Thanks Tom. I Have A Couple Of More Questions, Ok?

Posted by thetubeguy1954 (A) on October 20, 2010 at 13:34:03

In Reply to: RE: I Need More Help To Understand posted by tomservo on October 20, 2010 at 09:45:35:

Thanks Tom! I'll inform whoever builds my boxes about the 10" bracing rule and I'll definitely cross-brace, I'd rather over-brace than under-brace anyway. I'll be using a seperate solid state power amp for these sub-woofers, so I'll definitely have control over their volume vs the Sachikos. I'd like to ask a couple more questions, if you don't mind. You said either make one a ten cubic foot cabinet for both drivers –or- make two five cubic foot enclosures for one driver each. Am I mistaken in believing those are minimum dimensions? In other words can I make these boxes too big?

The reason I ask that is I actually wanted to make the cabinets for these woofers as close as possible to the size and shape of the Sachikos and place them just to the outside of them. The Sachiko's measurements are 72"H x 12.5"W x 19"D and I was originally thinking of making the woofer cabinets 72"H x 18"W x 18"D Is that possible or will I ruin something? Sorry Tom I honestly don't know about DIYing speakers and I'm attempting to learn. Now speaking of the woofers enclosures, I thought that Fb was a tuning frequency of a ported enclosure. So are these woofer enclosures you've mentioned sealed box or ported enclosures?

I really don't see needing the subwoofers to be used any higher than 100Hz, but you previously said "...cross this into your system as high in frequency as possible as the lower the crossover F and or greater slope, the greater the crossover delays involved are" so what frequency do you think I should cross over at? Maybe this will help. When my friends did a frequency test of the Sachikos with the FE208ES-R drivers installed as the test continued dropping down in frequency from 200Hz to 160Hz to 125Hz to 100Hz all was fine. However at 80Hz it was 3dB. then from 63Hz to 50Hz it was down 6dB, and finally by 40Hz the bass output was down a full 12dB! I have a chance to purchase a used Velodyne's SMS-1 (Subwoofer Management System)that a friend who originally purchased two, is offering to sell me. All it's different functions tested & reviewed at the link below.

Finally my audio room is 15.5'L x 12.5'W with a ceiling that slopes from 8' (where the speakers are) to 10' (where I sit) on the 12.5 wall. The only thing that seperates the audio room from the 12.5'L x 12.5'W kitchen is a wall that juts out 3' and extends from floor to ceiling on the side where the ceiling is 10'H. On the other end of the kitchen the only thing that seperates my kitchen from the 9.9'L x 12.5'W dining room is another wall that juts out 3' and extends from floor to ceiling on the opposite side where the ceiling is 8'H. Finally believe it or not nothing seperates the dining room from my 15.5'L x 12.5'W living room. So I "think", but I've been told I'm wrong that my speakers will "see" that entire space! However "if" I am correct in that case the length that a bass wavelength can "see" is now almost 54' in total. I added the length of the audio room 15.5 + the kitchen length 12.5 to the width of the dining room 12.5 to the width of the living room 15.5 because they form an L on it's side altogether

Thetubeguy1954 (Tom Scata)

SETriodes Forum -- Central Florida Audio Society -- Fullrange Drivers
==============================================================
"The man that hath no music in himself nor is not moved with concord of
sweet sounds is fit for treasons, stratagems and spoils."
- William Shakespeare

Thetubeguy1954 (Tom)

Central Florida Audio Society -- SETriodes Group -- Space Coast Audio Society
Full-range/Wide-range Drivers --- Front & Back-Loaded Horns --- High Sensitivity Speakers

Velodyne's SMS-1 (Open in New Window)

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Follow Ups Full Thread

Topic - Is Replicating Bass Even Possible In The Average Room? - thetubeguy1954 14:00:42 10/18/10 (31)

RE: Is Replicating Bass Even Possible In The Average Room? - IEaudiodude 06:08:43 11/10/10 (0)

of course - Bruce from DC 16:25:51 11/09/10 (0)

It is but not with OB bass systems - Steyr 07:27:28 10/21/10 (3)

RE: It is but not with OB bass systems - Drew Eckhardt 15:30:22 10/21/10 (0)

RE: It is but not with OB bass systems - Inmate51 07:50:52 10/21/10 (1)

RE: It is but not with OB bass systems - Steyr 07:55:35 10/21/10 (0)

RE: Is Replicating Bass Even Possible In The Average Room? - Inmate51 19:31:05 10/20/10 (0)

As An Observation, Looking at Your Rig - Not With Your Speakers... - Doug Schroeder 07:09:14 10/19/10 (8)

RE: As An Observation, Looking at Your Rig - Not With Your Speakers... - thetubeguy1954 08:33:04 10/19/10 (7)

Well Then, I Guess You Have Heard Bass in Your Room... - Doug Schroeder 14:17:54 10/19/10 (1)

What about bass "quality"? - Robert C. Lang 17:32:34 10/19/10 (0)

RE: As An Observation, Looking at Your Rig - Not With Your Speakers... - tomservo 12:16:31 10/19/10 (3)

I Need More Help To Understand - thetubeguy1954 08:29:42 10/20/10 (2)

RE: I Need More Help To Understand - tomservo 09:45:35 10/20/10 (1)

Thanks Tom. I Have A Couple Of More Questions, Ok? - thetubeguy1954 13:34:03 10/20/10 (0)

consider the headphone - badman 09:12:45 10/19/10 (0)

Yes Tom - morricab 05:02:59 10/19/10 (0)

Sure it is - Bill Way 22:40:07 10/18/10 (0)

Yes!! - henrybasstardo 21:56:51 10/18/10 (0)

The Problem with Small Rooms - Brian A 18:42:06 10/18/10 (0)

Think about what you are asking - Robert Hamel 18:28:04 10/18/10 (0)

Yes you can if you just follow some simple rules. - Mr. Dick Hertz 16:44:59 10/18/10 (3)

That Was Good {nt} - thetubeguy1954 08:37:09 10/19/10 (0)

RE: Yes you can if you just follow some simple rules. - IEaudiodude 16:52:14 10/18/10 (1)

You betcher ass bass like bass! nt - Mr. Dick Hertz 19:43:19 10/18/10 (0)

Another thing to consider is that many of us do not... - DeKay 16:31:44 10/18/10 (1)

Good point..A well placed adjacent room can serve as a bass trap - Robert C. Lang 17:50:20 10/19/10 (0)

I think it depends on how much distortion you find acceptable. - genungo 16:02:13 10/18/10 (0)

RE: Is Replicating Bass Even Possible In The Average Room? - tomservo 14:54:20 10/18/10 (0)

RE: Is Replicating Bass Even Possible In The Average Room? - Iron Knee 14:39:16 10/18/10 (0)

Doubtful........... - kavakidd 14:18:31 10/18/10 (0)

Follow Ups

Thanks Tom. I Have A Couple Of More Questions, Ok? - thetubeguy1954 13:34:03 10/20/10 (0)

Thanks Tom. I Have A Couple Of More Questions, Ok?

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