1
1 OVERVIEW
1.1
Features and Capabilities
The Mackenzie MacFi system is the most cost effective series of solid state digital
audio record / playback systems available to the industry. Backed by Mackenzie’s
years of system design experience, MacFi offers a great deal of functionality in a
compact and inexpensive package.
The MacFi retrieves stored audio data from non-volatile flash memory, eliminating
the need for battery backup, and delivers superb sound quality.
The MacFi is offered in either 8 or 16 minute versions and supports up to 6.5kHz
bandwidth and 60 dB of dynamic range. System capacity is 8 randomly and instantly
accessible messages. Dynamic Message Length (DML) technology has been
incorporated in the MacFi allowing each of the messages to be of different duration.
DML also provides for replacement messages to be a different length than the
original, maximizing memory efficiency and compatibility with future applications.
Messages are user recordable via microphone or line input and straight forward
user interface located directly on the unit. Simple parallel controls for the 8
messages are available on terminal connectors. Record and Stop inputs and a Play
relay output are also accessible via terminals.
The MacFi offers several different playback modes to accommodate different
applications. Play/repeat, Play once per closure, Play while active, and Retrigger
allow the MacFi to be used with existing on site control circuitry. Message repetition
and delay between messages are user selectable as well.
The space saving built-in 4 watt power amplifier is perfect for most direct to
speaker applications as it eliminates the need for additional hardware.
The MacFi’s small size, industrial construction and the absence of moving parts
make it ideal for automatic unattended operation, especially in harsh environmental
or mobile conditions. An optional 1U rack mount adapter is also available.
1.2
General Specifications
Audio Quality:
Performance:
12 bit
Sample Rate:
16kHz
Encoding:
ADPCM
Dynamic Range:
60dB
Signal to Noise:
60dB
Frequency Resp.:
100Hz to 6.5kHz
THD:
<1%
