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Gain settings - DIPswitches 10 - 11 -12
The output of different phono cartridges may vary a lot. There are low output moving coil car-
tridges with as little as 0,05 mV output and there are high output moving magnet cartridges with
up against 10,00 mV output. The ECP 2 will work with both of these extremes, and everything in
between. With cartridges having very low output, you simply have to crank up the volume on your
amplifier a little more.
“To find the amplification factor (ratio) you need - divide 1,0 V RCA (2,0 V XLR) (to match most
modern line sources) with the output of your cartridge. Go for the closest gain setting (above (if your
line stage can handle the voltage) or below) that result.”
Example: If your cartridge have an output on 2,2 mV –
you will need; 1,0 V / 2,2 mV = 454 x amplification.
Go up to 944x/59,5 dB gain, or down to 372x/51,4 dB.
The phono stage will then amplify the signal to:
2,2 mV x 944x = 2,08 V (RCA) or
2,2 mV x 372x = 0,81 V (RCA).
The gain of the ECP 2 phono stage is set by adjusting the tree DIPswitches labeled GAIN (number
10 - 11 -12) on the back of your unit. With these tree switches, you may get a variety of different
gain settings. (For XLR output – add 6 dB gain).
Gain
dB
Amplification
factor (ratio)
DIPswitch 10
( +20 dB)
DIPswitch 11
( -10 dB)
DIPswitch 12
( -5 dB)
71,4 3.715 x X - -
66,4 2.089 x X - X
61,4 1.175 x X X -
59,5 944 x X X X
51,4 372 x - - -
46,4 209 x - - X
41,4 120 x - X -
39,8 98 x - X X
X = ON (Down) - = OFF (Up)
Resistance loading (RL) - DIPswitches 4 - 5 - 6 - 7 - 8 - 9
Like output, the internal resistance of cartridges may vary a lot. Check the cartridges specifications
sheet for the cartridges internal resistance/coin resistance in Ohms, and the manufacturer’s recom-
mendations for loading in Ohms.
Theoretically a cartridge should “be loaded” with an input resistance 10 -20 times greater than its own
internal resistance / coin resistance. The input resistance, divided by the output resistance of the source,
is called damping factor. Like all things theoretical, this setting may not necessarily give you the best
sound quality - or the sound quality you are looking for. Some cartridges sound better with a dampening
factor greater than 20. Fortunately, you may “play around” with the resistance settings without causing
damage to the cartridge or the phono stage. Find the setting that suits you the best.
The resistance loading (RL) of the ECP 2 phono stage is set by adjusting the six DIPswitches labeled
RL (number 4 - 5 - 6 - 7 - 8 - 9) - on the back of your unit. With six DIPswitches - and six fixed val-
ues of resistors - you get a variety of different usable settings:
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