How to hook up new pre-amp/amp with a sub??? - AVS Forum
Forum Jump: 
 
Thread Tools
post #1 of 16 Old 03-25-2008, 09:27 AM - Thread Starter
AVS Special Member
 
oldschool4life's Avatar
 
Join Date: Sep 2004
Location: Northern Virginia
Posts: 1,683
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 10
I have a Parasound Halo P3 stereo pre-amplifier along with an A23 stereo amplifer; I also have an Adire Audio Rava subwoofer.

For now, I'm using un-balanced RCA's; I'm working on getting balance XLR's.

Should I go from pre-amp to subwoofer in/out to amp; or, should I go from pre-amp to amp in/out to subwoofer?

Right now, I have it pre-amp to subwoofer to amp...

Quote:
Originally Posted by oink
Mr. Cialella is, without question, the AVS honorary MOST ADMIRED PERSON OF THE YEAR.:D
oldschool4life is offline  
Sponsored Links
Advertisement
 
post #2 of 16 Old 03-25-2008, 10:41 AM
Advanced Member
 
twitch54's Avatar
 
Join Date: Aug 2006
Location: SE Pa
Posts: 598
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 12
Not familiar with your sub, but assuming it's powered, I would run one pair of I/C's from pre to it and another pair from pre to your amp.
twitch54 is offline  
post #3 of 16 Old 03-25-2008, 10:47 AM - Thread Starter
AVS Special Member
 
oldschool4life's Avatar
 
Join Date: Sep 2004
Location: Northern Virginia
Posts: 1,683
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 10
Pre-amp has one set out
Subwoofer has one set in/one set out
Amp has one set in/one set out

Quote:
Originally Posted by oink
Mr. Cialella is, without question, the AVS honorary MOST ADMIRED PERSON OF THE YEAR.:D
oldschool4life is offline  
post #4 of 16 Old 03-25-2008, 10:53 AM
AVS Special Member
 
whoaru99's Avatar
 
Join Date: Dec 2004
Posts: 6,960
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 67
If the sub has a high pass filter that affects the line output jacks then I think you should go preamp>sub>power amp - unless you wanted to run your speakers as full range. If so, see below.

If the line outs on the sub don't have HPF on them, then it works either preamp>sub>power amp or preamp>power amp>sub or to "Y" off at the preamp and feed each from the "Y".

In the latter case, I'd use whichever costs less and or uses less cabling.

Just because there is a knob doesn't mean you should turn it.
whoaru99 is offline  
post #5 of 16 Old 03-25-2008, 11:07 AM - Thread Starter
AVS Special Member
 
oldschool4life's Avatar
 
Join Date: Sep 2004
Location: Northern Virginia
Posts: 1,683
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 10
I can't remember if Adire's plate amps have high-pass outs...

Quote:
Originally Posted by oink
Mr. Cialella is, without question, the AVS honorary MOST ADMIRED PERSON OF THE YEAR.:D
oldschool4life is offline  
post #6 of 16 Old 03-25-2008, 11:19 AM
AVS Addicted Member
 
sivadselim's Avatar
 
Join Date: Oct 2004
Location: CO
Posts: 16,081
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 51 Post(s)
Liked: 68
Quote:
Originally Posted by whoaru99 View Post

If the sub has a high pass filter that affects the line output jacks then I think you should go preamp>sub>power amp.............

That doesn't make sense. I think you mis-typed, there.


Even if the sub's outs are unfiltered, I wouldn't pass the pre-amp level signal through the sub prior to the amp. If you must pass-through something, I'd pass-through the amp, first, on the way to the sub. I would think the sub would have greater chance of "dirtying" a passed-through signal than the amp. It is most important that the cleanest, most unadulterated, signal get to the amp. With the sub, that's not as important (although doubtful the amp "dirties" the signal). As pointed out, you can split the signal out of the pre-amp with Ys, although I see no good reason to do this.

"All men are frauds. The only difference between them is that some admit it. I myself deny it."
sivadselim is offline  
post #7 of 16 Old 03-25-2008, 03:49 PM
AVS Special Member
 
whoaru99's Avatar
 
Join Date: Dec 2004
Posts: 6,960
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 67
I think I got it right...let's try this...

Many subs have low level input jacks (line in) and low level output jacks (line out). Most of the line out jacks are straight pass-though of the line in signal, however some subs (such as SVS PB13-Ultra) have HPF on these line out jacks.

So, if the sub in question has HPF on the line out jacks, then I suggest the OP connect preamp>sub>power amp so the power amp receives a HPF'ed signal. That way, the crossover in the sub fully manages the x-over between sub and HPF'ed mains, and the mains amplifier has to amplify only a HPF signal rather than full range signal - biamp, if you will.

Just because there is a knob doesn't mean you should turn it.
whoaru99 is offline  
post #8 of 16 Old 03-25-2008, 03:58 PM
AVS Addicted Member
 
sivadselim's Avatar
 
Join Date: Oct 2004
Location: CO
Posts: 16,081
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 51 Post(s)
Liked: 68
Quote:
Originally Posted by whoaru99 View Post

I think I got it right...let's try this...

Many subs have low level input jacks (line in) and low level output jacks (line out). Most of the line out jacks are straight pass-though of the line in signal, however some subs (such as SVS PB13-Ultra) have HPF on these line out jacks.

So, if the sub in question has HPF on the line out jacks, then I suggest the OP connect preamp>sub>power amp so the power amp receives a HPF'ed signal. That way, the crossover in the sub fully manages the x-over between sub and HPF'ed mains, and the mains amplifier has to amplify only a HPF signal rather than full range signal - biamp, if you will.

I was not under the impression that he is at all interested in high-passing his speakers (amp), as he is asking about the 2 different options, one of which will definitely NOT high-pass his speakers (amp) no matter the nature of his sub's outputs. So, I thought what you were trying to say was that if the sub DOES high-pass it's outputs, then he would NOT want to pass the signal through the sub.

"All men are frauds. The only difference between them is that some admit it. I myself deny it."
sivadselim is offline  
post #9 of 16 Old 03-25-2008, 07:37 PM
AVS Special Member
 
whoaru99's Avatar
 
Join Date: Dec 2004
Posts: 6,960
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 67
Perhaps the high pass on the mains is an option not previously considered, and perhaps it's not even an option with that sub.

So, now there are more things to think about.

Just because there is a knob doesn't mean you should turn it.
whoaru99 is offline  
post #10 of 16 Old 03-28-2008, 08:48 PM - Thread Starter
AVS Special Member
 
oldschool4life's Avatar
 
Join Date: Sep 2004
Location: Northern Virginia
Posts: 1,683
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 10
According to the Rava manual attached to another thread:
High-level out is high-passed; low-level out is not.

Quote:
Originally Posted by oink
Mr. Cialella is, without question, the AVS honorary MOST ADMIRED PERSON OF THE YEAR.:D
oldschool4life is offline  
post #11 of 16 Old 03-29-2008, 08:18 AM
Advanced Member
 
twitch54's Avatar
 
Join Date: Aug 2006
Location: SE Pa
Posts: 598
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 12
We're talking two channel stereo....correct ? Do you know the freq at which your L/R speakers begin to to 'roll off' ?

Ok, assuming you are and do(to the afore mentioned) ! here's what I suggest....

run a seperate pair of interconnects from your preamp to your line level inputs on the sub. "Roll" your sub in @ the point that your main L/R speakers "roll off" with a corresponding high enough slope (18-24 degrees) so that the sub transitions out of the way quick enough. Tweek and Twitch from there !
twitch54 is offline  
post #12 of 16 Old 03-29-2008, 10:26 AM
AVS Addicted Member
 
sivadselim's Avatar
 
Join Date: Oct 2004
Location: CO
Posts: 16,081
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 51 Post(s)
Liked: 68
Quote:
Originally Posted by twitch54 View Post

We're talking two channel stereo....correct? Do you know the freq at which your L/R speakers begin to to 'roll off'?

run a seperate pair of interconnects from your preamp to your line level inputs on the sub. "Roll" your sub in @ the point that your main L/R speakers "roll off" with a corresponding high enough slope (18-24 degrees) so that the sub transitions out of the way quick enough.

We still do not know what his speakers are, but I agree that for a stereo setup with the equipment listed there is no reason to high-pass the speakers. They should be allowed to perform to their fullest potential with the sub only filling in the bottom-end.

However the OP has only one pair of L/R pre-outs, so he has 3 (not 2) options:

1) Pre-amp > amp > sub
2) Pre-amp > sub > amp
3) Pre-amp > Y-adapters > sub and amp

"All men are frauds. The only difference between them is that some admit it. I myself deny it."
sivadselim is offline  
post #13 of 16 Old 03-29-2008, 11:26 AM
Advanced Member
 
twitch54's Avatar
 
Join Date: Aug 2006
Location: SE Pa
Posts: 598
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 12
Therefor option #3 based on my proposl.
twitch54 is offline  
post #14 of 16 Old 03-29-2008, 11:57 AM
AVS Addicted Member
 
sivadselim's Avatar
 
Join Date: Oct 2004
Location: CO
Posts: 16,081
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 51 Post(s)
Liked: 68
Quote:
Originally Posted by twitch54 View Post

Therefor option #3 based on my proposl.

Yeah, 2 definitely out and I guess it is best to split than pass-through anything.

"All men are frauds. The only difference between them is that some admit it. I myself deny it."
sivadselim is offline  
post #15 of 16 Old 03-30-2008, 12:42 PM - Thread Starter
AVS Special Member
 
oldschool4life's Avatar
 
Join Date: Sep 2004
Location: Northern Virginia
Posts: 1,683
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 10
Right now, I'm using a pair of the larger (6 1/2) Sapphire Audio bookshelfs...

...next purchase is a pair of towers or a pair of good bookshelfs.

So far, I like Quad & Paradigm...

Quote:
Originally Posted by oink
Mr. Cialella is, without question, the AVS honorary MOST ADMIRED PERSON OF THE YEAR.:D
oldschool4life is offline  
post #16 of 16 Old 03-31-2008, 09:57 PM
Newbie
 
wndrmke's Avatar
 
Join Date: Nov 2007
Location: Las Vegas
Posts: 8
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 10
P3 has one set of balanced outputs, and one set unbalanced according to pg. 22 of the manual both sets are active.

XLR 's to A23/RCA's to sub, adjust sub crossover and level...enjoy.
wndrmke is offline  
Reply 2 Channel Audio

User Tag List

Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page


Forum Jump: 

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
Trackbacks are Off
Pingbacks are Off
Refbacks are Off