Fostex FW168HR Technology White Paper

Fostex FW168HR Technology White Paper

Near field studio monitor

Advertisement

Quick Links

Perkins Electro-Acoustic Research Laboratory, Inc.
Please note that the links in the P
and can be used to direct your web browser to our site or to
open an e-mail message window addressed to ourselves.
To see the feedback we have left for our customers,
This document has been prepared as a public service . Any and all trademarks
and logotypes used herein are the property of their owners.
It is our intent to provide this document in accordance with the stipulations with respect
to "fair use" as delineated in Copyrights - Chapter 1: Subject Matter and
Scope of Copyright; Sec. 107. Limitations on exclusive rights: Fair Use.
Public access to copy of this document is provided on the website of Cornell Law School
(http://www4.law.cornell.edu/uscode/17/107.html
Notwithstanding the provisions of sections 106 and 106A, the fair use of a copyrighted work, including
such use by reproduction in copies or phonorecords or by any other means specified by that section, for pur-
poses such as criticism, comment, news reporting, teaching (including multiple copies for classroom use),
scholarship, or research, is not an infringement of copyright. In determining whether the use made of a work
in any particular case is a fair use the factors to be considered shall include:
1 - the purpose and character of the use, including whether such use is of a
commercial nature or is for nonprofit educational purposes;
2 - the nature of the copyrighted work;
3 - the amount and substantiality of the portion used in relation to the copy
righted work as a whole; and
4 - the effect of the use upon the potential market for or value of the copy-
righted work.
The fact that a work is unpublished shall not itself bar a finding of fair use if such finding is made upon
consideration of all the above factors
Web:
https: // www. pearl - hifi . com
E-mail:
sales@ pearl - hifi . com
To view our item listings on eBay,
Sec. 107. - Limitations on exclusive rights: Fair Use
PDF Cover Page
1 - 94 Broadway St. West, Nakusp, BC V0G 1R0
Land: + 403.244.4434
Engineering and Intuition Serving the Soul of Music
logotype above are "live"
EARL
click here.
) and in part is reproduced below:
Mobile: + 587.578.4434
click here.

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the FW168HR and is the answer not in the manual?

Questions and answers

Summarization of Contents

Main features
HYPERBOLIC PARABOLOIDAL DIAPHRAGM
Details the world's first HP structure in near field monitors for increased responsiveness and resonance-free operation.
UFLC DIAPHRAGM SOFT DOME TWEETER
High fidelity soft dome tweeter using UFLC for extended frequency response and reproduction.
Key Component Technologies
NEWLY DESIGNED BASS REFLEX SYSTEM
Describes the bass reflex system design, focusing on active utilization of internal HP reflectors for enhanced bass response.
SOFT DOME HF UNIT
Details the UFLC soft dome tweeter, its benefits, and weight reduction for improved frequency response.
ENCLOSURES
Discusses acoustically designed enclosures to minimize vibrations and unwanted reflections for optimal sound.
PROFESSIONAL Specifications
NOTICE: UNIQUE TECHNOLOGIES
Highlights unique technologies for which patents are pending, emphasizing advancements in speaker design.
Main features
HYPERBOLIC PARABOLOIDAL DIAPHRAGM
Details the world's first HP structure in near field monitors for increased responsiveness and resonance-free operation.
UFLC DIAPHRAGM SOFT DOME TWEETER
High fidelity soft dome tweeter using UFLC for extended frequency response and reproduction.
FEATURES
THE "SHOULD BE" OF MONITOR
Outlines the five mandatory requirements for near-field monitors to achieve optimal sound analysis and reproduction.
REQUIREMENTS OF SPEAKER DRIVERS
Lists essential criteria for speaker drivers, including frequency range, response, resolution, and input capability.
REQUIREMENTS OF SPEAKER ENCLOSURES
Details necessary enclosure characteristics such as size, time alignment, natural resonance, and sound field presence.
BASICS OF THE HP SYSTEM
APPLICATION TO DIAPHRAGMS OF THE HP SYSTEM
Explains the application of HP diaphragms to loudspeakers, focusing on their structural benefits and acoustic advantages.
FEATURES OF THE WOOFER UNIT
1) Configuration of HP diaphragms
Describes the configuration of HP diaphragms, including stress dispersion and optimal frequency response through FEM analysis.
2) Properties required of diaphragm materials
Outlines key properties for diaphragm materials, including propagation speed, flexural rigidity, and internal loss.
FEATURES OF THE TWEETER UNIT
6) Voice coil
Details the voice coil specifications, including its large diameter and the use of hard duralumin for heat resistance and sound transiency.
7) Die-cast aluminum frame
Explains the use of die-cast aluminum frames for tweeter units, highlighting benefits like smaller magnetic leakage and heat dissipation.
FEATURES OF THE ENCLOSURE
1) Driver arrangement oriented for time alignment
Discusses driver placement for optimal phase characteristics and time alignment, emphasizing upright positioning.
2) Board thickness
Explains the importance of 21mm thick MDF material for enclosure rigidity and strength, particularly for the front baffle.
3) Sound absorbent materials
Addresses problems with conventional sound absorbent materials, such as loss of dynamism and frequency-dependent coloring.
4) Introduction of HP sound reflectors
Introduces HP sound reflectors designed to prevent standing waves within enclosures for more natural sound.
NETWORKS AND CONNECTIONS
5) Factors required of HP sound reflectors
Details the necessary factors for HP sound reflectors, focusing on their curved surface properties and material strength.
6)New bass-reflex system
Describes the adoption of bass-reflex enclosures for dynamism and massiveness, utilizing interior HP sound reflectors.
FEATURES OF NETWORKS AND CONNECTIONS
Covers network design for woofers and tweeters and the benefits of bi-wiring for optimal speaker driving.
Owner's Manual
Introduction
Provides an overview of the NF-1 speaker system, highlighting its advanced features for accurate audio analysis and reproduction.
Safety Precautions
Lists critical safety guidelines for using the NF-1 speaker system, including warnings about water, heat, and electrical shock.
Main features of NF-1
Particulars of each component
Details the individual components of the NF-1, including HP diaphragms, UFLC diaphragms, HP sound reflectors, and UDR tangential edges.
HP diaphragm
Explains the hyperbolic paraboloid structure of the HP diaphragm and its material composition for optimal performance.
UFLC diaphragm
Details the UFLC diaphragm for tweeters, emphasizing high fidelity sound reproduction and extended high frequencies.
HP sound reflector
Describes HP sound reflectors used inside enclosures to diffuse sound and prevent standing waves for natural attenuation.
UDR tangential edge
Explains the UDR tangential edge structure, its configuration, and its role in optimizing diaphragm edges for performance.
Speaker Connection Systems
Bi-wiring/bi-amplifier system terminals
Details the 4-terminal system for bi-wiring/bi-amplification, enabling independent connections for optimal driving capability.
Installation notes
Provides guidance on optimal speaker placement for time alignment and listening position, recommending upright use.
Optimal listening points and setting
Maintenance precaution
Offers advice on cleaning speaker surfaces and enclosures, warning against direct contact with diaphragms and use of solvents.
SAFETY INSTRUCTIONS
CAUTION
Lists critical safety guidelines for using the NF-1 speaker system, including warnings about water, heat, and electrical shock.
NF-1 Specifications
2-way bass-reflex system
Describes the enclosure type as a 2-way bass-reflex system with specific driver units and frequency response.
160 mm HP woofer x 1 (low-leakage type)
Details the 160mm HP woofer unit, noting its low-leakage type for reduced magnetic interference.
20 mm Soft-Dome tweeter x 1 (low-leakage type)
Details the 20mm soft-dome tweeter unit, also featuring a low-leakage type for reduced magnetic interference.
NF-1A System Overview
Speakers
Lists speaker unit details, including impedance, drivers, frequency response, and enclosure type for the NF-1A.
AMPLIFIER SECTION
Details the amplifier section of the NF-1A, including output power, input terminals, and control features.
PHYSICAL
Provides physical specifications for the NF-1A, including dimensions, weight, and power consumption.
CONTROLS, INDICATORS & CONNECTORS
NF-1A Controls
Details the various controls on the NF-1A, including Power LED, Heat sink, Loudness, Tweeter Level, and Filters.
EXPLODED VIEW, PCB ASSEMBLY AND PARTS LIST
NF-1 OVERALL EXPLODED VIEW & PARTS LIST
Provides a detailed exploded view and parts list for the NF-1 loudspeaker system components.
NF-1A EXPLODED VIEW (Speaker & Enclosure Section)
NF-1A OVERALL EXPLODED VIEW (Amplifier Section)
Provides a detailed exploded view of the amplifier section for the NF-1A, including component placement.
NF-1A PCB Layouts
• Parts side of Input PCB assy
Shows the component layout for the Input PCB assembly of the NF-1A.
• Foil side of Input PCB assy
Displays the foil side layout of the Input PCB assembly for the NF-1A.
NF-1A PCB Pattern Drawing
• Parts side of Power Amp PCB assy
Illustrates the component layout on the parts side of the Power Amp PCB assembly for NF-1A.
• Foil side of Power Amp PCB assy
Shows the foil side layout of the Power Amp PCB assembly for the NF-1A.
NX Series Overview
NX Series Powered Nearfield Monitors
Introduces the NX Series powered nearfield monitors, highlighting their professional sound quality and application.
Product Descriptions
Electrics
Details the electrical specifications of NX Series monitors, including bi-amplification, heatsinking, and input options.
NX-6A Monitor Features
Features of the NX-6A monitor, including its 160mm woofer, UDR technology, and overall design for studio use.
NX-5A Monitor Features
Features of the NX-5A monitor, emphasizing its compact size, clarity, and precision for nearfield monitoring.
NX-6A Specifications
SPEAKER SECTION
Lists speaker specifications for the NX-6A, including impedance, driver units, and frequency response.
AMPLIFIER SECTION
Details amplifier specifications for the NX-6A, covering output, input types, controls, and power.
PHYSICAL
Provides physical characteristics of the NX-6A, such as dimensions, weight, and power consumption.
NX-5A Specifications
SPEAKER SECTION
Lists speaker specifications for the NX-5A, including impedance, driver units, and frequency response.
AMPLIFIER SECTION
Details amplifier specifications for the NX-5A, covering output, input types, controls, and power.
PHYSICAL
Provides physical characteristics of the NX-5A, such as dimensions, weight, and power consumption.
United States Patent [19]
[54] LOUDSPEAKER
Identifies the invention as a loudspeaker, likely the subject of the patent.
[30] Foreign Application Priority Data
Lists priority data for foreign applications related to the patent.
[57] ABSTRACT
Summarizes the invention, focusing on a loudspeaker diaphragm with a unique edge structure for improved performance.
LOUDSPEAKER
1. Field of the Invention
States the field of the invention, relating to loudspeakers and diaphragms.
2. Description of the Prior Art
Discusses existing loudspeaker technology and the problems associated with conventional diaphragms.
SUMMARY OF THE INVENTION
Presents the object and summary of the invention, focusing on diaphragm design for sound quality.
BRIEF DESCRIPTION OF THE DRAWINGS
Lists the figures and their descriptions provided in the patent document.
United States Patent [19]
[57] ABSTRACT
Summarizes the invention, focusing on a diaphragm with alternately up-rolled and down-rolled portions for improved sound quality.
ELECTROACOUSTIC TRANSDUCER
BACKGROUND OF THE INVENTION
Discusses the background of electroacoustic transducers, focusing on diaphragm edge technology.
DESCRIPTION OF RELATED ART
Reviews existing loudspeaker technology and problems related to diaphragm edge construction and magnetic flux.
SUMMARY OF THE INVENTION
States the object of the invention: to provide a transducer with a diaphragm edge that restrains vibratory force unbalance.
United States Patent [19]
[57] ABSTRACT
Describes a damper for loudspeakers featuring tubular knitted tinsel cords bonded to a corrugated body for improved flexibility and reliability.
DAMPER FOR LOUDSPEAKER AND METHOD FOR MANUFACTURING SAME
TECHNICAL FIELD OF THE INVENTION
States the technical field of the invention, focusing on dampers for loudspeakers with conductive tinsel cords.
DESCRIPTION OF RELATED ART
Discusses prior art dampers, their manufacturing complexities, and problems with tinsel cord integration.
BRIEF DESCRIPTION OF THE DRAWINGS
Lists the figures associated with the damper and its manufacturing method.
DESCRIPTION OF PREFERRED EMBODIMENTS
Details the preferred embodiments of the loudspeaker damper, explaining its construction and manufacturing process.

Table of Contents