The Z158 MC boards have two gain adjustments: (1) labelled “Gain” (with shunt
positions A, B, C) and (2) “Gain Boost” (with pos6db, +3db, 0db). These
allow for a very large range of gain settings to suit most MC cartridge impedances,
which are typically between 3 ohms to 40 ohms. It is recommended that initially
you leave the “Gain Boost” shunt on “+3db” (middle position) while you make
adjustments to the “Gain” shunts on the left. Note, there is only 1 shunt on the “Gain
Boost” pins but the “Gain” pins can have 1, 2 or all 3 shunts installed.
Now, consulting the chart below, you can increase or decrease the gain by
configuring the shunts are shown, moving to the right or left in the chart as desired to
effect the change. For example, if your shunts are positioned as shown in column 3,
reposition them to look like column 4 or higher for more gain.
If, after adjusting the Gain to “most” or “least” from the chart below you still need
more adjustment then move the Gain Boost shunt to the 1
st
or 3
rd
position to add or
reduce gain by another 3 db.
6. Specifications
MM:
•
Frequency response: 20 Hz – 20kHz +/- 0.3db (guaranteed)
•
Channel matching: 1kHz gain /- 0.1db
•
Input impedance: 47k ohms / 100pf. (adjustable)
•
Voltage mode gain: 40db (nominal) (adjustable)
MC:
•
Frequency response: 20 Hz – 20kHz +/- 0.3db (guaranteed)
•
Channel matching: 1kHz gain /- 0.1db
•
Cartridge internal impedance range: 3 to 40 ohms
•
Total gain: 60db +/- 8db (adjustable, cartridge dependent)
RSL Phono-Stage Owner’s Manual
V1.4 - April 2019
Ryan Sound Lab, LLC
Arlington, Virginia USA
1.
Congratulations!
Congratulations on your purchase of the RSL Phono-Stage. This unit will bring your
turntable music to life with its dynamics, clarity and tonality. It has been tested and
listened to before shipping and should sound excellent right from the start, but we
recommend allowing up to 2 weeks for “burn-in” to get the best sound.
2.
Warranty
Your new RSL Phono-Stage was engineered and hand-crafted with care, then tested,
and carefully packed for delivery to you. It is warranted for 2 years from the date of
purchase against defects in materials and workmanship. During the warranty period,
Ryan Sound Lab will repair or replace any defective part(s) in the Preamp and Power
Supply at no cost to you. Please save the original packaging in the unlikely event
that the whole unit would need to be returned. If there appears to be a problem,
please first contact Ryan Sound Lab at info@ryansoundlab.com.
In addition, the RSL Phono-Stage are guaranteed to meet or exceed your
expectations for 60 days from the date of purchase. During that period, if for any
reason you are not completely satisfied with your purchase, simply return the unit(s)
for a full refund. You pay only return shipping.
Also, please be aware that RSL cannot be held liable for consequential damages to
other equipment. RSL's liability is limited to the cost of the RSL equipment.
3.
Safety notes regarding the power supply
!
Your unit was shipped with a separate linear power supply set for the proper
voltage for your country. Please verify you have the correct voltage by referring to
the sticker on the rear panel before plugging it in. Plugging in a 115v power supply
to 230v mains may result in permanent damage to your unit.
