Leema Acoustics
Essentials
High Resolution
Phono Amplifier
INSTRUCTION MANUAL
ISSUE 1
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Introduction
A
B
C D E
F
Congratulations on your purchase of our Essentials series Phono Amplifier.
Its circuitry has been derived from that of our class leading Agena Phono Amplifier,
from the Reference series of products.
The unit features a switchable moving coil or moving magnet input, together with a
switchable bass cut filter to minimise rumble.
The selections must only be made with the unit powered off.
Changing settings while the unit is on may damage other
components in your system. Turn amplifier off first.
On initial powering, the unit undergoes a soft start routine which means no audio is
produced for approx 30 seconds on power up.
A Turntable ground point. Some of the more esoterically wired turntables may
produce a hum loop when connected here. If hum is generated, do not use.
B Line output. Two RCA Phono output connectors, marked left and right. Connect
these to a suitable line input on your amplifier or pre-amplifier, for example,
auxiliary, using high quality RCA to RCA leads. Do Not connect to a Phono
input. The output of the Essentials Phono Amplifier is at line level and would
severely overload such an input.
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C Bass cut switch. Using a suitable small pointed object such as a small screwdriver,
the bass cut can be switched in or out of circuit as required, by pushing the small
latching switch accessed through a small hole next to the power input connector.
As can be seen above, when the switch is down (pushed in) the bass cut
(rumble filter) is switched in to the circuit.
D Power input. This is where the included power unit is connected. Do Not use any
power supply which is not a Leema Acoustics supplied model. Doing so will
invalidate the manufacturer's warranty.
E Cartridge sensitivity. The input sensitivity is changed using the same method as
selecting the bass cut circuit. Using a suitable small pointed object, such as a
small screwdriver, the selection switch can be accessed through the small hole.
The unit is set for moving coil when the switch is up, and for moving magnet when
the switch is pushed down.
F Turntable input. The output RCA leads from the turntable plug in here. Ensure that
the left and right orientation is correctly observed.
Specifications
Moving magnet gain 36 dB
Moving coil gain 62 dB
Frequency response +/- 0.5 dB ref RIAA curve 20 Hz to 20 kHz
Distortion Less than 0.02 % at 1 kHz
Residual noise Moving magnet better than -86 dBA input short circuit
Residual noise Moving coil, better than -75 dBA input short circuit
Load characteristics Moving magnet 47 k Ohm + 100 pF
Load characteristics Moving coil 90 Ohms + 1 nF
Input sensitivity Moving magnet 4 mV RMS for 250 mV RMS out at 1 kHz
Input sensitivity Moving coil 180 uV RMS for 250 mV RMS out at 1 kHz
Headroom Greater than +26 dB at 1 kHz
High pass filter -3 dB at 20 Hz
Dimensions H: 50 mm inc feet, W: 110 mm
D: 100 mm including earth terminal
Best regards................... The Leema Team
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