Callisto is our next generation high end phono preamp, replacing our popular Janis series.
Callisto is a 6922/E88CC tube phono preamp. 6DJ8's can also be used and if you prefer, we would be happy to use your supplied 6DJ8's. In this case, we would of course adjust the final price of Callisto.
It is housed in an all American Landfall Systems aluminum chassis for optimum shielding.
Two versions of Callisto are offered.
The first version will have both MM and MC inputs, (selectable) using a pair of Lundahl SUT's (Step Up Transformers), complete with 8 step selectable input loading to closely match the cartridge used, see below.
The following Lundahl SUT's are offered. LL1931, LL1933 and LL1941. This will give user selectable gain range of 8,16,18, 24 or 38dB using a mini toggle switch located on the input pcb, depending on the model SUT used. Note, each model SUT will give TWO sets of gain ranges.
For example, SUT model LL1931 can be configured for a gain of either 8 or 16, so this mini toggle switch allows the user to choose between those two gain settings. This means that a number of different MC cartridges can be used for any given model SUT.
Each of these model SUT's are also available in Silver Wire for additional cost, see pricing below.
The second version is for MM cartridges only which will have a simplified rear panel with no switches, just RCA in and outputs.
The 6922 preamp design uses a combination ultra low noise LSK380 JFET and tube cascode input stage with an Aikido-style output buffer. A solid state CCS (Constant Current Source) is used in the second stage.
The power supplies are regulated solid state DC, driven by a toroidal power transformer custom made for Erhard Audio.
Coupling capacitors are Mundorf MCap EVO's, signal path resistors are Vishay and TE Connectivity high precision film types.
This is a no compromise design which will give you hours of amazing vinyl listening pleasure!
Specifications:
MM Gain is 40dB
MC Gain will depend on the SUT used, 55dB+
RIAA response is flat across the audio band, down 1dB at 10Hz and 0.1dB at 40KHz
Input impedance is 47K for MM and user selectable for MC depending on the SUT and cartridge in use
Power consumption: 32W
Chassis size: 14"W x 12"D x 3.25"H
Weight: 12lb
Base price, MM only: $2,050.00
Callisto Phono Preamp
Lundahl Transformers
LL1933Ag, Silver Wire: + $2,420.00
LL1931: + 575.00
LL1931Ag, Silver Wire: + 2,400.00
LL1941: + $575.00
LL1933: + $445.00
Base price, MM&MC: $2,850.00
You MUST add one of the SUT transformer options listed below
LL1941Ag, Silver Wire: + $2,400.00
Please contact us with details about your MC cartridge so that we can work out which Lundahl SUT is best suited for your Callisto, unless you already know which model you need, then just add the model to your PayPal cart.
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Erhard Audio