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 DIY eD A7s-650 subwoofer, Sub Completed. First Impresion.

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TSpierreye
post Jul 16 2010, 01:06 PM

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Coming 2 weeks would be very busy re-arrange all speakers, equipment and the damn heavy sub. You need 2 people to drag the sub, 3 people to carry it. Also need to DIY the speaker stand as the height for JTR T8 is around 26.5 inch. Can't find anything that is 10" for speaker stand. All 3 speakers standing vertically so this would be perfect for matching front speakers.

Will let you guys know how JTR T8 perform. Based on the rave review on avsforum, I'm expecting the performance to blow me away (well, at least blow my balls away!).
peter32
post Jul 16 2010, 04:07 PM

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Great job there ! Nice work.
jchong
post Jul 17 2010, 08:02 AM

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QUOTE(pierreye @ Jul 16 2010, 01:06 PM)
Coming 2 weeks would be very busy re-arrange all speakers, equipment and the damn heavy sub. You need 2 people to drag the sub, 3 people to carry it. Also need to DIY the speaker stand as the height for JTR T8 is around 26.5 inch. Can't find anything that is 10" for speaker stand. All 3 speakers standing vertically so this would be perfect for matching front speakers.

Will let you guys know how JTR T8 perform. Based on the rave review on avsforum, I'm expecting the performance to blow me away (well, at least blow my balls away!).
*
Will eagerly await your review on the ED and JTR. Hope can visit you next time I'm in PG.
TSpierreye
post Jul 17 2010, 10:27 AM

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We'll plan out a shootout if anyone want to haul their sub over (I think mys_terious is eager to bring his PC-13U but we need 3 strong guys to carry the sub).

I just run a test using REW in my guest room. Hitting 105db from 20hz to 100hz easily. The whole room is shaking.
jchong
post Jul 17 2010, 10:43 AM

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I recall you said your aim is to achieve ref level for your HT system. Do u actually listen at ref level?
TSpierreye
post Jul 17 2010, 11:07 AM

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My current system can't do it. When I push near 100db, the sound start to distort and uncomfortable. Based on my previous exp, loud doesn't mean uncomfortable. In my previous HT room, -15db from the receiver is the max I can tolerate. After moving into new HT room with sound treatment, -15db feel soft and need to pump the volume to -5 db to feel the kick. I'm looking forward to try out 0db with the new system. Note that ref level for dialog is around 85db, peak 105db for speaker and 115db for sub. It's not constantly 105db (I'm going to have permanent ear damage if keep on listen at 105db for few hours).

So my conclusion good music speaker doesn't mean it's going to be a great HT speaker. You need to look at the sensitivity and max power it can drive. If you hit 105db at quarter of the max rating, I believe distortion would be very low. Most audio equipment when driving past 60% of the rated max rating will have distortion shoot up exponentially.

This post has been edited by pierreye: Jul 17 2010, 11:09 AM
anfieldude
post Jul 17 2010, 11:36 AM

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QUOTE(pierreye @ Jul 17 2010, 10:27 AM)
We'll plan out a shootout if anyone want to haul their sub over (I think mys_terious is eager to bring his PC-13U but we need 3 strong guys to carry the sub).

I just run a test using REW in my guest room. Hitting 105db from 20hz to 100hz easily. The whole room is shaking.
*
Cool! How low does it go in ur room?
ronnt88
post Jul 17 2010, 12:07 PM

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i book 1 seat for myself for next audition/shootout ya icon_rolleyes.gif tongue.gif
TSpierreye
post Jul 17 2010, 01:18 PM

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QUOTE(anfieldude @ Jul 17 2010, 11:36 AM)
Cool! How low does it go in ur room?
*
I didn't test in my HT room yet. Just take a quick measurement in my guest room. Well, 11hz at 95db.
chewkl
post Jul 17 2010, 09:42 PM

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OMG 11Hz! I also want to book another seat for the shootout. Don't mind hauling any big ass sub up and down as well to secure the seat. biggrin.gif
htkaki
post Jul 18 2010, 11:19 PM

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Elite Chew, PC-U is only around 51kg to haul it. If PB-U, then it is 71kg mini-fridge size sub which will be back breaking to haul it up.

My customer in Penang, Mr Tan told me that it takes more than 10minutes for 3 adults to get the PB-U up the staircase to the 1st floor.
TSpierreye
post Jul 19 2010, 12:52 AM

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I just shift my sub from guest room across to HT room. Well, 2 people to drag the sub for less than 30 feet and it's damn tiring. Can't imagine if need to go up staircase.

My theater room is on 2nd floor, so need 25 mins (factor in extra 5 mins to take a break on 1st floor.)
mys_terious
post Jul 19 2010, 10:11 AM

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QUOTE(htkaki @ Jul 18 2010, 11:19 PM)
Elite Chew, PC-U is only around 51kg to haul it. If PB-U, then it is 71kg mini-fridge size sub which will be back breaking to haul it up.

My customer in Penang, Mr Tan told me that it takes more than 10minutes for 3 adults to get the PB-U up the staircase to the 1st floor.
*
yes pc-u13 is quite easy especially if the shipping box is still on.. 1 person can go up the stairs already...


Added on July 19, 2010, 10:14 am
QUOTE(pierreye @ Jul 19 2010, 12:52 AM)
I just shift my sub from guest room across to HT room. Well, 2 people to drag the sub for less than 30 feet and it's damn tiring. Can't imagine if need to go up staircase.

My theater room is on 2nd floor, so need 25 mins (factor in extra 5 mins to take a break on 1st floor.)
*
if the shootout jadi then every1 must bring a spare shirt.. the previous visit to your house u asked me to lift my projector.. then my computer up to the ht.. sweated like a pig.. after that had a bid of sour smell n BO through out the pj shooutout:)

This post has been edited by mys_terious: Jul 19 2010, 10:14 AM
TSpierreye
post Jul 19 2010, 10:46 AM

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QUOTE(mys_terious @ Jul 19 2010, 10:11 AM)
yes pc-u13 is quite easy especially if the shipping box is still on.. 1 person can go up the stairs already...


Added on July 19, 2010, 10:14 am

if the shootout jadi then every1 must bring a spare shirt.. the previous visit to your house u asked me to lift my projector.. then  my computer up to the ht.. sweated like a pig.. after that had a bid of sour smell n BO through out the pj shooutout:)
*
You so strong, one person to pull 50+kg up 2 floors. So, you want to bring your PC-13U over? We can only put side by side as I can't pull my sub out.
jchong
post Jul 19 2010, 12:51 PM

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Ha-ha, yeah the disadvantage of these big subs is the time and effort needed to move them. Not to mention the lesser options in placement around the room.
junchoon
post Jul 19 2010, 01:12 PM

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QUOTE(pierreye @ Jul 19 2010, 10:46 AM)
You so strong, one person to pull 50+kg up 2 floors. So, you want to bring your PC-13U over? We can only put side by side as I can't pull my sub out.
*
aiyaa, w ronnt88 around, he can lift two a7s-650 w his one BIG arm lah!

wps
ronnt88
post Jul 19 2010, 01:30 PM

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QUOTE(junchoon @ Jul 19 2010, 01:12 PM)
aiyaa, w ronnt88 around, he can lift two a7s-650 w his one BIG arm lah!

wps
*
hahaha.... sorry ler bro but my arms are reserved to carry hot chicks only tongue.gif
TSpierreye
post Jul 19 2010, 09:43 PM

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Completed MultiEQ XT calibration. Done some quick view to get an initial impression which is posted on first page. Overall, a step up from velo DD-12.
jchong
post Jul 19 2010, 11:42 PM

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Just saw your impression and pic. So your ED is behind the screen?

I'm sure it's a few steps up from the DD-12. You now have much more cone area!

Would be good to see your REW graphs for the in room response. I'm still trying to dial in the PB13, at the moment facing a dip in the 40-80 Hz region which is a bummer since a lot of mid bass impact is in that range. Haven't run MultEQ XT to see how much can be corrected.
mys_terious
post Jul 20 2010, 06:47 AM

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QUOTE(pierreye @ Jul 19 2010, 10:46 AM)
You so strong, one person to pull 50+kg up 2 floors. So, you want to bring your PC-13U over? We can only put side by side as I can't pull my sub out.
*
nola i tested for 1/2 a floor only.. it's possible to push from the bottom and let it lie down on the stairs.... i knew if i ask a friend to help i would have to answer alot of questions.. at the end i did ask my friend to help.. and i did have to answer y the sub is shaped like that, y izt so big bla bla bla

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