DS428D

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DIGISYNTHETIC DS428D Instruction Manual | Manualzz

DS428D

Instruction manual

CAUTION

RISK OF ELECTRIC SHOCK

DO NOT OPEN

CAUTION: TO REDUCE THE RISK OF ELECTRIC

SHOCK DO NOT REMOVE COVER ( OR BACK)

NO USER-SERVICEABLE PARTS INSIDE

REFER SERVICING TO QUALIFIED PERSONNEL

The lightning flash with arrowhead synbol within an equilateral triangle is intended to alert the user to the presence of uninsulated dangerous voltage within the product's enclosure, that may be of sufficient magnitude to constitute a risk of electric shock to persons.

The exclamation point within an equilateral triangle is intended to alert the user to the presence of important operation and maintenace (servicing) instruction in the literature accompanying the appliance.

IMPORTANT SAFETY INSTRUCTION

Please see below basic protection proceeding before using

1. Please read all the safety instruction before using the product.

2. This product must be earthed. If it should be malfunction or break down, grounding provides a path of least resistance for electric current to reduce risk of electric shock.

This product is equipped with a cord having an equipment-grounding conductor and a grounding plug. The plug must be plugged into an appropriate outlet that is properly installed and earthed in accordance with all local codes and ordinance.

DANGER-

Improper connection of the equipment-grounding conductor can result in a risk of electric shock. Check with

a qualified electrician or serviceman if you are in doubt as to whether the product is properly grounded. Do not modify the plug provided with the product - if it will not fit the outlet, have a proper outlet installed by a qualified electrician.

3. To reduce the risk of injury, close supervision is necessary when the product is used near children.

4. Do not use this product near water-for example, near a bathtub, washbowl, kitchen sink, in wet basement or near a swimming pool or the lake.

5. This product may be capable of producing sound levels that cloud cause permanent hearing loss. Do not operate for a long period of time at high volume level or at a level that is uncomfortable. If you experience any hearing loss or ringing

in the ears, you should consult an audiologist.

6. This product should be located so that its location or position does not interfere with its proper ventilation.

7. This product should be located away from heat sources such as radiators, heat registers or other products that produce heat.

8. The product should be connected to a power supply only of the type described on the operation instructions or as marked on the product.

9. This product may be equipped with a polarized line plug (one blade wider than the other). This is a safety feature. If you are unable to insert the plug into the outlet, contact an electrician to replace your obsolete outlet. Do not defeat the safety purpose of the plug.

10.The power-supply cord of the product should be unplugged from the outlet when left unused for a long period of time.

When unplugging the power-supply cord, do not pull on the cord, but grasp it by the plug.

11.Care should be taken so that object do not fall and liquid are not spilled into the enclosure through opening.

12.The product should be serviced by qualified service personnel when:

A. The power-supply cord or the plug has been damaged; or

B. Objects have been fallen, or liquid has been spilled into the product; or

C. The product has been exposed to rain; or

D. The product does not appear to operate normally or exhibits a marked change in performance; or

E. The product has been dropped or the enclosure damaged..

13.Do not attempt to service the product beyond that described in the user-maintenance instructions. All other servicing should be referred to qualified service personnel.

14

WARNING

-

Do not place objects on the product's power cord or place it in a position where anyone could trip over, walk on or roll anything over it. Do not allow the product to rest on or to be installed over power cords of any type. Improper installations of this type create the possibility of fire hazard and/or personal injury.

SAVE THESE INSTRUCTIONS

Features

DS428D

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24-bit Dual DSP technology high funtional AKM AD AK5392.

4 Inputs / 8 Outputs multi-kinds of crossover mode for flexible configuration.

Crossover slope of12dB,18dB,24dB or 48dB per octave filter type Butterworth, Linkwitz-Riley

or Bessel

6 bands EQ every input, 4 bands EQ every output, Parametric, L-Shelf H-Shelf.

Parametric EQ: Full bandwidth, 1/64 to 4.0 octave range.

Every input delay time up to 682.52ms

every output delay time up to 2000.02ms.

Polarity reverse control on each output.

Every output channel all have limiter, threshold, ratio, attack time and release time for flexible

configuration.

Friendly user interface USB.

2X20 LCD backlit.

12X7 band input and output level meter.

Switch power supply 90~250V

Front panel

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1 . Seven bands input meter.

2 . Seven bands output meter

3 . 2X20 character LCD to indicate all kinds of parameter.

4 . PARAMETER with PUSH

PUSH Key to switch the main menu.

Rotate PARAMETER to adjust parameter value, password character and program name and so on.

5 . PREV: switch sub-menu, change password letter position and so on.

6 . NEXT: switch sub-menu,change password letter position and so on.

7 . RECALL: recall program and quit the menu.

8 . Input MUTE: the left meter will lighten when input mute

9 . Output MUTE: the left meter will lighten when output mute.

10 . Key: switch the option and change parameter value.

11 . Key: switch the option and change parameter value

12 . SAVE/ENTER: save program and confirm key

Rear panel

CAUTION! FOR CONTINUED

PROTECTION AGAINST FIRE

REPLACE ONLY WITH SAME

TYPE T1A,250V FUSE.

USB RS485 IN RS485 OUT

8 7 6 5

OUTPUTS

4 3 2 1 D C

INPUTS

B A

4

5

1 2

3

1 Power Jack

2 USB interface PC control interface

3 RS485 interface

4 Eight channel XLR output terminal

5 Four channel XLR input terminal

Operation

1.Input channel parameter setting

IN:A

Gain = 0.0dB

IN:A DELAY 145.87ms

50.24m 164.83ft

IN:A EQ ON F:1-PEQ

0.0dB 1000Hz 1.00

INPUT GAIN

Gain range is-40dB~12dB step is 0.1dB

Use PARA METER or key to change parameter value.

When use PARAMETER to change parameter value, step is 0.1dB.

when use or key to change parameter value, step is 5.0dB

On the front panel there is input MUTE key to mute quickly.

Press NEXT key to enter input delay sub-menu.

Press PREV key to enter copy input data sub-menu.

Press PARAMETER key to switch channel.

INPUT DELAY

Every input delay time up to 682.52ms

step is 21us.

Delay use three units of ms, m, ft to show.

Use PARA METER or key to change parameter value.

When use PARAMETER to change parameter value, step is 21us.

when use or key to change parameter value, step is 5.20ms.

Press NEXT key to enter input EQ sub-menu.

Press PREV key to enter input gain sub-menu.

Press PARAMETER key to switch channel.

INPUT EQ

Each input channel has six selectable EQ filters.

It may set EQ switch of each input channel.

EQ type has PEQ, LS1(Low-Shelf 6dB),LS2(Low-Shelf 12dB),

HS1(High-Shelf 6dB),HS2(High-Shelf 12dB).

EQ gain range is -30dB~15dB step is 0.1dB.

PEQ frequency range is 19.7Hz~20kHz Low-Shelf frequency range is 19.7Hz~2kHz High-Shelf frequency range is

3886Hz~21.9kHz. PEQ bandwidth range is 0.016Oct~4.000Oct

Use PARAMETER to adjust current option parameter.

Press NEXT key to enter link setup sub-menu.

Press PREV key to enter input delay sub-menu.

Press or key to switch on-off type filter gain frequency and bandwidth option. Arrow key indicate current option

Press PARAMETER key to switch channel.

Operation

IN:A LINK SETTING

INB: OFF

Press [PREV][NEXT][encoder ]

Are You Sure

OK CANCEL

Copy Input A

to Input: B

INPUT LINK CONFIGURE

Switch the channel by the 3 and 4 keys.

Rotate PARAMETER to switch the link.

Press the [NEXT] key to enter the input copy data sub menu

Press the [PREV] key to enter the input EQ submenu

Press the encoder to switch the channel .

After the link configure was changed , when exit the link menu you will be required to confirm .

( press the3 and 4 keys to select OK or Cancel

Press the [SAVE/ENTER] key to confirm the modification )

Press the [SAVE/ENTER] directly to confirm the modification for the link configure.

COPY INPUT DATA

Rotate the PARAMETER switch the destination channel .

Press[SAVE/ENTER] key to copy the channel data.

By press the [Next ]key,you can enter the input Gain - submenu.

By press the [PREV] key , you can enter the link configure submenu.

Press PARAMETER key to switch channel.

2.Output channel parameter setting

Op1 Gain 0.0dB

Phase:[+] Source:A

Op1 DELAY 16.10ms

5.54m 18.19ft

OUTPUT GAIN

Output gain range is -40dB~12dB, step is 0.1dB.

Use +,- to indicate Phase.

Input Source may set for A,B,C,D,A+B,C+D,ALL,OFF.

Front panel has output MUTE to mute rapidly.

Press NEXT key to enter output delay sub-menu.

Press PREV key to enter copy output data sub-menu.

Press and key to switch gain, phase and input source and

so on option. Arrow key indicator current option.

Press PARAMETER key to switch channel.

OUTPUT DELAY

Every output channel delay up to 2000.02ms, step is 21us.

Delay use three units of ms, m, ft to show.

Use PARAMETER, and key to change delay value.

When use PARAMETER to adjust delay value , step is 21us.

When use and key to adjust delay value, step is 10ms.

Press NEXT key to enter output EQ sub-menu.

Press PREV key to enter output gain sub-menu.

Press PARAMETER key to switch channel.

Operation

Op1 EQ ON F:1-PEQ

0.0dB 1000Hz 1.00

OUTPUT EQ

Each output channel has four selectable EQ filters.

It may set EQ switch of each output channel.

EQ type has PEQ, LS1(Low-Shelf 6dB),LS2(Low-Shelf 12dB),

HS1(High-Shelf 6dB) and HS2(High-Shelf 12dB).

EQ gain range is -30dB~15dB,step is 0.1dB.

PEQ frequency range is 19.7Hz~20kHz Low-Shelf frequency

range is 19.7Hz~2kHz High-Shelf frequency is 3886Hz~21.9kHz.

PEQ bandwidth range is 0.016Oct~4.000Oct

Press NEXT key to enter output high-pass sub-menu.

Press PREV key to enter output delay sub-menu.

Press 3 and 4 key to switch gain, phase and input source and so on option. Arrow indicate current option.

Press PARAMETER key to switch channel.

Op1 HighPassFilter

19.7Hz 24dB Linkwiz

Op1 LowPassFilter

16k0Hz 24dB Linkwiz

OUTPUT HIGH-PASS FILTER

Filter frequency range is 19.7Hz~21.9kHz.

Filter type has 12dB Butterworth,12dB Bessel,12dB

Linkwitz,18dB Butterworth,18dB Bessel,24dB Butterworth,24dB Bessel,24dB Linkwitz,48dB Butterworth,

48dB Bessel,48dB Linkwitz.

Use PARAMETER to adjust current option parameter value.

Press NEXT key to enter output low pass sub-menu.

Press PREV key to enter output EQ sub-menu.

Press and key to switch frequency and slope and so on option.

Arrow indicate current option.

Press PARAMETER key to switch channel.

OUTPUT LOW PASS FILTER

Filter frequency range is 19.7Hz~21.9kHz,OFF.

Filter type is 12dB Butterworth,12dB Bessel,12dB

Linkwitz,18dB Butterworth,18dB Bessel,24dB Butterworth,24dB Bessel,24dB Linkwitz,48dB Butterworth,

48dB Bessel,48dB Linkwitz.

Use PARAMETER to adjust current option parameter value.

Press NEXT key to enter output limiter sub-menu.

Press PREV key to enter output high pass sub-menu.

Press and key to switch frequency and slope and so on option.

Arrow indicate current option.

Press PARAMETER key to switch channel.

Operation

Op1 LIMITER 0dBu

Inf A.5ms R100ms

OUTPUT LIMITER

Limiter threshold value range is -20dBu~10dBu step is 1dBu.

Limiter ratio parameter has 1.2:1,1.5:1,2:1,3:1,4:1,6:1,10:1,

20:1,Infinite.

Limiter attack time parameter has 0.5ms/dB,1ms/dB,2ms/dB,

5ms/dB,10ms/dB,20ms/dB,50ms/dB.

Limiter release time parameter has 10ms/dB,20ms/dB,50ms/dB,

100ms/dB,200ms/dB,500ms/dB,1sec/dB.

Use PARAMETER to adjust current option parameter value.

Press NEXT key to enter output link configure sub-menu.

OUT:A LINK SETTING

OUTB: OFF

Press

[PREV][NEXT][ encoder ]

ARE YOU SURE

OK CANCEL

OUTPUT LINK CONFIGURE

Switch the channel by the 3 and 4 keys.

Rotate PARAMETER to switch the link.

Press the [NEXT] key to enter the input copy data sub menu

Press the [PREV] key to enter the input EQ submenu

Press the encoder to switch the channel .

After the link configure was changed , when exit the link menu you will be required to confirm .

( press the3 and 4 keys to select OK or Cancel

Press the [SAVE/ENTER] key to confirm the modification )

Press the [SAVE/ENTER] directly to confirm the modification for the link configure.

Copy Output 1

to Output:2

COPY INPUT DATA

Rotate the PARAMETER switch the destination channel .

Press[SAVE/ENTER] key to copy the channel data.

By press the [Next ]key,you can enter the input Gain - submenu.

By press the [PREV] key , you can enter the link configure submenu.

Press PARAMETER key to switch channel.

Operation

3. Main menu switch operation

Press PREV

MAIN MENU:*....

PROGRAM

MAIN MENU:.*...

SECURITY

Press NEXT

Press SAVE/ENTER

Press RECALL

Press PREV

Press NEXT

MAIN MENU:..*..

CONFIG

Press PREV

Press NEXT

MAIN MENU:...*.

DUMP PROGRAM

Press PREV

Press NEXT

MAIN MENU:....*

RECEIVE DUMP

PROGRAM

Load preset

Press PREV

Press NEXT

PROGRAM

Load a program

Press PREV

Press NEXT

PROGRAM

Store a program

4. Program management

Program management includes below sub-menu:

Load Preset mode Load a program Store a program

4.1 Load preset mode

Ten preset crossover mode, input source of preset mode and crossover setting refer to appendix preset mode input source and crossover parameter sheet.

Program

Load Preset

Press SAVE/ENTER key to operate load preset

LOAD PRESET

1:4X2-WAYCrossover

Use PARAMETER to change preset serial number, press SAVE/ENTER key to load preset program.

LOADING PRESET

1:4X2-WAYCrossover

Operation

4.2 Loading Program

Program

Load a program

Press SAVE/ENTER key to enter the operation of load a program

LOAD PROGRAM: 1

4X2-WAYCrossover

Rotate PARAMETER to change program name, press SAVE/ENTER key to load program

LOADING PROGRAM

4X2-WAYCrossover

4.3 Storing program

It may store all parameters of input gain, input delay , input EQ, output gain, output

delay, output EQ, output limit and output phase into the program, convenient for the

unit to debug.

The maximum characters of program name is 20.

It can store 30 programs at most.

Program

Store a program

Press SAVE/ENTER key to enter this sub-menu of store a program.

STORE PROGRAM:1

4*2WAYCROSSOVER

When the colon flash, rotate PARAMETER to choose program name press PREV and NEXT key to change the position of characters, rotate PARAMETER to choose the letter.

Press SAVE/ENTER key to operate storing program.

STORING PROGRAM

4*2WAYCROSSOVER

Operation

5. Security Menu

MAIN MENU:.*....

SECURITY

Press SAVE/ENTER key to enter security sub-menu.

Lock Type

1:Modify

Use PARAMETER to set type type, press SAVE/ENTER key to set.

Set Password

[_ ]

5.1 locking

Four lock types:

1:Modify The parameters can be viewed without any

change. Mute is active.

2:Modify&View The parameters cannot be viewed or

changed. Mute is active.

3:Modify&Mute The parameters can be viewed. Changes

and Mute are inactive.

4:Everything Everything is locked.

Use PARAMETER to choose lock type.

Press SAVE/ENTER button to access the password

set page.

Password eight characters. Characters flash point

Use PARAMETER to change

to the position. Use [PREV] and [NEXT] button to change character, press PREV or NEXT

the character position and use PARAMETER to change

key to change letter position, press

the letter .Press SAVE/ENTER button to finish the operation

of lock, show as LOCKING SYSTEM .

LOCKING SYSTEM

5.2 Unlocking

To enter Security menu after adding the lock. It will indicate to enter password.

Password eight characters. Characters flash point to the position. Use [PREV] and [NEXT]

button to change the character position and use PARAMETER to change the letter .Press

SAVE/ENTER button to finish the operation of entering password. If the password is correct,

It show as UNLOCKING SYSTEM .

If the password is wrong, it shows as PASSWORD ERROR , indicating error password.

MAIN MENU:.*....

SECURITY

Enter Password

[_ ]

Press SAVE/ENTER to enter security sub-menu.

Characters flash point to the positon, Press PREV and NEXT key to change the position of characters, use PARAMETER to choose the letter, Press SAVE/ENTER

to finish the operation of entering password.

Password correct

UNLOCKING SYSTEM

Password error

PASSWORD ERROR

Operation

6. Configure menu

MAIN MENU:..*...

CONFIG

Input the setup state

Config

Device ID: 1 *

Setup the ID NO

Rotate the encoder ,setup the ID NO ,press the

[SAVE/ENTER] to confirm

7. Program copy

Copy program in all units. Master unit send dump, slave units receive dump sent by master one. Before master unit send dump, you must connect RS485 OUT interface of master unit and RS485

IN interface of slave unti by network wire. At the same time to set the state of receiving dump for slave units.Master unit will return to main menu automatically after sending all dump programs. Slave units will return to main menu automatically after receiving all dump programs(Note: the untis can copy program only in the same ID number ).

MAIN MENU:..*...

DUMP PROGRAM

Master Unit: press SAVE/ENTER key to enter the state of sending dump.

Are you sure?

YES

Rotate PARAMETER to set whether are you sure to send. If to set YES, press SAVE/ENTER key to send dump.

Dumping all program

Current 1 ...... OK

......

Master unit dump all program and show program number and sending process.

If successful, show OK . If fault, show ERR .

MAIN MENU:...*..

RECEIVE DUMP

Slave unit: press SAVE/ENTER to enter the state of receiving dump.

Receiving dump

Program

Slave unit wait to receive dump from master unit, press RECALL to exit the state of receiving dump.

Receiving dump

Program 1 OK

......

Slave unit receive dump from master unit and sho program member and receiving

process. If successful, show OK ,if fault,

show ERR .Press RECALL key to exit the state of receiving dump.

IN:A

Gain = 0.0dB

Master unit sending dump process

Master unit return to main menu automatically after the finishing of sending dump.

IN:A

Gain = 0.0dB

Slave unit receiving dump process

Slave unit return to main menu automatically after the finishing of receiving dump.

Operation

APPENDIX: Preset mode input source and crossover parameter sheet

Preset name Output Input source High-pass frequency Low-pass frequency

1:4x2-WAYCrossover OUT1 A 19.7Hz 1000Hz

OUT2 A 1000Hz OFF

OUT3 B 19.7Hz 1000Hz

OUT4 B 1000Hz OFF

OUT5 C 19.7Hz 1000Hz

OUT6 C 1000Hz OFF

OUT7 D 19.7Hz 1000Hz

OUT8 D 1000Hz OFF

2:2x3-WAY+2 Aux OUT1 A 19.7Hz 121.4Hz

OUT2 A 121.4Hz 2000Hz

OUT3 A 2000Hz OFF

OUT4 B 19.7Hz 121.4Hz

OUT5 B 121.4Hz 2000Hz

OUT6 B 2000Hz OFF

OUT7 C OFF OFF

OUT8 D OFF OFF

3:2x3-WAY+mono Sub OUT1 A 35.1Hz 153Hz

OUT2 A 153Hz 2000Hz

OUT3 A 2000Hz OFF

OUT4 B 35.1Hz 153Hz

OUT5 B 153Hz 2000Hz

OUT6 B 2000Hz OFF

OUT7 A+B OFF 81.1Hz

OUT8 A+B OFF 81.1Hz

4:2x4-WAY X-over OUT1 A OFF 81.1Hz

OUT2 A 81.1Hz 408.5Hz

OUT3 A 408.5Hz 2000Hz

OUT4 A 2000Hz OFF

OUT5 B OFF 81.1Hz

OUT6 B 81.1Hz 408.5Hz

OUT7 B 408.5Hz 2000Hz

OUT8 B 2000Hz OFF

5:1x5-WAY+3 Aux OUT1 A OFF 40.5Hz

OUT2 A 40.5Hz 153Hz

OUT3 A 153Hz 1000Hz

OUT4 A 1000Hz 3084Hz

OUT5 A 3084Hz OFF

OUT6 B OFF OFF

OUT7 C OFF OFF

OUT8 D OFF OFF

6:Mono Distri OUT1 ALL OFF OFF

OUT2 ALL OFF OFF

OUT3 ALL OFF OFF

OUT4 ALL OFF OFF

OUT5 ALL OFF OFF

OUT6 ALL OFF OFF

OUT7 ALL OFF OFF

OUT8 ALL OFF OFF

7:Ste. Distri OUT1 A+B OFF OFF

OUT2 C+D OFF OFF

OUT3 A+B OFF OFF

OUT4 C+D OFF OFF

OUT5 A+B OFF OFF

OUT6 C+D OFF OFF

OUT7 A+B OFF OFF

OUT8 C+D OFF OFF

Operation

Preset name Output Input source High-pass frequency Low-pass frequency

8:LCR + mono Sub OUT1 A 99.2Hz OFF

OUT2 B 99.2Hz OFF

OUT3 C 99.2Hz OFF

OUT4 D 99.2Hz OFF

OUT5 ALL OFF 99.2Hz

OUT6 ALL OFF 99.2Hz

OUT7 ALL OFF 99.2Hz

OUT8 ALL OFF 99.2Hz

9:4x4 Processor OUT1 A OFF OFF

OUT2 B OFF OFF

OUT3 C OFF OFF

OUT4 D OFF OFF

OUT5 OFF OFF OFF

OUT6 OFF OFF OFF

OUT7 OFF OFF OFF

OUT8 OFF OFF OFF

10:Muted all OUT1 OFF OFF OFF

OUT2 OFF OFF OFF

OUT3 OFF OFF OFF

OUT4 OFF OFF OFF

OUT5 OFF OFF OFF

OUT6 OFF OFF OFF

OUT7 OFF OFF OFF

OUT8 OFF OFF OFF

Specification

Input impedance 8K

Maxium input electrical level 4Vrms

Input CMRR 55dB

Input XLR DY-08

Sampling rate 48KHz

Output impedance 150

Maxium output electrical level 2Vrms

Output XLR DY-09

Input gain -40.0dB~12.0dB,step:0.1dB

Output gain -40.0dB~12.0dB,step:0.1dB

Input delay 682.52ms,step: 21us

Output delay 2000.02ms

step: 21us

EQ number 6 EQ each input channel, 4 EQ each output channel

EQ type Parametric,L-Shelf 6dB,L-Shelf 12dB,

H-Shelf 6dB,H-Shelf 12dB

EQ gain -30dB~15dB,step: 0.1dB

EQ frequency 19.7Hz~21.9kHz

PEQ bandwidth 0.016~4.000Oct

Crossover filter

Frequency 19.7Hz~21.9kHz,OFF

Slope 12,18,24,48dB

Type Butterworth, Bessel, Linkwitz

Limiter

Limiter threshold -20dBu~10dBu,step: 1dBu

Limiter ratio 1.2/1,1.5/1,2/1,3/1,4/1,6/1,10/1,20/1,Infinite

Attack time 0.5,1,2,5,10,20,50ms/dB

Release time 10,20,50,100,200,500ms/dB,1sec/dB

Performance

Frequency response 20Hz~20KHz( 0.1dB)

Dynamic range 102dB

Separate degree 100dB

THD 0.003%(1KHz,1Vrms)

Power AC90V~250V,50~60Hz

Fuse T1LA,250VAC

Watt 30W

Dimension 480mm*220mm*44mm

Weight 3.6KG

DIGISYNTHETIC CO.,LTD

Http://www.digisynthetic.com

E-mail:[email protected]

[email protected]

VERSION

V1.0

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Key Features

  • 24-bit Dual DSP technology
  • 4-inputs/8-outputs
  • Multiple crossover modes
  • 6-band input EQ & 4-band output EQ
  • Delay for each input and output
  • User-friendly interface
  • USB and RS485 connectivity
  • LCD display
  • Input and output level meters
  • Limiter on each output

Related manuals

Frequently Answers and Questions

What is the input impedance of the DIGISYNTHETIC DS428D?
The input impedance is 8K.
What is the maximum input electrical level of the DIGISYNTHETIC DS428D?
The maximum input electrical level is 4Vrms.
What types of EQ filters are available in the DIGISYNTHETIC DS428D?
The device features Parametric, L-Shelf (6dB and 12dB), and H-Shelf (6dB and 12dB) EQ filters.
What is the crossover filter's frequency range?
The crossover filter's frequency range is 19.7Hz to 21.9kHz, and it can be set to OFF.
What are the different crossover slopes available in the DIGISYNTHETIC DS428D?
The crossover slopes are 12dB, 18dB, 24dB, and 48dB per octave.
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