Stereos Kits

/Stereos Kits
Stereos Kits2016-10-14T09:31:04+00:00
stereo-kits-header

Mars Stereo kits

If you prefer to build your own audio gear, rather than buy ready built units, you are at the right place.

We cater for the first time solderer as well as the seasoned DIY’er.

Our kits come with schematics and layouts to guide you through the assembly.

If you would rather build these kits under knowledgeable supervision, contact us to find out where and when our next DIY workshop will be held.

Learn More About the DIY Workshops

Below you’ll see listed the kits we have available. This includes the stereo integrated amplifiers, as well as phono preamps and headphone amplifiers.

mars-el84pp-kit
Read More About the Mars EL84PP Kit

Mars EL84PP Kit

* 10 watts per channel
* Ultra Linear output transformers accepts 6 to 8 ohm loudspeakers
* 40Hz to 100kHz at full power
* stereo RCA input at back panel
* ALPS Volume pot
* transformers are hand rolled one layer at a time with paper interleaving
* auto bias on each power tube

R7900.00 per kit

Mars Kit 2 Mk 2
Read More About the Mars Kit 2 Mk 2

Mars Kit 2 Mk 2

  • * 35 watts per channel
    * 40Hz to 100kHz at full power
    * 3 Stereo inputs selectable from rotary selector on front panel
    * EL34 power tubes
    * 6SN7 preamp tubes
    * Hand rolled with paper inter-leafing ultra linear output transformer accepts 4 to 8 ohm speakers
    *Auto bias – even unbalanced tubes can be used

R11,900 per kit

mars-kit-2-mk-2-schematics

As you can see from the schematic above, the kit is heavily inspired by the Mullard 5-20, Radford and LEAK. The original 5-20 had more gain, which is problematic with the line level signals most sources today put out. We have replaced the front end pentode with a triode for less gain. The 6SN7 is an octal preamp tube. Octal sockets are easy to solder for first timers, and the key in the tube base helps to stabilise the tube when it is in place. Octal tubes are over all sturdier in their sockets than Noval tubes.

We like cathode biased amplifiers, and also prefer separate cathode resistors, just like the original 5-20.

The circuit is designed to give the highest standard of sound reproduction when used in association with a suitable source and a good-quality loudspeaker system.

Two output pentodes, type EL34, rated at 25W anode dissipation, form the output stage of the circuit. These are connected in a push-pull arrangement with distributed loading, and give a reserve of output power of 35W with a level of harmonic distortion of about  1%. The intermediate stage consists of a cathode-coupled, phase-splitting amplifier using the double triode, type 6SN7. This stage is preceded by a medium-gain voltage amplifier using one half of a double triode type 6SN7. Direct coupling is used between the voltage amplifier and phase splitter to minimise low-frequency phase shifts.

The main feedback loop includes the whole circuit the feedback voltage being derived from the secondary winding of the output transformer and being injected in the cathode circuit of the first triode. The amount of feedback applied around the circuit can be adjusted via selecting different values for the feedback resistor.

The rectifier used in the power-supply stage is a solid state bridge rectifier.

Mars Single Ended 20 watt kit

Mars Single Ended 20 Watt Kit

  • 11 watt per channel single ended amplifier
  • 5U4 rectifier
  • 807, 6L6GC or EL34 power tube
  • single stereo channel input

R9900.00 (South African Rands)

mars-se88-single-ended-kit

Mars SE88 Single Ended kit

  • 16 watt per channel
  • KT88 or 300B power tube
  • 3 stereo inputs
  • Custom wound C-core transformers

R11,900.00 (South African Rands)

Mars Phono Preamplifier Kit

Mars Phono Preamplifier Kit

  • designed for Moving Magnet cartridges
  • uses the ECC83 and ECC81 tubes.
  • high quality capacitors in the power supply
  • solid state rectifiers and metal film resistors for low noise.

R6900.00 (South African Rands)

Mars Octal Phono preamplifer

Mars Octal Phono Preamplifer

  • This preamplifier uses 6SL7 and 6SN7 tubes
  • 6X5 or 5Y3 tube rectifier
  • Adjustable output volume control
  • low output impedance. (You can run long cables to your power amplifiers)
  • could accommodate multiple selectable line level inputs, over and above the phono input.
  • remote control option (contact us for details)
  • High quality parts
  • designed for MM cartridges. Step up transformers for MC cartridges can be catered for; contact us for a quote.

R9900.00 (South African Rands)

This Is A Custom Widget

This Sliding Bar can be switched on or off in theme options, and can take any widget you throw at it or even fill it with your custom HTML Code. Its perfect for grabbing the attention of your viewers. Choose between 1, 2, 3 or 4 columns, set the background color, widget divider color, activate transparency, a top border or fully disable it on desktop and mobile.

This Is A Custom Widget

This Sliding Bar can be switched on or off in theme options, and can take any widget you throw at it or even fill it with your custom HTML Code. Its perfect for grabbing the attention of your viewers. Choose between 1, 2, 3 or 4 columns, set the background color, widget divider color, activate transparency, a top border or fully disable it on desktop and mobile.