Carver CV1501, CV2501, CV1502, CV2502, CV4002 Operational Manual

CV Series

User Manual

User Manual

User ManualUser Manual

This User Manual is made available in Adobe Acrobat format.

In order to view the manual and utilize it’s enhancements we

recommend that you download Adobe Acrobat Reader® 4.0 or

greater. If you do not currently have this viewer installed on your

computer, or you have an older version the reader is available

as a free download at http://www.adobe.com.

By going to the table of contents you can directly access any

topic outlined there, by simply clicking on the topic.

i

ON Media is a registered trademark of Carver Professional, A Phoenix Gold International Company

AMX, PANJA and Crestron are the registered trademarks of their respective owners.

© Phoenix Gold International, Inc. February 2001

Rev 04.08.021 - 1 –

4. Remote Level

The Remote Level Connector is used to connect a Remote Level Control to the
CV Series amplifier. The connector is a Euro Style connector with the following
connection points, from left to right. (See Figure 5)

RTN – Return, CV2 – Control Voltage for Channel 2 on Dual Channel models,

CV1 – Control Voltage for Channel 1, and +5V volt send from the VCA package.
More information on how to connect this feature is available later in this manual

5. Standard Input Module

A Standard Input Module is included with each CV Series amplifier. The Standard Input Module allows
the use of a balanced or unbalanced line level input via a panel mounted female XLR connector or a
three pin Euro Style connector. The sensitivity of the input is adjustable with a jumper selection on the
input card PCB at either a .775V

RMS

or 1.5V

input level. An additional jumper selection is available to

RMS

select Bridged Mono mode, Normal Dual Channel input mode or Parallel Mono input mode. (See
Appendix B) In the Bridged and Parallel input mode, a single input will drive both channels on a dual
channel amplifier. Both a Single channel (MSSI) and Dual channel (MSDI) input cards are available and
are provide with the appropriate CV Series amplifier.

Caution! Before removing the input module for any reason, make certain that the amplifier’s AC mains
are first switched OFF or disconnected.

6. XLR Connector

Female XLR connectors are provided on Standard Input Modules to receive Balanced or Unbalanced line
level input signals. Pin 2 is (+) hot, Pin 3 is (-) negative and Pin 1 is chassis ground. To use the XLR for
an unbalanced input signal, connect the (+) signal to Pin 2, and the shield to Pin 1 with a jumper from Pin
1 to Pin 3.

7. Euro Connector
A three-pin Euro Style connector is provided on the Standard Input Module to receive a Balanced or
Unbalanced line level input signal. Counting from left to right, Pin 1 is (+), Pin 2 is (-) and Pin 3 is chassis
ground. For an unbalanced input signal connect pin 1 to (+), Pin 2 to the Shield and connect a jumper
from Pin 3 to Pin 2.

8. AC Line Cord Receptacle

An IEC type AC line cord receptacle is provided to receive the line cord included with the CV Series

amplifier. An appropriate line cord termination is provided based on the country of destination with each

Figure 6

Figure 5

Rev 04.08.021 - 13 –

CV Series amplifier. If your application requires rack mounting, optional line cords, shorter than the
standard 2 meter, are available as accessory item for the CV Series amplifiers.

9. Configuration DIP Switches

Each CV Amplifier channel can be individually configured via the DIP
Switches on the rear panel. The switches for each channel perform the
following functions from left to right:
Switch 1 - Effects In/Out (up is IN and down is OUT) this switch enables
the receive pins (+ and -) on the Effects Loop connector. When using the
Effects Loop for outboard signal processing this switch must be in the UP
(EFX IN) position.

Note: If the EFX Loop is switched (IN) with no signal present at the
EFX receive inputs, the amplifier will appear to not be working

Switch 2 – Clip Limiter (up is ON and down is OFF) The Clip Limiter prevents the
amplifier from being accidentally driven into hard clipping under normal operation. (Note: The Clip Limiter
will not protect the amplifier from clipped signals that are introduced at the amplifier input.)
Switch 3 – High Pass Filter (up is ON and down is OFF) This switch engages or disengages the internal
High Pass filter.
Switch 4 – Frequency Selection (up is 120Hz and down is 80Hz) this switch selects the frequency of the
High Pass filter. (Note: whenever the High Pass filter is disengaged a 26Hz
is engaged)

10. Effects Loop

A four pin Euro Style connector is provided for an unbalanced Effects Loop send and receive. The Input
Overload of this feature is set at 20dBu. This Effects Loop can be used to send and receive unbalanced
signals from outboard signal processing equipment such as EQ’s, Delays, Limiters and others. For the
Effects Loop receive signal, the
EFX IN Switch on the configuration DIP Switch must be set to the (IN or up) position for that channel or
zone. The Send pins (+ and -) are always engaged and can be used to loop signal from one amp to
another via the receiving amplifiers input module. (Note: The signal at the Send Pins of the Effects Loop

are post any signal processing performed by a optional input module that may be in use in the CV Series
amplifier). Connections to the Effects Loop are intended to be local, and signals sent over long wire runs

are not recommended. Input through the “Input Module” would perform better in this circumstance.

(See figure 7)

Figure 7

factory preset

high pass filter

Installation

Location and General Precaution

Observe the following precautions when choosing a location for your amplifier.

A. Do not expose the unit to rain or moisture. If a fluid or foreign object should enter the unit, disconnect

the power plug and contact the Carver Professional Service Center. Do not pull out the plug by
pulling on the cord; grasp the plug firmly and pull.

B. Protect the amplifier from heat, and allow adequate ventilation. Place away from sources of heat,

such as heating vents and radiators. All components produce some heat during operation, so make
sure that the ventilation area above and below the heatsink are not covered and that air is allowed to
circulate freely around the unit. Excessive heat is the single greatest source of both short-term and
long-term component failure.

Mechanical Considerations

When being rack mounted, the CV1501, CV2501, CV1502 and the CV2502 are 2U or 3.5” (89mm) in
height, The CV4002 is 3U or 5.25” (133mm) and they are all 17.25” (438mm) in depth inside the rack
including the rear supports. Secure the unit to the rack mechanically using four screws. The addition of
plastic or rubber washers prevents marring the front panel, but may interfere with grounding.

Rear Support

If the CV Series amplifiers are rack mounted and the rack is to be transported, mechanical support for the
rear of the amplifier(s) is required. This could take the form of any mechanical means of tying the

Rev 04.08.021 - 14 –

amplifier’s chassis structure to the rear of the rack during transportation. This practice is recommended
for all electronic components.

Thermal Considerations

When the CV Series amplifiers are used free standing, no thermal considerations are necessary other
than using the four rubber feet supplied with the amplifier. This raises the amplifier above the surface it is
sitting on enough to allow free movement of air through the heatsink located along the left side of the
amplifier.

Note! When several of the CV Series amplifiers are mounted together in a rack, it may be

necessary to provide openings at both the top and bottom of the rack to allow convection to
exchange the heated air at the top of the rack with cool air from the bottom. A minimum space of 1U
should be left between CV Series amplifiers at no more than a 12U interval. This should allow sufficient
cooling of the amplifiers. If the CV Series amplifiers are mixed with other devices, caution should be
taken to locate the CV Series amplifiers together, facilitating the chimney effect of their heatsink design.
Space should be left above and below the CV Series product, grouped together in the rack, for proper
airflow. Additionally, if the CV Series amplifiers are used with other amplifiers, caution must be taken to
ensure the heat forced into the rack from other amplifiers does not interfere with the ventilation of the CV
Series amplifiers.

AC Power Considerations

Ensure that the CV Series amplifier is plugged into an outlet capable of supplying the correct voltage
specified for the model and enough current to allow full-power operation of all the amplifiers utilizing that
circuit. The current demand of a power amplifier varies depending on several factors, including the
impedance of the load, the output level of the amplifier, and the crest factor and duty cycle of the program
material. Under typical conditions reproducing contemporary music, with all channels driven into a four­ohm load to the point where the peaks are just at the clipping point, the amplifiers require the following
average currents: Psuedo Pink Noise @ 1/3 rated power into 4 ohm autoformer winding.
(See Table 1 below) For full power consumption specifications (See Appendix A)

Model 100VAC (50/60 Hz) 120VAC (60Hz) 230VAC (50Hz)

CV1501 101 Watts / 1.35 Amps 101 Watts / 1.13 Amps 101 Watts / 588 mA
CV2501 148 Watts / 2.06 Amps 153 Watts / 1.75 Amps 153 Watts / 1.09 Amps
CV1502 172 Watts / 2.35 Amps 180 Watts / 1.89 Amps 179 Watts /1.28 Amps
CV2502 285 Watts / 3.7 Amps 308 Watts / 3.3 Amps 289 Watts / 1.69 Amps
CV4002 448 Watts / 4.92 Amps

Magnetic Leakage Consideration

The CV Series amplifiers may be mounted without concern for magnetic flux leakage, within the confines
of common sense. For example, it is not good practice to mount any power amplifier near a microphone
input transformer or magnetic storage media.

Input Wiring

The CV Series amplifiers are furnished with a Standard Input Module that allows a line level input, either
balanced or unbalanced. The input connectors on the Standard Input Module are a female XLR and a
3-pin Euro Style connector. These connectors are paired for each channel of the amplifier and are wired
together in parallel.
XLR Connector – Pin 2 is + (hot), Pin 3 is – (negative), and Pin 1 is Chassis Ground. To use this
connector with an unbalanced input Pin 2 is + (hot), Pin 1 is Ground, and Pin 3 should be jumpered to
Pin 1.
Euro Style Connector- From Left to Right Pin 1 is + (hot), Pin 2 is – (negative), and Pin 3 is Chassis
Ground. To use this connector with an unbalanced input; Pin 1 is + (hot), Pin 3 is Ground, and Pin 2
should be jumpered to Pin 3.

Rev 04.08.021 - 15 –

Table 1

Another input to the CV Series amplifiers is provided via the EFX Loop’s RCV (receive) input. This input
is only available when the FX Loop is enabled on the DIP switch located on the rear of the amplifier. This
input is designed for unbalanced line level input only, and should only be used with equipment that is
local to the CV amplifier or rack containing the CV amplifier, such as, an outboard signal processing
device or the SND output from the FX Loop on the same or another (local) CV amplifier. This input offers
low Common Mode Rejection and should not be used for signals from units more than a few feet away, in
order to maintain low noise levels.

Input Sensitivity

The input sensitivity of the CV Series amplifiers is factory preset at 0dBu or 0.775V
amplifier to full rated output. Individual modules for the CV Series amplifiers may allow the user to select
other settings based on the input source. (See Appendix B)

Loudspeaker Polarity

Loudspeakers or the distributed lines containing the step-down transformers must be connected with
consistent polarity for correct phasing between them. Incorrect phasing will do no physical harm, but
frequency response will be adversely affected. The key is to make sure that both speakers, or all
transformers are connected to the output terminals in the same manner. Connect the (+) positive to the
appropriate output connection such as 4, 8, 25V, 35V, 50V, 70V or 100V. Next be certain that the (-)
negative is connected to the correct (Com) or common terminal.

(Note! The low impedance 4 and 8 ohm outputs have a separate common terminal from the distributed

voltage outputs. Facing the rear of the amplifier, the (Com) Common for the low impedance
outputs is on the extreme left of each output connector. The (Com) Common for the distributed
voltages is located on the extreme right of each output connector.)

Mono Operation

Mono operation of the CV Series Dual Channel amplifiers can be accomplished in two ways: Parallel
Mono and Bridged Mono.

Parallel Mono is achieved by driving both channels with a single input. In the parallel mono mode, the
power of both channels can be considered as the total power, however the power is divided into two
zones.

In the bridged mono mode the two channels are combined to form one mono channel of greater power.
One channel of input is fed to both channels via a circuit that inverts the input to one of the channels so
that one channel reproduces the positive half of the input waveform and the other channel reproduces the
negative half of the input waveform. In the bridged mode each channel sees one half of the total
impedance. It is, therefore, not recommended

Parallel Mono – Use the Channel 2 input. In the parallel mono mode the channel 1 input is disabled.
On the input module PCB find the Bridged/Normal/Parallel mode jumpers and change it from its factory
preset “Normal” setting to the “Parallel” mono setting. (See Appendix B) By doing this you have
instructed the input module to send the channel 2 input to both channels to be used as a mono input.
Both output channels of the amplifier use a single input, and the total power of the amplifier is equal to
twice the maximum output of a single channel. However, the total power is equally divided between the
two channels or zones.
Bridged Mono - Use the Channel 2 input. In the bridged mono mode the channel 1 input is disabled.
On the input module PCB find the Bridged/Normal/Parallel mode jumper and change it from its factory
preset “Normal” setting to the “Bridged” mono setting. (See Appendix B) By doing this you have
instructed the input module to invert channel one so that it now represents the negative half of the audio
waveform. Channel 2 is now the non-inverted channel and represents the positive half of the audio
waveform. In this mode of operation each channel of the amplifier see one half of the total impedance, so
that, an 8 ohm load now looks like a 4 ohm load to each channel.

To connect the load to the amplifier you would connect the positive (+) of the load to the terminal of
channel 2 and the negative (-) of the load to the terminal of channel 1. Example: You wish to bridge the

Rev 04.08.021 - 16 –

to use a bridged load below 8 ohms.

needed to drive the

rms