DIVALDI Clear Series User manual

AMP-02
HEADPHONE AMPLIFIER
CLEAR SERIES
USER MANUAL

Thank you for purchasing our audio equipment.
We have made every eort to ensure highest quality of our
products to meet your highest expectaons.
We will be grateful for any comments and suggesons that will
help us improve our equipment.
Włodzimierz Duval

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TABLE OF CONTENTS
1. General descripon
2. Funconal descripon
3. Connecon scheme
4. Basic safety condions
5. Maintenance and repairs
6. Packaging contents
7. Technical parameters
8. Contact

HEADPHONE AMPLIFIER AMP-02
1. GENERAL DESCRIPTION
Headphone amplier is a device made for listening to audio signals
using Hi-Fi headphones with 6,3 mm Jack plug.
Amplier’s and power supply’s casings were designed and made
of solid, high quality aluminum blocks.
AMP-02 is equipped with delayed headphone start system,
which was opmized and improved for this model (compared to
AMP-01). The device is ready to operate aer few seconds aer
switching on.
The device is powered by PS-AMP01 power supply of safe
16 V AC voltage, which guarantees opmal parameters.
Construcon of our amplier is an unique version of class A
amplier with reproducon of arcial mass and work mode
typical for valve ampliers. AMP-02 was designed to play music
of following genres: Opera, Classical music, Jazz, Rock, POP. It can
cooperate with line signal devices such as CD, Tuner, DAT, tape
recorder or work directly with analog Hi-Fi turntables (MM and
MC cartridges). In Phono mode for MC cartridges an addional
separate amplier stage is used in which Global Negave
Feedback Loop (Non Global NFB) is not used. The device is
equipped with impedance match selector for MC cartridges from
various manufacturers. The amplier was made with two single,
separated mono channels with separate power supplies for le
and right channel. Assembly of all electronic components is hand-
made with through-hole technology, one excepon is MC stage.
All electronic components were selected and paired by hand.
Process of selecng and seng up the components was based
on compability with most popular headphones by brands such as
Sennheiser (HD-600, HD-800), AKG (Q701,812), Audeze (LCD3,
LCD4), Final Audio Design (Pandora Hope IV, VI).
ADDITIONAL FUNCTION!
AMP-02 may also work as a Phono MM/MC preamplier. This
variant allows connecon of a turntable with a transistor power
amplier, tube amplier, AV amplier, and a reel-to-reel tape
recorder. Signal output can be derived from headphone output
jack via Jack Stereo/RCA Stereo connector (not included) –
connecon scheme Fig.2.
In preamplier mode output level of AMP-02 signal can be
adjusted with volume knob, it’s directly connected to signal’s
harmonic saturaon. This seng allows user to slightly aect
the sharpness or soness of the sound. Adjustment range is
between „hour” 9 and 14 of the volume knob.
Bare in mind that selecon of wiring can signicantly improve
quality of the sound.

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HEADPHONE AMPLIFIER AMP-02
2. FUNCTIONAL DESCRIPTION
AMP-02 has two RCA signal inputs on the rear panel.
First input is a line input (3) for connecng analog signals from
devices such as CD, DVD, B-Ray, Tuner, tape recorder, Mixer,
DAC, PC.
Second input (4) is for analog turntables (Phono) with RIAA
correcon for MM and MC phono cartridges only.
Grounding screw (6) for turntable is placed next to the input
sockets. Skipping connecng this element may result with
interferences and hums, in extreme cases also damage the
amplier or headphones.
To choose signal source change the posion of Line/Phono switch
(5).
To choose MM or MC cartridge change the posion of MM/MC
switch (2).
Both switches are located on the rear panel of the device.
Load adjustment selector for MC cartridges (11) is hidden at
the boom cover. It has a ten-step regulaon for each channel
separately (L / R).
Headphone input socket (7) is located on the front of the device.
- connecon scheme Fig.1.
Volume adjustment knob (8) is located on top part of the device.
The amplier should be connected with the power supply (sockets
1 and 12) with a cable provided in the set - connecon scheme
Fig.3.
Power supply’s ON/OFF switch (13) is located on its rear panel.
230/110 V main power socket is located next to the power switch
on the rear panel. Main power cable is included in the set.
Turning the power on is indicated by control light (14) placed on
the front of PS-AMP01 and under AMP-02 volume knob (8).

1. Power socket (16V AC)
2. MM / MC switch
3. Line input sockets
4. Turntable input sockets
5. Line / Phono input switch
6. Turntable grounding screw
7. Headphone output jack
8. Volume knob
9. Power control light under volume knob
10. Feet of the device
11. Adjustment selector for MC cartridges
12. 16V AC power supply socket
13. 230V AC (100V) power switch
14. Power control light
15. 230V AC (100V) power supply
The impedance adjustment selector for the MC insert:
0 - 2400 Ohm
1 - 100 Ohm
2 - 50 Ohm
3 - 33 Ohm
4 - 22 Ohm
5 - 18 Ohm
6 - 15 Ohm
7 - 13 Ohm
8 - 12 Ohm
9 - 10 Ohm
Impedance adjustment is independent for right channel (upper)
and le channel (lower) and allows to adjust impedance accordingly
to the MC cartridge manufacturer’s recommendaons.
For MM cartridge 0 is 100pF, posions 1.2.3.4.5.6.7.8.9 match
200pF.

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Fig. 1.
Connecon of RCA inputs to signal sources - turntable/CD/tuner
HEADPHONE AMPLIFIER AMP-02
3. CONNECTION SCHEME

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Fig. 2.
Phono preamplier mode connecon scheme for external power
amplier
WARNING!
Connecng a line signal to Phono input may cause signal’s
overload and side eects including risk of damaging connected
headphones.

• Device can be powered only by a dedicated 16V AC power
supply supplied by the manufacturer.
• The device is intended to be used indoors only.
• Protect the device from mechanical damage (in parcular
dropping) and contact with liquids (rain, drinks).
• All repairs may be performed by authorized service providers
only.
• Do not connect power to damaged device.
• Do not disassemble the device. There are no adjustable
elements inside.
• Do not switch the device on in rooms with a humidity of
90% and more.
• The device should not be used in temperatures lower than
10°C or above 45°C.
• 16V AC power cable ended with plugs should be plugged
into the rear panel of the power supply and rear panel of
the amplier. The plug of the power supply is secured with a
latch. 230V AC power cable should be plugged into the rear
panel of the power supply. Main power switch is located on
the rear panel of the power supply.
The device can be wiped with a damp cloth. Do not use alcohol
or water in direct contact with the device. Do not use other
cleaning substances available in the household. The device does
not contain any elements that can be repaired by an unqualied
person. In case of a malfuncon, please contact the seller or
manufacturer.
HEADPHONE AMPLIFIER AMP-02
4. BASIC SAFETY CONDITIONS
HEADPHONE AMPLIFIER AMP-02
5. MAINTENANCE AND REPAIR
Fig. 3.
Connecon scheme of the amplier and power supply

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• Amplier
• Power Supply
• AC power cord
• 16V AC connecon cable
Headphone Amplier AMP-02
Output power: 800 mW (Class A), 3.5W max. (impulse)
Output load: min 30 Ohm - 600 Ohm
Frequency response: 20Hz-20kHz / -0.5dB
Voltage amplicaon of the power stage: 20 dB
Phono MM step gain: 40 dB
Voltage amplicaon of the MC stage: 20 dB
Fit to the MM insert: 47 kOhm (100pF)
Adaptaon to the MC cartridge: 10/22/33/50/100 Ohm (and more)
Input: RCA stereo socket 1x Linear, RCA stereo 1x Phono MM / MC
Output: 6.3mm stereo jack
Power supply: 16 V AC
Power consumpon: 1A max.
Power consumpon: 15 W max.
Load capacity of outputs: Max. 0.5A / channel (impulse)
Dimensions:
Width: 115mm
Height: 55 mm
Depth: 102mm
Weight: 0.7 kg
Power Supply PS-AMP01
230V AC input power supply (100V)
16V AC output power
Current load max 1A
Max power 20W
Toroidal transformer
230V AC power switch (100V)
Dimensions:
Width: 115mm
Height: 37mm
Depth: 102mm
Weight: 0.7kg
Total weight AMP-02 + PS-AMP01 + packaging: 2.1kg
HEADPHONE AMPLIFIER AMP-02
6. PACKAGING CONTENTS
HEADPHONE AMPLIFIER AMP-02
POWER SUPPLY PS-AMP01
7. TECHNICAL PARAMETERS
WARNING!
Any unauthorized repairs may cause irreparable damage of the
device or create other hazards and cancel the warranty.

HEADPHONE AMPLIFIER AMP-02
USER MANUAL
VERSION 1.1
Mediam Sp. z o.o.
Wadowicka 12
30-415 Kraków, Polska
www.divaldi.pl
8. CONTACT