subwoofer Y adapter

[coolmilo]

Originally Posted by lunchbox

I've got an ED a2-300 being built and I'm looking to pick up a y adapter. Monoprice doesn't carry any. any suggestions on a good cable?

As always, purchase a y-adapter from DH Labs (www.silversonic.com). Their products are the best bang for the buck if you want quality cables.

[Pelican170]

Originally Posted by ozzman

Yeah,That was fun.It Killed the whole day

haha yea definately. and i think after all our talks, we agreed to go by what your sub manufacturer recommends, which is what i still agree with...

[DavePS3]

Originally Posted by Opips2

Monoprice doesn't have it, I ordered by belkin.com a y adapter for my laptop or I-pod to my integrated amplifier.

I want gold premium 24k gold Y-adapter : jack phono 3.5mm male / RCA male.

NO,not need Y-adapter on subwoofer!

If your integrated Ampliflier or Receiver. this RCA sheilding 75omh white and red


If your receiver has pre output subwoofer mono


have a fun day!

Techni-Contact has it!

[primaz]

http://www.outlawaudio.com/products/cab_y_about.html

This is the description:

Unlike the majority of Y-adaptors on the market today we have taken special care to preserve your delicate audio signals. The PCA Y-adaptor is based on our superbly successful PCA cables, which utilize a twin-symmetrical ultra-pure OCC inner conductor and dual shield system. Adding to this combination is a large molded joint combiner to provide stress relief and additional isolation from the impact of the physical noise present when powerful subwoofers are in use. Virtually transparent signal quality and ease of installation for only $24.95 make this the ultimate way to send any single audio signal to two different destinations.

[nezff]

you can get a dayton audio Y adapter from parts express.
I got two for my soon to come 2 eD A2 300 subs.
I see on here there is a conflict of interest on the Y adapter. I have one right now on my Klipsch RW10d sub and YES it improves the sub dramatically. More output, and I dont think just a couple dbs. I noticed I had to turn it down alot. 4-5db down on the sub itself and 3 db down on the receiver. I can promise you that it helps to feed a mono signal into both inputs. Its not hurting anything, so why not try it. I know someone on here said that a eD tech said not to use it, but the owner or manager, Ben from eD told my on the phone that it would be a nice addititon.

[aramis109]

Originally Posted by nezff

you can get a dayton audio Y adapter from parts express.
I got two for my soon to come 2 eD A2 300 subs.
I see on here there is a conflict of interest on the Y adapter. I have one right now on my Klipsch RW10d sub and YES it improves the sub dramatically. More output, and I dont think just a couple dbs. I noticed I had to turn it down alot. 4-5db down on the sub itself and 3 db down on the receiver. I can promise you that it helps to feed a mono signal into both inputs. Its not hurting anything, so why not try it. I know someone on here said that a eD tech said not to use it, but the owner or manager, Ben from eD told my on the phone that it would be a nice addititon.

I did- quoted him too. Turns out that employee is no longer with the company, so I would go with whatever they're saying now. Personally, I agree with everything you said.

[Rob J in WNY]

I have a Polk Audio PSW125 subwoofer (see my gallery). It has both stereo L/R and single LFE input RCA jacks.

If a single cable is connected to the LFE input, the sub's onboard crossover control dial is bypassed. If you go with a Y-adapter and connect to the L/R inputs, you can use the onboard crossover control. Not sure if any of the other subs operate this way, but I can tell you that for the Polk PSW125 (and likely the Polk PSW110), this is the case.

Something to think about!

- Rob J

[Opips2]

very interesting...

weird..... I don't understand........

I know Y-adpater

Phono jack 3.5mm is earphone connector 2 striper. that's 2 red and white for left and right.

RCA Stereo red and white male to Phone jack 3.5mm male. that's called Y-adpater. you can i-pod or Laptop to receciver or amplifer.

but why use Y-adapter for a subwoofer?

How's working on RCA white to RCA Stereo red and white? not common, give power subwoofer. whatever!

[nezff]

Originally Posted by aramis109

I did- quoted him too. Turns out that employee is no longer with the company, so I would go with whatever they're saying now. Personally, I agree with everything you said.

Yeah I just talked to ben last week. thanks

Originally Posted by Opips2

very interesting...

weird..... I don't understand........

I know Y-adpater

Phono jack 3.5mm is earphone connector 2 striper. that's 2 red and white for left and right.

RCA Stereo red and white male to Phone jack 3.5mm male. that's called Y-adpater. you can i-pod or Laptop to receciver or amplifer.

but why use Y-adapter for a subwoofer?

How's working on RCA white to RCA Stereo red and white? not common, give power subwoofer. whatever!

I have no idea what you just said. I know you are from another country, but please learn some english before insulting people. For some reason you cant stand the idea of a Y adapter for a subwoofer. They actually make sub cables with left and right inputs for the sub. They have been used plenty of times before. If you dont like it, then dont comment about it. plain and simple.

[Opips2]

Originally Posted by nezff

Yeah I just talked to ben last week. thanks


I have no idea what you just said. I know you are from another country, but please learn some english before insulting people. For some reason you cant stand the idea of a Y adapter for a subwoofer. They actually make sub cables with left and right inputs for the sub. They have been used plenty of times before. If you dont like it, then dont comment about it. plain and simple.

Okay, I nake honest to tell you, I don't know about that Y-adapter for a subwoofer. if you know how to working it on a subwoofer. Good for you.
I never experinece it y-adapter with a subwoofer.

I'm begain, I want to plain and simple a subwoofer. you're expert a subwoofer with y-adapter.

Congrates!

[Big Daddy]

Originally Posted by Opips2

Okay, I never experinece it y-adapter with a subwoofer.

Using a Y adapter on most, but not all, subwoofers will increase the sound level from 3 to 6 db.

http://www.aperionaudio.com/product/...52,39,155.aspx
"Why, oh why do you need a subwoofer Y cable? Most AV receivers come with a single sub output while most powered subwoofers come equipped with left & right inputs. By using a subwoofer Y cable for both the left and right subwoofer input, you can increase the bass output of your subwoofer by about 3dB."

http://www.bettercables.com/subwoofe...ter-cable.aspx
"Attach this cable to an existing subwoofer cable to split the signal into two inputs.
Instantly improves your home theater or home audio experience.
Many subwoofers have increased clarity and bass response when both inputs are fed with a mono signal."

http://www.hdtvsupply.com/ycawi1jato2p.html
"Typically, powered subwoofers will come equipped with either a single RCA connector, or double RCA connectors. However, both connections typically only require a mono (single) connection. Therefore, if you have both right and left inputs, a single cable connected to the "left" input will probably work just fine. However, you can get anywhere from a 3dB to 10 dB gain from your subwoofer by plugging into both stereo inputs. To plug into both inputs with a single cable, simply purchase our Y adapter Cable along with your subwoofer cable."


This is the science behind it:

There are two formulas used to find the db ratio between sound levels.

The first is used ONLY FOR POWER (watts): 10 . log (P2/P1). This formula is used when comparing Sound Intensity, measured in watts.

The second is used ONLY FOR VOLTAGES (and SPL levels): 20 . log (V2/V1). This formula is for voltage relationships and Sound Pressure Levels.

Using a Y adapter will add two correlated signals. When you sum two equal correlated audio signals (i.e., mono sources from sub output on the receiver/preamp), you will get twice the signal level (A1 + A2 = 2A1, since A1=A2).

Therefore , since V2 = 2 V1 and the log (2) = 0.30103, it follows

20 . log (2V1/V1) = 20 . log (2) = 6dB gain in voltage.

For power, it will be

10. log (2P1/P1) = 10 . log (2) = 3dB increase in power.

[Opips2]

Big Daddy,

Thanks, I copy it in my mini laptop.

I understand. science and techonlogy.

[HAMP]

Originally Posted by ozzman

I use 2 Y cables one for each sub.I have used subs without them.
Really the only reason i bought them was because it was recommened for my subs.
That's it.
That's the short version,No biggy

I'm sorry, but do you have 2 Y-Splitter cables or 3?
I had to have 3

1. First one coming out of the receiver split to the left and right
2. The right side is split for the left and right on the first sub
3. The left side is split for the left and right on the second sub

Unless you have 2 pre sub out?

[Big Daddy]

Originally Posted by HAMP

I'm sorry, but do you have 2 Y-Splitter cables or 3?
I had to have 3

1. First one coming out of the receiver split to the left and right
2. The right side is split for the left and right on the first sub
3. The left side is split for the left and right on the second sub

Unless you have 2 pre sub out?

I believe Ozzman was just talking about the Y adapters at the subwoofer end. They are (2 male, 1 female). The Y adapter at the receiver end is (1 male, 2 female).

[Brain Sturgeon]

I still don't understand why you would want to do this. Although you are increasing the input signal gain, you are not increasing your sub's intrinsic ability to output sound (i.e. you're not suddenly increasing the power of your sub's amp by doing this). You can achieve the same result by simply turning up your sub's gain.

Try this little experiment if you want, although you may run into clipping problems: turn your sub's gain up as high as it will go. Then try playing bass line through it using a single single-ended cable, and then using a y-splitter and two single-ended cables. You will not find that your subwoofer performs any differently at its "maxed out" state.

This is one of the best explanations of this issue posted by an audio engineer on Audioholics a while back:

Actually, you don't realize any more power from your sub by using a "Y" connector. While you may be able to turn the gain control down somewhat, the amp in the sub still only puts out whatever it can, regardless of the level setting.

Just to clarify here, what you are actually getting on most subs by using a y-cable to feed the L/R inputs is input signal gain since each input is being summed before going to the power amp. You will actually get up to 6dB of voltage gain depending on how the summing is done (assuming no limiters or active gain control circuits are present). This can yield a 3dB increase in output level, all things being equal. However, this also brings you 6dB closer to clipping the sub preamp and 3dB closer to reaching the dynamic output limits of the subwoofer. I usually recommend using a ysplitter in the case where your preamp sub out has weak signal levels (really not the case anymore). In reality, your only upping the input level, while keeping all other things constant (IE. volume controls).

So save yourself the complexity and cash on a y-connector and just adjust your gain to where you want your bass output to be.

[HAMP]

Originally Posted by Brain Sturgeon

I still don't understand why you would want to do this. Although you are increasing the input signal gain, you are not increasing your sub's intrinsic ability to output sound (i.e. you're not suddenly increasing the power of your sub's amp by doing this). You can achieve the same result by simply turning up your sub's gain.

Try this little experiment if you want, although you may run into clipping problems: turn your sub's gain up as high as it will go. Then try playing bass line through it using a single single-ended cable, and then using a y-splitter and two single-ended cables. You will not find that your subwoofer performs any differently at its "maxed out" state.

This is one of the best explanations of this issue posted by an audio engineer on Audioholics a while back:



So save yourself the complexity and cash on a y-connector and just adjust your gain to where you want your bass output to be.

I guess I did do the retard thing, when I added my Y-splitter's I did turn the gain down abit.

It seem to have added something else besides more volume. My bass seems to be stronger.

[KayaM]

This is very insightful...The last time I bought a subwoofer the salesman tried to sell me a y-adapter. He did mention something about higher decibels but I just thought he was taking me for a ride. I never really thought about it until today. I consider this excellent timing because this coming weekend I am picking up either a Jamo Sub 300 or a KEF PSW-2500 and I'll be sure to include a Y-ad.

[nezff]

Like I said before guys, the Y adapter on the sub works. I have been using for about a week now. I think what it does is it splits the mono signal and sends it to the sub in both inputs. The has to be the reason for getting more output. I tested this a couple times with some bass going, I pulled one side of the Y adapter out and the bass subsided. With both sides in, the bass seemed stronger.

[naturephoto1]

Originally Posted by nezff

Like I said before guys, the Y adapter on the sub works. I have been using for about a week now. I think what it does is it splits the mono signal and sends it to the sub in both inputs. The has to be the reason for getting more output. I tested this a couple times with some bass going, I pulled one side of the Y adapter out and the bass subsided. With both sides in, the bass seemed stronger.

Compare or really measure the sound output with a SP meter with the Y adapter and then by adjusting the volume output louder for the subwoofer amp itself. I would be pretty sure that by increasing the volume you are getting the same sound as with the Y splitter. The Y splitter is just sending the mono bass to each of the L and R channel of the amp.

Rich

[nezff]

the sound just seems stronger. By adjusting the volume, yes Im sure it would work. But for some people like me with this sub in my 31x15 room, I had it already running at +3db which is almost all the way up, +10db being the most. When I put the Y adapter on, I had to run it at -4db and had to turn it down -3db to 0db on my receiver. Im sure the bass is just stronger. Could be too boomy for some people. Most of us cant spend an arm and a leg on highdollar subs that really dont need a Y. buy anyway