New technology old reliability j.W. Davis & company • 3030 canton street • p.O. Box 710219 • dallas, texas 75371-0219 sales 800-527-5705 • fax 800-388-9106 • corp 214-651-7341 • fax 214-939-0328 • sales@jwd.Com • www.Jwd.Com da-120m master series amplifier user’s manual the mark of the professional....
The mark of the professional... New technology old reliability j.W. Davis & company 3030 canton street • p.O. Box 710219 • dallas, texas 75371-0219 sales 800-527-5705 • fax 800-388-9106 • corp 214-651-7341 • fax 214-939-0328 • sales@jwd.Com • www.Jwd.Com • this unit was carefully checked and packed ...
The third dip switch (designated “j”) activates the microphone xlr input. Do not use the phoenix-type microphone input at the same time as this will degrade the signal. The front panel has nine controls: six front panel volume controls (to individually control dip switchable microphone or auxiliary ...
The mark of the professional... New technology old reliability j.W. Davis & company 3030 canton street • p.O. Box 710219 • dallas, texas 75371-0219 sales 800-527-5705 • fax 800-388-9106 • corp 214-651-7341 • fax 214-939-0328 • sales@jwd.Com • www.Jwd.Com • 4 note: if the amplifier is frequently move...
The mark of the professional... New technology old reliability j.W. Davis & company 3030 canton street • p.O. Box 710219 • dallas, texas 75371-0219 sales 800-527-5705 • fax 800-388-9106 • corp 214-651-7341 • fax 214-939-0328 • sales@jwd.Com • www.Jwd.Com • iv - back panel detail 5 (9) input 2 xlr in...
The mark of the professional... New technology old reliability j.W. Davis & company 3030 canton street • p.O. Box 710219 • dallas, texas 75371-0219 sales 800-527-5705 • fax 800-388-9106 • corp 214-651-7341 • fax 214-939-0328 • sales@jwd.Com • www.Jwd.Com • 6 input 1 (17) (18) (19) (20) (21) input 5 ...
New technology old reliability j.W. Davis & company 3030 canton street • p.O. Box 710219 • dallas, texas 75371-0219 sales 800-527-5705 • fax 800-388-9106 • corp 214-651-7341 • fax 214-939-0328 • sales@jwd.Com • www.Jwd.Com • 7 the mark of the professional... (39) (40) (41) chassis ground terminal. 2...
The mark of the professional... New technology old reliability j.W. Davis & company 3030 canton street • p.O. Box 710219 • dallas, texas 75371-0219 sales 800-527-5705 • fax 800-388-9106 • corp 214-651-7341 • fax 214-939-0328 • sales@jwd.Com • www.Jwd.Com • 8 vi - circuit board level settings for add...
Accessories wm-120m wall mount kit accessories power consumption indicator’s power on, multi-colored led output meter bass: 100hz >=± 10db sor vox: -37db (via jumper #301) mic 1 vox: -37db (via jumper #205/203) telephone vox: -37db booster out: 600 ohm, 1 volt unbalanced unbalanced mic: >60db teleph...
New technology old reliability j.W. Davis & company 3030 canton street • p.O. Box 710219 • dallas, texas 75371-0219 sales 800-527-5705 • fax 800-388-9106 • corp 214-651-7341 • fax 214-939-0328 • sales@jwd.Com • www.Jwd.Com • the mark of the professional... Xii - considerations for pa speaker layout ...
The transformer taps are marked in w=watts instead of ohms (usually 4, 2, 1, ¹⁄₂). Again, it should be born in mind that these levels of power output are only achieved when the transformer is working at 70.7 volts. The transformers are connected in parallel. A good match is obtained by ensuring that...
New technology old reliability j.W. Davis & company 3030 canton street • p.O. Box 710219 • dallas, texas 75371-0219 sales 800-527-5705 • fax 800-388-9106 • corp 214-651-7341 • fax 214-939-0328 • sales@jwd.Com • www.Jwd.Com • the mark of the professional... Viii - polarity all jwd speakers have the “...
The mark of the professional... New technology old reliability j.W. Davis & company 3030 canton street • p.O. Box 710219 • dallas, texas 75371-0219 sales 800-527-5705 • fax 800-388-9106 • corp 214-651-7341 • fax 214-939-0328 • sales@jwd.Com • www.Jwd.Com • 13 x - schema tic for input modules 1-4.
New technology old reliability j.W. Davis & company 3030 canton street • p.O. Box 710219 • dallas, texas 75371-0219 sales 800-527-5705 • fax 800-388-9106 • corp 214-651-7341 • fax 214-939-0328 • sales@jwd.Com • www.Jwd.Com • the mark of the professional... 14 xi - schema tic for input modules 5-6.
New technology old reliability j.W. Davis & company 3030 canton street • p.O. Box 710219 • dallas, texas 75371-0219 sales 800-527-5705 • fax 800-388-9106 • corp 214-651-7341 • fax 214-939-0328 • sales@jwd.Com • www.Jwd.Com • the mark of the professional... 15 xii - schema tic for chassis board.
Da-120m master series amplifier please note: thank you for selecting a j. W. Davis da-120m amplifier. Since 1933 it has been our goal to produce a complete line of quality products and to offer a five year warranty on most j. W. Davis items. We also promise that you or your customer will not see our...
