Inspired by the 1081 EQ points using the same inductor specifications.Class A transformer-coupled.Hand wired, all discrete using modular cards.4-band with HPF.Low and High Mid-band overlapping frequencies.Extended selection for high frequency shelving.High quality Swiss made Elma® rotary switches.
80dB Class A Microphone preamplifier, HI-LO selectable input impedance, balanced and floating.
+/-16dB selectable frequency shelving at 10, 12 or 16 kHz.
+/-16dB with selectable frequency shelving of 35Hz, 60Hz, 110Hz & 220Hz.
1081 Upper Mid Frequency:
+/-18dB peaking, fixed 'Q' , selectable centre frequencies of 1.5Khz, 1.8kHz, 2.2Khz, 2.7kHz, 3.3Khz, 3.9kHz, 4.7kHz, 5.6kHz , 6.8kHz and 8.2Khz , inductor based.
1081 Lower Mid Frequency:
+/-18dB peaking, fixed ´Q´, selectable center frequencies of 220Hz, 270Hz, 330Hz, 390Hz, 470Hz, 560Hz, 680Hz, 820Hz, 1000Hz and 1200Hz, , inductor based.
High Pass Filter:
18dB per octave slope, switchable between 50Hz, 80Hz & 300Hz, inductor based.
Engages the equalizer.
Mic Input Impedance:
HI, 1200 Ohm minimum, LO, 300 Ohm.
Line Input Impedance:
10KOhms bridging, transformer balanced and floating.
Less than 75 Ohms, transformer balanced and floating, to drive a load of 600 Ohms.
Greater than +26dBm into 600 Ohms, greater than +32dBu into 10KOhms.
Less than 0.025% at 1Khz, Less than 0.05% at 100Hz.
20Hz (+0.3dB) to 20Khz (-0.2dB).
Slightly greater than 80dB.
Less than -100dBm.
110 mA @24VDC.