looking to get a sms 1

Check eBay, Audiogon, etc.

IF you're concerned about $$, use te Room EQ Wizard, Behringer Feedback Destroyer alternative. In some ways, it's a better solution.

Feedback destroyer bottoms out at 20HZ, sms at 15hz. What are you running that you need to kill 14hz?

Al the setup info is in the REW helpfiles. Super easy to do if you follow step by step. There are forums over at the Home Theater Shack if you need more info.

8024 is a graphic eq. Completely unusable unless you like comb filtering. You need a parametric eq.

FYI, the latest SMS-1 software lowers the filter to 5 Hz in case that matters.

FYI, if the reports are correct the SMS-1 also cuts off quite a bit of the lower frequencies with the SSF. There are graphs over on HTS.

JP

It does, but as JP said, even with the newest firmware and the lowest highpass setting, there is significant roll-off.

It should definitely protect your TC-2000s though.

Yep, I'm the one that smoked my TC2000s. I thought I had my LP about 15 HZ which I thought was a little over the 10HZ line on the slider of my Rane PE17, but I didn't have it high enough obviously. I should have used my SMS-1 for initial testing since it is MUCH easier to set-up but live and learn.

They sounded great for the couple minutes I listened to them before they bottomed out. The sound they made when they bottomed was absolutely gut wrenching - you don't want to hear it.

What amp are you using?

Good luck.

Yes, be sure to do it the right way. I have still not figured out what that is, but there are some very generous people on this board that are always ready to help. Good luck to you.

Steve, your Behringer 8024 (predecessor to the DEQ2496) will work just fine to EQ your sub. It's a better unit in every way than the Feedback Destroyer. Use the graphic EQ function for broad 'tone control' shaping and the parametric filters for 'problem' areas. While the lowest center frequency you can set is 20Hz, the shelving and band filters work well below there so you can, for example, boost below 20Hz by cutting the response above 20Hz.

I second the recommendation to use Room EQ Wizard (free) to measure things. All you need is a mic (get the Behringer ECM8000 which can also plug into your 8024) and a mic preamp (Rolls MP13 is good) and for about $100 you'll be stylin' at least as well as with the $$ Velodyne.

Edit: I see your main concern is protecting the driver below Fb. You can do that by boosting the response above 20 Hz with a broad parametric filter. The shape of the filter along with the 8024's own rolloff starting around 10Hz should give you adequate protection. Of course the Velodyne is easier to use so only you can decide if cheap or easy is more important to you.

I was bummed when I saw this

http://hometheaterhifi.com/forum/showthread.php?t=4640

And I have one. The thing I don't understand is that many sweared by it. Everyboby saying how it sounded so good even down low.

My wife bought me a BFD that was just dropped off yesterday. I did a little searching because the rolloff on the SMS-1 scared me and here's what I found - little to none

http://www.hometheatershack.com/foru...-roll-off.html

Vito,
I figured you knew.
My hope is that it will measure and correct down to where the filter is set, so I'd recommend to set it to 10hz 12db per octave or higher.

When I saw the foam plugs in your boxes, I figured you had bottomed the drivers a few times and decided to seal them up. With the lower tuning you should be much safer.



Later
Dan

Guys, I just picked up and SMS1 bran new on ebay from a memeber who's selling them cheap. His buy it now auctions are for $559, I waited it out and got it for $472. I have not recieved it yet but it appears to be and hopefully will be legit. Ebay is the place for these units it seems. He has a bunch from what he sais so get on there and check it out. Good luck.

I believe that few people notice it because the roll-off is probably very close to the average room gain for most people.

It is only the "crazies" who like loud bottom octave bass that would worry about this type of roll-off.

If it is true with all SMS-1's, I am amazed that a company like Velodyne would either design it this way or have really bad manuf. tolerances.

JP

I'm a bit taken aback by this as well, since the display from my SMS- 1 showed it to be flat down to 10hz....I don't like being lied to. However there is no denying that it does a great job in its' operating range and that the amount of useful material below that point is very limited, certainly with music anyway.

the display only goes to 15hz so being flat to 10hz is only speculation on your part unless you've verified it using other methofs.

as stated already room gain offers quite a bit of boost for most people down low....my sms shows flat to 15hz on my IB and I am down 2db at about 10hz..verified using truerta...

no one is lying to you...don't overlook the fact that the display on the SMS shows the system response including the room.

I'm going by memory on the SMS-1 so I stand corrected, thanks. (I'm using the Audyssey Pro now with great results.)

Good point on the room boost, but is that something that should automatically be compensated for? Is that inherent and consistent in all rooms?

I don't know if room gain should be compensated for, but Velodyne wouldn't be the first company to do this. Perhaps they designed the SMS-1 for the vast majority of users who have "average" ported box HT subs and didn't want to see a rash of blown drivers that could be attributed to their device.

It still strikes me as odd that an R&D-based company like Velo would put out a product with this type of compensation. Wonder if Bruce could clear this up for us?

JP

Has anyone seen the SMS 1 in silver? I thought I've seen them in some picture, my came in black !

Thanks

Djoel

Unless something has changed very recently, to my knowledge it has not been produced in anything other than black.

I have to look around ,and see where it was that I seen it in..Hmm

Thanks

Djoel..

Side note
The Dow is over 4K