velleman 8021 High-End Control Amplifier Instruction Manual

: June 9, 2024
: Velleman

Table of Contents

velleman 8021 High-End Control Amplifier
Guarantee
FEATURES
PHONO / LINE INPUT SELECTION
CONNECTION
OPERATION
TROUBLESHOOTING
- Symptom/ Possible cause
SPECIFICATIONS
Diagram
VELLEMAN COMPONENTS NV
References
Read User Manual Online (PDF format)
Download This Manual (PDF format)

velleman 8021 High-End Control Amplifier

Thank you for purchasing this Velleman High-end control amplifier. Please read the instructions carefully so that you can use the unit correctly.

WARNING NOTICES

CHECK WHETHER THE MAINS VOLTAGE IS CORRECT FOR THE UNIT.
IN ORDER TO AVOID ELECTRIC SHOCKS, THE POWER-CORD MUST BE REMOVED BEFORE OPENING THE UNIT.
THE MAINS SWITCH IS IN THE SECONDARY POWER SUPPLY CIRCUIT.
THIS MEANS THAT THE UNIT IS NOT COMPLETELY ISOLATED FROM THE MAINS WHEN THE UNIT IS IN STANDBY.

About the power cord

It is possible that in certain countries or regions, the mains plug is different to the one supplied. In such a case a different plug can be fitted, but be careful to ensure that the blue wire is connected to neutral, the brown to live, and the yellow/green to earth. Or ask your dealer for a suitable power cord

Mains voltage

Please check the mains voltage indication at the back of the unit.

For 100Vac to 120Vac, use the 115Vac setting
For 220Vac to 240Vac, use the 230Vac setting

Guarantee

This product is guaranteed against defects in components and construction from the moment it is purchased and for a period of ONE YEAR starting from the date of sale. This guarantee is only valid if the unit is submitted together with the original purchase invoice. VELLEMAN Ltd limits its responsibility to the reparation of defects or, as VELLEMAN Ltd deems necessary, to the replacement or reparation of defective components. Costs and risks connected to the transport, removal or placement of the product, or any other costs directly or indirectly connected to the repair, will not be reimbursed by VELLEMAN Ltd. VELLEMAN Ltd will not be held responsible for any damages caused by the malfunctioning of a unit.

IMPORTANT: Do not throw away the original packaging. Warranty will be void if the unit is returned in another packaging than the original.

FEATURES

No compromise high-end design
Four inputs
Exclusive, high finish, solid aluminum enclosure
High quality ALPS* volume potentiometer
Audio grade selected op-amps
Capacitor–less output coupling
Highly reliable REED relay input selection
Separate left and right input section
Programmable level adjustment (+6dB) for each input
Headphones output
Output mute function (except phones)
Phono RIAA input section
Phono input can be configured as line input
Switchable monitor output (for tape, CDR, MD..)

PHONO / LINE INPUT SELECTION

The Phono/Aux. Input can be configured for phono level input or for normal line level input.
Default the selection is made for line level.
To change the selection, the unit must be opened.
If you do not feel confident about making the selection by yourself, please ask your dealer to make this selection.

CAUTION: The power-cord must be removed before opening the unit!

Removing the cover

Place the unit horizontal on a flat surface.
Remove the two top screws as in the drawing. Use the supplied Allen wrench.

ALPS is a trademark of the ALPS ELECTRIC CO. LTD.

velleman-8021-High-End-Control-Amplifier-fig-2

Remove the top cover.
At the back a jumper selection is available for the left and the right channel.

For phono input

Mount a jumper between 1-2 and 3-4 for Phono input selection.
This selection must be done both for the left and right channel.

For Line input

Mount a jumper between 2-3 and 4-5 for Line input selection.
This selection must be done both for the left and right channel.

After making the selection the cover can be replaced.

CONNECTION

velleman-8021-High-End-Control-Amplifier-
fig-5

Connect the amplifier inputs to the different sources. Use good quality audio leads. Respect the Left and Right channels. Connect the output to a suitable stereo power amplifier or two mono amplifiers (e.g. our 4020, 4040, or 2x 8010) . Connect the power-cord to the mains connector. Check for correct mains voltage.

At first time power up, or after a mains voltage failure, the +6dB LED will lit together with the standby/mute LED.
Line level is an source with voltages between 150mV and 2V.

OPERATION

CAUTION: Before turning on the power amplifier(s) turn down the volume control.

velleman-8021-High-End-Control-Amplifier-fig-6

The +6dB function can be used to adjust the level between the different sources. That way, when switching over between sources the volume will approximately remain the same.

When the power-cord is disconnected or after a power failure the memory will be erased.

TROUBLESHOOTING

Symptom/ Possible cause

No sound coming from the speakers: Mute is on, press standby/mute button. The power amplifier is turned off. Wrong source is selected.
+6dB memory is erased: A power failure has occurred. The power-cord has been disconnected.
Distorted sound at phono/aux input: Input is wrongly configured.
Hum or noise is coming from the speakers: To make sure the control amplifier is the source of hum, disconnect all input leads. Use good quality audio leads. Check the earth connection of the phono or mains. The control amplifier is too close to the power amplifier or too close to other magnetic field like a power adapter or other mains operated unit.
No button is reacting anymore and/or no LED indication is functioning anymore: Static electricity or lightning can cause malfunction of the unit. Disconnect the power-cord for about 10 seconds, this will reset the internal processor. Check the mains fuse, replace only with indicated rating. A spare fuse is located in the fuse holder.
The tape recorder, MD, CDR… is not receiving a signal: The monitor function is not engaged, press the desired input once again to engage the monitor output.

SPECIFICATIONS

Inputs

Input sensitivity at x4 gain, for 0dB (0.775Vrms) out (appr.)

PHONO: …………………………………………………….. 3mV / 47KO
A/V: …………………………………………………………… 200mV / 50KO
TUNER: ……………………………………………………… 200mV / 50KO
CD: ……………………………………………………………. 200mV / 50KO