e 904
Cardioid Drum Microphone
Instruction manual
Delivery includes
- e 904
- MZH 604 microphone clamp
- pouch
- quick guide
- safety guide
Product Overview
- Sound inlet basket
- XLR-3 connector
- Microphone clamp
Installation
Attaching the microphone
Fasten the holder to the microphone using the screw.
Connecting the microphone Connect the XLR-3 socket of the microphone cable (optional accessories) to the XLR-3 socket of the microphone.
Operation
Positioning the microphone on a drum Use the microphone clamp to attach the e 904 to the rim of the drum. Position the microphone on the drum so that it is 3 to 5 cm above the drumhead.
It is vital to observe the following notes:
| Position | Resulting sound | Commentary |
| A | More fundamental Little overtones | Position on the drum: 3 to 5 cm above the drumskin The fundamental to overtones ratio can be adjusted by changing the angle of the microphone. The most balanced results are obtained at an angle of 30 to 60°. |
| B | Less fundamental Many overtones | |
| C | Use of a second e 904 for picking up the bottom of the drumskin and the snares. NB: The lower microphone must be phase-reversed to avoid phase-cancellation effects due to the second microphone being on the other side of the drumskin. | |
| A | B | C |
 |  |  |
Positioning the monitor loudspeakers To prevent feedback and crosstalk, position your monitor loudspeakers in the angle area of the highest cancellation of the microphone (approx. 180°).
Cleaning and maintaining the e 904
CAUTION
LIQUIDS CAN DAMAGE THE ELECTRONICS OF THE PRODUCT! Liquids entering the housing of the product can cause a short-circuit and damage the electronics. Keep all liquids away from the product. Do not use any solvents or cleansing agents.Disconnect the products from the power supply system and remove rechargeable batteries and batteries before you begin cleaning. Clean all products only with a soft, dry cloth.
Specifications
| Transducer principle | dynamic |
| Frequency response | 40 – 18,000 Hz |
| Pick-up pattern | cardioid |
| Sensitivity (free field, no load) | 2.0 mV/Pa |
| Nominal impedance (at 1 kHz) | 350 Ω |
| Min. terminating impedance | 1 kΩ |
| Connector | XLR-3 |
| Dimensions | Ø 41 mm, length 63 mm |
| Weight | 125 g |
Polar pattern
Frequency response
Connector assignment
Overview of applications
Primary application
Secondary application
e 904
