Installation guide
2
FEATURES
343
GOLD PLATED TERMINALS:
All the terminals on the amplier are solid brass and gold plated for high conductivity and
minimum impedance loss. The power and ground terminals are extra large and capable
of accepting 4-8 gauge wire. The speaker terminals can accept 14-16 gauge wire. When
wiring the amplier, be sure to strip just enough wire that ts into the terminal so that
bare wires do not touch each other, or the amplier chassis and cause a short circuit. We
recommend using Cadence brand lug and spade connectors for optimum signal transfer.
MUTE CIRCUIT:
The ZRS Smart Series ampliers feature an anti-thump, mute and delay circuit. This
eliminates irritating speaker damaging turn-on and turn-off transients normally experienced
with less expensive ampliers.
BASS DRIVE EQUALIZATION CIRCUITRY:
A narrow “Q” shelving equalization circuit is included in the ampliers. The equalization
system is preset at 45Hz. The boost control allows you to add up to 18dB of Bass Drive
effect. Utilize the Bass Drive to tailor your bass response to your systems needs. Please
keep in mind that by adding Bass Drive you are adding stress on your speakers. Make sure
your speakers can handle the extra power output! It would be foolish to add 18dB of gain to
low excursion 8” and 10” Sub woofers or mid ranges and tweeters. It’s a sure way to blow
your speakers. The Bass Drive was designed for High Power sub woofers.
“ADR”: ACTIVE DYNAMIC REGULATION
Cadence ZRS Smart Series ampliers feature our proprietary ADR, Active Dynamic
Regulated power supplies. 100% HexFET devices are utilized in the power supply for
high speed (100KHz) switching frequencies. The power supplies are capable of supplying
the main amplier with a considerable amount of reserve voltage for peak “high demand”
situations. The ADR circuit provides full bandwidth power for authoritative bass response,
high current output into low impedance loads and increased headroom. The ADR is
supplied with power via a high speed, high temperature capacitance bank and 100% pure
copper rails on the PCB enabling fast transient response to musical demands.
“ARVA”: AUTOMATIC RAIL VOLTAGE ADJUSTMENT CIRCUITRY
Cadence ZRS Smart Series ampliers feature “ARVA” circuitry in their power supply. This
circuit constantly monitors the output stage and under high current demands will adjust
the power supply rail voltages so that enough power is available for peak situations. The
“ARVA” also improves the damping factor of the amplier when playing low impedance
mono loads. Cadence United Series ampliers have tighter sounding bass reproduction
thanks to this unique circuitry.
SUPER CLASS AB AUDIO STAGE PERFORMANCE:
The audio output section of the ZRS Smart Series ampliers feature Japanese studio
grade, high current Bi-Polar audio transistors. Unlike other manufacturers who use a
host of different type of transistors, not originally designed for audio output, i.e.: power
supply transistors, motor control transistors to produce the audio signal, (You can only
imagine what they sound like.) Cadence uses only true audio transistors in the audio
section of these ampliers. These transistors were designed and engineered to produce
music. That’s why Cadence ampliers clearly sound better. They are cleaner with lower
distortion, higher current capable and more reliable. We challenge you to test listen a
Cadence amplier and hear the difference yourself.
SUPER CLASS D FULL RANGE:
The D250.2 and D350.2 utilize our cutting edge full range class D technology. These amps
feature sound that is crystal clear and ultra smooth without the distortion or harshness
typical of full range class D designs.
CLIP LIMITER (MONOBLOCK AMPS ONLY):
When activated this feature stops your amp from going into clipping mode thus limiting
the amount distortion. This is achieved by compressing the signal coming into the amp.
For SPL applications turn limiter off. For SQL applications leave the limiter on.
BASS FOCUS:
The ZRS Smart series ampliers feature our exclusive BASS FOCUS circuitry which
works as a variable Q control. By supplying up to 7dB of boost, you can compensate for
drivers in to small an enclosure so a 10” woofer can sound like a 12” woofer and a 12”
can sound like a 15” woofer. Small dash and door speakers will also benet increasing
their power handling capabilities.
FEATURES
UPON AMPLIFIER START, THE SCREEN WILL DISPLAY THE CADENCE
NAME AND YOUR AMPLIFIER’S SPECIFIC MODEL NUMBER.
INDICATES THAT THE VOLTAGE HAS DROPPED BELOW 10.5
VOLTS AND THE AMPLIFIER HAS GONE INTO UNDER VOLTAGE
PROTECTION MODE. PLEASE INSURE THAT YOU ARE USING
PROPER GAUGE WIRE AND HAVE UPGRADED YOUR ALTERNATOR.
RUNNING YOUR SOUND SYSTEM WITH THE ENGINE OFF WILL ALSO
TRIGGER THE UNDER VOLTAGE PROTECTION MODE. START YOUR
CAR TO RESOLVE THIS PROBLEM. IF AMPLIFIER FAILS TO RESET,
CALL CADENCE.
THE OUTPUT TRANSISTORS HAVE REACHED 80°C AND AMPLIFIER
HAS GONE INTO THERMAL PROTECTION. SHUT THE AMPLIFIER
DOWN TO ALLOW AMPLIFIER TO COOL OFF. IF AMPLIFIER FAILS TO
RESET, CALL CADENCE.
OFFSET VOLTAGE WAS DETECTED AND AMPLIFIER HAS GONE INTO
DC PROTECTION MODE TO PREVENT ANY DAMAGE. DISCONNECT
ALL SPEAKERS AND SUBWOOFERS. RESET THE AMPLIFIER BY
DISCONNECTING AND RECONNECTING THE REMOTE WIRE. IF
AMPLIFIER FAILS TO RESET, CALL CADENCE.
OUTPUT SHORT CIRCUIT WAS DETECTED AND AMPLIFIER HAS
GONE INTO SHORT PROTECTION MODE TO PREVENT ANY DAMAGE.
DISCONNECT ALL SPEAKERS AND SUBWOOFERS. RESET THE
AMPLIFIER BY DISCONNECTING AND RECONNECTING THE
REMOTE WIRE. RECONNECT EACH SPEAKER ONE AT A TIME TO
DETERMINE WHICH SPEAKER CAUSED THE SHORT. IF AMPLIFIER
FAILS TO RESET, CALL CADENCE.
UNDER
VOLTAGE
THERMAL
PROTECT
DC
PROTECT
SHORT
PROTECT
+ 14.7V
CH 5 CLIPPING
23°C
DC VOLTAGE AT AMP
INTERNAL HEAT SINK
TEMPERATURE
INDICATES CHANNEL IS CLIPPING. TO RESOLVE THIS PROBLEM
LOWER THE GAIN FOR THAT CHANNEL.
INDICATES NO DISTORTION DETECTED, ALL SYSTEMS NORMAL
+ 14.7V
DISTORTION FREE
23°C
CADENCE
D100.4
SMART TECH MONITORING CIRCUITRY:
ZRS Smart Series ampliers feature our exclusive Smart Tech monitoring circuit. The system computer monitors amplier temperature, input voltage, channel
distortion with clipping, input overload, and speaker short circuit. This information is displayed on the top mounted easy to read LCD screen notifying the user
of the ampliers status at all times.