Lightspeed 705iR Portable Infrared Audio System

System Components

Diagram Description: The system includes the 705iR Receiver/Amplifier, Power Supply, and Carry Bag. It also includes the REDMIKE Classroom Microphone, Charging Cradle and Power Supply, and optional accessories like the LT-71 LightMic and HM-70 Handheld Microphone with their respective charger cables.

Helpful Hint: Keep ALL packaging materials. If the system must be returned, using the original packing material will be quick, convenient and prevent damage.

705iR Controls and Connections (Top Panel)

Diagram Description: An image shows the top panel of the 705iR unit with numbered controls.

1. CH A POWER: This knob turns on the power for the 705iR and controls the Channel A volume. Recommended for single microphone use. Turn clockwise to increase volume.
2. CH A LED: Located above the CH A POWER knob, this LED turns red momentarily when power is ON. It glows green when a signal from a Channel A transmitter is received.
3. CH B VOLUME: This knob controls the volume for Channel B. Turn clockwise to increase volume. Use for a second microphone.
4. CH B LED: Located above the CH B VOLUME knob, this LED glows green to indicate a signal is being received from a Channel B microphone/transmitter.
5. TREBLE: Controls the high-frequency sound.
6. BASS: Controls the low-frequency sound.
7. AUX IN VOLUME: Controls the volume level of an external audio source plugged into the AUX IN jack (e.g., computer, iPod, CD player).
8. AUX INPUT JACK: A 3.5 mm jack for connecting an external audio source.
9. AUX OUTPUT JACK: A 3.5 mm jack providing a line-level audio output for connection to a personal FM system or tape recorder.
10. AUX OUT VOLUME: Controls the audio level going to external equipment plugged into the AUX OUT jack.

705iR Controls and Connections (Rear Panel)

Diagram Description: An image shows the rear panel of the 705iR unit with numbered connections.

1. TRANSMITTER CHARGING JACKS: Connects charging cable for optional LightMic transmitter or HM-70 handheld microphone.
2. EXTERNAL IR SENSOR JACK: For connection of an additional sensor for larger or odd-shaped rooms.
3. CHARGING LED: Glows red when the 705iR battery is charging, glows green when fully charged.
4. DC POWER INPUT JACK: Connects to the 16 V AC/DC adaptor for charging or powering the unit.

REDMIKE Controls and Connections

Diagram Description: An image shows the REDMIKE microphone with numbered controls.

1. POWER BUTTON: Press to turn ON, press again to turn OFF (mute).
2. POWER/LOW BATTERY INDICATOR: BLUE light indicates ON and fully charged. RED light indicates charge is needed.
3. BATTERY COMPARTMENT: Slide door downward to access. Use only Lightspeed AA rechargeable sensing battery (part # BA-NH2A27).
4. AUDIO/MICROPHONE INPUT: Input for laptop, MP3 player, or other audio source to transmit wirelessly. An external microphone can also be connected.
5. CHANNEL SELECT SWITCH (CH A/B): Selects Channel A or B. Recommended Channel A for single microphone use.
6. CHARGER CONTACTS (+ -): Interface with charging tabs in the BC-RMCC cradle charger. Place REDMIKE in charger for daily charging.

Cradle Charger Controls and Connections

Diagram Description: An image shows the cradle charger with numbered ports.

1. CHARGE INDICATORS: Light glows RED while charging, GREEN when fully charged.
2. DC POWER PORT: Connect the DC power cord here.
3. OPTIONAL CHARGING PORT: Plug charging cord for optional LT-71 or HM-70 microphones here.

Optional LT-71 Controls and Connections

Diagram Description: An image shows the LT-71 microphone with numbered controls.

1. ON/OFF/MUTE Switch: Turns LT-71 ON or OFF (mute).
2. Channel Select Switch (CH A/B): Selects Channel A or B. Recommended Channel A for single microphone use.
3. Power/Charge Indicator: Light glows BLUE when ON, RED when charging.
4. External Microphone Input (MIC): 3.5mm MIC jack for optional TK-250 headset microphone (part# MC-TK250LTM).
5. Auxiliary (AUX): Input for laptop, MP3 player, or other audio source to transmit wirelessly.
6. Charger Input (CHARGER): Connect charging cable for daily charging. Front LED glows RED when charging.

Optional HM-70 Controls and Connections

Diagram Description: An image shows the HM-70 handheld microphone with numbered controls.

1. ON/OFF/MUTE Switch: Turns unit ON, OFF, or MUTE.
2. Channel Select Switch (CH A/B): Located in the battery compartment, set to Channel B at the factory.
3. Power/Charge Indicator: Light glows RED when ON, GREEN when charging.
4. Charger Input (CHARGER): Plug charging cable into this jack for daily charging.
5. Infrared Emitters: Avoid covering emitters when gripping the HM-70 to prevent interrupting signal transmission.
6. Volume Gain Adjustment: Optimum volume level is pre-set at the factory.

1. Unpacking Your System

Ensure that you have received all of the components of your system. (Components listed in System Components section).

2. Positioning the 705iR

The 705iR has a built-in speaker that should be directed toward the students. Place the unit on a table or bookshelf at a height of 36 to 60 inches.

Ideal Placement: Centered along the longest wall.

Placement Guide:

• BEST: Centered on the longest wall.
• GOOD: Centered on the short wall.
• OKAY: In a corner.
• AVOID: Placing the unit directly in front of a window.

Diagram Description: A diagram illustrates classroom seating arrangements and shows optimal placement of the 705iR unit along the longest wall, good placement on the short wall, and okay placement in a corner.

Initial Set-Up: REDMIKE

1. Turn the 705iR power knob clockwise. The CH A POWER LED will flash RED once.
2. Turn on the REDMIKE. The 705iR's GREEN IR LED above the CH A POWER knob will light, indicating a signal is received.
3. Slip the REDMIKE with lanyard around the neck and position the top of the microphone just below the collarbone. NOTE: Positioning is critical for proper volume adjustment.
4. While speaking in a normal voice, slowly increase the volume of the corresponding channel on the 705iR until your voice is barely audible. REMEMBER: This equipment supplements the user's voice for conversational tone. High volume may cause feedback and listener fatigue.
5. If using a second REDMIKE, repeat steps 2-4. Each REDMIKE is pre-set to Channel A or B.

Initial Set-Up: Optional LT-71

1. Turn the 705iR power knob clockwise. The CH A POWER LED will flash RED once.
2. Turn on the LT-71 and set the channel to B. The 705iR's GREEN IR LED above the CH B knob will light, indicating a signal is received.
3. Slip the LT-71 with lanyard around the neck and position the top of the microphone just below the collarbone. NOTE: Positioning is critical for proper volume adjustment.
4. While speaking in a normal voice, increase the CH B volume level until your voice is barely audible. REMEMBER: This equipment is designed to supplement and distribute the user's voice for conversational tone. High volume may cause feedback and listener fatigue.

Initial Set-Up: Optional HM-70

1. Turn the 705iR power knob clockwise. The CH A POWER LED will flash RED once.
2. Turn on the HM-70 by sliding the switch to the top position. The 705iR's GREEN IR LED above the CH B knob will light, indicating a signal is received. The HM-70 is factory set to Channel B.
3. Grip the barrel in the center section. Avoid covering the infrared emitters to prevent interrupting signal transmission.
4. While speaking in a normal voice, increase the CH B volume level until your voice is barely audible. REMEMBER: This equipment is designed to supplement and distribute the user's voice for conversational tone. High volume may cause feedback and listener fatigue.

Charging the 705iR

1. Ensure the 705iR power knob (CH A POWER) is turned off.
2. Plug the power supply/charger cable into a standard AC outlet.
3. Plug the other end of the power supply/charger into the DC power jack on the back of the 705iR. The LED above the DC jack will glow RED. A solid GREEN LED indicates the 705iR is fully charged.

Helpful Hint: Many users opt to only use the AC power, making battery charging unnecessary. When fully charged, the circuit switches to a trickle charge, which will not overcharge or damage the batteries. A fully charged 705iR can operate under battery power for up to 6 hours.

Charging the REDMIKE

1. Plug the power cord into the cradle charger and then plug the AC end into an electrical outlet.
2. Ensure that the REDMIKE is turned OFF.
3. Place the REDMIKE into the cradle. The LED on the cradle will glow RED indicating charging has started. When the REDMIKE is fully charged, the LED on the cradle charger will change to GREEN.

Helpful Hint: REDMIKE incorporates alkaline protection. Replacement AA NiMH batteries may only be purchased through Lightspeed Technologies (part # BA-NH2A27). A blinking LED indicates a charging error; use a Lightspeed rechargeable sensing battery.

Charging the Optional LT-71

1. Ensure that the LT-71 is turned OFF.
2. Make sure the cradle charger is plugged into a wall outlet. Connect one end of the charging cable into the jack labeled CHARGER on the side of the LT-71 and plug the other end into the charging jack on the rear of the REDMIKE cradle charger. The LT-71's rechargeable batteries are factory installed. The LED on the front of the LT-71 will glow RED when charging.
3. Leave the LT-71 plugged in overnight (8–10 hrs.) to obtain a full charge.

Helpful Hint: Microphones can be left in the charger for up to two weeks without degradation to battery life. A full charge is attained in 8-10 hours. Fully charged Lightspeed microphones will last over 7 hours.

Charging the Optional HM-70

1. Ensure that the HM-70 is turned OFF.
2. Make sure the cradle charger is plugged into a wall outlet. Connect one end of the charging cable into the jack labeled CHARGER on the side of the HM-70 and plug the other end into the charging jack on the rear of the cradle charger. The HM-70's rechargeable batteries are factory installed. The LED on the front of the Handheld Mic will glow GREEN when charging.
3. Leave the HM-70 plugged in overnight (8–10 hrs.) to obtain a full charge. The GREEN light will turn off when fully charged.

Helpful Hint: Do not attempt to charge alkaline batteries. They can overheat and expand, creating a significant hazard and damaging the LT-71 and HM-70. (This is not covered by the warranty.)

Output to Personal FM Transmitter

1. Using a cable with a 3.5 mm connector at one end, connect the AUX OUT of the 705iR to the input jack of the FM transmitter. Different manufacturers use different size audio input jacks on the transmitter. The Lightspeed LES-370 requires the CA-MMC 3535 cable.
2. Connect a patch cable from the AUX OUT jack on the top of the 705iR to the FM transmitter's microphone or AUX input jack.
3. Adjust the volume control on the Personal FM receiver to maximum output. NOTE! This is to set the maximum allowable signal from the 705iR.
4. With the 705iR and FM transmitter turned on, speak into the microphone and slowly adjust the AUX OUT volume control until the appropriate audio level is achieved through the personal FM system.

Helpful Hint: The optional LT-71 can also amplify external audio. Simply plug the 3.5mm patch cable from the audio source into the input labeled “AUX IN” and adjust the volume of the source to the desired sound level.

Troubleshooting Guide

Note: Most problems are directly related to low battery power. Please run through the “Battery Check” items first. For remaining troubleshooting, use known good, fully-charged batteries.

Battery Check

• Confirm batteries are charged each night.
• Confirm proper batteries are used. The REDMIKE requires the Lightspeed BA-NH2A27 rechargeable sensing battery. The LT-71 & HM-70 require NiMH AA rechargeable batteries.
• Make sure the microphones are turned off while charging so a full charge is attained. Full charge will last eight hours.
• Inspect the battery contacts. Clean and adjust if necessary.

Hearing Static

• Ensure that no other REDMIKE/LT71/ HM70 is operating on the same channel.

Low Volume or Feedback

• Ensure the pendant style microphone is positioned appropriately, just below the collar bone.
• Check volume level on the amplifier. If the volume is too high, feedback will occur. Adjust accordingly.

No Sound From Speaker

• Turn the 705iR on. Confirm that the POWER light flashes RED one time when turned on.
• Confirm signal is being received at the 705iR. The IR signal light will be GREEN indicating a signal is being received from the microphone.
• Confirm that REDMIKE is turned on. There will be a BLUE LED on the microphone to indicate it is powered on.

If you review these instructions and still have questions, write down the serial number and model number of your system and call Lightspeed Technical Services at 800.732.8999, 5 a.m. – 5 p.m., PST.

Daily Use Instructions

1. TURN ON THE 705iR: Ensure the power is switched on. The RED LED will momentarily flash when turned on.
2. POSITION THE REDMIKE: Remove the REDMIKE from the charging cradle and place it around your neck. Adjust the neck strap so the top of the microphone rests just below your collarbone.
3. TURN ON THE REDMIKE: Turn the microphone ON using the ON/ OFF switch on the side of the REDMIKE and speak normally.
4. CHARGE BATTERIES: Place the REDMIKE back into the charging cradle to recharge at the end of the day.

Tips on Classroom Audio

1. Speak in a natural voice. A normal conversational speech level will provide an adequate signal. It is not necessary to increase the intensity of your voice—the audio system provides adequate amplification (approximately 5 – 10 dB) above ambient room noises.
2. Avoid wearing jewelry that may rub or bump against the microphone.
3. Turn the REDMIKE off during private conversations with a student, parent, or other classroom visitor. You can also cover the LED lens on top of the REDMIKE to block the signal.
4. Recharge batteries each night. When recharged nightly, operating time (actual usage) for the transmitters will last through a typical school day.

Five-year Limited Warranty

Lightspeed Classroom Audio Systems are guaranteed against malfunction due to defects in materials and workmanship for a period of FIVE (5) YEARS, beginning at the date of the purchase invoice. If such malfunction occurs, the product will be repaired or replaced (at Lightspeed's option) without charge during the warranty period.

1. Warranty on infrared microphones is FIVE (5) YEARS.
2. Warranty on Lightspeed rechargeable batteries, all external cables and wires provided by Lightspeed is one (1) year.
3. Prepaid shipping labels are provided by Lightspeed factory or an authorized warranty service center for warranty repairs.
4. Warranty does not extend to finish, appearance items, or malfunctions due to abuse or operation other than specified conditions, nor does it extend to incidental or consequential damages. Repair by other than Lightspeed or its authorized service agencies will void this guarantee. Information on authorized service agencies is available from Lightspeed Technologies, Inc.

Our Service Department (800.732.8999, 5 a.m. – 5 p.m., PST) will handle all your repair/replacement needs.