User manual ELECTRO-VOICE DH1 DATASHEET

[. . . ] Input channels 1-10 are designed to either be used as low-Z balance microphone or line level inputs. The combination connector on inputs 1-10 permits use of either XLR or ¼" input connectors. The block diagram shown in Figure 2 outlines the signal flow for the MA-1206. [. . . ] The block diagram shown in Figure 2 outlines the signal flow for the MA-1206. A signal appearing at either input 1 will automatically mute the other channels unless the mute function is defeated via a switch on the rear panel. Inputs 11 and 12 are for auxiliary line-level sources such as tape or CD players. Mono or stereo signals may be applied to inputs 11 or 12. The left and right components of a stereo signal can be applied to the dual RCA phono jacks of these inputs and mixed together to drive the builtin monaural power amplifier. A rear panel paging input with gain control is provided for the paging output of a telephone system. An audio signal appearing at this input automatically mutes all other inputs. A signal present channel 1 shall trigger the muting of channels 2-12. The mute circuit shall be defeatable using a switch on the rear panel. Inputs 1 - 10 shall be available via combination female XLR / ¼" connectors. Inputs 11 and 12 shall accept either monaural or stereo sources. If a stereo source is connected, it shall be properly mixed to mono via a resistor network mounted on the input plate. There shall be a paging input that accepts a 600-ohm linelevel feed from a phone system. When a signal is present Technical Specifications: Power Output (at 1 kHz): 60 Watts Frequency Response: 50 Hz - 15 kHz, ±3 dB Input Sensitivity/Impedance, Inputs 1-10 Mic setting: 0. 3 mV/600 ohm (balanced) Inputs 1-10 Line setting: 75 mV/47kohm (balanced) Paging: -20 dBm/600 ohm (transformer isolated) Power Amp In: 1 V/10 kohm (unbalanced) Aux: 100 mV to 1V/ (unbalanced) THD (at rated output): <1% at 1 kHz Signal-to-Noise Ratio, Mic : >52 dB Aux: > 65 dB Paging: > 65 dB Power Amp In: >90 dB Line Output Level/Impedance, Preamp Output: 1 V/1 kohm (unbalanced) Balanced Line Output: 500 mV/47 kohm (unbalanced) Speaker Outputs: 4, 8, 16 ohm, 25, 70. 7 and 100-Volt Tone Controls, Bass: +-10 dB at 100 Hz Treble: +-10 dB at 10 kHz Muting: 40 dB attenuation Protection : 3 independent Slo-Blo ® fuses, primar y ac and dc Power Dissipation: 250 watts Power Supply: 108-132 V ac, 50/60 Hz Dimensions, Height: 13. 3 cm (5. 2 in. ) Width: 48. 0 cm (18. 9 in. ) Depth: 32. 0 cm (12. 6 in. ) Net Weight: 9. 0 kg (19. 8 lb) Shipping Weight: 9. 7 kg (20. 4 lb) Rear View 12000 Portland Avenue South, Burnsville, MN 55337 Phone:952/884-4051, Fax:952/884-0043 www. electrovoice. com © Telex Communications, Inc. [. . . ] There shall be a paging input that accepts a 600-ohm linelevel feed from a phone system. When a signal is present Technical Specifications: Power Output (at 1 kHz): 60 Watts Frequency Response: 50 Hz - 15 kHz, ±3 dB Input Sensitivity/Impedance, Inputs 1-10 Mic setting: 0. 3 mV/600 ohm (balanced) Inputs 1-10 Line setting: 75 mV/47kohm (balanced) Paging: -20 dBm/600 ohm (transformer isolated) Power Amp In: 1 V/10 kohm (unbalanced) Aux: 100 mV to 1V/ (unbalanced) THD (at rated output): <1% at 1 kHz Signal-to-Noise Ratio, Mic : >52 dB Aux: > 65 dB Paging: > 65 dB Power Amp In: >90 dB Line Output Level/Impedance, Preamp Output: 1 V/1 kohm (unbalanced) Balanced Line Output: 500 mV/47 kohm (unbalanced) Speaker Outputs: 4, 8, 16 ohm, 25, 70. 7 and 100-Volt Tone Controls, Bass: +-10 dB at 100 Hz Treble: +-10 dB at 10 kHz Muting: 40 dB attenuation Protection : 3 independent Slo-Blo ® fuses, primar y ac and dc Power Dissipation: 250 watts Power Supply: 108-132 V ac, 50/60 Hz Dimensions, Height: 13. 3 cm (5. 2 in. ) Width: 48. 0 cm (18. 9 in. ) Depth: 32. 0 cm (12. 6 in. ) Net Weight: 9. 0 kg (19. 8 lb) Shipping Weight: 9. 7 kg (20. 4 lb) Rear View 12000 Portland Avenue South, Burnsville, MN 55337 Phone:952/884-4051, Fax:952/884-0043 www. electrovoice. com © Telex Communications, Inc. 4/2002 Part Number 38110-137 Rev A U. S. A. [. . . ]