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SVS Owners Thread V2.0, New PB and PC DSP are here!
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jchong
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 Dec 29 2010, 10:17 AM
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QUOTE(klimal @ Dec 29 2010, 09:32 AM) I changed from the traditional 2+3 seater with arm rests, in fabric, arranged in an L configuration, to a staright 10' long 5 seater in half-leather. The subwoofer was located at the top of the long arm of the L and the arm rest was blocking the output. The new set allows the subwoofer to have lot's of room to breathe and the difference is astounding. U mean previously the sub was firing directly into the arm rest, but now the sub is firing into free air? |
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jchong
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Dec 29 2010, 11:21 AM
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Oh, forgot you have PC sub.
Anyway, yours is an interesting observation. I would not have thought that the arm rest would be an issue with a down firing sub (also since you had 2' space between).
Goes to show how little things can impact sub performance. I remember one hi-fi person also told me leather sofa and fabric sofa also can make a difference for feel. Then on AVS I read how one person added bookshelves to his room and it unexpectedly improved the bass.
So much to learn about how the room, location and even furniture impact sub performance.
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jchong
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Dec 31 2010, 02:10 PM
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QUOTE(DannyOP @ Dec 31 2010, 09:37 AM) Is it placed between the corners or flat against the wall? Wondering how much difference it will make. I've already noticed better sound after setting up a dedicated av room. Even the whafedale 250 suddenly sounded it has power! And one of the corners near my door is rattling when there is more powerful bass. Will try room treatment next before I shift in the svs. Floors are normal tiles so hopefully putting in carpeting will make a difference. Your sub sounds more powerful because you now have a dedicated room. The volume of your current av room is probably smaller than the previous room, so your sub has an easier time to fill it. Yes, putting in carpet will make a difference, but probably more for mid-range and treble (for your speakers). Carpet will reduce the reflections from the tiled floor. But carpet is generally not thick enough to absorb the deep bass, hence less effect on your sub. To control the bass, you will need bass traps. |
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jchong
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Jan 2 2011, 02:04 PM
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Yeah, the branded stuff is not cheap. Furthermore, in terms of bass traps the Auralex LERND isn't that great. There are better ones from GIK and Realtraps but these are big, heavy and shipping cost from USA is very high. So in the end better to DIY those 2' x 4' x 4" panels using rockwool or equivalent. Cost including materials and labour is around RM180-200 each I believe. Another style you can do is the corner superchunk type (perfect to fit into corners). Like this:  This post has been edited by jchong: Jan 2 2011, 02:22 PM |
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jchong
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Jan 2 2011, 02:51 PM
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I checked my records and the rockwool is only ~RM45 per trap. Then have to add wood for the frames, cloth covering material and labour to assemble it all. Glad that the bass traps worked out well for u! And with the new sofa, now your bass at another level  |
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jchong
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Feb 1 2011, 12:38 AM
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QUOTE(ronaldjoe @ Feb 1 2011, 12:18 AM) It would be great if SB16U could reach bolehland at circa RM10k to RM11k.  That would be great, but judging from current pricing I think it will be closer to 13-14k. Still lets wait and see. Hopefully KEC and htkaki might surprise us |
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jchong
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Mar 21 2011, 07:38 AM
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QUOTE(DannyOP @ Mar 21 2011, 01:07 AM) hmm still wondering what a piece of foam ;ike subdude will do to help.. similar to bass trap? The purpose of Subdude is to isolate the sub from the floor so that the sub's vibrations are not transferred to the floor. In overseas countries wooden floors are quite common and the sub's vibrations can cause the floor to vibrate and this will make the bass sound more boomy, less clean. Many people on AVS say that Subdude is not necessary on concrete floors (like what we have in Malaysia) but I think Subdude can still have some effect. |
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jchong
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Mar 27 2011, 04:00 PM
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QUOTE(htkaki @ Mar 27 2011, 03:07 PM) Someone is on his way home with his second SVS sub  . In few hours time, I bet he will proudly show his dual subs to us. He also noted the improvement of LFE in my system, which is much tighter than before and also more tactile. Best is for him to describe later Will await the pics and report from the good doctor then!  Good to know you continue to push the envelope. Since it doesn't involve 4 subs, did you perhaps play around with positioning? |
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jchong
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Mar 27 2011, 09:44 PM
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QUOTE(htkaki @ Mar 27 2011, 09:39 PM) I tested US 360 in Pasadena. The result is satisfying. What's that? |
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jchong
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Mar 28 2011, 06:22 PM
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Mine also at 75dB. Not running hot.
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jchong
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Mar 28 2011, 09:13 PM
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I forgot, how much did you have to increase the sub trim in 4311 after Audyssey so that your subs are 75dB?
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jchong
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Apr 12 2011, 08:12 PM
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It becomes easier if you have something like XTZ or REW. Can do it by yourself, but yes it can be tiring and tedious. Ahh... the things we do for this hobby |
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jchong
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Apr 13 2011, 08:01 AM
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QUOTE(geforce1999 @ Apr 12 2011, 09:05 PM) No I don't have XTZ and REW. Was trying to learn from SyriuS on my last trip there but it was very late and you happend to take the XTZ back with you... I don't mind tiring but those giant subs indeed are damp heavy... for the FV15HP arrival, by moving it for 5 ft away to the corner already taking me a long time. I virtually moved the sub one inch at a time on each site until it reach the corner. Then use all my strength to lift it on the garma pad then moved further in... I can't imagine I have to do it all over the room, alone!! that's too much  Tell me about it. Imagine moving two PB13s around. My floor is carpeted, so I took out the feet and it became easier to slide (but still took quite a bit of effort to do it alone). If your floor is tiles, then can use a towel like anfieldude suggested or buy some furniture sliders to put under the sub. Makes it easier to slide. Anyway, I'm putting up my XTZ for sale. This post has been edited by jchong: Apr 13 2011, 08:03 AM |
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jchong
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May 11 2011, 07:14 PM
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Why did you pick 90hz?
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jchong
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May 12 2011, 09:22 AM
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QUOTE(DannyOP @ May 11 2011, 08:17 PM) From previous graphs 90hz turns out to be better results. Good for you. I can't use 80hz or 90hz crossover since got big dip around crossover point there.  The dip is gone if I use 60hz or 100hz crossover. |
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jchong
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May 20 2011, 01:40 PM
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Took another FR reading after playing with the tuning modes on the PB13s. This is subs + mains with Audyssey on. Crossover at 100Hz:  |
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jchong
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May 20 2011, 02:20 PM
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QUOTE(anfieldude @ May 20 2011, 02:00 PM) Looking good, how does it sound? Extension till down below 10Hz. I remember with my dual F15s I get extensions till about 5-6Hz as well but its not this flat due to my room characteristics. Since I just recently did the change, I haven't had much time to run through the usual demo scenes to see how it sounds. What to look out for in the very low Hz range (like < 10)? I know it's inaudible, so what are the cues to perceive it? Some time back I did try Black Hawk Down (Irene scene) since it's supposed to go down to 8Hz - I didn't hear anything (as expected). |
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jchong
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May 20 2011, 08:25 PM
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QUOTE(DannyOP @ May 20 2011, 07:21 PM) Looking good! What does the smoothing mean? Compared to bro htkaki's setup does it sound similar? Smoothing means the graph has been averaged. How much averaging depends on user selection, I think REW has 1/3 and 1/6 octave smoothing plus unsmoothed (same as 1/48). 1/3 and 1/6 smoothing removes a lot of detail so I always use unsmoothed or 1/48. I haven't listened to htkaki's latest setup, but I think I'm in the same ballpark as his previous one. |
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jchong
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May 20 2011, 08:28 PM
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QUOTE(ronaldjoe @ May 20 2011, 06:33 PM) Jchong, the bass seems fine. Did you miss the low end after the re-configuration? Haven't tested the really low end yet. But I suspect overall output will be more since I'm now back to both subs being ported. But tightness will be less than one ported and one sealed. |
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jchong
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May 20 2011, 09:56 PM
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Sure, let me get the system fine tuned some more first.
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