User manual DYNAUDIO BM 6A

[. . . ] They contain essential information to enable you to get the best from your monitors. Electrical Safety Warning This unit is supplied with a 3 wire power cord. To prevent possibility of shock hazard do not expose the unit to moisture There are no user serviceable parts inside. Refer servicing to qualified personnel only Ensure correct mains voltage and fuse are selected before connection to mains Setting Up Mains Power Connections Mains power is applied via a fused IEC inlet. [. . . ] The -10 position is intended for semi-professional or domestic use and means that full power is reached with an input level of -10dBm (unbalanced). The control works from 3kHz upwards and has a range of 5dB (see figure 1). The control works from 100Hz downwards and has a range of 5dB (see figure 1). This section uses a special equaliser design which effectively swaps bandwidth for power. As you turn the LF trim level down the low frequency extension is improved. HF Trim. LF Trim. The trim controls are intended to allow the user to make some adjustment of the speaker response to accommodate personal tastes and variations in acoustic environment. Figure 1 - Trim Control Response Indicators There are two LED indicators on the front baffle of the BM6A. On switching the unit on this will shine red for about ten seconds and then turn green to indicate normal operation. If for any reason the amplifier protection circuitry is engaged the LED will turn back to red. The left indicator is a true clip indicator and lights when the low frequency amplifier clips. It is acceptable to run the system with this lighting occasionally but avoid running the system with this lighting most of the time Running In BM6A Owner's Manual - Issue 2 November 1997 Page 3 The drivers in your BM6A must be run in before optimum performance is achieved. Avoid using the system at high levels for the first 24 hours of operation. Full run in is usually achieved after about one week of normal operation. Thermal overload and dc voltage on the outputs will cause the system to engage. This will disconnect the drive units from the amplifier and change the power LED to it's red/fault condition. In addition the HF amplifier has an optical limiter in circuit which prevents excessive long term power reaching the tweeter whilst allowing transients to pass uncompressed. Troubleshooting If the speaker stops working and the power LED turns red (fault condition) switch the unit off and leave it for a while. If the unit works again when you switch back on the fault was probably due to thermal overload, ensure the heatsink is clear of obstruction and has free air circulation around it. If however the fault condition persists the unit should be inspected by qualified personnel (your DA dealer). If the speaker stops working and no LED's are alight then the mains fuse on the back panel should be checked and replaced if necessary. If this does not rectify the problem the unit should be inspected by qualified personnel (your DA dealer). Care Components of the highest quality are used in the BM6 A. [. . . ] This warranty is void if the unit has been tampered with or modified in any way, or in our opinion has not been used in accordance with the instructions above. BM6A Owner's Manual - Issue 2 November 1997 Page 5 Technical Specifications Type: SPL (Peak/Cont. ): Drive units: Internal amplifiers: 2 way active nearfield monitor 116dB / 101dB one cabinet @ 1m. 170 mm bass driver, 26 mm high frequency driver Dual 100W discrete MOSFET power amps. Instrumentation type balanced input section, with input overload protection. [. . . ]