SU20 - Microphone Chord - Free user manual and instructions

Product Type	Dynamic Microphone
Brand	Chord
Model	SU20
Polar Pattern	Cardioid
Frequency Response	50 Hz - 15 kHz
Impedance	600 Ω
Sensitivity	-54 dB ± 3 dB
Connector	XLR (3-pin)
Cable Length	5 m (16.4 ft)
Dimensions (L x Dia)	180 mm x 50 mm (7.1 in x 2.0 in)
Weight	250 g (8.8 oz)
Power Supply	Passive (no battery required)
Material	Zinc alloy die-cast body
On/Off Switch	Yes, slide switch
Color	Black
Included Accessories	Microphone clip, cable, carrying pouch
Maintenance	Wipe with a dry cloth; do not use solvents
Safety	Avoid moisture and extreme temperatures
Spare Parts	Replacement cable (model MC-05)
Repairability	Contact authorized service center

Frequently Asked Questions - SU20 Chord

How do I connect the Chord SU20 microphone to my computer?

To connect the SU20 to a computer, you need an audio interface or a USB adapter with an XLR input. Plug the XLR cable into the microphone and the interface, then connect the interface to your computer via USB.

Does the SU20 require phantom power?

No, the Chord SU20 is a dynamic microphone and does not require phantom power. It works passively with an XLR connection.

What is the optimal distance for speaking into the microphone?

For best sound quality, speak or sing 2-6 inches (5-15 cm) away from the grille. Closer proximity enhances bass response (proximity effect).

How do I clean the Chord SU20?

Use a soft dry cloth to wipe the exterior. For the grille, gently remove it and rinse with warm water if needed, then let it dry completely before reattaching.

Why is there no sound coming from the microphone?

Check that the XLR cable is fully plugged into both the microphone and the audio interface or mixer. Ensure the mute switch is off and the volume is turned up. Try a different cable or input channel.

Can I use the SU20 for recording vocals?

Yes, the SU20 is suitable for vocals, speech, and live performances. Its cardioid pattern reduces background noise.

What is the frequency response of the SU20?

The frequency response is 50 Hz to 15 kHz, providing a clear and natural sound for most applications.

Is the microphone compatible with wireless systems?

Yes, the SU20 can be used with wireless bodypack transmitters that have an XLR input. Remove the cable and connect a suitable transmitter.

How do I reduce feedback during live use?

Position the microphone behind the speakers and point it away from monitors. Use EQ to cut frequencies around 1 kHz if feedback occurs.

Where can I find the user manual for the SU20?

The user manual is available for free download on notice-facile.com in PDF format. Search for 'Chord SU20' to access it.

USER MANUAL SU20 Chord

Dual UHF Wireless System

Item ref: 171.907UK, 171.908UK, 171.909UK, 171.917UK, 171.918UK

User Manual

Collection of wireless earphones and audio devices including a SUI20 network and various headsets (no visible text or labels)

Version 1.2

Caution: Please read this manual carefully before operating

Damage caused by misuse is not covered by the warranty

Introduction

Thank you for choosing the Chord SU20 wireless system. This professional wireless set provides a dual high quality UHF radio microphone system for freedom of movement without loss of audio quality. The SU20 uses Chord's NU4 technology to enable 2 sets to operate together on separate frequencies (ensure 2 sets with different carrier frequencies). Please read this manual before using this equipment in order to avoid damage through incorrect operation and to get the best performance from your purchase.

Package Contents

• SU20 UHF wireless receiver
- 19" rack mounting brackets
- 2 x UHF aerial
• 2 x BNC antenna cable (for front panel mounting)
- 2 x transmitter (SU20-H handheld and/or SU20-B bodypack)
- 2 x neckband and 2 x lavalier microphones (SU20-B only)
- 1 x neckband and 1 x lavalier microphone (SU20-C only)
- Mains power adapter
- 6.3mm mono jack lead
- 4 x 1.5V AA battery

If you find any accessory is missing or the product has arrived with any problems, contact your retailer. These products contain no user-serviceable parts inside. Do not attempt to try to fix or modify these items yourself as this will invalidate the warranty. We recommend you keep the original package and proof of purchase for any possible replacement or returned demand.

Warning

To prevent the risk of fire or electric shock, do not expose any of the components to rain or moisture. If liquids are spilled on any component, stop using immediately, allow unit to dry out and have checked by qualified personnel before further use.

Avoid impact or heavy vibration to any of the components, dropping the microphone can cause capsule failure. No user serviceable parts inside transmitter or receiver - refer servicing to qualified service personnel.

Safety

• Ensure that the correct power adaptor is used with adequate current rating (350mA minimum) and that the mains voltage is as stated on the adapter.
• Avoid ingress of water or particles into the transmitters or receiver
  • Use alkaline or NiMH batteries in the transmitters and remove if unused for long periods.
• Observe the correct polarity when replacing batteries

Placement

• Keep all components out of direct sunlight and away from heat sources.
• Do not place heavy objects on top of the receiver or transmitters
• If rack-mounting, use rack ears provided and do not place heavy equipment above the receiver.
• 2 receivers may be mounted side by side in a single 19" rack space using the supplied jointing plate.
• Keep the transmitters and receiver away from damp or dusty environments.

Cleaning

• Use a soft cloth with a neutral detergent to clean the body of the handheld transmitter and receiver.
  • Lightly damp sterile wipes may be used on the microphone grille for hygiene purposes
• To avoid damage, do not use solvents to clean the components

Receiver Front Panel

1. Power on/off switch
2. RF carrier signal indicator - Channel A
3. AF audio signal indicator - Channel A
4. VOLUME control – Channel A
5. RF carrier signal indicator - Channel B
6. AF audio signal indicator - Channel B
7. VOLUME control – Channel B

Receiver Rear Panel

1. DC power input jack
2. BNC antenna connector - Channel B
3. Unbalanced 6.3mm jack output CH. A+B
4. Balanced XLRM output - Channel B
5. Balanced XLRM output - Channel A
6. BNC antenna connector - Channel A

Transmitters

1. Antenna
2. LED indicator
3. On/off switch
4. 3.5mm jack socket (beltpack only)
5. Gain control (beltpack only)
6. Battery compartment

Note: If replacement transmitters are required, these must be genuine Chord branded transmitters which transmit the correct pilot tone to match with the receiver. Transmitters which have the same carrier frequency but not the correct pilot tone will not work with SU-series receivers.

The SU20 system can allow 2 sets to be used together with Red, Green, Blue and Yellow channels working independently without interference with each other.

Setting Up

Insert the supplied AA batteries into the handheld transmitter by carefully unscrewing the base to reveal the battery compartment inside the microphone body, connect the batteries (ensure + and - are the correct way around for each cell) and carefully screw the base back on.

For bodypack transmitters, gently pull downward at the inset on the front of the beltpack and flip forward the front cover to reveal the battery compartment. Insert 2 x AA batteries (ensure + and - are the correct way around for each cell). Connect the 3.5mm jack connector from the neckband or lavalier microphone to the input on top of the bodypack transmitter and rotate to secure the thread.

Position the receiver within the best available line of sight to the transmitter and connect the DC jack of the supplied power adapter to the receiver and the plug-top to the mains outlet.

Connect the 2 UHF antennas to the BNC connector on the rear panel or alternatively, attach each to the supplied rack mounting brackets, connecting via the BNC extension lead supplied.

Turn mic levels for CH. A and CH. B down on the receiver.

A choice of unbalanced 6.3mm jack or balanced XLR output is available on the rear panel of the receiver. Connect the supplied 6.3mm jack lead for a mix of both channels or optionally, connect an XLR lead to each balanced XLR output for 2 independent outputs.

Turn down the volume of any equipment (mixer, amplifier etc.) that the signal will be fed into and then connect the jack lead or XLR leads to the equipment.

Warning! - take care not to point the microphones towards speakers – this can cause damaging feedback (loud whistle or howling noise) – try to aim the microphone away from the speakers.

Operation

Switch on power to the receiver unit.

Move the switch on each handheld transmitter to the fully up position (ON) and gradually increase the microphone level on the receiver (for bodypack transmitters, move the top slide switch to "ON"), then increase the volume on the mixer or amplifier until the sound from each microphone can be heard through the equipment.

Note: if output is low from the neckband or lavalier microphone, it may be necessary to adjust Gain control inside the bodypack unit

After use, slide the transmitter switch to the "OFF" position, which mutes and deactivates the radio signal and powers down the transmitter. Turn down the volume of the mixer or amp and then switch off the receiver.

Please note that the transmitter slide switch has a "MUTE" centre position, which is not used with the SU-series system. Switching the transmitter off automatically mutes the reception channel.

Unplug signal leads from the receiver and mixer or amplifier when moving or packing away.

If the system is not to be used for long periods of time, remove the batteries from the transmitters and unplug the power adapter from the receiver and the mains outlet.

Folding away or removing the antenna can also help avoid damage when the system is not in use.

Specifications

Model	SU20-H-RG	SU20-H-BY	SU20-C-RG	SU20-B-RG	SU20-B-BY
Dimensions: handheld	250 x 47mm∅	250 x 47mm∅	250 x 47mm∅	N/A	N/A
Weight: handheld	231g (no battery)	231g (no battery)	231g (no battery)	N/A	N/A
Dimensions: beltpack	N/A	N/A	110 x 676 x 24mm	110 x 676 x 24mm	110 x 676 x 24mm
Weight: beltpack	N/A	N/A	74g (no battery)	74g (no battery)	74g (no battery)
Power supply	14Vdc 500mA (adaptor supplied)
Antenna connection	BNC
Batteries	4 x AA (2 per transmitter) included
Carrier frequencies	863.42MHz (Red), 864.3MHz (Green), 864.8MHz (Blue), 863.1MHz (Yellow)
RF power	10mW
Range	60m
Mic. polar pattern	Cardioid (handheld, neckband or lavalier)
Output connections	2 x balanced XLR, 1 x unbalanced 6.3mm jack
Output impedance	2.2k Ohms
Output level	400mV (balanced), 200mV (unbalanced)
Frequency response	50Hz - 18kHz (±3dB)
S/N ratio	>80dB
THD	<0.5% @ 1kHz
Dimensions: receiver	203 x 187 x 42mm
Weight: receiver	845g

Troubleshooting

"POWER" LED does not light on receiver	Ensure power adapter is connected to mains and working properly
	Ensure receiver is switched on (press front power button until it lights)
"POWER" LED is lit but no "RF" or "AF" LEDs	Ensure each transmitter is switched on
	Check that each transmitter is not out of reception range
	Check that all transmitter batteries are good/charged
"POWER" and "RF" LEDs are lit but no "AF" and no sound	Check that each transmitter switch is switched on
	Ensure each transmitter has good/charged batteries
	Ensure there is no other nearby transmitter with the same frequency
All LEDs lit but no sound from mic	Make sure receiver is properly connected to mixer/amplifier
	Ensure that receiver and amplifier/mixer channel volumes are turned up
Microphone output is very loud or distorted	Turn down the relevant channel VOLUME on receiver
	Turn down gain on bodypack transmitters
	Reduce gain on mixer/amplifier
	Ensure that an XLR output is not fed to a "Hi-Z" line input
Microphone output is very low	Turn up VOLUME on receiver
	Turn up gain on bodypack transmitter
	Increase gain of mixer/amplifier input
	Ensure that the jack output is not fed to an XLR input with "Lo-Z" level
	Check transmitter batteries

"Disposal: The "Crossed Wheelie Bin" symbol on the product means that the product is classed as Electrical or Electronic equipment and should not be disposed with other household or commercial waste at the end of its useful life. The goods must be disposed of according to your local council guidelines

Hereby, AVSL Group Ltd. declares that the radio equipment type 171.907UK, 171.908UK, 171.909UK, 171.917UK and 171.918UK are in compliance with

Directive 2014/53/EU

The full text of the EU declaration of conformity for 171.907UK is available at the following internet address: http://www.avsl.com/assets/exportdoc/1/7/171907UK%20CE.pdf
The full text of the EU declaration of conformity for 171.908UK is available at the following internet address: http://www.avsl.com/assets/exportdoc/1/7/171908UK%20CE.pdf
The full text of the EU declaration of conformity for 171.909UK is available at the following internet address: http://www.avsl.com/assets/exportdoc/1/7/171909UK%20CE.pdf
The full text of the EU declaration of conformity for 171.917UK is available at the following internet address: http://www.avsl.com/assets/exportdoc/1/7/171917UK%20CE.pdf
The full text of the EU declaration of conformity for 171.918UK is available at the following internet address: http://www.avsl.com/assets/exportdoc/1/7/171918UK%20CE.pdf

Errors and omissions excepted. Copyright© 2021.

AVSL Group Ltd. Unit 2-4 Bridgewater Park, Taylor Rd. Manchester, M41 7JQ

AVSL (EUROPE) Ltd, Unit 3D North Point House, North Point Business Park, New Mallow Road, Cork, Ireland.

SU20 User Manual