Costas
New member
Cadence Q4000, very good condition in box/manuals/sticker, $100;
Cadence Q4000 4-channel car amplifier
4 Ohm Stereo Power
2 Ohm Stereo Power
4 Ohm Bridged Power
Frequency Response
Signal/Noise Ratio
Damping Factor
Minimum THD
Channel Separation
Input Voltage
Dimensions 4 x 60 Watts
4 x 100 Watts
2 x 200 Watts
20Hz - 30KHz
>100dB
> 200 @ 100 Hz
<0.05%
>65dB
150mV - 5 Volt
12”x10.75”x2.4” (LxW
All the terminals on the amplifier 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 16 gauge wire. When wiring the
amplifier, be sure to strip just enough wire that fits into the terminal so that bare wires do not
touch each other, or the amplifier chassis and cause a short circuit.
A narrow "Q" shelving equalization circuit is included in the amplifiers. The equalization
system is preset at 45Hz. The boost control allows you to add up to 12dB 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 12dB of gain to low
excursion 8" and 10" Subwoofers .
Cadence Q Series amplifiers 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 amplifier 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.
The audio output section of the Q Series amplifiers feature Japanese studio grade, high
current BiPolar audio transistors. Unlike other manufacturers who use a host of different type
transistors, not originally designed for audio output, ie: 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. These transistors were designed and engineered
to produce music. That’s why Cadence amplifiers sound better. They are cleaner with lower
distortion, higher current capable and more reliable. We challenge you to test listen a
Cadence amplifier and hear the difference yourself.
Q Series amplifiers feature our unique IC controlled protection circuitry. This sophisticated
circuit constantly monitors the heatsink internal temperature and various voltages, adjusting
the amp automatically and protecting it from dangerous conditions. The 2 LEDs located on
the input side of the amplifier provide indication of the amplifier status, the Power LED will
light when the amplifier is receiving proper power, ground and remote voltages and the IC
monitoring sequence indicates the amp is functional. In case the amplifier encounters a
diagnostic condition as listed below, the second LED will light indicating a Diagnostic
condition. When a diagnostic condition is sensed the amplifier will then turn into a self
preservation mode and if the cause of the diagnostic condition is not corrected will eventually
shut off. There are certain critical diagnostic conditions which will turn the amplifier off
immediately.
1. Speaker short circuit.
2. Input Overload.
3. Thermal overload.
4. Reverse Polarity.
To reset the amplifier, you must first diagnose what caused the problem, correct the fault and
restart the system. See the Trouble Shooting page for further details.
The Q Series amplifiers feature an anti-thump, mute and delay circuit. This eliminates
irritating and speaker damaging turn-on and turn-off transients normally experienced with
less expensive amplifiers.
Cadence Q4000 4-channel car amplifier
4 Ohm Stereo Power
2 Ohm Stereo Power
4 Ohm Bridged Power
Frequency Response
Signal/Noise Ratio
Damping Factor
Minimum THD
Channel Separation
Input Voltage
Dimensions 4 x 60 Watts
4 x 100 Watts
2 x 200 Watts
20Hz - 30KHz
>100dB
> 200 @ 100 Hz
<0.05%
>65dB
150mV - 5 Volt
12”x10.75”x2.4” (LxW
All the terminals on the amplifier 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 16 gauge wire. When wiring the
amplifier, be sure to strip just enough wire that fits into the terminal so that bare wires do not
touch each other, or the amplifier chassis and cause a short circuit.
A narrow "Q" shelving equalization circuit is included in the amplifiers. The equalization
system is preset at 45Hz. The boost control allows you to add up to 12dB 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 12dB of gain to low
excursion 8" and 10" Subwoofers .
Cadence Q Series amplifiers 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 amplifier 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.
The audio output section of the Q Series amplifiers feature Japanese studio grade, high
current BiPolar audio transistors. Unlike other manufacturers who use a host of different type
transistors, not originally designed for audio output, ie: 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. These transistors were designed and engineered
to produce music. That’s why Cadence amplifiers sound better. They are cleaner with lower
distortion, higher current capable and more reliable. We challenge you to test listen a
Cadence amplifier and hear the difference yourself.
Q Series amplifiers feature our unique IC controlled protection circuitry. This sophisticated
circuit constantly monitors the heatsink internal temperature and various voltages, adjusting
the amp automatically and protecting it from dangerous conditions. The 2 LEDs located on
the input side of the amplifier provide indication of the amplifier status, the Power LED will
light when the amplifier is receiving proper power, ground and remote voltages and the IC
monitoring sequence indicates the amp is functional. In case the amplifier encounters a
diagnostic condition as listed below, the second LED will light indicating a Diagnostic
condition. When a diagnostic condition is sensed the amplifier will then turn into a self
preservation mode and if the cause of the diagnostic condition is not corrected will eventually
shut off. There are certain critical diagnostic conditions which will turn the amplifier off
immediately.
1. Speaker short circuit.
2. Input Overload.
3. Thermal overload.
4. Reverse Polarity.
To reset the amplifier, you must first diagnose what caused the problem, correct the fault and
restart the system. See the Trouble Shooting page for further details.
The Q Series amplifiers feature an anti-thump, mute and delay circuit. This eliminates
irritating and speaker damaging turn-on and turn-off transients normally experienced with
less expensive amplifiers.
