The APEQ range of hardware equalizers are stand-alone hardware solutions, delivered in professional-grade 1U rack-mount housing. A PC is only required to run the CONEQ measurement software and upload the correction filter by a USB connection to the non volatile memory of any APEQ device. APEQ 2pro DIO and APEQ 8pro DIO are delivered with balanced analogue and digital I/O, the APEQ 2pro with balanced analogue I/O as standard. All units are equipped with a safety relays and will pass through the unaltered analogue input signal to the output in case of a power failure. APEQ products include a time limited license for CONEQ Workshop measurement software (limited to one month starting from the day of first activation).