ENLEUM AMP-23R Headphone or Speaker Amplifier Owner’s Manual
- June 9, 2024
- ENLEUM
Table of Contents
ENLEUM AMP-23R Headphone or Speaker Amplifier Owner’s Manual
INTRODUCTION
Congratulations on becoming a happy owner of the Enleum AMP-23R.
The AMP-23R represents our best efforts to deliver our years of experience and
expertise for audiophiles and music lovers. With such advanced technology and
design behind the product, the AMP-23R ensures the best possible quality of
music reproduction.
PACKAGING
Inside the packaging box, you will find the below contents;
- AMP-23R
- Remote Controller
- Isolation Feet (Set of 3)
- Owner’s Manual The original packaging box has been created to carefully protect its contents. Please do not discard the box in case of possible shipments in the future.
FRONT OVERVIEW
POWER & SELECT
The power and select control are combined as a single button. With the AC
power cable plugged in, the AMP-23R goes into standby mode. In standby mode,
pushing the button for 2 seconds will turn on the amplifier and the input LED
will light up. While the amplifier is on, push the button to select the input
source. During the input change, the gain level is automatically changed to
zero (mute), after which it is then returned to its last position step.
Pushing the button for 2 seconds will put the amplifier back into standby
mode.
Remarks: The latest generation JET2 Bias circuit inside the AMP-23R
stabilizes its bias level during the initial turn-on period for about 3
seconds. During this startup period, the LEDs will blink periodically and the
AMP-23R will be in mute mode with no signal output in order to check the AC
voltage, DC voltage and temperature. The LEDs would also blink when the AMP-
23R enters into protection mode from either DC voltage, AC input voltage or
high temperature problems. The protection mode will mute the output and the
LED will continue to blink until the user disconnects the power cord for
further service.
“GAIN PHASE” KNOB & DISPLAY
The “Gain Phase” knob sets the current gain level of the AMP-23R. It employs a
motorized volume pot, so that the software can read the position of the volume
pot and send it to the attenuator circuit. The attenuator circuit contains
various sets of resistors and relays for the precise gain level according to
the position of the knob — as indicated on its surrounding “dot”. The first
dot at 7 o’clock position represets the minimum gain level and the last dot at
5 o’clock position is the maximum gain level.
Remarks: As with conventional mechanical attenuators, it is possible to hear a small amount of noise while changing the gain level.
REAR OVERVIEW
AC POWER INLET
The AC POWER INLET contains an AC power receptacle (IEC standard) and a fuse
holder. Securely connect the AC power cable here. When replacing the fuse, be
sure to use the same type and value fuse as specified on the marking label.
MARKING LABEL
The MARKING LABEL is located under the power inlet. It describes the AC main
voltage, power consumption, fuse type and value. Make sure you check this
label carefully before the installation.
Remarks: The AMP-23R incorporates an AC voltage sensing circuit that detects
incoming AC voltage to automatically select the AC transformer primary inputs
during the initial start-up process. This ensures the optimum performance at
any given AC condition. But if the AC voltage is either too low (less than 5%)
or too high (more than 5%), the AMP-23R’s protection circuit will
automatically turn off the amplifier. Please make sure to use the correct fuse
value and type according to the AC voltage.
LOUDSPEAKER OUTPUT
You can connect a pair of loudspeaker cables to the connectors according to +
and — markings. Be careful not to touch and make contacts between any of these
connectors during the installation, as this would pose a risk of damaging the
amplifier and the loudspeakers.
INPUT
There are two sets of conventional voltage inputs (RCA) and one set of ENLINK
current input (BNC). Conventional voltage source components are compatible
with the RCA voltage inputs. The ENLINK is used exclusively for source
components by Enleum.
REMOTE CONTROLLER
POWER & MUTE
Press this button for 2 seconds to turn the AMP-23R on or off from the standby
status. A short press of the button mutes the output and the input LED blinks
during this period. Another short press turns it back on.
GAIN (UP & DOWN)
A short press changes the AMP-23R’s gain Level by a small step and holding
down the button changes the gain level continuously.
SELECT & OPTION
During the AMP-23R’s operation, a short press of this button selects the input
source. Press the button for 2 seconds to enter into the “OPTION” mode, and
the LED will start to blink for the headphone gain and “RETURN TO ZERO”
feature settings as described below.
HEADPHONE GAIN
In the “OPTION” mode, press “UP” or “DOWN” button to move the blinking LED.
The blinking “V1” is in the low gain mode and the blinking “V2” represents the
high gain mode. On the desired mode, press the “OPTION” button for 2 seconds
to set and return to the normal operation.
RETURN TO ZERO
The AMP-23R automatically turns down the knob to minimum during power off. You
can disable this feature to leave the gain knob in a certain position and use
a preamp to control volume. During the “OPTION” mode, press the “POWER”
button, and the other LED (not the blinking gain mode LED) will blink twice to
show that the feature is disabled, or press again and the LED will blink once
and it is enabled. Press the “OPTION” button for 2 seconds to set and return
to the normal operation.
OPERATION
AC POWER
Securely connect the AC power cable to the IEC socket in the rear panel and to
the wall outlet or receptacle.
INPUT SOURCES
Securely connect a pair of conventional RCA interconnect cables from any
voltage source equipment to the RCA connectors Located at the back panel. It
is strongly recommended that any source of equipment from Enleum should be
used with ENLINK. Do not connect any voltage source to the BNC input
connectors.
LOUDSPEAKER OR HEADPHONE OUTPUTS
Securely connect a pair of loudspeaker cables from the output connectors
located at the back panel of the AMP-23R to the Loudspeakers. Connect the
headphones to the front panel’s socket for headphone listening.
After you have installed all the connections, you are now ready to turn on the
AMP-23R to start listening. Please follow the steps below to protect the AMP-
23R against any possible accident or damage.
- Please ensure every connection — AC power, signal input and output is properly connected.
- Turn on the source equipment first, then turn on the AMP-23R.
- Select the desired input and play the source equipment.
- Slowly rotate the knob clockwise or use the remote controller to increase and set your desired gain level.
- To turn off, you may follow the steps above in the reverse order.
SAFETY
All products from Enleum are strictly designed and manufactured to meet safety standards. However, it is important that owners should read and follow below instructions very carefully to avoid any possible damages.
INSTRUCTIONS
Before anything else, you should carefully read and follow all the safety
instructions. It is also important for you to retain the instructions for
future references.
PLACEMENT
Place the product on a rigid rack or shelf to support the weight of the
product. Failure to do so would result in the product to fall, and cause
serious damage to the product.
VENTILATION
The product needs proper ventilation to ensure reliable operation. Do not
place the product in an enclosed area such as a bookcase or rack, or on a soft
surface such as a sofa or a bed.
HEAT
Do not use the product near flames or heat producing appliances such as
radiators, stoves or other amplifiers. Do not stack with other products.
WATER AND MOISTURE
Do not use the product near water. For example, near a bathtub, kitchen sink,
laundry tub or flower vase. Do not put any kind of liquid into the product.
CLEANING
Disconnect the main plug before cleaning. Clean the product only with a dry,
soft, lint-free cloth or a vacuum cleaner. Do not use any liquid or chemical
cleaners.
POWER SOURCES
The product must be connected to the type of power source specified in the
marking labels found on the packaging box or on the product. The primary
method of isolating the product from the main supply is to disconnect the main
plug. Make sure that the main plug remains accessible to make disconnection
possible at any time. Disconnect the main plug if the product will not be used
for an extended period of time or in the event of lightning storms.
POWER CABLE
The product must be connected to the power outlet with an AC power cable that
meets safety standards. Do not overload wall outlets, receptacles, or
extension cords. Do not route the power cable where it will be walked on,
pinched, bent, exposed to heat or damaged. Pay particular attention to the
power cable at the plug, receptacles and where it exits from the product. Do
not defeat grounding and polarization provisions.
BATTERIES
Batteries should not be exposed to excessive heat or incinerated.
SPECIFICATION
MAXIMUM POWER 25 watts (8 0, 1 kHz) I 45 watts (4 0, 1 kHz) I 4 watts (60
0, 1 kHz)
GAIN 22.5 dB max (Speaker, Headphone High) I 7 dB max (Headphone Low)
GAIN CONTROL MPU Controlled Stepped Attenuator
FREQUENCY RESPONSE 10 Hz – 100 kHz
INPUT IMPEDANCE 10 k() (Voltage) I 10 0 (ENLINK)
INPUT 2 Voltage (RCA) I 1 ENLINK (BNC)
OUTPUT 5 Way Speaker Binding Post I 1/4″ Headphone Out
USER INTERFACE One Button & Gain Phase Control I Remote Controller
POWER CONSUMPTION 30 watts (Idle) I 100 watts (Max)
DIMENSIONS 230 mm (W) 230 mm (D) 55 mm or 82.5 mm with isolation option
(H)
WEIGHT 4.0 kg (net) I 4.5 kg (shipping)
WARRANTY
Enleum provides parts and labor free of charge for any manufacturing defects
during the first two years after purchase. After this period, the user is
responsible for both parts and labor costs. It does not cover the
transportation and insurance costs at any period. The warranty is not
transferable and it is limited to the original purchaser in the country of
purchase, provided that the product was purchased from an authorized dealer.
Please keep a copy of the sales receipt to verify such conditions.
Enleum takes no responsibility for any defect from accident, modification,
misuse, abuse, wear and tear or neglect by the user, or any damage or loss
resulted during any transit or shipment for repair. Servicing from an
unauthorized servicing personnel or from the user would also void the
warranty. There are no user-serviceable parts inside and all servicing
inquiries should be submitted to authorized dealers only.
The product should be packed and returned in the original packing box to the
original dealer of purchase. All the transportation and insurance costs are
responsible by the user, and it is important to fully insure the package
against any possible damage or loss during the shipment.
For any technical support inquiries, please contact your dealer first. If the
dealer is unable to answer your inquiries, please contact Enleum directly. The
contact listings of your dealer and us can be also found on our official
website at enleum.com.
WARNING
To reduce the risk of electric shock, do not remove the cover. No user
serviceable parts inside. Refer servicing to qualified service personnel. Do
not expose this product to rain or moisture. The lightning flash with an
arrowhead symbol within an equilateral triangle, is intended to alert the user
to the presence of uninsulated ‘dangerous voltage’ within the product’s
enclosure that may be of sufficient magnitude to constitute a risk of electric
shock to persons. The exclamation point within an equilateral triangle is
intended to alert the user to the presence of important operating and safety
instructions in the literature accompanying the product.
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