Go Back   Home > Forums > >
Home Forums Rules Articles diyAudio Store Blogs Gallery Wiki Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Solid State Talk all about solid state amplification.

Pre-out to miniDSP and back to receiver power amp
Pre-out to miniDSP and back to receiver power amp
Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Thread Tools Search this Thread
Old 9th January 2012, 04:13 AM   #1
focal7C is offline focal7C  Australia
diyAudio Member
Join Date: Jan 2008
Default Pre-out to miniDSP and back to receiver power amp

How do you "configure" and integrated amp with pre-out to a miniDSP used as an active crossover. Then feed the miniDSP LF signals back into the power amp section (to woofers) and HF signals to an external power amp (to tweeters).

The amplifier I'm using is a Cyrus 8vs2. Does it have jumpers or internal contacts so that when RCA connector is plugged into the pre-out, the contacts open seperating the pre out and main in? Thus if jumpers are removed or rewired with additional main-in RCA plugs these would take LF into the integrated amp.

The reason is to only have to build/buy one new stereo power amplifier (and the 8vs2 is a good pre-amp and power-amp).
  Reply With Quote
Old 9th January 2012, 05:04 AM   #2
focal7C is offline focal7C  Australia
diyAudio Member
Join Date: Jan 2008
It may also be possible for the pre-amp to be operational in the following mode. However this is not clear. If that is the case the miniDSP would pretend to be a multi-channel surround sound decoder (taking its input from the pre-out), 2-way cross over between HF/LF, control volume and balance between LF (fed back into main-in) and HF (fed into an external power amp).

From the Cyrus 8vs2 manual:
"Connecting a Surround Sound decoder (other brand)
If your system includes a multi-channel surround sound decoder (but not a Cyrus model), it may be connected through your amplifier to drive the front channel speakers. In this case, connect a stereo phono interconnect from the front channel outputs of the surround decoder to one of the Analogue Inputs of the amplifier. For this system to function correctly, the ‘AV Direct’ input name must be set for the input used (see ‘Input names’ in the ‘Setup menu’ section).

When set up in this way, the amplifier will automatically lock its volume setting to a fixed level to match the output of the surround decoder. CAUTION: The ‘AV Direct’ input name should only be used for surround decoders that include a volume control, as the volume control of your amplifier will be fixed at a very high level."

Last edited by focal7C; 9th January 2012 at 05:08 AM.
  Reply With Quote
Old 18th January 2012, 06:09 AM   #3
focal7C is offline focal7C  Australia
diyAudio Member
Join Date: Jan 2008
Default Cyrus support response

The following is part of response from a Cyrus support rep:

"To enable AV Direct on an 8VS2 you need to hold down the AV and Standby key simultaneously as power is applied to the unit, either from the rocker switch on the rear of the unit or the mains supply. Keep the buttons depressed until the lights have finished going back to front on the unit. Now when you select the AV input, the volume is disabled and the amplifier is now at full volume. The light on the volume control will be fixed at around 2.00 on the dial."

When this input is in AV Direct mode it is a straight through and disables volume control on the 8VS."

This sets it at full volume! Therefore an attenuator after (or part of) the active crossover is required (before signal fed back in to the power amp "section").
  Reply With Quote


Pre-out to miniDSP and back to receiver power ampHide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Audio interface receiver chip for DTS/Dolby(AC-3) to miniDSP avi198617 Digital Line Level 2 2nd December 2011 02:00 PM
MiniDSP after active pre sts9fan miniDSP 1 22nd April 2011 04:01 AM
Borrowing +/-15V from receiver for pre-amp mattybe Solid State 2 16th April 2009 07:09 AM
neg feed back into v/slope stereo 2 pre-amp pointy Tubes / Valves 0 17th March 2009 12:29 AM
what is the difference between a pre-amp and a receiver cbosek Music 2 26th August 2003 04:37 AM

New To Site? Need Help?

All times are GMT. The time now is 10:38 AM.

Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 15.79%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Copyright ©1999-2017 diyAudio