The Grommes CV-600 is a speaker level to line level converter designed to take an amplified speaker output and convert it to a usable audio signal for another amplifier, preamplifier, recording device, or other line-level equipment. It can accept balanced or unbalanced speaker-level signals from 4–8 ohm direct speaker outputs and 25V, 70V, or 100V distributed speaker lines.
The CV-600 uses an isolation transformer to electrically isolate the speaker-level input from the output, helping provide a clean and flexible way to obtain an audio signal from an existing amplifier or distributed audio system. The output level can be adjusted using the onboard level control.
Speaker Level to Line Level Conversion
The CV-600 makes it possible to take an audio signal directly from an amplifier's speaker output and convert it to a lower-level signal suitable for additional audio equipment. It supports applications ranging from conventional 4–8 ohm speaker outputs to 25V, 70V, and 100V commercial speaker systems.
This makes the CV-600 useful when a line-level output is not available from the existing amplifier but an audio signal needs to be sent to another piece of equipment.
Transformer-Isolated Audio Output
The CV-600 uses a center-tapped isolation transformer to separate the input and output circuits. This provides an isolated audio signal while allowing the converter to interface with additional equipment.
The balanced output is rated at 600 ohms, and the output level can be adjusted with the built-in level control. With a 70V input, the CV-600 can produce approximately 1V balanced output into 600 ohms.
Flexible Output Connections
The CV-600 provides several output options for integrating with different audio systems:
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Balanced 600-ohm line-level output
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Unbalanced line-level output
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RCA high-impedance output
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Adjustable output level
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Center-tapped, transformer-isolated output
The input and balanced/unbalanced output connections use screw terminals, while the RCA output provides a convenient connection for compatible equipment.
Designed for Commercial Audio Systems
The CV-600 is particularly useful in commercial paging, distributed audio, background music, public address, and amplifier-to-amplifier applications where an existing speaker line needs to provide an audio feed to another device.
For example, the CV-600 can be used to obtain an audio signal from a 70V speaker line and feed that signal into another amplifier or audio processing device. Grommes also documents applications where the converter is used to obtain a signal from an existing distributed speaker system for additional amplification.
Applications
The Grommes CV-600 can be used for:
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25V, 70V, and 100V distributed audio systems
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4–8 ohm amplifier outputs
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Commercial paging systems
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Public address systems
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Background music systems
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Booster amplifier installations
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Feeding an additional amplifier from an existing speaker line
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Providing a speaker-level signal to a preamplifier or other line-level equipment
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Audio system retrofits where a dedicated line output is unavailable
Features
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Converts speaker-level audio to line-level audio
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Supports 4–8 ohm direct speaker outputs
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Supports 25V, 70V, and 100V speaker lines
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Maximum input level up to 140V
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Transformer-isolated output
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Balanced 600-ohm output
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Unbalanced output capability
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RCA high-impedance output
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Adjustable output level control
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Screw-terminal connections
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Rugged steel enclosure
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Compact design with mounting holes
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Made in the USA by Grommes~Precision
Specifications
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Specification
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Grommes CV-600
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Input
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4–8 ohm speaker level, 25V/70V/100V distributed speaker line
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Maximum Input
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140V
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Output
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600 ohm line level
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Output Type
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Balanced and unbalanced
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RCA Output
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High impedance
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Transformer
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Isolation transformer coupled
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Frequency Response
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50Hz–20kHz, +3dB
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Dimensions
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2.75" W x 2.75" H x 4.88" D
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Weight
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2 lbs
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Enclosure
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Steel
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Manufacturer
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Grommes~Precision
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Specifications are based on Grommes~Precision's current CV-600 documentation.
Why Choose the Grommes CV-600?
The Grommes CV-600 provides a simple solution when an audio system has a speaker-level signal but no convenient line-level output. Its support for conventional speaker impedances as well as 25V, 70V, and 100V distributed audio makes it suitable for a wide range of commercial and professional audio installations.
The transformer-isolated design, adjustable output level, multiple output options, and compact steel enclosure make the CV-600 a practical choice for integrating existing speaker systems with additional amplifiers and line-level audio equipment.
