Home Theater Forum › Home Theater Forum › Home Theater Hardware › Speakers and Subwoofers › JLB PSW-D112 - Worth repairing?
New Posts  All Forums:Forum Nav:

JLB PSW-D112 - Worth repairing? - Page 2

post #31 of 43
2/1/10 at 7:31am
Thread Starter 
Thanks Robert.  :)
Reply
post #32 of 43
2/2/10 at 11:47am
Thread Starter 
It just came in, and it's bigger than I realized.  It also has a back on it, whereas the stock amp had its guts open inside the enclosure.   So I might have to subtract some volume from what I initially thought the enclosure would be (2.54 ft3).  I'll take measurements tonight.
Edited by Tim_Wetzel - 2/2/10 at 4:26pm
Reply
post #33 of 43
2/2/10 at 2:09pm
With a back it will allow you to stuff more fiberfil into the enclosure to make up for any lost space.  Normally you don't want the fill touching the amp's guts for fire prevention reasons.
Reply
post #34 of 43
2/2/10 at 3:36pm
Thread Starter 
How do I know how much fiberfill is appropriate?

Can you buy this stuff at places like walmart, or do I need to go to an audio place?

I took the measurements, and accounting for the thickness of the MDF the amp will only take about 0.09 ft3 out of the enclosure.  So 2.54 ft3 minus whatever the speaker takes up.
Edited by Tim_Wetzel - 2/2/10 at 4:38pm
Reply
post #35 of 43
2/2/10 at 4:33pm
Wal-Mart pillow stuffing.  I'd get two 20oz packages.  I think that will set you back $4 or $5.
Reply
post #36 of 43
2/7/10 at 8:56pm
Thread Starter 
Got it up and running.  I only used one of the 20oz packages.  Any more and I would have just been packing it in there.

I still have some work to do on tuning the new setup.  

Any idea where to start on the crossover setpoint?  My mains are Bose 601 Series III.  I tried to find specs on those but no joy.

Reply
post #37 of 43
2/8/10 at 6:04am
Let your receiver handle all of the crossover duties.  Turn the crossover knob on the sub as high as it will go.  Start high and work down with the receiver.  I think my receiver goes up to 150hz but at that level I can easily locate my sub.  I ended up with my crossover set at 80hz which is pretty much standard.
Reply
post #38 of 43
2/8/10 at 8:54am
Thread Starter 
Thanks, will try that.

What am I listening for exactly?

Oh, and can somebody point me to a "speaker balancing for dummies"?  I've been reading about balancing the subwoofer and my very modest understanding of adjusting levels is completely oversaturated.  All of this "-10db" type of stuff has me confused - I'm not sure WHAT is being set to +/-Xdb.
Edited by Tim_Wetzel - 2/8/10 at 9:43am
Reply
post #39 of 43
2/8/10 at 12:00pm
I think the +/- Db is in relation to reference level, which I think is 85Db (or whatever level you calibrated your system with).  I think most folks use 85Db, and that's pretty dang loud.  I haven't calibrated mine with a meter or anything, just the built in on my Onkyo (pre Audyssey or whatever mind you).  I happen to like my sub a bit hot though, meaning it is louder than the other speakers at any given level.
Reply
post #40 of 43
2/8/10 at 5:19pm

+ and - is in relation to an arbitrary reference point when talking about a graph.  When I say my sub is + or - 3db from 100hz to 17hz, it mean that if I set it to output 70db, and measured each frequency (17hz, 18hz, 19hz, etc) then none would be louder than 73db and none lower than 67db.  Without that the range can vary widely.  When I first built my sub, it had a "hump" in the response of almost 15db at 54hz.  So when I calibrated it to the rest of the speakers, I had a lot of mid bass and no low bass.  My EQ brought the hump in line to flatten the response.

When we talk about listening at -10db or -20db that is in relation to Dolby standards which is something like 110db peaks at listening position.  That is freaking loud.  My normal TV watching is at -25db.  Movies can get to -15db.

Calibrating is getting the output of each speaker equal.  Audyssey and MCACC are great tools and very accurate at that.

Reply
post #41 of 43
2/9/10 at 8:14am
Thread Starter 
Thanks guys so much for all the help in this thread, especially Robert. 

I had a couple buddies over that are into home theater, I asked them to critique my setup and they both agreed that it sounds fantastic given that it still needs some tweaking on the levels and considering the room in which it's installed.  :)
Reply
post #42 of 43
2/9/10 at 10:06am
Thread Starter 
Quote:
Originally Posted by Robert_J View Post


Calibrating is getting the output of each speaker equal.  Audyssey and MCACC are great tools and very accurate at that.


Robert, are these software packages or hardware?  I looked them up and I am confused, espcially with Audyssey as I see they sell a lot of very nice and very expensive equipment.
Reply
post #43 of 43
2/9/10 at 12:37pm
Audyssey is software/hardware built into a lot of receivers.  It is also available in stand alone equipment like this - http://www.svsound.com/products-parts-subeq.cfm . MCACC is a similar system used in Pioneer receivers.  I'm much more familiar with that since I run a Pioneer VSX-1014.
Reply
New Posts  All Forums:Forum Nav:
  Return Home
  Back to Forum: Speakers and Subwoofers
Home Theater Forum › Home Theater Forum › Home Theater Hardware › Speakers and Subwoofers › JLB PSW-D112 - Worth repairing?