ASR emitter - Adjusting the ASR plug-in phonoboard

ASR Audiosystems Friedrich Schaefer, D-35727 Herborn, Germany
High End Integrated Amplifier ASR Emitter Page 9
The ASR plug-in phonoboard can be retrofitted. Simply follow the described steps:
- before you put the phonoboard into the ASR Emitter, please adjust it acoording to the
cartridge you are using (see 2.2.2.1)
- turn off the ASR Emitter (left control knob to „0“-position) and disconnect the
powercords from the AC outlet, disconnect the powercord(s) from the AC input of the
power supply/supplies
- carefully release the bolts of the topplate of the ASR Emitter (inside the heatsinks) and
remove the topplate
- at the end of the pc-board in the middle (view from the front) there are two black 10fold
sockets (right were the word „phono“ is written on the pcb); there are two bridge-wires
in this sockets (one for each channel) - carefully remove this bridge-wires
- carefully insert the ASR plug-in phonoboard into the two black 10fold sockets; the
parts on the phonoboard facing the frontpanel of the ASR Emitter)
2.2.2.1 Adjusting the ASR plug-in phonoboard
There is a 6fold DIP switch for each channel in the middle of the phonoboard to adjust the
phonoboard according to your cartridge. The input resistance can be adjusted on DIP
switches no. 1 and 2, the gain can be adjusted on the DIP switches no. 3 to 6.
a) the DIP switches have two different settings: „on“ or „off“; be sure, that the switches
are correctly set (when set correctly, you will hear a slight „klick“)
b) please set the DIP switches exactly the same for the right and the left channel (only
exception from this rule: your cartridge needs to be balanced because of different
output from the right and left channel)
c) the ASR plug-in phonoboard was not developed to work with very low output MC
cartridges
Adjusting the input resistance
We know from experience that if you are using an adjustment with a lower input resistance
the ambiance is improved with limited dynamics, with a higher inputresistance the overall
performance is brighter and more dynamic, but definition and precision are limited. You
can easily find out the perfect setting for you: make an adjustment and listen to the
system. the best adjustment is the one you like best!
DIP switch no. 1 2 Input resistance
47kΩ −− −− for MM- und High Output MC cartridges
100kΩ −− ON for medium output MC cartridges (Denon/Yamaha)
22 Ω ΟΝ −− for low output MC cartridges (Ortofon MC 200)
18 Ω ΟΝ ΟΝ for very low output MC cartridges (limited)