YAMAHA KM802 MIXER

Safety Instruction

1. Read Instructions-All the safety and operating instructions should be read before the appliance is operated.
2. Retain Instructions-The safety and operating instructions should be retained for future reference.
3. Heed Warnings-All warnings on the appliance and in the operating instructions should be adhered to.
4. Follow Instructions-All operating and use instructions should be followed.
5. Water and Moisture-The appliance should not be used near water-for example, near a bathtub, washbowl, kitchen sink, laundry tub, in a wet basement, or near a swimming pool, etc.
6. Carts and Stands-The appliance should be used only with a cart or stand that is recommended by the manufacturer.
7. Wall or Ceiling Mounting-The appliance should be mounted to a wall or ceiling only as recommended by the manufacturer.
8. Ventilation-The appliance should be situated so that its location or position does not interfere with its proper ventilation. For example, the appliance should not be situated on a bed, sofa, rug, or similar surface that may block the ventilation openings; or, placed in a built-in installation, such as a bookcase or cabient that may impede the flow of air through the ventilation openings.
9. Heat-The appliance should be situated away from heat sources such as radiators, heat registers, stoves, or other appliances (including amplifiers) that produce heat.
10. Power Sources-The appliance should be connected to a power supply only of the type described in the operating instructions or as marked on the appliance.
11. Power-Cord Protection-Power-supply cords should be routed so that they are not likely to be walked on or pinched by items placed upon or against them, paying particular attention to cords at plugs, convenience receptacles, and the point where they exit from the appliance.
12. Cleaning-The appliance should be cleaned only as recommended by the manufacturer.
13. Nonuse Periods-The power cord of the appliance should be unplugged from the outlet when left unused for a long period of time.
14. Object and Liquid Entry-Care should be taken so that objects do not fall into and liquids are not spilled into the inside of the appliance.
15. Damage Requiring Service-The appliance should be serviced by qualified service personnel when:
    • A. The power-supply cord or the plug has been damaged; or
    • B. Objects have fallen, or liquid has been spilled into the appliance; or
    • C. The appliance has been exposed to rain; or
    • D. The appliance does not appear to operate normally or exhibits a marked change in performance; or
    • E. The appliance has been dropped, or the enclosure damaged.
16. Servicing-The user should not attempt to service the appliance beyond that described in the operating instructions. All other servicing should be referred to qualified service personnel.

Control Panel Operation

Input Section

Inputs 1 and 2 are ideal for use with microphones or other low level sources, since they have adjustable gain and a clip indicator.

• ① CLIP: These LEDs will light when the input signal reaches 3dB below clipping level.
• ② GAIN: This lets you adjust the input sensitivity to cover a wide range of sources. Gain is adjustable from -50 to -10dB. Microphones will require the most gain, so set this control to the right. Line-level instruments such as synthesizers already have a high output level, so set this control to the left. You can get the best signal-to-noise ratio for each source by adjusting gain so that the clip LED lights only occasionally.
• ③ HI and LO EQ: These alter the frequency response of the channel with up to ±15dB of shelving equalization at 10kHz (HI) and 100Hz (LO). Center position is normal (no effect).
• ④ AUX 3: This sends the post-fader signal to the aux 3 output.
• ⑤ PAN: This sets the stereo position of the post-fader signal.
• ⑥ CHANNEL FADER: This controls the output of the channel.

Inputs 3-8

• ⑦ AUX 1, 2, 3: These send the post-fader signal to the aux outputs 1, 2 and 3.
• ⑧ PAN: This sets the stereo position of the post-fader signal.
• ⑨ CHANNEL FADER: This controls the output of the channel.
• ⑩ MARKING SPACE: You can ID the channels by writing on masking tape.

Block Diagram

A block diagram illustrating the signal flow within the KM802 mixer.

Rear Panel

• ① POWER SWITCH: When the power is turned on, the first segment of the LED level meters will light.
• ② PHONES: This outputs the stereo signal from the phones fader. Any standard stereo headphones can be used.
• ③ INPUT 1, 2: Standard 1/4" phone plug for less than 10k-ohm line or 50-600 ohm microphone input.
• ④ INPUT 3-8: Standard 1/4" phone plug for less than 10k-ohm line input.
• ⑤ STEREO OUT L, R: This outputs the signal from the stereo master fader L and R.
• ⑥ AUX SEND 1, 2 (channels 3-8), 3 (channels 1-8): These output the combined signals of the channel aux send controls.
• ⑦ AUX RETURN 1, 2, 3 (L, R): Signals input here are sent to the aux returns 1, 2, 3. If only one source is plugged in (L or R), it is treated as a mono source and sent to both L and R of the aux return.

Example Setup

Since the KM802 has stereo return for each aux send, it is especially useful with effects that have a stereo output. Here is an example using two stereo effectors and a reverb unit. You could set one effector to an echo effect and the other to a chorus effect. Adjusting the channel aux controls would determine the level of effect for that channel, and aux return 1, 2, 3 would determine the overall level of the effect.

This setup shows how you can use the KM802 to mixdown a multi-track sequence. Using FM Music Composer with the Music Computer (and FM Sound Synthesizer Unit), you can program a song with up to 8 parts. This can be synchronized with external MIDI instruments such as a Synthesizer, Rhythm Programmer and Tone Generator. For instance the Synthesizer might be set to play the melody and the Tone Generator a piano backing. The remaining parts could be played by the Music Computer's internal Tone Generator. The Rhythm Programmer would receive the MIDI synchronization signal from the Music Computer and keep perfect time with the song.

You can connect the KM802 L and R outputs to a tape deck and mix everything down to a 2-track master recording, while you and a friend sing along using the microphones.

Specifications

Frequency Response

(10 k-ohms) 20Hz~20kHz, 0dB (STEREO OUT) / -10dB (AUX SEND 1-3) (+1, -2dB)

Total Harmonic Distortion

(20Hz~20kHz, 10 k-ohms, +10dB) Less than 0.05%

Hum & Noise (20Hz~20kHz)

Rs=150 ohms, GAIN=MAX. (CH 1, 2)

• Input Noise (CH 1, 2): -122dB Equivalent
• Residual Output Noise (STEREO OUT): -90dB
• STEREO OUT Master fader at nominal and all CH fader at minimum: -76dB
• STEREO OUT Master fader and CH 1 or 2 fader at nominal level: -72dB
• AUX SEND All CH AUX level controls at minimum level: -88dB
• AUX SEND CH 1 or 2 fader and AUX level control at nominal level: -82dB

Crosstalk (1kHz)

• Adjacent Input: -60dB
• Input to Output: -60dB

Maximum Voltage Gain

• CH 1, 2 IN to STEREO OUT: 62dB
• CH 3-8 IN to STEREO OUT: 22dB
• AUX RETURN to STEREO OUT: 32dB
• CH 1, 2 IN to AUX SEND: 52dB
• CH 3-8 IN to AUX SEND: 12dB

CH 1, 2 Equalizer

• HI: 10kHz shelving ±15dB Maximum
• LO: 100Hz shelving

Power Requirements

• (UL, U.S.A.): AC120V, 60Hz
• (General): AC110, 120, 220, 240V, 50/60Hz

Dimensions (W x H x D)

354 x 85 x 303 mm (13-15/16" x 3-5/8" x 11-15/16")

Weight

2.6 kg (5 lbs. 7 oz.)

* Hum & Noise are measured with 6dB/octave filter at 12.7kHz: equivalent to a 20kHz filter with infinite dB/octave attenuation.

** 0dB is referenced to 0.775V rms.

Input Characteristics

(1) Sensitivity is the lowest level that will produce an output of 0dB (0.775V), or the nominal output level when the unit is set to maximum gain.

Output Characteristics

(2) 0dB is referenced to 0.775V.

Service

The KM802 are supported by Yamaha's worldwide network of factory trained and qualified dealer service personnel. In the event of a problem, contact your nearest Yamaha dealer.