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Subwoofers and Crossovers.

My system is Cary DMS-550 / Luxman L-507uxii / Spendor D7.2

 

After researching I decided to add an active crossover and two stereo subs to the system.

 

  1. I am looking at JL Audio CR-1 as the crossover.  This will take the pre-out from the Luxman and feed mains-in and setup the Luxman as separates. Is there anything else that I should look at?  I am only looking at analog solutions.
  2. After looking a REL, Rythmic, SVS, Martin Logan and JL, I am leaning towards getting two JL Dominion D110s.  Would these subs be sufficient or should I be getting JL E110s? I won’t be using the internal crossovers, so primary concern is fidelity.
  3. If I am unable to treat the room properly, I may be introducing a DSP solution just for the subwoofers.

 

I am looking for some advice from people who have walked this path before me on both the active crossover and the quality of D110s. 

I would appreciate any advice on this process of integrating subwoofers into a two channel audio system.

dimbhaka
avanti1960
1,476 posts
 

sorry to put a damper on your plans but i have the spendor d7.2 and previously the d7.  

tried to integrate 3 different set of subs, ML, JL audio and REL.  

you are on the right track trying to high pass the main speakers, the spendor's deep bass goes down to 25 hz in my room and trying to integrate theresigned  usual way never sounded right.  

the problem is that the spendors are so fast and dynamic, i always felt the subs were out of sync and holding the timing hostage.

after optimizing the placement of the spendors for bass response (try an audio note style corner loading, not too close, maybe 2 feet) and much experimentation, as well as an amplifier with sufficient bass power and control (pass labs) i decided the system was perfect without subwoofers.  

the d7.2 are very special speakers, fast and dynamic with deep bass due to the long flared port.  proceed with caution and see if they can't satisfy on their own.  

dimbhaka OP
30 posts
 

@avanti1960 While adding the subs did you high pass your mains or did you run them full range?

I am actually very happy with my setup.. but as is the case in this hobby one always wonders if things can be improved. Hence I am looking  at adding subs/crossovers.

In my room(fairly large) the system starts to roll off below 50Hz and there is nothing left by around 30Hz. Maybe I should look at my speaker placement more critically.

 

 

 

ozzy's avatar
ozzy
7,464 posts
 

I am using a JL CR-1 crossover along with 4- JL F-113 subs. I have my speakers about 8 feet out from the back wall. This allows some very open soundstage albeit at a loss of the low bass that usually comes with closer rear wall reinforcement.

Adding the subs to crossover at about 55hz. brings back that low bass that is missing.

It also frees up the main speakers to sound there best.

ozzy

artemus_5's avatar
artemus_5
1,928 posts
 

@dimbhaka  @kenjit 

To low Pass Filter or NOT to Low Pass Filter. That is the question. I am a Rel fan and have had them for 20 yrs. Here is their take on the Low Pass Filter. Make what you will of their position

Low Pass Filter?

dimbhaka OP
30 posts
 

@ozzy  thanks for the information. Do you see the benefits of high-passing the mains at low volume too or just at high volume?

 

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