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White you may already have begun using the unit, we urge you to read this manual thoroughly, and to re-read it as you become more familiar with the EM-85's features and functions. WARNING: To reduce the risk of fire or electric shock, do not expose this appliance to rain or moisture. TABLE OF CONTENTS INTRODUCTION..................................................1 SPECIFICATIONS..................................................2 BRIEF OPERATING INSTRUCTIONS FRONT PANEL................................................3 REAR PANEL..................................................5 GETTING THE MOST FROM THE BUILT-IN ANALOG DELAY LINE..........................................7 SETTINGUP....................................7 APPLICATIONS....................................................8 BLOCK DIAGRAM................................................10 INTRODUCTION The Yamaha EM-85 is an integrated mixer with a built-in power amplifier, 200 millisecond analog delay line, and RIAA phono preamp. There are four regular mic/instm-ment/line input channels. Each of these channels has a two-frequency equalizer, an echo (delay) send, a 3-position input selector for use with mics, instruments and lines, and a rotary volume control. A fifth input channel is switchable for either of two auxiliary line inputs or a phonograph input (mono or stereo). The mixer’s solid state power amplifier delivers 45 watts (RMS) into 8 ohms or 70 watts into 4 ohms, and there are two parallel speaker outputs, each having both a phone jack and push-terminals. This provides the greatest compatibility, speed and ease of set up. There are also line output and recorder output jacks for feeding additional amplifiers, other mixers, tape recorders, and so forth. NOTE: In this manual, where a specific signal level is described in dB, OdB is referenced to 0.775 volts RMS. 1 SPECIFICATIONS GENERAL SPECIFICATIONS MAXIMUM OUTPUT POWER FREQUENCY RESPONSE TOTAL HARMONIC DISTORTION (THD) INTERMODULATION DISTORTION * HUM and NOISE (20 Hz to 20 kHz, 150 ohms source) MAXIMUM VOLTAGE GAIN (Input Selectors set at Mic position). EQUALIZATION CROSSTALK ANALOG DELAY LINE POWER REQUIREMENTS POWER CONSUMPTIONS DIMENSIONS WEIGHT 70 watts into 4 ohms, or 45 watts into 8 ohms, continuous average sine wave (RMS). ± 1dB, 30 Hz to 10 kHz or + 1, —4dB, 20 Hz to 20 kHz, (35W, 4i2) @35 watts into 4 ohms. Less than 0.5% 50 Hz to 10 kHz, Less than 0.2% @1 kHz, @35 watts into 4 ohms. Less than 0.5%, (70 Hz : 70 kHz = 4:1) @35 watts into 4 ohms. ** —116dB Equivalent input noise; —38dB residual output noise, Master Volume and one Input Volume at max. -42dB residual output noise, Master Volume at max and all Input Volume controls at min. 77dB, Channel In to Speaker Out. 50dB, Channel In to Line Out. 47dB, Channel In to Record Out. 47dB, Aux In to Speaker Out. 77dB, Phono In to Speaker Out. BASS ± 12dB @100 Hz, shelving. TREBLE ±12dB@10kHz, shelving. —60dB @1 kHz, adjacent inputs. 100 to 200 milliseconds, continuously variable, and with variable feedback. US & Canadian models 120 volts, 50/60 Hz General model 110, 130, 220 or 240 volts, 50/60 Hz US & Canadian models 120 watts General model 185 watts 16-1/8" W x 9-1/2" D x 8-3/4" H, (410 mm W x 242 mm D x 225 mm H). 20 pounds (9.2 kg). * Compensated with a 6dB/octave filter &12.47 kHz. ** In these specifications, OdB is referenced to 0.775 volts RMS. Specifications are subject to change without notice. INPUT CHARACTERISTICS Connection Actual Load For Use with Input Level Connector Impedance Nominal Nominal Max. before clip INPUTS (1 ~ 4CH) MIC INST LINE 50k£2 150 ~ 3ki2 Sources —50dB (2.5mV) —35dB (14mV) —20dB (78mV) —22dB (62mV) - 7dB (346mV) + 8dB (1.93V) Phone Jack AUX INPUTS (CH5) AUX IN 1 AUX IN 2 PHONO 30ki2 30k£2 47ki2 5kf2 5k£2 mag. cart. —20dB (78mV) —20dB (78mV) —50dB (2.5mV) —22dB (62mV) Phone Jack 2 x Pin Jack 2 x Pin Jack OUTPUT CHARACTERISTICS Connector Actual Source For Use with Output Level Connector Impedance Nominal Nominal Max. before clip SPEAKER 1 and/or 2 0.2Î2 4£2 & up - 4Î2 70W 8£2 45W Phone Jack Terminals LINE OUT 100Î2 10k£2 & up OdB (775mV) - Phone Jack REC. OUT 2.2kS2 10ki2 & up —3dB (550mV) + 15dB (4.94V) Pin Jack In these specifications, OdB is referenced to 0.775 volts RMS. 2 BRIEF OPERATING INSTRUCTIONS NOTE: Make all signal and speaker connections before turning on the AC POWER switch. FIG. 1. FRONT PANEL INPUT CHANNEL (Typical of Input channels 1 through 4) O Input Jack This 1/4" (6.3 mm) tip-sleeve phone jack accepts signal for the channel input. The inputs are unbalanced. ©Volume This control sets the channel's mix level. © Input Selector Switch This slide-switch adjusts the input jack's sensitivity for best results with different input sources. "Line" position is for tape machine outputs and high level synthesizers with nominal —20 dB output level. "Inst" position is for guitars, electric pianos, and other keyb...