Pair of Rel S510’s or Carbon Special’s?


I’ve been considering adding subs to my system and am considering whether to go with S510’s or Carbon Specials…. Any thoughts? Here is my situation:

-Very large open room (open concept) with high vaulted ceilings

-B&W 802 D2’s

-Gryphon Diablo 300 amp

-Looking for MILD and subtle bass support for my speakers in my big room. For reference I tried the new, larger B&W 801 D4 speakers with my amp and thought there was way too MUCH bass…

-Despite the large room, the layout makes large subs out of the question. Carbon Specials would work. But size-wise would prefer the slightly smaller S510’s

-Don’t care about home theatre

-I do care about speed and bass definition and quality.  The more bass nuance and detail the better.

-I don’t care that much about getting down to the very lowest frequencies. Just need a bit lower than what my 802’s do

-Subs will be positioned about 6” on the outside of each main speaker. This is the ONLY place they could go…

-I’ve invested heavily in quality cabling (Nordost Valhalla 2 speaker cables, AudioQuest Dragon power cord, etc) and have a USB reclocker and network isolation switch. Just pointing out as all these elements have added precision, ambience, clarity and space to the sound of my system.

Anyone with experience in both the S510 and the Carbon Special have any thoughts on which way to go?

 

 

nyev

@onhwy61 , you are right, I am a bit worried about positioning.  But I’m hoping the big open room makes the one available position okay.  There are no room corners to consider with my open concept house.  But there is an island on the left and another obstacle on the right that limits the position of the subs to 6” on the outside of each speaker.

@nyev 

I am a bit worried about positioning.

This is why my post about Rythmik is quite pertinent to you. If you are already married to REL, then you can disregard. I have both. They both sound good, but Rythmiks solved the room integration puzzle.

@hilde45 , interesting subs and delayed phase feature, but to me it sounds like in my case I shouldn’t need a delayed phase feature since the subs will be practically in the same spot as my mains.  Seems to me this would be useful for when your subs are further away from the listener than the mains…

I have been there and was an owner of the S510 and now JL. I have a few thoughts about your situation based on my experience:

1) The S510s are too small for a large room with large speakers.

2) I would try the DSP function to see if you can get what you want. Its free and easy. That would be a way better solution than subs. I do not have Roon, though.

3) I would be personally be inclined to take advantage of the Diablo’s sub outputs and get a different brand of subwoofer. REL company encourages high level inputs on their subs. Not the biggest deal. I found low level inputs are more user friendly, plus it eliminates any possible annoyance with pops and noise.

4) There is no substitute for positioning subs correctly. The room will dictate it. I do not know if you will be lucky. REL has an approach of coming in with the bass at a lowest volume level and frequency and time aligning with the main speakers based on moving the sub or speaker forwards or backwards. JL Audio is different in that the goal is smooth frequency response phase centered around 80Hz suggested crossover point and phase control setting.

5) The idea of ’speed’ (lack of resonance?) of the subwoofer does not matter unless the subs are well integrated in to the room.