Introduction to the Dual Channel HPA-nxV202ps

The HPA-nxV202PS is the smaller brother to the HPA-nx203ps amplifier module and the next step in the nxV20Xps series of amplifiers.  Based on the very popular HPA-nxV200, the HPA-nxv202ps is designed to meet the needs of people who want to have an easier solution to building their own multi channel high end audio amplifier or an even simplier solution to building a two channel amplifier, for applications based around active or DSP based loudspeakers or multi channel home theatre amplifiers or as mentioned a high end stereo amplifier.

The HPA-nxV202ps amplifier employs an improved input stage using Folded Cascode fully complementary differential input stage as well as two nested feedback loops. This improves the imaging and overall presents too an even higher level than before compared to the standard HPA-nxV200 module.

What we have done with the HPA-nxV202ps is to combine Two upgraded nxV200 amplifier modules and a high performance low noise linear power supply. In a very compact form factor measuring only 220mm x 73 x 45mm.

The power supply section of the nxV202ps has two high current Shottky diode full wave rectifiers and comes standard with four 10,000uf 63 volt high quality filter capacitors on board, making a total filter bank of 40,000uf on board.

Protection is provided by SMD fuses in each supply rail and overload and short circuit protection is provided by Gate protection circuitry.

One of the more notable features of the nxV202ps module is the ability of the module to bridge channel one and channel two with no more than a single jumper. This makes channel One and channel Two into a single high power 310 watt amplifier

To get the HPA-nxV202PS amplifier module up and running, all that is required is a 400VA transformer with 2 x 35vac secondary windings and a suitable heat sink such as the Conrad MF30-75 for each three channel module.

The power trasformers can be ordered from Harbuch Electronics. A link for Harbuch Electronics can be found in the Links page of this web site.

The amplifier module is also supplied with audiophile grade Nichicon KW MUSE supply de-couplers and Nichicon MUSE ES BP capacitors for the feedback circuit as standard.

The HPA-nxV202ps amplifier module comes with a full mounting kit which includes 4 x 10mm metal PCB stand offs, 6 x Silicon insulation washers and 10 x M3 bolts to mount the module and output stage on to the heat sink.

What you need to build a nxV202ps Amplifier!

• 1 x HPA-nxV202ps dual channel module.
• 1 x 400VA power transformer.
• 1 x Conrad MF25-75 heat sink.
• 1 x 2U rack style chassis.
• 1 x set of Input and Output chassis terminators.

     Key Features

• Designed for Stereo Amplifier,  Active Loudspeakers and Multi-Channel HT Amplifiers.
• 110/180 watts RMS per channel.
• 40,000uf of supply filtering.
• Dual high current full wave recifiers.
• In Bridge Mode over 300 watts into 8 ohms Using Ch1 & Ch2, via jumper.
• Only two nxV202PS modules needed to make a four channel amplifier.
• Two to Four channels powered from a single power transformer or SMPS.
• Can be powered from audio grade SMPS or linear power transformer.
• Very compact and very high end sound quality.
• Measuring only 220mm x 73mm x 40mm.
• 2 Channels with PSU can be installed onto a Conrad MF25-75 heat sink.
• Add a power transformer, chassis and you have the makings of a great HT amp.
• Four Channels can be installed into a standard 2U 19" rack case with power transformer.

     Preliminary Specifications

• 110 Watts RMS continuous sine wave into 8 Ω Per Channel
• 180 Watts RMS continuous sine wave into 4 Ω Per Channel
• 310 Watts RMS continuous sine wave into 8 Ω Channel One and Channel Two in Bridge Mode.
• The HPA-nxV202PS is 2 Ω Stable
• Biased into Class A/B
• Power Bandwidth 3.5hz to 660khz -3dB
• Dampening Factor At 100hz  8Ω = 800
• Dampening Factor At 1khz    8Ω = 650
• Dampening Factor At 10khz  8Ω = 250
• RCA Single ended Input impedance 33kΩ
• Single Ended Input Gain = 30.6dB
• THD+N - Typically 0.002%
• Recommended Linear Voltage Supply +-50 volts DC
• Operational Supply Voltage Range +-10v DC to +-60 volts DC
• PSU Power Transformer secondary windings 0-35vac + 0-35vac (400VA to 500VA)
• Printed Circuit Board Dimensions 220mm x 75mmx 40mm
• Recommended Minimum Conrad Heat Sink MF30-75 or MF30-100
• Conrad MF30-75 Heat Sink Dimensions 300mm x 75mm x 45mm