User manual ROLLS RD320

[. . . ] In the absence of such purchase receipt, the warranty period shall be one (1) year from the date of manufacture. This warranty shall be invalid if the product is damaged as a result of defacement, misuse, abuse, neglect, accident, destruction or alteration of the serial number, improper electrical voltages or currents, repair, alteration or maintenance by any person or party other than our own service facility or an authorized Service Center, or any use violative of instructions furnished by us. This one-year warranty is in lieu of all expressed warranties, obligations or liabilities. [. . . ] The delay is easily set from the front panel by setting the DIP switches, and the input and output levels are adjusted via front panel trim potentiometers. DESCRIPTION FRONT PANEL INPUT LEVEL +16 +10 0 -7 -13 PWR INPUT LEVEL OUTPUT LEVEL 5 10 20 40 80 160 OPERATION Cont. Selecting the Delay range Selecting the delay range is done by moving the shorting jumper on the front panel to the desired position. Either the long position (MS) for room time delay, or the short position (µS) for speaker driver alignment. Figuring the Long Time Delay Time delay in milliseconds (MS) is figured by adding the DIP switch ON (Switch Down) positions then add 5. Example, If the 5 and 80 switches are down, the delay time is 5 + 80 + 5 = 90 milliseconds of delay time. Figuring the Short Delay Time In the short position, figure the long time delay time, then divide by 128. For example, the minimum time delay is 5 milliseconds in the long position. In the short position it would be; 5 / 128 = 39 µS (or . 000039 sec). The speed of sound at sea level is approximately 1100 feet/second. So that would be 1100 x . 000039 = . 043 feet, or multiplied by 12 inches = . 51 inches. D IG IT A L D ELA Y RD320 MS uS INPUT LEVEL LEDs: Indicate the amount of input signal level, in decibels. INPUT LEVEL: Adjusts the amount of input signal. OUTPUT LEVEL: Adjusts the amount of output signal. DIP SWITCHES: Set the delay time MS: If the shorting jumper is in this position, the long delay time has been selected. µS: When the jumper is in this position, the short delay time has been selected. PWR: Indicates that the RD320 has power and the power switch is in the ON position. [. . . ] Set the output level to drive the power amp or signal processing that follows the delay. The input level range is from -infinity to unity gain. Remember to run the input level as high as possible without clipping to achieve the highest signal to noise ratio. [. . . ]