Calibrating Otari MX 55

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Lovely Bathroom Makeovers
These steps are for 71/2 ips only, which is the Low setting in this machine. Start Recording , Switch to Input and select 10Khz test tone for overbias, Input levels @ -6 so you can have space and can see Maximum point when turning to right. Switch to Repro, turn the knob or screw to the left FIRST, so you can start from -20 , now to the right until the maximum point is achieved and continue to the right and reduce in this case by 4db for both chanels. ......... Switch to Input and select 1Khz test tone for Rec Levels @ (0db) switch to repro and adjust VR14 and VR24 to match 0db for both chanels. ..........Switch to input and select 10Khz test tone for EQ @0db, ...Switch to Repro and adjust VR13 and VR23 to match 0db for both chanels. .........Switch to Input and select 100Hz test tone for low freq adjustment @ 0db....Switch to Repro and adjust VR31 and VR41 to match 0db for both chanels . You are done!!! Do the same every time you switch tape formulations, follow the tape manufacturer specifications for bias setting or overbias. Now go and play with your Toy and make it sound the way it should be. Enjoy!!!! .

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