2015 "Recommended Components"
"This diminutive JLTi Phono Preamp offers MM and MC compatibility and
[with] loading via resistor fitted RCA plugs... the JLTi produced a warm
sound with impressive low-level detail... among the best value currently
available in MM/MC Phono Preamps."
MARK 5 !!!
$500 to Upgrade ALL Previous Models
The “Solid Diamond” Phono Stage
(Australian No-Frills Version)
Now AUD $990.00
(now Free Shipping World-Wide)
(The Swiss version was originally USD
$1795.00 or AUD $2000.00)
The original JLTi Phono Stage was designed here
in Australia and the earliest manufacturing runs were done here in Sydney.
Eventually, manufacturing were transferred to Vacuum State Electronics in
Switzerland. Alas, since the co-designer Allen Wright is no longer with
us, it has been decided to make the Australian version available again as
the Swiss version is no longer made. The Swiss JLTi Phono was sold for USD
$1795 - the Oz version is a No-Frills version (in no way does this imply it is inferior
sonically, simply lower cost metal-work etc).
December 2016 NEWS:
We are developing an
Optional External DC Power Supply
for the No-Frills Phono Stage. It is expected to sell for AUD $800 (less
AUD $30 for trade-in AC Plugpack) and this will be quite a bit less cost
that the Swiss made option. But we also wanted to make it better
performance as well as lower cost. This new supply will be based on
Inductors and less reliance on Capacitance - the improvement is super low
ripple and sine wave rather than noisy sawtooth, hence dramatically lower
noise measured in microVolts. Older units can be updated, but needs to be
returned. More info, please email.
The JLTi Phono Stage is unlike
any other Phono belying what it does in an unassuming way.
The name denotes that this is a Solid State device using something
that is called Diamond Transistor Theory, rarely used on High-End Audio
products. The most simple and linear audio voltage amplification device is
a Vacuum Triode which consists of three electrodes only. They are the Grid
(input), Cathode (grounding) and Anode (output). On the other hand, the
Solid State Transistor is a current device but is nowhere near as linear
as the Triode. It consists of Base (input), Emitter (grounding) and
Collector (output). The idea behind a Diamond Transistor is actually a
composite circuit that emulates the near perfect and linear Transistor as
a current device with the same three electrodes in the circuit then
becomes the equivalent of the Base, Emitter and Collector followed by a
Unity Gain Buffer.
Our Diamond Transistor eschews feedback completely and uses
The JLTi Phono Stage is at once a very advanced concept and yet
also elegant in its simplicity when executed properly. The Power Supply is
pure Class A Constant Current “SuperReg” as developed by Vacuum State
Electronics and now increasingly been copied in High-End Audio.
The JLTi Phono Stage is easy and straightforward in operation. It
does not have any On/Off Switch and designed to be left permanently On.
Only when away on holidays, it may be advisable to disconnect from the
Mains Supply (same as with other electrical appliances).
Inputs for both Moving Coil and Moving Magnet cartridges
Load Sockets to Optimise Cartridge Performance
Two Gain Levels, marked MC (Moving Coil) and MM (Moving Magnet)
Optional: 2 Loading Plugs 100 Ohm
The Optional Loading Plugs are for standard value 100 Ohm load of
Moving Coil cartridges. The Earth Binding post is where the Ground from
Turntable can be connected.
The input defaults to standard 47K Load, but with 100 Ohm Loading
Plugs is for setting up most Moving Coil Cartridges as recommended. But
the purpose of the Load Sockets is to experiment with different value Load
Resistors which can be soldered into RCA Plugs and then inserted. Changing
this Load Value in turn changes the minute electro-mechanical damping of
the cartridge and can be tuned by experimentation to obtain the best
sound. Typically, some Moving Coil cartridges sound at their best with as
low as 10 Ohm Load rather than the usually recommended 100 Ohm. Others at
33 Ohm etc.
Optimising Moving Magnet cartridges can go as low as 2K Ohm, and
High Output Moving Coil even much lower. By using trial and error and
careful listening, the potential best performance can be attained for your
expensive investment, as good quality cartridges (and turntables) are not
cheap. The rule is simple, the lower the Load Value, the higher the
damping. Listen to the effect of increased damping and you will soon
discover the sonic effect and how to arrive at the best result. Most
cartridges are listened to under-damped and you can benefit from listening
to optimised damping. Improve your sonic performance at no significant
JLTi Products by
listening has been most pleasurable... I find the JLTi
[Phono] resolves an amazing amount of detail. It also captures an
extended bass response and a large hall ambience. My favorite test for
these last two characteristics is found on side two of "The Mission", a
soundtrack recording. A concert bass drum is played on a couple of the
tracks. With the JLTi, one hears not only the deep note of this
very large drum, but the attack and decay as the
mallet strikes the drum skin, then the sense of space from the recording
studio as each note fades away are fully revealed...most tracks are
interesting and fun to listen to.
Tim P, California