Operation Manual MA 25/MA 25e
MA 27/MA 27e
8104818 Rev. 5
30
29/06/2021
Intensity
AC: -10 dB HL
to 100 dB
HL
Frequency
range
125 Hz to 8000 Hz. Frequencies can be freely deselected
(except 1000 Hz)
Weight
MA 25/MA 25e: 1.0 kg/2.2 lbs
– including batteries and
headset. (1.6 kg/3.5 lbs
– including carrying bag headset,
audiogram charts etc.)
MA 27/MA 27e:2.4 kg/5.28 lbs
– including power supply,
headset and audiogram pad.
Dimensions
MA 25/MA 25e:
225 mm x 180 mm x 55 mm / 8.9 in x 7.1 in x 2.2 in
MA 27/MA 27e:
255 mm x 370 mm x 150 mm / 10 in x 14.5 in x 6 in
Display
MA 25/MA 25e:
38.1 mm x 50.8 mm / 1.5 in x 2 in, Monochrome
MA 27/MA 27e:
38.1 mm x 76.2 mm / 1.5 in x 3 in, Monochrome
Language
Settings
English, Deutsch, Español, Fran
ҫais, Dutch
PC Connection
1 x USB B for PC Connection (comparable with USB 1.1 and later)
Warm up-time
1 minute incl. boot-up time
Store Function
MA 25e/MA 27e only: Soft key (function key) store button and
internal memory for AC L/R. Stored measurements can be
viewed on built-in display.
Distortion
0.3% typical at full intensity
Rise/fall Times
~35 ms
6.2 Connections
Figure 18
Figure 19
Table 12 Connections on Backside
CONNECTIONS
No Connection-
socket
Specification
1
Phone L
ZA =10 Ω, UA = 7 Veff
2
Phone R
ZA =10 Ω, UA = 7 Veff
3
Patient Resp.
RI = 330R
4
USB/DC-in
USB 2.0
1 2 3 4
1 2 3 4
MA 25/MA25e
MA 27/MA27e
