Velocity RZA500.2 User manual

RZA500.2
2 Channel Amplifier
Features
• Features
• Full Range Class D
• Balanced Differential Input Stage
• Selectable Input Sensitivity
• DC Detect Remote Turn-On Mode
• Variable 12db Crossovers
• Bridgeable
• Large Gauge Speaker Output Terminals
• Full Chassis Heat Sink
Specifications
• 650 Watts Peak Power
• 2 x 275 Watts @ 2 Ohm RMS
• 2 x 150 Watts @ 4 Ohm RMS
• 1 x 550 Watts @ 4 Ohm RMS
• Frequency Response 20hz - 25khz
• Crossover High/Low Pass 40hz - 400hz
@ 12db
• Signal Input Range .41V - 10V Balanced
High & Low Level
• RCA Input - Yes
• Speaker Level Input - Yes (over RCA
connection)
• Efciency 87% @ Full Power
• Remote Trigger 12V or Signal Sense
Instruction Manual
Installation
Plan your amplier mounting location and wire
routing in the bike. You will need to secure the
amplier in a location that is not directly exposed
to water. The RZA 500.2 amplier is designed
for humidity and extreme outdoor temperatures
but is not designed for submersion in water.
The inside structure of a Harley fairing is not
waterproof. The fairing is designed to channel
water away from the electronics inside the
fairing. Take this into consideration when deciding
on an amplier mounting location.
Power Connections
8 Gauge cables should be used and run directly to
the battery terminals. Never ground the amplier
to the frame or any other chassis ground point.
Always fuse the amplier within 18 inches of
the battery with a 30 amp fuse and a fuse holder
that is designed for automotive/motorcycle
conditions. The fuse holder should be easily
accessible without the need for any special tools.
Never place the fuse holder in an area that will
not be accessible in an emergency.
Be sure that all power connections are secured
in a way that will not allow them to pull or vibrate
loose. Be sure that there is no exposed wire at any
of the connection points.

Installation
Take care that all cables are kept away from any
moving or hot parts of the bike.
Remote Input Connection
If using the remote input to trigger the amplier,
be sure that your remote circuit is properly
connected to other items in the system. For
example: If using a DSP the remote input of the
amplier should always be connected to the
remote output circuit of the DSP and never the
bike’s accessory or the radio’s remote output. In
the event that you experience a turn-on pop after
installation, and you are using a high level input
rst inspect your remote turn on conguration.
Then you can try switching the amplier to DC
detect mode. DC detect mode will oftentimes
cure turn-on pops because the amplier will not
turn on until after an audio signal is present.
Connect the Audio Input
The RZA500.2 is designed to accept any analog
audio signal from an aftermarket, factory radio, or
DSP.
If using a speaker-level signal you will need
to convert your speaker type connections
to an RCA type connector. We recommend
one of the may solutions available from
www.AmericanHardBag.com.
Always Flash Factory Radios
Whenever using a factory radio the radio should
always be ashed before adding aftermarket
speakers and ampliers. For more information
visit: https://www.americanhardbag.com/
pages/ultimate-harley-radio-ash-guide-for-
aftermarket-speakers-and-ampliers
Connect the Speakers
The RZA500.2 amplier is designed to drive
speakers as low as 2-ohm when in stereo mode
or a single 4-ohm speaker when in bridged mono
mode. Never connect a speaker or combination of
speakers that sum to less than 2-ohms in stereo
mode or 4-ohms in bridged mode. Never allow
any of the amplier speaker outputs to come into
contact with chassis ground or to be shorted to
each other.

Attention!
Always verify that speaker polarity is correct
before connecting the speakers to the amplier
by using a D-cell battery to activate the speaker.
This should be done at the speaker lines where
they make connection to the amplier with the
speaker lines disconnected from the amplier.
This will verify that polarity has not been
accidentally ipped in a connection elsewhere on
the bike. You should always do this no matter how
sure you are that you got all of the connections
right.
1. 12V+ Battery Power
2. Remote Turn-On Input
3. 12V- Battery Ground
Remote Input Connection
If using the remote input to trigger the amplier,
be sure that your remote circuit is properly
connected to other items in the system. For
example: If using a DSP the remote input of the
amplier should always be connected to the
remote output circuit of the DSP and never the
bike’s accessory or the radio’s remote output. In
the event that you experience a turn-on pop after
installation, and you are using a high level input
rst inspect your remote turn on conguration.
Then you can try switching the amplier to DC
detect mode. DC detect mode will oftentimes
cure turn-on pops because the amplier will not
turn on until after an audio signal is present. DC
detect mode does not work with line level signal.
Bikes without radios such as Road Kings should
use the bike’e accessory circuit to activate the
ampliers remote turn-on.
Installation

Installation
Tuning & Settings
Always make your settings in the correct order.
1. Turn the gains all of the way down
2. Set your crossovers to high pass if not using
a DSP (digital sound processor) or to at if
you are using a DSP. If using a DSP set your
crossovers in the DSP before moving forward.
3. Play test tracks to determine each speaker’s
phase, relative to all other speakers in the
system. All speakers need to be in relative
phase in order for the speaker system to
perform correctly. Due to delays caused by
all crossovers (both passive and active) there
is an 80% chance that speakers are out of
phase with eachother on a basic 4 channel
speaker system. Systems with a great number
of channels are almost certain to have one or
more pairs of speakers that are out of phase.
For free test tracks and more information
visit: https://www.americanhardbag.com/
pages/speaker-phase
4. Set equalization for all channels if you
have a DSP. If using a factory Harley radio,
equalization needs to be set with the radio at
100% volume. Use the DSP master volume to
reduce the signal to a level that the speakers
are not playing at extreme volume levels when
the radio is turned all of the way up.
5. Set amplier gain. Amplier gain is always
the last setting you make and is always set for
the specic speakers you are using. Never set
the amplier gain in an attempt to reach some
desired power level. EVER! The amplier
gain should be set so that the speakers reach
maximum mechanical excursion at about
the same time the radio reaches maximum
unclipped output. Any additional gain will only
generate more heat within the speakers and
cause burned or melted voice coils and will
result in no additional output or performance
from the speakers. For a full explanation
on procedure and to watch the video visit:
https://www.americanhardbag.com/pages/
setting-gains-by-voltage-the-correct-way
Before Making Any Settings
Connect your bike to a fully automatic car battery
charger. A fully automatic battery charger will
cycle on and off as needed automatically. Your
battery charger needs to have at least a 10 amp
capacity. 20 - 30 amps is recommended for larger
systems.
• Not a battery tender
• A fully charged battery is no good
• Do not tune the bike while it is running
It is imperative that you are able to simulate
a charge cycle while tuning your audio system.
Otherwise, gains and many other settings will be
invalid and your tune will change while riding the
bike. This is one of the top tuning mistakes.