Scp53
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Posts posted by Scp53
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congrats on the speakers!
whats your budget for this sub? is diy an option? is it for music it only or also some movies? answering these questions would allow us to better help you.
scp53
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i would recommend looking at the new amps from pe. they are digital bash amps and cost 150 for the 300watt and 240 for the 500watt. you also may want to consider the quatro subwoofers from pe. i have heard many good things about them on the pe forum. just a thought.
here is a pic of my atlas 15in diy subwoofer. very potent and clean. the biggest problem is its size and weight- 120+lbs and 24in cube. im sure your will look much better with a veneer. well, i gotta go!
cheers, scp53
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not sure what amp your were looking at but partsexpress.com now offers a 300watt and 500 watt bash amp for $150-300wt and $240 for the other. seems to be a good amp for the money. just a thought...
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I'd recommend the atlas 15(well actually, whatever replacement ascendant audio makes) from ascendant audio(although the others are good options too). i have it in a 24in cube with a 500 watt plate amp tuned to 20hz or so. i can get 115-118dB peaks in room clean at 2m away. imo its very tight and musical. a few highlights are it has an xbl motor(lowers distortion), adjustable q with the coils, and its BOTTOMLESS. this is just my two cents(and of course my biased opinion)...
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how high off x over are you turning it to? imo that sub sounds best at 80hz x over or lower depending on the main speakers. what kind of placement do you have for it? that can make a huge impact on the sound. have you used test tones/test disk and spl meter to place it right? if you dont have that stuff you can place the sub in your listening position, play some bass heavy material, then walk around the room to find where it sounds best. then put the sub there.
btw, i have personally heard it numerous times in store and it is very tight and punchy. you maybe asking for too much out of it. remember, its still just a 12in driver with a pr radiator. or you may be used to boomy subs that are "one note wonders". this one is NOT one notey.
scp53
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where do you buy that? thanks, scp53
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fyi, NOTHING had to be repaired. i was just trying to quiet it down a little. the thing works perfectly fine, just a little more noise. no big deal. turns at the normal speed,etc.
scp53
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did it get broke by the shipper or buyer?
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so i went to good will today and i found a prize. its a denon dcm-440 5 cd player. works very well and has no scratches.
the ONLY thing that is not working the best is the motor drive to rotate the disk plate thing. i tore it all apart and just seems that these 2 gears like to make noise. i lubed them because there wasnt much left on them. seemed to help a little. without the cd plate on the drive thinger the noise is a lot less. seems that the slight gear noise resonates the big 5 disk plate and makes it noisier. but from what i saw nothing is going to break. ill just live with the noise. no biggie. but what is this
the only question i have about it is what is 20bit 8 times over sampling digital filter? i understand kinda what its doing. and it has some double super linear converter on it too. not sure what that does,etc. it also has pcm digital output on it. can i use any decent rca cabling? or i need a specific rca type connect? thanks for any comments on this player's quality and help with my questions. cheers, scp53
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for ht bass testing i like to use the incredibles! there is some SERIOUSLY low bass in that movie. do you get good bass in that movie? what sub do you have?
scp53
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i have been using the fast response on the meter. I'll change and go to the slow as suggested(btw, i have been using the c weighting). thanks. any other comments or suggestions?
scp53
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do you look at that average number readout for the las second of measuring? or do you look at the bar moving at the bottom that moves quicker?which is more accurate or more meaningful? i wonder if i havent been measuring the "dynamic" peaks of the music but instead measuring the "average" spl or what ever. im talking about the digital one. tell me what ya think. thanks
scp53
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thats the strangest thing I've ever seen on ebay.....
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as far as power rating, Chad told me some time ago that there higher than whats in the specs(i think 600 or so. about what you guessed). so, does the amp clipping from cd noise make ANY sense? seriously, that must have been whats happening. in terms of the spl you said, ya thats about what it does. btw, i never said(now that the amps modded) that this thing cant put out with 250 watts. i would say at 2m i can hit 110 clean and a lot of content. thats with the sub semi corner loaded(is there such a thing) and me near the opposite wall. and as for sine waves, i plan to run none. id rather no take the chance of heating the **** out of the coil. so what would YOU suggest i do? a new amp? do you think that new amps steeper x over will help clean things up? to me, that could be taking away a sizable amount of power. pe offers 45 day money back satisfaction. your help is greatly appreciate. scp53
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i talked to chad today(didnt order a amp yet btw. i might wait?) and he said the only thing better then my amp would be the 500 from pe. he said i could wire it in series(has one big and one smaller coil fyi) and that would raise the motor bl from 12 to 15. we said he can here a sq difference with the stronger motor. he also said this would give me the most spl. any comments?
btw, no one has really told me how to test the system for a short or anything like that(although from what ive tested, there are none). thanks,
scp53
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well first off, i took the amp back. i decided its too much for me right now.
so you dont think that there could be real deep stuff(unwanted noise) on a cd or dvd? is that manuel full of crap? i think im gonna try the 500 from pe. that has a steeper x over(24db vs my 12db on the 250watt), soft clip, obviously more power, and parametric eq. what do you think? (or should i check for a short? btw, the wire i was running for the pro amp is the same i use for my mains and they work just fine.)
thanks, scp53
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that looks REALLY NICE!!
are those rf7s or rf5s up front? look like 5s to me. regardless, its nice either wayscp53
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ok, first off i NEVER played a movie with the filter off. that was ONLY for a few songs.
i read the manuel and it says quote,
"Input filter-
WHAT IT IS
The low-frequency (LF) filter rolls off
signals below either 30 Hz or 50 Hz.
This improves bass performance by
limiting sub-audio cone motion,
making more power available for the
speakers' rated frequency range.
The filter settings for each channel are
controlled individually through the DIP
switch settings shown. When the filter
is turned off, a 5 Hz roll off protects
against DC or deep sub-audio inputs.
WHEN TO USE IT (OR NOT)
As a rule, your speakers will sound
better with proper filtering. Unless
you already have filtering in a
preceding device, match the setting
to the low frequency rating of your
speakers. Vented (bass reflex,
ported, etc.) speakers are especially
sensitive to cone over-excursion at
frequencies below their rated limit.
The 50 Hz filter works well with
most compact full-range speakers,
and has a slight boost at 100 Hz for
greater fullness. The 30 Hz filter is
intended for subwoofers and large
full-range cabinets. The "off"
position should be used only for
applications such as studio playback
monitoring, where you need to know
if there are unwanted sub-audio
signals present in your mix."
does that explain it at all? basically this amp has NO rolloff on the low end(no rumble filter). NONE. my 250wt plate amp has an f3 at 19hz with no boost or any eq. so you can see that the roll off between these two amps is pretty different. this is why it was clipping. btw, my wires are fine. i have checked them.
so, does this make any more sense? if i had a eq before the amp other than the receiver it would work. i would need to roll it at around 15-20hz i think. let me know what you think. thanks
scp53
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Amdek, how do those crowns sound on your system? are they clean enough,etc? just curious...
scp53
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whats weird? the clipping with out the filter or with it? it makes perfect sense to me why it does it with out it. It says even the manuel there will be problems with out a roll off on the low end. it says with out a filter the roll off is at 5hz. I found i had a few switches wrong and now i got them fixed. as for clipping because of other equipment, i dunno? i have two different dvd players(both toshiba- sd4900 cheapo and a sd2715 which is a decent player for its time). both of those give me the same result. and i have had two different receivers used with the 250watt sub amp on the subs. a pioneer tube and the yamaha. i connected both with speaker level input and also the yamaha has been connected via lfe out. all connections yield the same result- amp clipping. oh yea, i have hooked it up to the pc too and i again get the same result(though havent done it with the mod yet).
however, this clipping is not near as much any more because i have modded the amp to be "flat"(not sure if you knew that).
btw, I need a amp anyways to drive my other sub. so i need to get one for sure . i was considering the 500watt plate amp from pe but thought i want something more long lasting and more useful(ie- drive mains or another sub). so to do that a pro receiver is pretty much the cheapest choice. and since im doing this ONCE, im getting a better make, so thats why i went with qsc over behringer and others. for sub use any decent pa amp would have done but i wanted to drive other things later on. ok, enough of my rambling on here.sorry it got so long. just tell me what ya all think of this. thanks
scp53
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well the amp is REALLY nice. i watched mostly ht and was impressed. now i can go by a meter on the side to see if its clipping or not. for ht it never does at all. the ONLY problem i have is with the filter on it. you can have it roll 3db down by 50hz or 3 db down by 30 or no filter at all. I found that with no filter there is really really really subsonic stuff that clips the crap out of the amp(like cd "noise"- 5hz stuff). i would hardly have my music up to 80 db and id get a load of cone movement with the clip light on steady. i set the switches so the filter is at 30hz now. that fixed the problem.
btw, i read in the manuel and it says to use a filter unless you have a filter(receiver obviously doesnt slope off much until reall really really deep stuff) before it or you are playing low level studio mixing to check for noise.
so anyways ht is very good(ill play more movies tomorrow) but for shania twain greatest hits cd i still get clipping
. i think that mix is burned "hot" or something. seriously, the cd must be burned hot if i have a 30 hz filter on a 1400 watt 4 ohm amp(bridged) and i still clip it. however, this sounded much much better than when i had the 250 on it(and i know that was clipping too). in fact with slight clipping its hardly noticable on this new amp(because im not clipping it nearly as hard. ) the only thing i could think of is i switched it wrong? ill have to check it again. peace out .scp53
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well the amp is REALLY nice. i watched mostly ht and was impressed. now i can go by a meter on the side to see if its clipping or not. for ht it never does at all. the ONLY problem i have is with the filter on it. you can have it roll 3db down by 50hz or 3 db down by 30 or no filter at all. I found that with no filter there is really really really subsonic stuff that clips the crap out of the amp(like cd "noise"- 5hz stuff). i would hardly have my music up to 80 db and id get a load of cone movement with the clip light on steady. i set the switches so the filter is at 30hz now. that fixed the problem.
btw, i read in the manuel and it says to use a filter unless you have a filter(receiver obviously doesnt slope off much until reall really really deep stuff) before it or you are playing low level studio mixing to check for noise.
so anyways ht is very good(ill play more movies tomorrow) but for shania twain greatest hits cd i still get clipping
. i think that mix is burned "hot" or something. seriously, the cd must be burned hot if i have a 30 hz filter on a 1400 watt 4 ohm amp(bridged) and i still clip it. however, this sounded much much better than when i had the 250 on it(and i know that was clipping too). in fact with slight clipping its hardly noticable on this new amp(because im not clipping it nearly as hard. ) the only thing i could think of is i switched it wrong? ill have to check it again. peace out .scp53
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Well i just borrowed the rmx 1450 new from a shop. I'll have it hooked up in a bit and post back tonight. cheers, scp53
. i think that mix is burned "hot" or something. seriously, the cd must be burned hot if i have a 30 hz filter on a 1400 watt 4 ohm amp(bridged) and i still clip it. however, this sounded much much better than when i had the 250 on it(and i know that was clipping too). in fact with slight clipping its hardly noticable on this new amp(because im not clipping it nearly as hard. ) the only thing i could think of is i switched it wrong? ill have to check it again. peace out .
SPL Meter observation
in Technical/Restorations
Posted
I have found that "hidden" peaks in music and ht can only be seen if
the meter is set to "max". not sure if the old analog one has that
function or if its just on the new rs digital ones.my meter might be
reading around 100db for the avg per second reading but put it on max
and it hits 110db plus. not sure if that helps...
scp53