +-70vdc supply rails
4 Ohms: 425W per channel powered from +-70vdc supply rails
8 Ohms: 300W per channel, powered from +-80vdc supply rails
4 Ohms: 545W per channel powered from +-80vdc supply rails
Frequency Response: 20Hz-20Khz, -0.1db, 3Hz-210KHz, -3dB Input filter limited.
THD: 0.002%, 1khz, @200W into 8 ohms: 0.01% 10khz @200 Watts into 8 Ohms
IMD: 0.002%, @200W RMS into 8 ohms
SNR: -105dB, Unweighted, referenced to full output; -112.6dB A-Weighted
Damping Factor: 800 into 8 ohms, 100Hz
Gain: 22 (27dB) other gain options are available upon request?
Input Impedance: 22k Ohms Unbalanced:
Inputs: RCA Phono
Recommended Linear Voltage Supply +-70 Volts DC
For higher power output +-75vdc can be used.
PSU Power Transformer secondary windings 50vac (800VA)
Printed Circuit Board Dimensions 105mm x 72mm
Small form factor PCB
Captured Images Showing the following.
1Khz Sine Wave driving 8 Ohm load
1khz Square Wave response driving 8 Ohm load
10khz Clipping response driving 8 Ohm load
10khz Square Wave response driving 8 Ohm load
Directly driven from an OPA462 High Voltage Op Amp.
It features the option of adding separate regulated input/driver stage supplies for even high performance.
The current power measurements were done on a +-70vdc linear power supply, higher power outputs can be achieved with voltage supplies as high as +-75 volts and with other versions that are capable of handling DC power supplies as high as +-90 volts DC.
The main PCB has an over temperature and over current LED status Flag which also serves as an output clipping indicator.
Specifications:
8 Ohms: 245W per channel, powered from +-70vdc supply rails
4 Ohms: 425W per channel powered from +-70vdc supply rails
8 Ohms: 300W per channel, powered from +-80vdc supply rails
4 Ohms: 545W per channel powered from +-80vdc supply rails
Frequency Response: 20Hz-20Khz, -0.1db, 3Hz-210KHz, -3dB Input filter limited.
THD: 0.002%, 1khz, @200W into 8 ohms: 0.01% 10khz @200 Watts into 8 Ohms
IMD: 0.002%, @200W RMS into 8 ohms
SNR: -105dB, Unweighted, referenced to full output; -112.6dB A-Weighted
Damping Factor: 800 into 8 ohms, 100Hz
Gain: 22 (27dB) other gain options are available upon request?
Input Impedance: 22k Ohms Unbalanced:
Inputs: RCA Phono
Recommended Linear Voltage Supply +-70 Volts DC
For higher power output +-75vdc can be used.
PSU Power Transformer secondary windings 50vac (800VA)
Printed Circuit Board Dimensions 105mm x 72mm
Small form factor PCB
Captured Images Showing the following.
1Khz Sine Wave driving 8 Ohm load
1khz Square Wave response driving 8 Ohm load
10khz Clipping response driving 8 Ohm load
10khz Square Wave response driving 8 Ohm load
All of the technical testing has been completed and now for the listening tests.
The new NXL550 R1.0 amplifier modules have been mounted on a pair of our own planar heat sinks,
The sound quality is very good, with wide open and detailed sound stage, imaging is very well focused, the presentation sits on a inky black background.
No hint of harshness at all at any SPL, very clean and powerful, it just does not run out of power, very dynamic, bass response is well extended and tight, just a real pleasure to listen too!
A pair of new cases are currently been built for the new amplifier modules, they will feature a fully CNC machined and anodized front panels and other new features yet to be revealed and the new mono block amplifiers will also feature a new 1300 watt power plant per channel, to handle the 2 ohm loads up to 700 watts.
More to come!
The new NXL550 R1.0 amplifier modules have been mounted on a pair of our own planar heat sinks,
The sound quality is very good, with wide open and detailed sound stage, imaging is very well focused, the presentation sits on a inky black background.
No hint of harshness at all at any SPL, very clean and powerful, it just does not run out of power, very dynamic, bass response is well extended and tight, just a real pleasure to listen too!
A pair of new cases are currently been built for the new amplifier modules, they will feature a fully CNC machined and anodized front panels and other new features yet to be revealed and the new mono block amplifiers will also feature a new 1300 watt power plant per channel, to handle the 2 ohm loads up to 700 watts.
More to come!
