Rupert Neve Designs RNHP User Manual

RNHP:
Precision Headphone Amplifier
User Guide
Common Source Devices
In addition to being able to drive a wide variety of headphones without sacricing performance, the RNHP is also capable of
receiving a wide array of signals with its 3 separately calibrated inputs. Here are some common examples:
Maximum Input Levels
XLR I/P: +22.8 dBu @1kHz, RCA I/P: +14.7dBu @1kHz, 3.5mm I/P: +3.3dBu @1kHz
Output Power:
As measured with headphones, Z=44 Ω: 3.617 VAC RMS @1kHz = 300mW RMS
16 Ω typical Load: 1.933 VAC RMS @1kHz = 230mW RMS
150 Ω typical Load: 5.108 VAC RMS @1kHz = 175mW RMS
Output Impedance
.08 Ω @ 1KHz, 16-150 Ω load, 0dBu input
Frequency Response
+/- .2dB from 10Hz to 120KHz
Noise
With typical headphones, Z=44 Ω, BW 22Hz – 22kHz
XLR Input: -101.9dBV, RCA Input: -100.9dBVdBu, 3.5mm Input: -88.8dBV
Power Supply Requirements
24VDC @ 0.25Amp (6 watt) minimum. Use with supplied power adapter, as this has been carefully selected for best output
power and noise performance
“A” +4dBu Line (XLR or TRS) Devices “B” RCA Devices “C” 3.5mm Stereo Devices
Studio Audio Interfaces (Line or Monitor Out)
Headphone Mixers (Line Output or send low level HP out)
Mixing Consoles (Line or Monitor Out)
Professional Turntable Mixers (Line or Monitor)
Professional Stereo Digital to Analogue Converter
Professional Cameras
Studio Monitor Controller
CD Players / DVD Players
Stereo Tuners
Preamplied Turntables
Prosumer Recording Devices / Cameras
Phones
Mobile Music Players
Computers
DSLR Cameras
Handheld Recording Devices
Any 3.5mm headphone output
p/n 775-00024 Rev A

Rupert Neve Designs RNHP Specifications

General

Type	Headphone Amplifier
Input Impedance	10k ohms
Maximum Input Level	+24dBu
Gain	10dB
Inputs	1 x 1/4" TRS
Output	1 x 1/4" TRS
Power Supply	External 24V DC power supply

Summary

Common Source Devices

+4dBu Line (XLR or TRS) Devices

Lists studio audio interfaces, mixing consoles, professional converters, and monitor controllers.

"B" RCA Devices

Lists CD players, DVD players, stereo tuners, and preamplified turntables.

"C" 3.5mm Stereo Devices

Lists phones, mobile music players, computers, DSLR cameras, and handheld recording devices.

Performance Specifications

Maximum Input Levels

Specifies maximum input levels for XLR, RCA, and 3.5mm inputs at 1kHz.

Output Power and Impedance

Details output power for various loads and the unit's low output impedance.

Frequency Response and Noise

Covers the wide frequency range and low noise floor for different inputs.

Power Supply Requirements

Specifies the required 24VDC power supply for optimal performance and noise.

Front / Back Panel

Input Select

Control to select between +4dBu Combo Jack, -10dBV RCA, and 3.5mm Stereo inputs.

Volume Control

A high-precision, damped stereo potentiometer for controlling amplifier volume.

Headphone Output

Near zero output impedance 1/4" stereo output for headphones; min. impedance 16 Ohm.

Connectivity Ports

Details the Line input (XLR/TRS), RCA input, 3.5mm input, and power input connections.

Usage Notes

Performance Monitoring and Unconscious Adaptation

Explains how amplifier accuracy affects musician performance via unconscious response.

Reliable Performance with Headphones

Discusses how reactive headphone loads affect amp performance and RNHP's solution.

VESA Mount

Information on mounting the RNHP using VESA 100 compatible mounts.

Multiple Line Feed

Recommendation for using splitter cables to feed multiple devices from one stereo pair.

High Power Headphone Amplification & Hearing Loss

Warning about the RNHP's high power output and potential for hearing damage.