Benchmark HPA4 Instruction Manual
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Benchmark HPA4 Instruction Manual

Reference stereo headphone amplifier and reference line amplifier with relay gain and input control
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Benchmark HPA4
Instruction Manual
Reference Stereo Headphone Amplifier
and
Reference Line Amplifier
with
Relay Gain and Input Control

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Summary of Contents for Benchmark HPA4

  • Page 1 Benchmark HPA4 Instruction Manual Reference Stereo Headphone Amplifier Reference Line Amplifier with Relay Gain and Input Control...

  • Page 2: Safety Information

    EQUIPPED WITH A STANDARD IEC POWER ENTRY MODULE. USE AN IEC POWER CORD THAT IS EQUIPPED WITH THE APPROPRIATE CONNECTOR FOR YOUR LOCATION. CORDS ARE AVAILABLE FROM YOUR DEALER. Instruction Manual for HPA4 with 1.0.X Firmware – REV B Page 2...

  • Page 3: Table Of Contents

    Settings Menu Screens Software Version Identification DISPLAY Settings INPUT SETUP Performance Graphs RENAME INPUT VOLUME SETUP SETTINGS LOCK POWER Settings REMOTE Settings ABOUT Screens SPLASH SCREEN RESET Screens Instruction Manual for HPA4 with 1.0.X Firmware – REV B Page 3...
  • Page 4 AC Power-Entry and Fuse Module Regulatory Compliance FCC Notice (U.S. Only) RoHS Compliant Information CE Certificate of Compliance Warranty Information Benchmark 1-Year Warranty Benchmark Extended Warranty Options 57 Notes on Warranty Repairs Instruction Manual for HPA4 with 1.0.X Firmware – REV B Page 4...

  • Page 5: Front Panel

    Front Panel Rear Panel Instruction Manual for HPA4 with 1.0.X Firmware – REV B Page 5...

  • Page 6: Features

    High-Efficiency Low-Noise Power Supplies – 100-240 VAC, 50-60 Hz  Meets FCC Class B and CE emissions requirements  Tested for immunity to radiated and conducted RF interference  Instruction Manual for HPA4 with 1.0.X Firmware – REV B Page 6...

  • Page 7: Quick Start Guide

    Quick Start Guide Main Screen Instruction Manual for HPA4 with 1.0.X Firmware – REV B Page 7...

  • Page 8: Balance Controls

    Balance Controls Instruction Manual for HPA4 with 1.0.X Firmware – REV B Page 8...

  • Page 9: Screen Navigation

    Screen Navigation Instruction Manual for HPA4 with 1.0.X Firmware – REV B Page 9...

  • Page 10: Display Settings

    Display Settings Instruction Manual for HPA4 with 1.0.X Firmware – REV B Page 10...

  • Page 11: Remote Control

    Selects input D3 on DAC if connected. Selects input D4 on DAC if connected. Selects USB input on DAC if connected. Analog Selects analog input(s) on DAC if connected. Instruction Manual for HPA4 with 1.0.X Firmware – REV B Page 11...

  • Page 12: Front Panel Controls

    (headphone, line, or of additional components. both). The chart at the right summarizes the functions of the power button and volume knob. Instruction Manual for HPA4 with 1.0.X Firmware – REV B Page 12...

  • Page 13: Connecting Other Audio Components

    10 dB boost or cut without sacrificing performance. Selecting Components for Your System Select devices with balanced XLR inputs and outputs. Balanced interfaces are vastly superior to unbalanced RCA interfaces. Instruction Manual for HPA4 with 1.0.X Firmware – REV B Page 13...

  • Page 14: Connecting Benchmark Components

    HPA4. This if you wish to release the MUTE and DIM on trigger connection provides a control all devices. link so that the remote, DAC or HPA4 Instruction Manual for HPA4 with 1.0.X Firmware – REV B Page 14...

  • Page 15: Basic Features

    Balance Adjust Press the BAL button on the HOME screen to change the L/R balance of the headphone and/or line outputs. These are independently adjustable. Instruction Manual for HPA4 with 1.0.X Firmware – REV B Page 15...

  • Page 16: Advanced Features (Settings Screens)

    Remote (IR Enable, DAC Mode) About (System Information) • Display Settings • Input Setup • Lock/Unlock Advanced Settings • Settings 3 Reset Advanced Settings • Full Factory Reset • Instruction Manual for HPA4 with 1.0.X Firmware – REV B Page 16...

  • Page 17: Display Settings

    DISPLAY Settings 2 DISPLAY Settings Screen Dim Timer • 'WAKE ON VOLUME' Function Display Settings 1 • Maximum Screen Brightness • Screen Brightness when Dimmed • Instruction Manual for HPA4 with 1.0.X Firmware – REV B Page 17...
  • Page 18 DISPLAY Settings 3 Display Sleep Timer (screen off) • Menu Timer (return to home page) • Instruction Manual for HPA4 with 1.0.X Firmware – REV B Page 18...

  • Page 19: Input Setup

    • Disable/Enable Inputs Boost Adjust (input volume offset) • • • Volume Setup for Each Input SETTINGS LOCK RENAME INPUT Lock/Unlock Advanced Settings • Input Name Edit • Instruction Manual for HPA4 with 1.0.X Firmware – REV B Page 19...

  • Page 20: Power Settings

    POWER Settings Auto-On - Enable/Disable • 12V Trigger Mode • Instruction Manual for HPA4 with 1.0.X Firmware – REV B Page 20...

  • Page 21: Remote Settings

    REMOTE Settings • Enable IR Remote Control Integrate with Benchmark DAC • Instruction Manual for HPA4 with 1.0.X Firmware – REV B Page 21...

  • Page 22: About Screens

    Unit is Turning On or Off, Audio is • ABOUT BENCHMARK Muted May be manually enabled from ABOUT • Benchmark Contact Information screen (this does not mute the audio, • touch the screen to exit). Instruction Manual for HPA4 with 1.0.X Firmware – REV B Page 22...

  • Page 23: Reset Screens

    RESET Screens FACTORY RESET Reset all Advanced Settings Including RESET SETTINGS • Input Names Reset all Advanced Settings Except • Input Names Instruction Manual for HPA4 with 1.0.X Firmware – REV B Page 23...

  • Page 24: Hpa4 System Overview

    0.5 dB increments. These gain stages feature the finest gold- Benchmark D/A converters include differential contact relays available. amplifiers, but many competing converters Instruction Manual for HPA4 with 1.0.X Firmware – REV B Page 24...

  • Page 25: Powerful Headphone Output

    We recommend using the 4-pin jack because This function provides a temporary volume the XLR connector provides lower contact reduction and an easy return to the previous resistance than the TRS connector. Instruction Manual for HPA4 with 1.0.X Firmware – REV B Page 25...

  • Page 26: 12V Trigger

    The HPA4 will pull inches of space above or below a power the trigger I/O to 12 volts DC while the HPA4 amplifier. The magnetic fields produced by is on. If the HPA4 is off and an external...

  • Page 27: Audio Line Inputs

    HPA4 are automatically boosted by 15.8 dB unbalanced outputs. Balanced inputs are so that they will match the level of the assumed to be 15.8 dB hotter than professional-grade balanced inputs. If the unbalanced. Instruction Manual for HPA4 with 1.0.X Firmware – REV B Page 27...

  • Page 28: Headphone Outputs

    TRS jacks available, but the voltage sensitivities. performance of the TRS jack is highly dependent upon the quality and condition of Instruction Manual for HPA4 with 1.0.X Firmware – REV B Page 28...

  • Page 29: Thx-888 Amplifier

    After the drivers have cooled, the connection will be restored. This cooling cycle may take several minutes. Instruction Manual for HPA4 with 1.0.X Firmware – REV B Page 29...

  • Page 30: Advanced Feature Details

    Typical Trigger Applications The 12V TRIGGER I/O can be used to turn Typical trigger applications: other audio components on when the HPA4 turns on. The HPA4 can also turn on and off HPA4 → Amplifier • in response to other connected components.

  • Page 31: Software Version Identification

    If the HPA4 is used to turn the system on, Tip: The trigger ports can be connected with any connected AHB2 amplifiers will become 2-conductor or 3-conductor 1/8"...

  • Page 32: Performance Graphs

    Graph 1 - Stepped Gain Control - THD vs. Gain (-15 dB to +15 dB) The relay-controlled stepped gain controls are a key feature of the HPA4. The headphone and line outputs have fully-independent controls. These stepped gain controls are designed to provide volume control over a wide operating range without adding any significant noise or distortion.
  • Page 33 This shows that the active balanced output buffers do not add any significant noise to the stepped gain control. The active output buffers are important because they provide low impedance drive to downstream devices (such as power amplifiers and the internal THX-888 headphone amplifier). Instruction Manual for HPA4 with 1.0.X Firmware – REV B Page 33...
  • Page 34 The test tone is 1 kHz. The test tone level was varied to sweep the output power from 0.06 • Watts to 6 Watts. Balanced inputs to headphone outputs, volume control set at 0 dB. • Instruction Manual for HPA4 with 1.0.X Firmware – REV B Page 34...
  • Page 35 The THD measurement bandwidth is 48 kHz. • The test tone is swept from 20 Hz to 20 kHz. • • Balanced inputs to headphone outputs, volume control set at 0 dB. Instruction Manual for HPA4 with 1.0.X Firmware – REV B Page 35...
  • Page 36 0-dBu test tone. The small +/- 0.003 dB random variations shown are due to the measurement limitations of the AP2722. Balanced inputs to balanced line outputs, volume control set at 0 dB. • Instruction Manual for HPA4 with 1.0.X Firmware – REV B Page 36...
  • Page 37 The scale on the left (dBr A) is dB relative to the output level at 1 kHz. The test used a • 0-dBu test tone. Balanced inputs to headphone outputs, volume control set at 0 dB. • Instruction Manual for HPA4 with 1.0.X Firmware – REV B Page 37...
  • Page 38 The scale on the left (dBr A) is dB relative to the output level at 1 kHz. The test used a • 0-dBu test tone. Balanced inputs to headphone outputs, volume control set at 0 dB. • Instruction Manual for HPA4 with 1.0.X Firmware – REV B Page 38...
  • Page 39 Notes: The vertical scale is the phase difference between the left and right channels. • Balanced inputs to balanced outputs, volume control set at 0 dB. • Instruction Manual for HPA4 with 1.0.X Firmware – REV B Page 39...
  • Page 40 0.1 degree. Notes: The vertical scale is the phase difference between the left and right channels. • • Balanced inputs to headphone outputs, volume control set at 0 dB. Instruction Manual for HPA4 with 1.0.X Firmware – REV B Page 40...
  • Page 41 Graph 10 - FFT Idle Channel Noise - Balanced In to Balanced Out The HPA4 is an exceptionally quiet line amplifier. This allows it to be inserted between a Benchmark DAC3 and an AHB2 power amplifier without degrading the noise performance of the system.
  • Page 42 Graph 11 - FFT Idle Channel Noise - Balanced In to Headphone Out This graph shows the noise performance of the HPA4 from the balanced inputs to the output of the THX-888 headphone amplifier. This extraordinary performance keeps noise at inaudible levels, even when using high-efficiency headphones.
  • Page 43 AHB2 power amplifier to full output power. It is also the level required to drive the internal THX-888 to full output power. Balanced inputs to balanced line outputs, volume control set at 0 dB. • Instruction Manual for HPA4 with 1.0.X Firmware – REV B Page 43...
  • Page 44 AHB2 power amplifier to full output power. It is also the level required to drive the internal THX-888 to full output power. Balanced inputs to headphone outputs, volume control set at 0 dB. • Instruction Manual for HPA4 with 1.0.X Firmware – REV B Page 44...
  • Page 45 Balanced inputs to balanced line outputs, volume control set at 0 dB. The 1 kHz fundamental has been removed using a notch filter. This filter increases the • resolution of the AP2722 test system. Instruction Manual for HPA4 with 1.0.X Firmware – REV B Page 45...
  • Page 46 Unbalanced inputs to unbalanced line outputs, volume control set at 0 dB. • The 1 kHz fundamental has been removed using a notch filter. This filter increases the • resolution of the AP2722 test system. Instruction Manual for HPA4 with 1.0.X Firmware – REV B Page 46...
  • Page 47 Balanced inputs to headphone outputs, volume control set at 0 dB. • • The 1 kHz fundamental has been removed using a notch filter. This filter increases the resolution of the AP2722 test system. Instruction Manual for HPA4 with 1.0.X Firmware – REV B Page 47...
  • Page 48 Balanced inputs to balanced line outputs, volume control set at 0 dB. • • The 10 kHz fundamental has been removed using a notch filter. This filter increases the resolution of the AP2722 test system. Instruction Manual for HPA4 with 1.0.X Firmware – REV B Page 48...
  • Page 49 Balanced inputs to headphone outputs, volume control set at 0 dB. • • The 10 kHz fundamental has been removed using a notch filter. This filter increases the resolution of the AP2722 test system. Instruction Manual for HPA4 with 1.0.X Firmware – REV B Page 49...

  • Page 50: Specifications

    Volume Control Range (with 0 dBFS digital input) Mute, -112 dB to +15 dB in 0.5 dB steps Balance Control Range +/- 6 dB in 0.5 dB steps Instruction Manual for HPA4 with 1.0.X Firmware – REV B Page 50...

  • Page 51: Unbalanced Analog Outputs

    Input Impedance >50 k Ohms Maximum Input Level +12.2 dBu, 3.2 Vrms Input Selection and Muting Gold-Contact Relays Input State when Power is Off Inputs are Disconnected using Relays Instruction Manual for HPA4 with 1.0.X Firmware – REV B Page 51...

  • Page 52: Status Display

    HPA4 with remote, power cord and manual 9 lb. Shipping weight 12 lb. Model Numbers The HPA4 model number is 450-17200-XXX XXX is a code for the chassis color Instruction Manual for HPA4 with 1.0.X Firmware – REV B Page 52...

  • Page 53: Ac Power-Entry And Fuse Module

    The HPA4 is equipped with a standard IEC power entry module. Use an IEC power cord that is equipped with the appropriate connector for your location. Cords are available from your dealer. Instruction Manual for HPA4 with 1.0.X Firmware – REV B Page 53...

  • Page 54: Regulatory Compliance

    (European Union) directive 2002/95/EC, or, RoHS (Restrictions of Hazardous Substances). As of July 01, 2006, All Benchmark Media Systems, Inc. products placed on the European Union market are compliant (containing quantity limit weight less than or equal to 0.1% (1000 ppm) of any homogeneous Lead (Pb), Mercury (Hg), Hexavalent Chromium (Cr VI), and flame retardant Polybrominated Biphenyls (PBB) or Polybrominated Diphenyl Ethers (PBDE)).

  • Page 55: Ce Certificate Of Compliance

    CE Certificate of Compliance Note: The HPA4 model number is 450-17200-XXX where XXX is a code for the chassis color. Instruction Manual for HPA4 with 1.0.X Firmware – REV B Page 55...

  • Page 56: Warranty Information

    In the event of failure of a product under this warranty, Benchmark Media Systems, Inc. will repair, at no charge, the product returned to its factory. Benchmark Media Systems, Inc. may, at its option, replace the product in lieu of repair.

  • Page 57: Benchmark Extended Warranty Options

    Benchmark Extended Warranty Options The Benchmark Extended 5-Year Warranty * Benchmark Media Systems, Inc. optionally extends the standard 1-year warranty to a period of five years from the date of delivery. *For the extended warranty to become effective, the original purchaser must register the product at the time of purchase either by way of the enclosed registration card or through the product registration section of the Benchmark Media Systems, Inc.
  • Page 58 Benchmark Media Systems, Inc. All rights reserved. Benchmark Media Systems, Inc. Benchmark Media Systems, Inc. 203 East Hampton Place, STE 2 Syracuse, NY 13206 PHONE: +1-315-437-6300 FAX: +1-315-437-8119 benchmarkmedia.com Instruction Manual for HPA4 with 1.0.X Firmware – REV B Page 58...

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