DCX2496 and volume control

RogerCl · 2nd August 2004, 04:29 PM

Hello,

the DCX2496 is a powerful loudspeaker controller. But tests are showing that DCX2496 badly need full input signal level and a better volume control.

Decreasing the volume DCX2496 delivers sound losses. A way to get out of this problem is a good multichannel potentimeter. Has anyone experiences with such potis like this one: http://www.thel-audioworld.de/bauteile/regler/Potis.htm
Text is in German but pictures are explaining something I´m talking of. Channel synchronization is less than 0,5dB, tolerance +-10%.

A next way to adjust volume control is perhaps use of a level control box as the Big Knob by Mackie.
http://www.mackie.com/products/bigknob/index.html

Has somebody used such a level control box?

RogerC

janneman · 2nd August 2004, 06:22 PM

Roger,

There are several DCX-threads on the forum discussing exactly this issue. You may wish to read them.

Jan Didden

RogerCl · 2nd August 2004, 07:06 PM

Jan,

yes there are several DCX threads. And I have read many of them. Especially the project of Charley Oehlrich make me hopeful with DCX2496. http://www.diyaudio.com/forums/showt...867#post350867

I´m asking for other diy fellows who have same good results with volume controls in connection with DCX2496.

The volume controller Big Knob by Mackie I haven´t seen yet in the threads. Search function delivers no result.

Roger

NH7RO · 2nd August 2004, 07:57 PM

Roger, I'm expecting delivery of my 6 channel post-DCX volume control by Paul Hilgeman in the next few weeks and I'll post my impressions here soon thereafter. If you search Paul's posts you'll find the thread. Cost is around $400 USD and has XLR inputs, RCA outputs (but Paul also offers the plans for this VCA tpe control if you prefer to diy...) and can be made for more than six channels if needed.
Cheers, Jeff

RogerCl · 2nd August 2004, 08:19 PM

Jeff,

thanks for your posting. I´m waiting for your soon coming testing review of Paul Hilgeman´s volume control.

Roger

Davey · 2nd August 2004, 10:05 PM

Gents,

The volume control Paul is building is a design using Analog SSM2018T VCA chips. You can see the original prototype and design here:

http://home.comcast.net/~dreite/prea...me_control.htm

This unit has been in use with my DCX2496 for many months now and its operation is excellent in my opinion. Totally transparent with excellent useability and "feel."

Cheers,

Davey.

Petter · 3rd August 2004, 12:27 AM

I am using Apox remote controlled switched relay setup. Several threads on this forum

Petter

sasha · 3rd August 2004, 01:52 AM

Little off topic, does anybody know what is the reason for DCX problem with display. What parts needs to be replaced?
Thanks.

RogerCl · 3rd August 2004, 05:37 AM

The volume control by Paul Hilgeman looks great and in my opinion the VCA solution of Paul should have no problems with channel synchronization (like potis have), because each VCA circuit is identical to the other five.

Roger

EC8010 · 26th October 2004, 05:17 PM

The other (purely passive) possibility is to use a stepped attenuator. I use a four-gang (only two-way system at the moment) on my DCX2496.

2nd August 2004, 04:29 PM	#1
RogerCl diyAudio Member Join Date: Mar 2003 Location: Munich / München	DCX2496 and volume control Hello, the DCX2496 is a powerful loudspeaker controller. But tests are showing that DCX2496 badly need full input signal level and a better volume control. Decreasing the volume DCX2496 delivers sound losses. A way to get out of this problem is a good multichannel potentimeter. Has anyone experiences with such potis like this one: http://www.thel-audioworld.de/bauteile/regler/Potis.htm Text is in German but pictures are explaining something I´m talking of. Channel synchronization is less than 0,5dB, tolerance +-10%. A next way to adjust volume control is perhaps use of a level control box as the Big Knob by Mackie. http://www.mackie.com/products/bigknob/index.html Has somebody used such a level control box? RogerC

2nd August 2004, 06:22 PM	#2
janneman diyAudio Member Join Date: May 2002 Location: Where Germany, The Netherlands and Belgium meet Blog Entries: 6	Roger, There are several DCX-threads on the forum discussing exactly this issue. You may wish to read them. Jan Didden __________________ /Another new issue: Linear Audio Volume 3!

2nd August 2004, 07:57 PM	#4
NH7RO diyAudio Member Join Date: May 2003 Location: Naalehu, Hawaii	post-dcx volume control Roger, I'm expecting delivery of my 6 channel post-DCX volume control by Paul Hilgeman in the next few weeks and I'll post my impressions here soon thereafter. If you search Paul's posts you'll find the thread. Cost is around $400 USD and has XLR inputs, RCA outputs (but Paul also offers the plans for this VCA tpe control if you prefer to diy...) and can be made for more than six channels if needed. Cheers, Jeff

3rd August 2004, 01:52 AM	#8
sasha diyAudio Member Join Date: Aug 2002 Location: Canada	DCX2496 and display problem Little off topic, does anybody know what is the reason for DCX problem with display. What parts needs to be replaced? Thanks.

26th October 2004, 05:17 PM	#10
EC8010 diyAudio Moderator Join Date: Jan 2003 Location: Near London. UK	The other (purely passive) possibility is to use a stepped attenuator. I use a four-gang (only two-way system at the moment) on my DCX2496. __________________ The loudspeaker: The only commercial Hi-Fi item where a disproportionate part of the budget isn't spent on the box. And the one where it would make a difference...


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2nd August 2004, 07:06 PM	#3
RogerCl diyAudio Member Join Date: Mar 2003 Location: Munich / München	Jan, yes there are several DCX threads. And I have read many of them. Especially the project of Charley Oehlrich make me hopeful with DCX2496. http://www.diyaudio.com/forums/showt...867#post350867 I´m asking for other diy fellows who have same good results with volume controls in connection with DCX2496. The volume controller Big Knob by Mackie I haven´t seen yet in the threads. Search function delivers no result. Roger

2nd August 2004, 08:19 PM	#5
RogerCl diyAudio Member Join Date: Mar 2003 Location: Munich / München	Jeff, thanks for your posting. I´m waiting for your soon coming testing review of Paul Hilgeman´s volume control. Roger

2nd August 2004, 10:05 PM	#6
Davey diyAudio Member Join Date: Dec 2001 Location: Bremerton, WA.	Gents, The volume control Paul is building is a design using Analog SSM2018T VCA chips. You can see the original prototype and design here: http://home.comcast.net/~dreite/prea...me_control.htm This unit has been in use with my DCX2496 for many months now and its operation is excellent in my opinion. Totally transparent with excellent useability and "feel." Cheers, Davey.

3rd August 2004, 12:27 AM	#7
Petter diyAudio Member Join Date: Jan 2001 Location: Scandinavia	I am using Apox remote controlled switched relay setup. Several threads on this forum Petter

3rd August 2004, 05:37 AM	#9
RogerCl diyAudio Member Join Date: Mar 2003 Location: Munich / München	The volume control by Paul Hilgeman looks great and in my opinion the VCA solution of Paul should have no problems with channel synchronization (like potis have), because each VCA circuit is identical to the other five. Roger

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