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STEP 6. (6) TIME CORR. (Time Correction)
Due to the wide variety of installation and system design possibilities available, bass performance may not always
be optimized as a result of speaker placement relative to the listening position. Sound waves may not reach the
listener's ear at the same time as other speakers, especially in a multiple subwoofer configuration. Such differences
in phase can result in muddy (unclear) bass or even a complete cancellation in the frequency response. Therefore,
both the MRD-M300 and MRD-M500 are equipped with Digital Time Correction, making it possible to realign
subwoofer(s) in time. Proper use of this function will result in clear, powerful bass with a smooth transition to the
other speakers in the system. It is recommended to use the calculation formula provided in the owner's manual as a
starting point for this adjustment.
STEP 7. (7) PHASE
Phase control allows you to flip the polarity of the subwoofer without actually reversing the physical connections.
This convenient feature is useful when the subwoofer is in a position that could result in some cancellation, causing
diffused, unclear bass. It is recommended to try both settings (0 ° /180 ° ) to determine which is best for your
particular system.
STEP 8. (8) AMP SET (Amplifier ID No. /Turn-On Delay)
The Amp Set menu performs two functions. Firstly, by setting the amplifier ID number (1-8), it allows the optional
RACC (RUX-4280 Remote Amplifier Control Center) to identify each amplifier individually and in a specific order.
Secondly, it provides a variable turn-on delay that can be used to minimize inrush current in large multi-amp
systems, or to eliminate any turn-on "pop".
NOTE: If using a RUX-4280 (RACC) with more than 1 AccuClass-D amplifier, be sure to set each amplifier with a
different ID Number (1-8). Amplifiers with the same ID will cause the RACC to display "NO AMP."
STEP 9. (9) OUTPUT DISABLE
Previously known as "Safe Mode", this feature provides a simple way to safely adjust the all DSP functions with the
amplification circuit turned off, eliminating the possibility of speaker damage during setup. When set to "ON", it
literally disables the high current draw output stage of the amplifier, while leaving the input and processing
sections active. Please note that this is the only amplifier function that does not engage/disengage in real time,
but requires the remote lead to be cycled off/on for the selection to take effect. Therefore, if it is accidentally set to
"ON" during programming, there will be no output the next time the amplifier is activated. Additional uses include:
bench setup with a low current DC power supply, amp valet, tuning or troubleshooting larger multiple
amp/subwoofer systems, etc.
SETTING SAFE MODE TO "OFF"
• Press and depress the "MODE" button until you are
in mode "9" (Output Disable).
• Push "ENT" and push "ENT" again to select "9-1" (ON/OFF).
• Toggle
until "OFF" is displayed.
• Push "DISP" to exit.
Note: This setting will not take effect until the amp is
turned off and then on again.
STEP 0. (0) MEMORY
Memory Mode allows you to store all amplifier settings in an auxiliary backup memory. Once stored, additional
tweaks or adjustments can be made while retaining the ability to recall the original settings at a later time. Note:
This is simply a convenience feature, since all settings are saved in real time as adjustments are made, and will
remain even if power is lost during setup.
Typical causes for little or no output
1) Output Disable is on:
Go to Step 9 (Mode 9 on the amp) and set to "OFF", then cycle amp power.
2) Subsonic and LPF frequency selections overlap or are too close together:
3) If using RUX-4280 (RACC) remote subwoofer level is turned down :
display mode (voltage or temperature) and adjust the level control.
4) Defective or broken RCA cables):
Replace RCA connectors
5) Blown fuse:
Replace Fuse with proper value
6) Remote trigger is not active:
Check remote turn-on lead with a voltage meter
7) Bad ground or power connection:
Check and replace ground connector
START HERE
Toggle
ENT
F
I
N
I
DISP
S
H
ENT
Adjust the crossover properly
Make sure the RACC is in normal
To find out more, visit www.alpinetechcenter.com
V12 AccuClass-D
Setup Guide
For MRD-M300, MRD-M500 and MRD-M1000 Amplifiers
Congratulations on your new V12AccuClass-D
you should know about this unique amplifier that will help you optimize performance for your personal tastes or
particular application. Unlike traditional designs, the V12 AccuClass-D
internal architecture, utilizing both advanced DSP (digital signal processing) and amplification technologies. This
innovative design not only offers unparalleled tuning capability and accuracy, but also allows direct digital coupling
to the power output stage for cleanest and most powerful bass possible. As with any amplifier however, proper
setup is essential if you are to maximize your listening experience. Please read the quick explanation and setup
procedure for each feature listed on the following pages.
Important notes:
To maximize the output power from this amplifier, you must use a 2 ohm load.
•
Before adjusting the amplifier settings, set the signal source (head-unit) level to
•
minimize distortion.
It is best to utilize music that will represent your typical heavy bass listening
•
scenario when adjusting levels.
Copyright 2002 © Alpine Electronics of America, Inc.
Kukje Printing Co., Ltd 127-2 Gamjeon-dong
Sasang-gu Busan Korea
TM
amplifier purchase. Before you get started, there are a few things
TM
amplifier employs a completely digital
Rev. A-101502
Printing in Korea (S)
68P02294K79-O
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