AudiogoN
Search Buy Sell Learn MyPage
 Learn > Forums > Speakers > 1333808475  Start New Thread | Log In | Bookmark This
  High quality subwoofer - which one?
I’ve owned my C4’s for about six months now, and they are excellent. But, you can’t ask a speaker to things it isn’t big enough to do. What that is, is to go FLAT to 20 Hz. The Vandersteen Quatro’s had built-in 250 watt class B powered subwoofers that are to die for once you hear them. The blemish on the Quatros, and it is a small one, was the slightly veiled lower midrange. The C4’s are absolutely seamless everywhere they go. The lowest bass can be fixed and most would probably say it’s not even necessary...until you hear a real sub system that is. Once you hear the effortlessly smooth low-end of a dedicated sub woofer you just can’t forget about it.

I started looking at subwoofers, and they are expensive, but relative to what this hobby’s cost(s) can be on some item(s), they are affordable. Well, ONE is affordable, anyway. I have three models that seem to all be nice products, and was curious what the feet on the street have used and your likes / dislikes. One model that I have not included needs an external hi-pass filter and I may be dismissing this model out of hand…and shouldn’t be and if you use this model, convince me.

I have a pretty large room (16’ wide x 40’ long x 8.5’ high (ceiling is split at 7.5’ and 9’)) so a bigger sub may be needed. Right now, I’m thinking ONE sub crossed-over pretty low. The C4’s do go pretty deep, but I probably agree that two would be “best” but expensive and the narrower room might make double placement hard. One is a snap, between the speakers away from the wall or near the right corner. I do not play “loud” (80-85 dB SPL average based on my radio shack SPL meter) but still like the smooth deep bass of a sub. Crazy loud isn’t the issue, but the sound quality is.

The choices are mind boggling in cost (JL Audio in mono or stereo) or mono (VELODYNE DD15+) verses stereo (SVS PB13 Ultra) set-ups at the same price. I have three options below to illustrate this.

The set-up that seems too expensive but outrageously good;
JL Audio Fathom f113 - $3600.00 / 13” / 2500 watts peak class D amplifier / sealed box.
But the sub needs a high-pass Cross-over like a Bryston 10B-STD @ $3,500.00

This is expensive compared to the SVS, but is it better than TWO SVS units?
Velodyne DD15 Plus - $4,000.00 / 15.0” / 1250 watt continuous class D amplifier / sealed box.

This seems like a good price but is the product good enough even if the price is? Use TWO of these in place of one DD15 Plus?
SVS PB13-Ultra - $2,000.00 / 13.5” / 1000 watts continuous class D / ported box.

So what have we done with subwoofers and why? This got real complicated real fast. Ported, vented, stereo at the same price as a mono sub ETC. The odds of auditioning these monsters are about zero as you hear the room. My room seems to be pretty good down low based on my Quatro set-up with powered subs. If a decision isn’t easy, I’m missing something…a lot of something’s it turns out.
Rower30  (Reviews | Threads | Answers | This Thread)

04-07-12
  Responses (1-34 of 34)
Click title to read one, or click date to read all below it.

04-07-12   Rower30, try running your c4s full range with 1 or 2 subs r ...   Danielk141

04-07-12   Two of any of these subs is probably better than one of any ...   Spinaker01

04-07-12   I have a rel with my b&ws and love what it can do. my low e ...   Dancer

04-08-12   Ime, the answer is a little involved: the velodyne dd serie ...   Martykl

04-08-12   Ok, we're getting some good info. right now, i'm really conf ...   Rower30

04-08-12   I use a single jl audio fathom f113 (no external cross-over ...   Sksos1

04-08-12   I' m also looking for sub to integrate with my c&c abbys. b ...   Mt10425

04-08-12   I believe that the reason that integrated high pass crossove ...   Martykl

04-08-12   Hi marty. you're likely correct, but i use my aos (art of s ...   Mt10425

04-08-12   I love to hear that the high-pass isn't needed but... if i ...   Rower30

04-08-12   Check vandersteen subs....   Stringreen

04-08-12: Martykl
Rower,

WHAT pray tell smooths out the C4's room bass response?

The obvious answer is "nothing". Most folks who run the main speaker full-range simply fit the sub's response "under" the rolled off bass response of the main speaker and live with the same ragged bass FR they had before adding the sub - they just get more extension, "air", etc. The point of this approach is to leave the main speakers' response intact. I think that this is rarely the best idea, but many others here disagree.

In any event, manual adjustment of the subwoofer's FR via parametric EQ (Velodyne DD) will let you really customize the fit as you "snug up" the top of the sub's output to the bottom of the mains'. I have run the Carver Cinema Ribbon Monitor (which have very little response below 100hz in-room) full range with DRC subs and gotten pretty good results. (Obviously, your C4 is a somewhat different animal than the CRM.)

But there is another approach, albeit one that is not ideal for a speaker that has extended bass response: You simply overlap the the sub and the main speaker up to a desired x-over frequency.

If you do want to try this approach with your C4, you could (depending on the DRC solution you choose) face different issues:

Full range DRC (ala Audyssey in an AVR) will smooth both sub and main until the "hand-off" is smooth. There should be no issue there.

Sub specific DRC (ala Velodyne) will allow you to attempt to manually "mold" the subs' response around the C4's output in the bottom octaves. That is, during set-up, you will see a video display of the summed bass response of the C4 run full range and the subwoofer. You adjust the sub via a combination of master sub volume level, placement, phase and (perhaps a touch of) parametric EQ such that you get enough subwoofer output to smooth all meaningful bass nulls. You then EQ the peaks via parametric attenuation until you have the smoothest possible overall FR below the sub's high cut frequency.

I can't swear that this approach will work well in any given room with any given sub/main combo, but it might work with some combos in some rooms. I'd recommend it only for those who REALLY don't want to interrupt the main signal path.

As I've indicated above, I definitely prefer to low cut the mains - but I described this "pure path" alternative to illustrate that you might be able to use DRC for the subwoofer without "corrupting" the sacred source->pre->power-> main chain. Not the way that I'd do it, but you could try.

Marty

As to optional high cut units, it sounds good, but you'd have to build a workable business case.

Martykl  (Reviews | Threads | Answers | This Thread)


04-08-12   The vandersteen 2wq subs come with a high-pass filter.....wh ...   Halcro

04-09-12   I have also had success with a single rel (older q150e). it ...   Wolf_garcia

04-09-12   I'm using two velodyne dd-12 plus' to fill the bottom octave ...   Vicdamone

04-09-12   New info so far; rel and vandersteen use a similar approach ...   Rower30

04-09-12   More info; i talked with paradigm about their sub1 at lengt ...   Rower30

04-09-12   Rower, i'd say that your argument for a pair of dd 12s is p ...   Martykl

04-10-12   Yes, i'm still not fully appreciative of a single sub. the l ...   Rower30

04-09-12   I forgot to mention purchasing velodyne. it seems velodyne h ...   Vicdamone

04-09-12   Rower, your last posting on the single paradigm sub seems to ...   Halcro

04-10-12   This article by richard hardesty convinced me to buy the van ...   Halcro

04-10-12   I've heard and implemented a fair number of subs with both s ...   Johnnyb53

04-10-12   This is a very interesting thread because i'm also dealing w ...   Erndog

04-10-12   Halcro, yes! that's exactly why i want to go stereo. rememb ...   Rower30

04-11-12   i think he's overstating the case. the lack of a high pass ...   Johnnyb53

04-11-12   Erndog: i received the same recommendation from barry, and h ...   Rtilden

04-11-12   Rower, with remote subwoofers.........one has the ability to ...   Halcro

04-11-12   Johnnyb53- my experience is that everybody has an opinion a ...   Erndog

04-11-12   Hi all ! the vandersteen's are excellent speakers . with th ...   Bradluke0

04-11-12   For erndog and rower: the nht is a very good unit. i used ...   Martykl

04-11-12   absolutely right. barry is probably playing the odds as far ...   Johnnyb53

04-12-12   First, vandersteen includes all those "nasty" eq s ...   Rower30

06-02-12   Rower i asked mr vandersteen if the eleven band eq could be ...   Ig316b


  Post your response
Subject


Your response

No html, but you may use markup tags


Username
Members only

Password