About Mark & Daniel®
• M&D News
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Hi-Fi Products
• Fantasia Sound Systems
- Fantasia-Cello Speaker
- Fantasia-S Speaker
• Apollo Sound Systems
- Apollo-I Speaker
- Apollo-II Speaker
- Apollo-Center Speaker
• Aragorn Sound System
- Aragorn-Monitor+
- Bass Extender
- Omni-Harmonizer
• Muse series Speakers
- Muse-Center-a Speaker
- Muse-IIa Floorstander
- Muse-III Floorstander
- Muse-Mini+ Floorstander
• Maximus Speakers
- Maximus-Monitor-MKII
- Maximus-Ruby-MKII
- Maximus-Mini-Monitor
- Maximus-Mini
• Wireless Sound System
- Maximus-Opal-air4
• Speakers Color Option
- Standard Color
- Special Color
- Custom Made
• Other M&D Products
- Omni-Harmonizer
- Maximus-Stand-I
- Maximus-Stand-II
- Maximus-Stand-dir
- Speakers Switch Box
- External Crossovers
- Maximus-Wallset
• 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+
M&D Drivers
• Dreams AMT Driver
- DM-1a AMT Driver
- DM-2b AMT Super Tweeter
- DM-3a AMT Driver
- DM-4 AMT Driver
- DM-4a AMT Driver
- DM-5a AMT Driver
- DM-6b AMT Driver
- DM-7b 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
• Fantasia Sound Systems
• Maximus-Monitors
• Ruby/Sapphire/Diamond
• Maximus-Minis
• The Wireless Speaker
• Apollo Sound Systems
• Aragorn Sound System
• Muse series Speakers
• Omni-Harmonizer
• Other M&D Products
• Award & Certificate
Contact US
• M&D® Office
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800Hz to 4 KHz C 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.
            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!!
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