MV411 1/4-inch Preamplifier
MV411 is
1/4-inch preamplifier developed by BSWA, which is suitable for MK series
1/4-inch 200V polarized microphones. It is a low-noise and high-quality
preamplifier that can be used in a variety of acoustic applications.
The main function of the preamplifier is
impedance change, since the output impedance of the microphone is above GΩ, it
cannot be directly connected to the common data acquisition equipment. The high
input impedance and low output impedance of the preamplifier can reduce the
output impedance of the microphone to less than 100 Ω.
MV411 can
provide polarization voltage to the microphone, so it is suitable for 200V
polarized microphones (it can also be used for pre-polarized microphones when
the polarization voltage of the power supply is turned off). This kind of
preamplifier can be powered by single power supply (28 V ~ 120 V) or dual power
supply (±14 V ~ ±60 V) and the MC7xx series power supply conditioner is
required. When using a single power supply, the output signal of the
preamplifier has a DC bias voltage, which is approx. 1/2 of the supply voltage.
However, when using dual power supply, the output bias voltage is approx. 0 V
(with an error of ± 1 V).
MV411 is
supplied with a 2-metre fixed cable (customizable length) and a LEMO connector
as the output. It should be noted that different microphone capacitance can
affect the low-frequency response of the preamplifier, while different
capacitive output loads can affect the high-frequency response of the
preamplifier.
MV411 can
choose to supply with TEDS to support read microphone information directly by
data acquisition equipment, including microphone model, serial number,
sensitivity, etc. BSWA TEDS microphone supports the IEEE 1451.4 standard. The
version of 0.9 is used by default to be compatible with more data acquisition
equipment. The version of 1.0 can also be selected according to user’s
requirements.
Features:
● Suitable
for 1/4-inch 200V polarized microphone
● Single or
dual power supply preamplifier
● Frequency
response: 10 Hz ~ 200 kHz (±0.5 dB)
● Attenuation:
0.3 dB (typ.)
● Connector:
7-pin LEMO
● Optional
TEDS (IEEE.1451.4)
Applications:
● Common
acoustic measurement
● Environmental,
industrial, traffic and other acoustic measurement
● Sound
intensity probes
Specifications：
| Diameter | 1/4" | |
|---|---|---|
| Polarization Voltage Support | Yes | |
| Frequency Response (Hz) (±0.5 dB) 1 | 10 ~ 200 k | |
| Attenuation (dB) | 0.3 (typ.) | |
| Maximum Output Voltage (Vp) 2 | ±9 ~ ±55 | |
| Self-generated Noise | A-weighted | <3.5 μV (3 μV typ.) |
| 20 Hz ~ 20 kHz | <14 μV (8 μV typ.) | |
| Input Impedance (G ǁ pF) | 15 ǁ 0.4 | |
| Output Impedance (Ω) | <30 | |
| Power Supply | Single: 28 V ~ 120 V, Dual: ±14 V ~ ±60 V | |
| DC Bias Voltage (V) | Approx. the midpoint voltage of PWR+ plus PWR- | |
| Operating Temperature Range (°C) | -30 ~ 80 | |
| Operating Humidity Range (%RH) | 0 ~ 95 | |
| Dimensions (mm) | Ø6.35 × 85 | |
| Mounting Thread for Microphone | 5.7 mm-60 UNS | |
| Output Connector | LEMO FGG.1B.307 | |
| Weight (g) | 74 (with 2-metre fixed cable and LEMO connector) | |
| TEDS | Optional, IEEE 1451.4 compliant (default v0.9, optional v1.0) | |
|
Note 1: Measured using a 15 pF microphone capacitance under small signal conditions (1 Vrms). |
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Download information:
MV411 1/4-inch Preamplifier Brife
