The famous 3db question - Home Theater Forum and Systems - HomeTheaterShack.com

 
Thread Tools
post #1 of 4 Old 04-09-12, 03:45 PM Thread Starter
Shackster
 
Join Date: May 2010
Posts: 68
My System
The famous 3db question

Allright, here's the deal.

Most of you have already read my 35 sim build thread for my RE Audio SX18 woofer in a 6ft sealed box.

I'm almost at the finally if weather can actually warm up a bit and allow me to work outside.

Now, I have found a very good deal online for another box exactly like mine but with an older 18 inch from Mach audio, the IXL 18.4.

Its built exactly like mine but the drivers model a bit differently. The Mach5 has a slight increase (3db) in almost everything under 50hz and its the opposite above it.

My intention is to have my DHC 80.1 handle that slight difference.

I'm using an EP2000 amplifer bridged on my RE audio right now and it sounds great.

Should I buy another amp to drive the mach 5 or use the same for both.

That would net me 400w per woofer vs 799 measured if I used 2 amps.

At worst if it sounds too terrible I will sell the RE audio and get another mach 5 driver to fill the hole.

Thoughts ?
Scyan is offline  
Sponsored Links
Advertisement
 
post #2 of 4 Old 04-09-12, 04:51 PM
Senior Shackster
 
Join Date: Nov 2011
Location: St. Louis, MO
Posts: 147
Re: The famous 3db question

While you lose 3db from the one sub, you are gaining a complete second driver. A 3db drop is a very slight change, but the addition of the second sub will be a very significant gain, so you'll probably never run to the point where you miss the "last watt." Plus the benefits of smoothing the room response by adding the second sub: IMHO it's a no-brainer- go for it! (You can always add the other amp later if you find the need.)

Tom
tshifrin is offline  
post #3 of 4 Old 04-09-12, 10:22 PM
Plain ole user
 
lcaillo's Avatar
Tech Guru
 
Join Date: May 2006
Location: Gainesville, FL, USA
Posts: 11,121
Send a message via AIM to lcaillo
Re: The famous 3db question

3db is a slight change? Actually, if you deliver the same power, adding the other sub is going to give you a 3dB increase.




Looking for me, just google my username. I have used the same one for most sites for many years.
lcaillo is offline  
 
post #4 of 4 Old 04-10-12, 06:08 PM Thread Starter
Shackster
 
Join Date: May 2010
Posts: 68
My System
Re: The famous 3db question

All very valid points.

I got the subwoofer now, paid 100$ for the woofer inside a box like the one I built... go figure.

The guy was in a small appt. He used to have a home theater in his basement and moved out of the house. Hadn't been turned on in over a year.

It looks brand new and has no finishing on it, still on MDF. So I'm pretty lucky because I will finish both the exact same way.
Scyan is offline  
Reply

Bookmarks

Tags
3db , famous , question

Quick Reply
Message:
Options

Register Now




PLEASE COMPLETE ALL REQUIRED FIELDS BELOW... THANKS!

REQUIRED FIELDS ON THIS PAGE
YOU MUST COMPLETE ALL OF THESE

Username
Password
Confirm Password
Email Address
Confirm Email Address
Random Question
Random Question #2




User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
PLEASE READ BELOW PRIOR TO ENTERING AN EMAIL ADDRESS!

ATTENTION!

YOU MUST ACTIVATE YOUR ACCOUNT!

Activation requires you reply to an email we will send you after you register... if you do not reply to this email, you will not be able to view certain areas of the forum or certain images... nor will you be able download software.

AN INVALID EMAIL ADDRESS WILL CAUSE YOUR ACCOUNT TO BE DELETED!

See our banned email list here: Banned Email List

We DO NOT respond to spamcop, boxtrapper and spamblocker emails... please add @hometheatershack DOT com to your whitelist prior to registering or you will get nowhere on your registration.


Email Address:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML is not allowed!
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

 


For the best viewing experience please update your browser to Google Chrome