Supercharger 750K | INSTALLATION |
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SETTING UP
Position the 750K on a stable, horizontal surface where there is no risk of it being knocked.
The unit is supplied with three spikes which should be fitted on setting up. They should be screwed into the matching holes in the base until
We have also supplied a wire so the unit can be situated close to the speaker and use the existing amplifier’s speaker wire as the inputs Make sure ALL units involved are switched off and unplugged from mains supply before making or removing any connections.
During normal use, the unit develops a certain amount of internal heat and therefore should be sensibly situated where it can radiate this heat most efficiently. If this is not realised, heat
AUDIO CONNECTIONS
Inputs: The 750K has one line level RCA input, a XLR balanced line input, and a speaker level input for power boosting. Choose the input to be used, speaker level or line RCA/XLR level:
FOR SPEAKER LEVEL INPUT:
The speaker input allows direct connection from an existing amplifier’s speaker outputs. This provides a low impedance input that the amplifier can drive easily, with greatly reduced distortion (It’s now approximately 10 times less work for the existing amplifier to drive).
Disconnect the existing amplifier speaker wires at the speaker ends. These ends will now be connected to the speaker level input terminals of the Supercharger 750K.
Make sure that the positive lead is connected to the red input terminal, and the negative lead to the black input terminal of the Supercharger 750K
Some cables have an identifying mark to help set up the equipment correctly.
Make sure the input selector slide switch on the back panel is set to
SPEAKER
Supercharger 750K | Loudspeaker |
Recommended wiring of Supercharger 750K for speaker input
Issue 3
LINE LEVEL INPUT:
The 750 K allows for two types of line level signal input, RCA (single ended) and XLR (balanced).
The RCA line input allows single ended direct connection from a preamplifier or amplifier’s preamp outputs (47K input impedance). Use a single phono to phono cable to connect output on the preamplifier output to the line level input on the 750K. Make sure the input selector slide switch on the back panel is set to LINE, and the vertical RCA/XLR switch is set to RCA
The XLR line input allows balanced connection from a preamplifier or amplifier’s balanced preamp outputs (47K input impedance).
Use a single balanced (all pins connected) cable to connect output on the preamplifier output to the XLR balanced line level input on the 750K. Make sure the input selector slide switch on the back panel is set to LINE, and the vertical RCA/XLR switch is set to XLR Note: in both input cases it is assumed that the driving amplifier or preamplifier have a VOLUME CONTROL to allow setting of listening level. This is important as the 750K has no control of its own.
OUTPUTS:
Connect loudspeakers to the terminals near the base of the back panel marked as OUTPUT TO SPEAKER. For setups using more than one 750K it is important to get the phase of these leads correct in all units.
Use the RED ends of the supplied brown cable to connect positive on the Supercharger output to the positive binding post on the speaker, and the BLACK ends to connect the negative on the Supercharger output to the negative binding post on the speaker.
MAINS POWER INPUT
Check the rear panel mains switch is set to “off”. Connect the supplied mains lead to the IEC socket near base of back panel. Connect the other end to a mains power socket.
CAUTION!!
This unit features a BRIDGED output and should NOT be grounded on either output terminal as both are effectively “hot”. Please check if using any active “sub”, electrostatic, or other non standard speaker types directly connected to the outputs of the Supercharger 750K. Consult speaker manual or supplier if in doubt.
Most high quality speakers will comfortably cope with large power transients. By their nature, these are very quick and will present no thermal problems for a good commercial quality loudspeaker.
However please note that most loudspeakers are not designed for very high sustained listening levels. The Supercharger 750K is a very powerful amplifier and will faithfully deliver what is asked of it. If listening levels are set significantly higher (plus 3dB or so, double the power) than normal, it is possible that the loudspeakers could get into thermal problems and be damaged. Musical Fidelity will not be responsible for any loss or damage to loudspeakers.
Please take care with listening levels, which can damage hearing, and consider the noise suffered by others, such as neighbours.
The object of the Supercharger 750K is to increase dynamic range. All that needs to be done is to set the volume level to normal level and the Supercharger will do the rest: providing dramatically increased dynamic range with very low distortion.
Additional note-
If
CLEANING
Before cleaning the unit, switch off power at the mains switch and remove the mains plug from the wall socket.
Clean the cabinet and remote control unit using a moist cloth. We do not advise using solvents, white spirit or thinners as they could damage the surface finish.
