About Mark & Daniel®
• M&D News
• M&D Phylosophy
• M&D Speaker Manual
◎ Hi-Fi Products
• Fantasia Sound Systems
- Lady-Shanghai Speaker
- Fantasia-Cello Speaker
- Fantasia-S Speaker
• Ultrumax Series
- Ultrumax-U1 Speakers
- Ultrumax-U2 Speakers
- Ultrumax-U2-ST
- Ultrumax-M1 Monitor
- Ultrumax-M1-ST
- Ultrumax-M2-ST
- Ultrumax-Center
- Ultrumax-Sub-Ia
- Ultrumax-Sub-IIa
- Ultrumax-Sub-IIph
- Ultrumax-Sub-IIPs
- Ultrumax-Stand
• Maximus Speakers
- Maximus-Monitor-Mk2
- Maximus-Ruby-Mk2
- Maximus-Mini-Monitor
- Maximus-Mini
• Apollo Sound Systems
- Apollo-II Speaker
- Apollo-Center Speaker
• Muse series Speakers
- Muse-IIa Floorstander
- Muse-III-Mk2 Speaker
- Muse-Center-Mk2
- Muse-Inwall-I Speaker
- Muse-Inwall-II Speaker
• Powered Speakers
- Maximus-Opal-Mk2
• Other M&D Products
- Omni-Harmonizer
- Maximus-Stand-I
- Maximus-Stand-II
- Maximus-Wallset
• FAQ
• Discontinued Products
- Maximus-Monitor
- Maximus-Sapphire
- Maximus-Topaz
- Muse-Ia Floorstander
- Muse-Sub Speaker
- A-400 Amplifier
- Arch-3/4 Audio Racks
- Maximus-Monitor+
- Maximus-Diamond+
- Maximus-Ruby
- Maximus-Mini+
- Aragorn Sound System
- Maximus-Stand-dir
- External Crossovers
- Speaker Switch Box
- Muse-III Fllorstander
- Muse-Mini+ Floorstander
- Muse-Center-a Speaker
- Maximus-Opal-air4
- Apollo-I floorstander
◎ M&D Drivers
• Dreams AMT Driver
- DM-1 Dreams AMT Driver
- DM-2 AMT Super Tweeter
- DM-3 Dreams AMT Driver
- DM-4 Dreams AMT Driver
- DM-5 Dreams AMT Driver
- DM-6 AMT Driver
- DM-7 AMT Driver
- DM-8 Ultra AMT Driver
- DM-9 Ultra AMT Driver
• Super Xmax Woofer
- SX4.0 Woofers
- SX5.5 Woofers
- SX6.5 Woofers
- SX8.0 Woofers
- SX10 Woofers
- HX5.5 Woofer
- HX6.5 Woofer
◎ Award and Review
• Ultrumax Speakers
• Maximus-Monitors
• Ruby/Sapphire/Diamond
• Maximus-Minis
• Fantasia Sound Systems
• Apollo Sound Systems
• Aragorn Sound System
• Muse series Speakers
• Omni-Harmonizer
• Other M&D Products
• Award & Certificate
◎ Contact US
• M&D® Office
• M&D on-line Service
  
  

 

 

800Hz to 4 KHz the Essence of True Hi-Fi

 

 

            A few examinations the entire spectrum of human hearing research have proven, time and again, that people are most responsive and sensitive to the mid-range frequencies from about 800Hz to 4 KHz band.  This means that for true hi-fi sound reproduction, this mid-range band should never be impaired as possible. Therefore:
 
 For hi-fi speaker systems, a single driver capable of covering the complete frequency range from 800Hz to 4 KHz is essential.
 
 Avoiding any crossover point within this mid-range band is necessary to avoid sound quality impairment by different drivers.
 
 A flat frequency response with even dispersion and phase characteristics in this range is also important to keep the sound integrity. 


frequency response-m.png

 
            To properly implement these requirements for a two-way speaker system, we need to either find an wideband tweeter that is capable of covering the spectrum from 800Hz to 20KHz (to cover about 5 octaves), or to build an unique woofer that may satisfactorily respond from 40Hz up to 4KHz (for over 6 octaves).  Due to many physical and fabricating limitations, there are only a handful of such drivers available at very high cost which may be meet these critical targets.  Most speaker manufacturers today have no choice but to compromise their 2-way speakers by selecting a crossover point within this very sensitive Mid Frequency band (typically, inserted somewhere between 1.5KHz to 3.5KHz).
 
            This unfortunate audio engineering compromise is suddenly a relic of the past, for now Mark & Daniel has created the wideband Dreams AMT driver!!

 

 

 

 

 

 

[ BACK ]

 

 


  
  

Mark & Daniel Audio Labs, Copyright © All Rights Reserved. since 2004

沪ICP备15020394号-1