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How to produce a mono signal?

Posted: Sun Jun 08, 2008 6:49 am
by KHPower
I have been working with my sub and amp on this Phorum and now I guess I need a MONO sigal coming from the BassCube to use both channels on my amp to one 15'' Immortal.
I am not really sure what I would do :( If I had to guess i would plug a Y adapter (PG ofcourse) into the input channel of my amp leaving the female end exposed. I would then take the out put RCA's on the Basscube and plug them into a double female to male y adapter andd then connect the two y adapters correct?

Or would I just use 1 rca from the cube and plug it to the y adapter on the amp

Thanks!

Posted: Sun Jun 08, 2008 10:47 am
by flogger11
What are you using for a crossover? You should already have a mono signal from your crossover, so just run an rca from your cube to your amp and dont worry about it...

Posted: Sun Jun 08, 2008 11:01 am
by KHPower
flogger11 wrote:What are you using for a crossover? You should already have a mono signal from your crossover, so just run an rca from your cube to your amp and dont worry about it...
I am not using a crossover , I am just using the PG Basscube and then my amp is set to full range (no crossover)

I thought the Basscube reproduced the stero signal ? Does the Basscube take the signal from my head unit and change it to mono?

If I hook up my rca's and a bass note hits on the right channell and not the left my sub would be toast.

The amp has to have the exact same signal at all times on both rca channels

Posted: Sun Jun 08, 2008 1:41 pm
by smgreen20
KHPower wrote:
flogger11 wrote:What are you using for a crossover? You should already have a mono signal from your crossover, so just run an rca from your cube to your amp and dont worry about it...
I am not using a crossover , I am just using the PG Basscube and then my amp is set to full range (no crossover)

I thought the Basscube reproduced the stero signal ? Does the Basscube take the signal from my head unit and change it to mono?

If I hook up my rca's and a bass note hits on the right channell and not the left my sub would be toast.

The amp has to have the exact same signal at all times on both rca channels
If you're not using a crossover then why do you still need a mono signal? When you bridge an amp it automatically monos the signal.

If I read it right, your sub is playing full range- that might be where your issues are at.

The basscube does stereo, it does not combine the signal to mono.

Why does the amp have to have the same exact signal at all times???? Seperate gains per ch?

Posted: Sun Jun 08, 2008 2:06 pm
by KHPower
smgreen20 wrote:
KHPower wrote:
flogger11 wrote:What are you using for a crossover? You should already have a mono signal from your crossover, so just run an rca from your cube to your amp and dont worry about it...
I am not using a crossover , I am just using the PG Basscube and then my amp is set to full range (no crossover)

I thought the Basscube reproduced the stero signal ? Does the Basscube take the signal from my head unit and change it to mono?

If I hook up my rca's and a bass note hits on the right channell and not the left my sub would be toast.

The amp has to have the exact same signal at all times on both rca channels
If you're not using a crossover then why do you still need a mono signal? When you bridge an amp it automatically monos the signal.

If I read it right, your sub is playing full range- that might be where your issues are at.

The basscube does stereo, it does not combine the signal to mono.

Why does the amp have to have the same exact signal at all times???? Seperate gains per ch?
I made a thread about wiring to .5 ohm load , you will have to read it. Basicly I am running 1 sub off of a 2 channel amp using both channels for the woofer so I can reach the amps max power. Its a quad 2 ohm sub and the only way to achive the best power is to parallel 2 sets of coils to 1 ohm and thus using both channels on the amp to do so. To obtain a 1 ohm load per channel , so thats why I need a mono signal

And the reason I have the amp at full range is because I have the Basscube. The amp only has 3 crossover settings low , high and full and I didnt want the amps lowpass to mess up the bass signal from the Basscube . I was told the Full setting iS No crossover ,

Posted: Sun Jun 08, 2008 2:24 pm
by KHPower
His is where the thread is loacated that helped me to wire my sub in this configuration. I need a mono signal to go to the amp.
http://phoenixphorum.com/i-need-a-rough ... t6289.html

Posted: Sun Jun 08, 2008 2:33 pm
by flogger11
I just browsed the specs and I dont believe the bass cube has a crossover, that could be a large part of your problem. I would have to believe the bass cube sends a summed mono signal, so make sure you turn on the low pass cross over on your amp. Make sure you cross your subs at 63-70 hz depending on your crossovers rolloff, have any bass boost on the amp turned to flat, the sensitivity wide open and once again make sure you have your head units sound settings. I would love to offer more guidelines, but I have never owned an amp like yours...

Posted: Sun Jun 08, 2008 2:43 pm
by Bfowler
[quote="flogger11"]I just browsed the specs and I dont believe the bass cube has a crossover, that could be a large part of your problem. I would have to believe the bass cube sends a summed mono signal,

yes and yes

Posted: Sun Jun 08, 2008 2:44 pm
by KHPower
I was wondering about that . i will be sure to flip it to lowpass because it should still allow the basscube signal to pass through un interupted.

Here is a Q and A from Audiobahn and why I need a Mono signal except my sub is a quad voice coil

Q: Is it ok to run the voice coils of a DVC (Dual Voice Coil) sub to different channels of an amp?

A: It is acceptable to run the coils off of different channels of an amp. You will need to make sure that you are receiving a mono signal to both inputs on the amplifier; otherwise the sub will be trying to play 2 different signals. This can eventually lead to permanent damage.

Posted: Sun Jun 08, 2008 4:37 pm
by Jacampb2
Simple solution, use a y adapter and just one RCA pick either left or right. It makes very little difference, bass is not very directional, so even if it was recorded in stereo, it is difficult to reproduce as such.

I think most decent head units made in the last 7-8 years with pre-amp outputs have a subwoofer output that was already summed mono. Check your decks owners manual.

Otherwise, if you want to add a bunch of interconnects, you can do exactly what you said w/ two y adapters.

Later,
Jason

Posted: Sun Jun 08, 2008 5:50 pm
by flogger11
No need for any y cables as your bass cube is sending a summed mono signal if your head unit isnt...

Posted: Sun Jun 08, 2008 6:12 pm
by KHPower
My head units a older Pioneer DEh-p3500 and my amp is on the sub-out of the deck so I guess I will just leave everything be for now. Plus its going to the Basscube.

What exactly is "Summed" mono? I know what mono is but not what "Summed" means

Posted: Sun Jun 08, 2008 6:20 pm
by flogger11
Left stereo merged with right stereo... summed mono.

Posted: Sun Jun 08, 2008 6:46 pm
by KHPower
flogger11 wrote:Left stereo merged with right stereo... summed mono.
Thanks ! although I did not see anything that said summed mono and the deck is around 5 years old I think I should be good. When I had two 12''s installed about a month ago I didnt notice and channel seperation when I was tuning it.

Thanks agian !

I think I may just ask all my questions on this Phorum for now on :wink:

Posted: Sun Jun 08, 2008 8:23 pm
by Wakeup
Ya be careful sending different signals to each voice coil. I definitely learned the hard way....wasnt my fault....the people who hooked up my sub in the box did not wire BOTH COILS.....they only hooked up one.....and especially for a subwoofer, you dont want to do that.

It was an XXX 12" 2006. It cost me a $500+ Sub to learn to do my own checking. I just assumed they knew what they were doing....boy was I wrong. Blew my voice coil....sub is failed...

Posted: Mon Jun 09, 2008 5:29 am
by KHPower
Wakeup wrote:Ya be careful sending different signals to each voice coil. I definitely learned the hard way....wasnt my fault....the people who hooked up my sub in the box did not wire BOTH COILS.....they only hooked up one.....and especially for a subwoofer, you dont want to do that.

It was an XXX 12" 2006. It cost me a $500+ Sub to learn to do my own checking. I just assumed they knew what they were doing....boy was I wrong. Blew my voice coil....sub is failed...
Man , sorry to hear about that. Was this a shop that did this ? or did you have some friends hook it up for you? Did you notice that sub sounded different?
When I was bench testing the sub after I wired down to .5 ohms I took a DMM and made sure it was reading .5 ohms . Now after I rewire both sets of coils I will have to make sure each is 1 ohm.

Posted: Mon Jun 09, 2008 6:13 am
by flogger11
KHPower wrote:
flogger11 wrote:Left stereo merged with right stereo... summed mono.
Thanks ! although I did not see anything that said summed mono and the deck is around 5 years old I think I should be good. When I had two 12''s installed about a month ago I didnt notice and channel seperation when I was tuning it.

Thanks agian !

I think I may just ask all my questions on this Phorum for now on :wink:
Ok, how would you like to end all your searching for "more" or "better" bass? No joke, do the following and you will never want for quality, musical, loud deep bass again! Buy (2) Treo TSX44 dvc 12", install them in two 1.2 cu ft sealed enclosures and then use your ZX-500, one sub on each channel, thus a 2 ohm load each side. I AM NOT KIDDING HERE. All your problems will end, these subs are that flippn' good! You should be able to get the subs new off ebay in the neighborhood of $170 each shipped, the proper box also from ebay runs $50 delivered (3/4" MDF, single box w/ two seperate 1.2 cu ft sealed chambers). Thats less than $400 invested in subs and they will BLOW AWAY your other sub, even w/ 1600 watts on it! NO JOKE! I would be willing to bet you will be selling your other sub and amp the day after you hook up the Treo's! Take a chance, you will never go to another sub, guarenteed!

Posted: Mon Jun 09, 2008 6:24 am
by KHPower
flogger11 wrote:
KHPower wrote:
flogger11 wrote:Left stereo merged with right stereo... summed mono.
Thanks ! although I did not see anything that said summed mono and the deck is around 5 years old I think I should be good. When I had two 12''s installed about a month ago I didnt notice and channel seperation when I was tuning it.

Thanks agian !

I think I may just ask all my questions on this Phorum for now on :wink:
Ok, how would you like to end all your searching for "more" or "better" bass? No joke, do the following and you will never want for quality, musical, loud deep bass again! Buy (2) Treo TSX44 dvc 12", install them in two 1.2 cu ft sealed enclosures and then use your ZX-500, one sub on each channel, thus a 2 ohm load each side. I AM NOT KIDDING HERE. All your problems will end, these subs are that flippn' good! You should be able to get the subs new off ebay in the neighborhood of $170 each shipped, the proper box also from ebay runs $50 delivered (3/4" MDF, single box w/ two seperate 1.2 cu ft sealed chambers). Thats less than $400 invested in subs and they will BLOW AWAY your other sub, even w/ 1600 watts on it! NO JOKE! I would be willing to bet you will be selling your other sub and amp the day after you hook up the Treo's! Take a chance, you will never go to another sub, guarenteed!
Whoa Brother! :lol: i will sure check them out but I am a 15'' kinda guy. I just like the Bass resonse of a 15'' , so I might need to take a look at the 15'' Treos. But first i am going to play around witht he 15'' Immortal and then I will explore other subs. Like I said in another post somewhere , that I did have the ZX500 pushin another Audiobahn 15 and it sounded sooooo good and it pounded!

I am more of a SPL guy as well but do appreciate sound quality. I take the interstate home from work (its a good shortcut) and it alows me to truly turn it up without any worries and allows my alternator to produce its highest power , Im not the kind of fella that sits and pounds at stop lights :wink: but do appreciate a sound back massage on the way home :D

Posted: Mon Jun 09, 2008 6:26 am
by flogger11
A pair of 12" Treos will smoke any single 15", just as low and loud but quicker response, they are that good dude!

Posted: Mon Jun 09, 2008 6:43 am
by KHPower
What kind of numbers can they hit? And can ya do ported with those? I appreciate the sound of sealed but that sounds like a really small box.

Posted: Mon Jun 09, 2008 6:50 am
by KHPower
I checked out there site and they look like great woofers , the power handling is a little weak and its not like that matters if they are quality but I dont see my eyes crossing and a cigarette kighter blowing out with those j/k

I will do more research on them. It just seems like I have had alot a fellas recommending different subs , PowerBass , Soundstream ect...

Posted: Mon Jun 09, 2008 6:52 am
by flogger11
Thats what will happen, ONE in my car tickles the asshole and screws w/ your insides, I couldnt imagen TWO with the mighty ZX-500 on them!

Posted: Mon Jun 09, 2008 7:02 am
by flogger11
KHPower wrote:I checked out there site and they look like great woofers , the power handling is a little weak and its not like that matters if they are quality but I dont see my eyes crossing and a cigarette kighter blowing out with those j/k

I will do more research on them. It just seems like I have had alot a fellas recommending different subs , PowerBass , Soundstream ect...
FYI how loud a speaker goes is very much affected by the speakers sensitivity, how much power it takes to reach a certain volume. You can throw 400 watts on a 400 watt woofer and it will be nearly as loud as a 800 watt woofer w/ 800 watts on it, it just takes less power to get there. Dude, I hope you trust me on the Treo, screw what everybody else is saying. I have had a dozen subs in my vehicle and demo'd dozens more, HANDS DOWN these are the best subs I have ever encountered! Tell you what, you take the chance on a pair of treos and you dont like them, I will make sure to help you sell them and you wont lose very much if you buy them off ebay, but I know you will never get rid of them, trust me. And yes, you can put them in a ported box for even more spl!

Posted: Mon Jun 09, 2008 7:32 am
by KHPower
Well if ya pu tit that way LOL

The sensitivity in a Immortal 15 is 97 . Tehre is a guy claiming he popped one of these in 6 cf ported box tuned to around 40hz and I guess was hitting 153.5 ? I guess I will play with them for a while and I can always sell the thing and move on.

Posted: Mon Jun 09, 2008 11:24 am
by smgreen20
KHPower wrote:What kind of numbers can they hit? And can ya do ported with those? I appreciate the sound of sealed but that sounds like a really small box.
A guy I know that has two 15" SSX w/1500 wrms to each in a Durango was hitting somewhere around 158 dB. What it was tuned to I don't recall. If memory serves me, it was around 39Hz.

My 12"SSi is getting 900 wrms in a 2.75 CF tuned to 37Hz in a 2000 GMC Sierra ext cab and on a TL I hit 138.8 dB. My set up was more of an SQL. My next one is strictly SQ.