XPS Series

Class-DH switch mode power amplifiers

The XPS-series amplifiers are two-channel class-DH amplifiers at a compact size of 2 HU (rack spaces). All models are equipped with a high-efficient SMPS (switch mode power supply), which ensures top performance and light weight. The front panel shows two gain controls for easy access and the main switch. Two round LED displays inform about the condition of the amplifiers. The rear side shows two XLR input connectors and two XLR output connectors (link). The input sensivity (gain) is 32 dB. Two SPEAKON© outputs and four binding posts are mounted at the rear side. The SPEAKON© connector of the output channel 1 (left) is connected with all four poles. This connector offers additionally the output signal of channel 2 (right) at the pins 2 (+/-). This enables an efficient four-pole connection of two-way speaker systems with one speaker cable only. The XPS-series amplifiers can be switched into three different modesof operation: stereo, parallel and bridge mode. The integrated crossover is equipped with a high-pass filter and a low-pass filter (each 18 dB / Butterworth). The filter type can be set and activated by a switch on the rear panel. The function of the crossover is switched off in position FULLRANGE. The XPS models are equipped with a switchable impedance matching function (except XPS 900 = class-D). This power converter can be set by the OVP switch on the rear panel. The OVP function ensures that the amplifiers deliver full output power even at low impedances. All models are equipped with a switch-on delay function to protect the connected speakers.

XPS_Series01_400

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CAD Drawings

PDF Technical Drawing

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User Manuals

PDF User Manual

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Product Pictures

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300
450
n/a
900
n/a
0.01 %
0.01 %
0.2 %
100
>90
60 dB
19 V / µs
20 k ohms bal. /
10 k ohms bal.
60 dB
2 x front control
LEDS
LEDS
Neutrik© XLR female
Neutrik© XLR male
1.0 volts
Stereo / brigde / parallel
Yes
Neutrik© SPEAKON©
4-pol. + Binding Posts
180 - 242 volts
Yes
Yes
No
120 Hz LPF / HPF
Fullrange
483 x 89 x 335
554 x 123 x 554
8.5 kg / 10.5 kg

8 ohms per channel (watt):
4 ohms per channel (watt):
2 ohms per channel (watt):
8 ohms bridged (watt):
4 ohms bridged (watt):
THD at 1 kHz and 1 dB below clipping:
THD at 100 kHz and 1 dB below clipping:
THD at 10 kHz and 1 dB below clipping:
Damping Factor
Hum and Noise:
Channel separation at 10 kHz:
Slew rate:
Input Impedance:

Common mode rejection:
Gain controls:
Clip / protect indicators:
Output headroom indicators:
Input connectors:
Link connectors:
Input Sensitivity V rms (8 Ohms)
Mode switch:
Limiter:
Output connectors:
 
Operation voltage:
Soft start:
Switch mode power supply (SMPS)
OVP Power Converter:
Switch Crossover (18dB/Butterworth):

Dimensions unit (mm) W x H x D:
Dimensions packing (mm) W x H x D:
Weight (net / gross):

JPG Picture XPS900

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JPG Picture XPS1400

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JPG Picture XPS2000

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JPG Picture XPS3000

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JPG Picture XPS3600

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OVP Power Converter | Full Output Power at any Impedance.
In theory, an amplifier that delivers 500 watts into an 8-ohm load, offers analogous to Ohm's law 2.000 watts to a 2-ohm load. In practice, many amps deliver 65% -77% of the theoretical 4-ohm power at 2 ohms only. The resulting losses come from the voltage power supply and from the current limitations of the output stages. The current limiter in the output stage generates additional distortion, which has to do with the impedance curve of the loudspeaker connected. The speaker represents a dummy load to the amplifier. A large part of the energy is returned to the amplifier and may activate the current protection circuit (current limiter) externally. The NOVA Over-Voltage Protection (OVP) is a special power converter that can deliver more power than it has previously taken from the power supply. Due to this, it delivers the required current even at lower impedances. To drive a higher impedance (such as a speaker with an impedance of 8 ohms) a higher voltage is required. Using the OVP switch (not in XPS 900 model), the user can adjust the NOVA XPS amplifiers exactly to the impedance of the loudspeaker connected.

► Full power output even at low impedances


Class-DH | Sounds like "Class-H" - Efficient like "Class-D“.
A class-H amplifier is basically a class-AB amplifier, the supply voltage can be changed in dependence on the signal. At high power output levels of the amplifier, the class-H design is used to reduce the voltage drop and dissipation power in the output transistors considerably. The voltage increase is split at class-H amplifiers in 2 or 3 stages in the power supply. Disadvantages of class-H are the higher circuit complexity and low distortion when switching to the higher voltage level. The efficiencies of class-H amplifiers are between 60% to over 80%, depending on the circuit design. Class-DH is the evolution of the class-H technology. Class-DH has all the advantages of the class-H technology, but without switching to any higher or lower voltage level(s). Class-DH amplifiers are equipped with a dynamic adaptive voltage regulator that regulates the supply voltage continuously. The usually occuring distortion when switching to the higher supply voltage, is typically for class-H amplfiers. This kind of distortion does not occur in class-DH amplifiers at all. The efficiencies of the class-DH amplifiers are over 90% at full load.

► Distortion-free sound due to continuous control of the supply voltage
► Higher efficiency and less power consumption
► Less heat by very low power loss


Integrated Crossover for increased Flexibility.
For larger and more complex speaker systems, we recommend using a digital loudspeaker management system, which takes over the function of a crossover. For smaller systems, such as a system consisting of two 18" subwoofers and two 2-way mid/high loudspeakers, the users often rely on cost efficiency and flexibility. Therefore, all NOVA XPS amplifiers are equipped with a high pass filter (120 Hz / 18 dB / Butterworth) and a low-pass filter (120 Hz / 18 dB / Butterworth). The filter type can be selected on the rear side of the XPS amplifiers by using a switch. The crossover function is disabled in position FULLRANGE.

► High flexibility and cost-effective configuration of smaller systems


Undistorted Bass Independent from Voltage.
The core of the NOVA XPS amplifiers is the variable SMPS switching power supply, which provides stable performance even with voltage fluctuations in the mains supply (~230V +/-10%). The power supply is designed specifically for the NOVA class-DH amplifier technology. It provides a stable power supply for uncompromising performance even at full load and low-impedance. The use of this highly efficient power supply also leads to a very low weight of the XPS power amplifiers.

► Stable performance at full load and fluctuating voltage from the mains
► Stable bass reproduction even at full load
► Lightweight

450
700
900
1.400
1.700
0.01 %
0.01 %
0.2 %
500
>90
60 dB
19 V / µs
20 k ohms bal. /
10 k ohms bal.
60 dB
2 x front control
LEDS
LEDS
Neutrik© XLR female
Neutrik© XLR male
1.23 volts
Stereo / brigde / parallel
Yes
Neutrik© SPEAKON©
4-pol. + Binding Posts
180 - 242 volts
Yes
Yes
Yes
120 Hz LPF / HPF
Fullrange
483 x 89 x 415
554 x 123 x 554
10 kg / 12 kg

900
1.500
1.800
3.000
3.600
0.01 %
0.01 %
0.2 %
1.000
>90
60 dB
19 V / µs
20 k ohms bal. /
10 k ohms bal.
60 dB
2 x front control
LEDS
LEDS
Neutrik© XLR female
Neutrik© XLR male
1.4 volts
Stereo / brigde / parallel
Yes
Neutrik© SPEAKON©
4-pol. + Binding Posts
180 - 242 volts
Yes
Yes
Yes
120 Hz LPF / HPF
Fullrange
483 x 89 x 441
554 x 123 x 554
12 kg / 14 kg

650
1.000
1.300
2.000
2.300
0.01 %
0.01 %
0.2 %
1.000
>90
60 dB
19 V / µs
20 k ohms bal. /
10 k ohms bal.
60 dB
2 x front control
LEDS
LEDS
Neutrik© XLR female
Neutrik© XLR male
1.4 volts
Stereo / brigde / parallel
Yes
Neutrik© SPEAKON©
4-pol. + Binding Posts
180 - 242 volts
Yes
Yes
Yes
120 Hz LPF / HPF
Fullrange
483 x 89 x 415
554 x 123 x 554
10.3 kg / 12.3 kg

1.000
1.800
2.200
3.600
4.400
0.01 %
0.01 %
0.2 %
1.000
>90
60 dB
19 V / µs
20 k ohms bal. /
10 k ohms bal.
60 dB
2 x front control
LEDS
LEDS
Neutrik© XLR female
Neutrik© XLR male
1.4 volts
Stereo / brigde / parallel
Yes
Neutrik© SPEAKON©
4-pol. + Binding Posts
180 - 242 volts
Yes
Yes
Yes
120 Hz LPF / HPF
Fullrange
483 x 89 x 441
554 x 123 x 554
12 kg / 14 kg

XPS 900
Class-D

XPS 1400
Class-DH

XPS 2000
Class-DH

XPS 3000
Class-DH

XPS 3600
Class-DH

xps1400small
xps900small
xps2000small
xps3000small
xps3600small

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