Table of Contents
Advertisement
Advertisement
Table of Contents
Summary of Contents for Q2 Audio Compex F760X-RS
- Page 1 Compex F760X-RS...
- Page 2 220V to 240V. Fuse ratings for specific mains voltages are screened on the back of the Compex. If there are any questions, please contact Q2 Audio directly via the contact info at: www.q2audio.com. There are no user serviceable parts inside the Compex, please contact your dealer or Q2 Audio for servicing.
- Page 3 F760X Series Limiter - Compressor-Expander Operation Procedure: Quick Start Establishing the unit in the channel ***Verify proper mains voltage setting before applying power*** a). Check Expander section switched ‘out’; Compressor Ratio switched to 1:1 (i.e. non-operative); the Peak Limit switched ‘In’;...
- Page 4 OPERATION PROCEDURE Establishing the unit in the channel a). Check Expander section switched ‘out’; Compressor Ratio switched to 1:1 (i.e. non-operative); the Peak Limit switched ‘In’; and the output attenuator turned down (in a stereo unit the individual channel potentiometers would be fully open on each channel with control effected on the ganged device) would be adjusted as required.
- Page 5 The Expander/Gate Section: Expand Mode i). in the ‘Expand’ mode the low level gain reduction slope is of the order of 2:1. The control is ‘feed forward’ so that the expander side-chain is arranged to monitor the input signal prior to the F760 input attenuators. The meter will indicate gain reduction when it operates and at the same time the green indicator will flash to differentiate it from high level gain reduc- tion (limiting/compression).
- Page 6 LIMITING & COMPRESSION – Considerations The usual purpose of Limiting and Compression is to a). Increase loudness and b). to provide overload protection and generally control level. LIMITING implies the use of a level control divide to provide overload protection; its purpose to ‘limit’ the signal level at some specified point.
- Page 7 MODULATION: If more than about 6dB of compression is used it is desirable to treat individual instruments or groups of instruments, separately in order to avoid modulation effects when a dominant instrument or sound modulates the rest of the signal. It is impossible to limit satisfactorily low frequency instruments on a final balance. Try limiting the low frequency section of an organ recording or well modulated tympani in an orchestral recording;...
- Page 8 The ATTACK and RELEASE parameters offer a wide range of possible combinations to handle any situation most ef- fectively. The ATTACK control determines the speed at which the Expander/Gate opens from the attenuated mode; the RELEASE controls the rate at which the device attenuates along its particular slope towards the maximum attenuation pre-set by the RANGE control.
- Page 9 AUDIO & DESIGN (READING) LTD. & Q2 Audio, LLC Check out Procedure - F760X Series 1: Before switching on unit check that the mechanical zero of the meters is correct – adjust as necessary. Allow the unit at least 30 minutes to warm up, an hour is better. The FET’s are affected by heat and they should be allowed to attain the normal operating temperature of the unit before continuing.
- Page 10 8. If output attenuator(s) are fully CW (open), the output should be +12dBu. If it is not, adjust 1K potentiometer (VR6) near the edge of the front PCB to give +12dBu output. If the meter no longer reads 4dB of GR, go back to step 7 and repeat. 9.
Need help?
Do you have a question about the Compex F760X-RS and is the answer not in the manual?
Questions and answers