Thank you very much for purchasing STAX SRM-252S driver unit for ear speaker. Please
read this manual carefully in order to use the unit safely and to bring out its maximum
performance for many years of listening pleasure. Please be sure to keep this manual
along with the warranty card for future.
PRO ONLY
SRM-252S
DRIVER UNIT FOR EARSPEAKER
LEVEL
OFF
Safety information
This product contains high-voltage circuitry. Never attempt to disassemble or
modify it to avoid danger.
The following audio equipments can be
connected to the SRM-252S driver unit.
Please be sure to turn the volume knob fully
counterclockwise before connecting it to other
equipments
●Connectable equipments are pre-/integrated
amplifier (“REC OUT” or “PRE OUT” terminal),
CD player, cassette deck, tuner, video deck,
DAT/MD deck, etc. Also the line output or the
headphone jack of a portable audio player can
directly be connected to the driver unit.
●Connect the above audio equipments to the
input terminal on the SRM-252S rear panel
using the supplied audio cable.
When connecting to the headphone jack, use a
commercially available conversion cable or
conversion connector.
●Insert the supplied AC power adaptor into a
wall (or table) socket, and then its other plug
into the DC inlet on the SRM-252S rear panel.
●Insert the cable plug of your ear speaker with
its convex mark upward into the SRM-252S
front panel socket. Power on the unit and turn
the volume knob slowly clockwise to set optimal
volume level.
“PARALLEL OUT” terminal is a direct output
connected to “INPUT” as shown in the diagram
on page 3. It can be used for connection to
another driver unit or to an amplifier to drive a
loudspeaker.
Note: When the pre-/integrated amplifier
connected to “PARALLEL OUT” is powered
off, sound might be distorted because of the
lowered input impedance. In this case, either
power on the pre-/integrated amplifier or
disconnect the cable.
-2-
Page 3
各部の名称
【フロント側/FRONT PANEL】
2 2
Terminals and functions
パイロットランプ/LED
PRO ONLY
イヤースピーカー用出力端子
Output terminal for ear speaker:
【リア側/REAR PANEL】
INPUT INPUT
R
STAX LTD.
SERIAL No.
PARALLEL
OUT
SRM-252S
DRIVER UNIT FOR EARSPEAKER
PARALLEL
OUT
Driver unit for earspeaker
L
RISK OF ELECTRIC SHOCK
DO NOT OPEN
↓
CAUTION
LEVEL
OFF
パワースイッチ/ボリュームツマミ
Power switch/Volume knob
DC12V/4W
SRM-252S
!
MADE IN JAPAN
入力端子/パラレル出力端子
「IN」と「OUT」は逆でもOKです
“IN” and “OUT” are replaceable.
DC入力端子/DC input terminal
付属ACアダプターのプラグを挿入します
The supplied AC adaptor plug connects to this terminal.
-3-
Page 4
3
接続の例
3
Connection examples
ソース機器と直接接続する場合:When connecting directly to source equipment:
The AC power adaptor must be inserted into a wall
(or table) socket of the same mains voltage stated
on the adapter box.
When adding the SRM-252S to the existing
system:
Connect it to the “REC OUT” terminal of a preamplifier or integrated amplifier.
The volume level can be adjusted using the
volume knob on the SRM-252S front panel.
Also SACD/CD player, cassette deck, tuner,
video deck, DAT/MD deck, PC audio output or
headphone jack of a portable audio player can
directly be connected to the SRM-252S driver
unit.
How to adjust the volume level when
connected to a headphone jack?
If a portable audio player or a TV set has only
headphone output with volume control and has
no line output, first adjust and fix the volume
level using its supplied headphone. Next, adjust
the ear speaker volume to an optimal level using
the volume knob of the driver unit.
transformer or motor, or a microwave
oven located near the driver unit? In this
case, keep them away from the unit.
●Isn’t the ground side of connected cable
floated or in poor contact? Check for
the ground contact or replace the plug.
④Channel level is unbalanced.
●When raising volume slowly from zero, it
sometimes happens that sound does not
simultaneously start to come out from
left and right channels.
This is the so-called “gang-error” of a
double-axis volume controller, and not a
failure.