Chord CB-25 User manual

CB-25
Bass Amplifier
Item ref: 173.442UK
User Manual
Version 1.1
Caution: Please read this manual carefully before operating
Damage caused by misuse is not covered by the warranty

173.442UK User Manual
Introduction
Thank you for choosing our CB series bass amplifier. Please read this manual prior to use to avoid damage to the item.
The CB range is specifically designed to give the bass player a powerful, dependable amplifier with enough useful
features to suit a wide variety of situations from rehearsal to stage.
Warning
To prevent the risk of fire or electric shock, do not expose this appliance to rain or moisture. To prevent electric shock do
not remove the cover. No user serviceable parts inside. Refer servicing to qualified service personnel.
Safety
•Prior to connecting mains, ensure that the supply voltage is correct, and the mains lead is in good condition.
•Avoid ingress of water or particles into the enclosure.
•If the mains fuse blows, refer the unit to qualified service personnel.
•Keep the unit out of direct sunlight and away from heat sources.
•Place the unit in an upright position during use and storage.
•Keep the unit away from moisture or dusty environments.
Cleaning
Use a soft cloth with a neutral detergent to clean the cabinet, panel and controls. To avoid damage, do not use solvents.
Controls and Connectors
1. IEC power inlet & fuse holder
2. Input –6.3mm jack (unbalanced)
3. Gain control –Turning clockwise boosts input and increases drive
4. Low EQ control
5. Low-Mid EQ control
6. High-Mid EQ control
7. High EQ control
8. Master output level
9. Phones –6.3mm jack output to drive headphones
10. MP3 in –3.5mm jack socket to plug in a line input to play along with.
11. Power –Illuminated mains switch

173.442UK User Manual
Operation
Connect the bass guitar to the CB-series bass amplifier input using a good quality 6.3mm mono jack lead.
Connect the amplifier to the mains using the appropriate mains IEC lead supplied.
Set all EQ controls to the mid-way position.
With the Master volume turned down, switch on the power switch and gradually increase the Master volume to the
required level.
Increase Gain and play a note, ensuring that the bass guitar’s volume and tone controls are turned up. Continue
increasing Gain until the required signal level and drive amount are achieved.
Adjust the 4 EQ controls to boost or cut the relevant frequency ranges that produce the tonal response required.
Low and Low-Mid cover the bass frequencies, whereas High-Mid and High cover the treble frequencies.
Some experimentation is needed to achieve the best results from the EQ and will depend on how much low frequency
punch and higher frequency detail is needed.
Plugging in a pair of headphones to the 6.3mm Phones jack will allow silent practice by muting the speaker output.
Plugging a personal stereo playback device (like an mp3 player) into the MP3 mini-jack input allows the music to be
mixed in with the bass guitar sound for “play-along” practice.
Before switching off or removing power, turn down the Master volume control.

173.442UK User Manual
Specifications
Troubleshooting
No output and no Power light
Check POWER switch is on and mains lead is connected properly
Check mains fuse hasn’t blown
Power LED lit but no Output
Check that Gain, EQ, Master and bass guitar controls are not turned down fully
Check Speaker Outs are connected to the relevant speakers
Check that headphones are not left plugged in
Change jack lead to check if faulty, also for Send and Return jacks
Check battery is OK in active bass or effects units in the Send/Return loop
Output too distorted
Make sure Active bass is not plugged into Passive input
Reduce Gain & EQ controls and increase Master volume to compensate
Adjust compression effect to combat heavy string attack
Output very quiet
Check that Gain, EQ, Master and bass guitar controls are not turned down
Make sure passive bass is not plugged into Active input
Unplug effects from Send/Return loop to check if they are cutting signal level
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.
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
Power supply
220-250Vac, 50/60Hz (IEC)
Output power @ 8Ω
25Wrms
Speaker unit(s)
8" HD driver
Input
6.3mm jack + 3.5mm Aux jack
Phones Out
6.3mm jack
Preamp Controls
Gain, Master
Equalisation
4-band EQ
Dimensions
365 X 395 X 300mm
Weight
12kg