Reply
 
LinkBack Thread Tools Display Modes
Old 05-22-2011   #1
 
DIYMA freshman
Join Date: Oct 2009
Location: peoria il
Posts: 29

Rep Power: 63 amkarlix will become famous soon enoughamkarlix will become famous soon enoughamkarlix will become famous soon enoughamkarlix will become famous soon enoughamkarlix will become famous soon enoughamkarlix will become famous soon enough


iTrader: (0)



Default Help building box for 2 Polk MM1040

I would like a little bit of help from the people here that are more experienced than myself. I built a box for 2 Polk MM1040 subs a month or so ago. I followed the recommendations on Polks website for the box dimensions, but am not happy with the results. I think the box is too small. I plugged the dimensions into the box calc on the RE website, and the volume turns out to be slightly less than what Polk recommends, not even accounting for displacement. The subs sound really good on some songs, but seem to lack range and have kind of a boomy sound. I was wondering if someone here had experience with these subs in ported enclosures, or could tell me what size enclosure might be more appropriate for the subs. Thanks in advance for any help.

Aaron
amkarlix is offline   Reply With Quote
Old 05-23-2011   #2
DIYMA 500 Club
 
96jimmyslt's Avatar
 
DIYMA Enthusiast
Join Date: Jan 2011
Location: East bay, CA
Age: 28
Posts: 1,042

Rep Power: 62 96jimmyslt is a jewel in the rough96jimmyslt is a jewel in the rough96jimmyslt is a jewel in the rough96jimmyslt is a jewel in the rough96jimmyslt is a jewel in the rough96jimmyslt is a jewel in the rough96jimmyslt is a jewel in the rough96jimmyslt is a jewel in the rough96jimmyslt is a jewel in the rough96jimmyslt is a jewel in the rough96jimmyslt is a jewel in the rough


iTrader: (0)



Default Re: Help building box for 2 Polk MM1040

What is your amp?

Does it have a subsonic filter? It might be too high. The low pass filter might also be too low.

Have you tried test tones? 20-100Hz should be perfect for finding the peak frequency of the box.

If you have an ipod touch or iphone, get "tone; the ultimate tone generator" or "audiotest" or "oscillator lite" or "tono"

OR just make the tones yourself in audacity or google search for test tones

The sub itself is only 10", and 350w rms. That's hardly going to shake the Car even at peak box placement.

If the box is too small, try inverting the subwoofer(s) or adding polyfil or both!

by inverting the subs, you get more volume inside since the sub is not taking up that room anymore.

How hard do the subs actually hit?

why don't you Build a box that is exactly to spec that the subs require (width, length, etc) and judge for yourself if those are even capable of what you expect them to do.

Also might be the way you have them wired.

Are they both on 350w rms @ 4 ohms from a dual channel amp that does at least 350w rms per channel?

Or in parallel presenting a 2 ohm load to the amp that has 700w rms @ 2 ohms?

Lots of things to think about here.

Pictures would be nice too.

2010 chevy HHR LT - dnx 6160 - Alpine MRP-M500 - JL 12w3v3-4 - sony xm 4045
96jimmyslt is offline   Reply With Quote
Old 05-24-2011   #3
 
DIYMA freshman
Join Date: Oct 2009
Location: peoria il
Posts: 29

Rep Power: 63 amkarlix will become famous soon enoughamkarlix will become famous soon enoughamkarlix will become famous soon enoughamkarlix will become famous soon enoughamkarlix will become famous soon enoughamkarlix will become famous soon enough


iTrader: (0)



Default Re: Help building box for 2 Polk MM1040



The box that they are in is built exactly to the specs that polk recommends for them. They are powered by a cadence zrs7000d wired at 2 ohm, which provides more than enough power. I will check the settings on the amp, and adjust the subsonic filter and see if that makes any difference. I'm not complaining about the output of the subs, just how they sound with a lot of music.
amkarlix is offline   Reply With Quote
Reply

Bookmarks


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not 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 code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


» Amps
A/d/s/
Advent
Alphasonik
Alpine
American Bass
ARC Audio
Atomic
Audio Art
Audio Gods
Audiobahn
Audiocontrol
Audiopipe
Audison
Aura
Autotek
Avionixx
Bazooka
Beyma
Blaupunkt
Boss
Boston Acoustics
Bravox
Cadence
Cascade (CAE)
CDT Audio
Cerwin Vega
Clarion
Clif Designs
Concept
Coustic
Critical Mass
Crossfire
Crunch
DB Drive
DC Audio
DC Power
DEI
Denon
Diabolo
Diamond
Digital Designs
Directed
DLS
Dual
DYnamat
Dynaudio
Earthquake
Eclipse
Elemental Designs
ESX
Eton
Farenheit
Fi Car Audio
Focal
Fusion
Genesis
Ground Zero
Hafler
Helix
Hertz
Hifonics
Hushmat
Image Dynamics
Infinity
Interfire
JBL
Jensen
JL Audio
JVC
Kenwood
Kicker
Knu Konceptz
Kole Audio
Kove Audio
Lanzar
Lightning Audio
Linear Power
MA Audio
Magnat
Marantz
Massive Audio
MB Quart
McIntosh
Memphis
Metra
Milbert
MMATS
Mobile Authority
Morel
MTX
Nakamichi
Niche Audio
O2 Audio
Ohio Generator
Optima
Orion
Oxygen Audio
OZ Audio
PG Audio
Phase Linear
Phoenix Gold
Pioneer
Polk
Power Acoustik
Powerbass
Powermaster
Precision Power
Profile
Pyle
Pyramid
RadioShack
Rainbow
Rampage
RE AUdio
Rockford Fosgate
Scanspeak
Scosche
Seas
Sony
soundstream
Sparkomatic
SPL Dynamics
Stinger
Sundown Audio
Swiss Audio
Targa
TC Sounds
TREO Engineering
TRU
Tsunami
Ultimate
US Acoustics
US Amps
Velodyne
Vifa
Viper
Visonik
Xtant
Zapco
Zed Audio
Powered by vBadvanced CMPS v3.2.3

All times are GMT -6. The time now is 11:24 AM.


Powered by vBulletin®
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Search Engine Optimization by vBSEO 3.6.0
Powered by vBadvanced CMPS v3.2.3

Ad Management by RedTyger

Meet Our Team | Forum | Privacy and Rules | Advertise | Archive | Search | Contact Us

Home | User CP | Members List | New Posts | ITrader | Faq | Post Spy