| Author |
Thread: Got a new amp! |
    
Silver Member Username: Ducka
Shelby Township,
MI
United States
Post Number: 320
Registered: Jan-08
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| Posted on Monday, July 14, 2008 - 02:12 pm: |
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HEy guys, I recently picked up the new Hifonics Bxi 1208D for 2.35 hundred dollars lol and that was after tax. SO I was very happy with the price since it is going for 250 at onlinecarstereo.
I got some questions about it though.
First the gain. When subwoofertools was up they had a calculator for setting gain. Does anyone know of another site that has a similar calculator. I just set the gain by ear, but that method kinda sucks because it is pretty tough to find out when the subs start clipping when it is as loud as it is.
second question is about the phase knob. This is the first Amp I have owned with one of these and im not sure what to do about it... I just kinda set it in the middle. any suggestions?
and my last question is with the bass eq. I just left it at zero and turned the gain up enough to where it was not clipping. Should I do something different about that?
Thanks,
Kevin |
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Silver Member Username: Qslimms
Swanton,
Oh
Usa
Post Number: 164
Registered: Mar-06
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| Posted on Monday, July 14, 2008 - 03:27 pm: |
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http://www.fullsizechevy.com/forums/general-discussion/audio-video-electronics/1 65526-amplifier-gain-setting-tutorial.html
i asked the same ? the other day check that out it helped me. |
Bronze Member Username: Neptune07
Grand Junction/Golden,
CO
Post Number: 71
Registered: Jun-08
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| Posted on Monday, July 14, 2008 - 04:06 pm: |
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i have the Bxi 1206D (so the 2006 version) and i have the gain about 3/4 of the way up, phase at 0, and bass EQ a little over half way. on my deck i set bass to +1 and Subwoofer level to +1 and i haven't had any problems with the amp/subs except for overheating a few times during mid summer |
Gold Member Username: Nd4spd18
Northwest PA
Post Number: 7923
Registered: Jul-06
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| Posted on Monday, July 14, 2008 - 04:25 pm: |
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You could have got an Audioque 1200d for $250 better amp.......
Bass EQ in other words bass boost needs to be off unless you like clipping. |
Silver Member Username: Mmaudioconcepts
Post Number: 527
Registered: Jan-07
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| Posted on Monday, July 14, 2008 - 04:35 pm: |
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the phase should be left alone unless your subs are out of phase( wired backwards or receiving a different signal) set the phase to 0 or off. if the subs suck in then put it on 180. |
Bronze Member Username: Neptune07
Grand Junction/Golden,
CO
Post Number: 72
Registered: Jun-08
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| Posted on Monday, July 14, 2008 - 04:38 pm: |
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so M.S., are you saying that it would be better on my subs if i set the bass boost to 0 and turned the gain up closer to .2 volts? |
Silver Member Username: Ducka
Shelby Township,
MI
United States
Post Number: 321
Registered: Jan-08
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| Posted on Tuesday, July 15, 2008 - 07:54 pm: |
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M.S.: i would have gotten the Audioque except I would rather not order stuff from online its alot easier for me to just go out and buy from a store... Mostly cuz i still live with my parents and I dont own a credit card or paypal account.
B00M3R: What kind of subs do you have? |
Gold Member Username: Jakeyplaysbass
St. Louis,
MO / ASU
Post Number: 3116
Registered: Jul-05
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| Posted on Tuesday, July 15, 2008 - 08:25 pm: |
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"i have the Bxi 1206D (so the 2006 version) and i have the gain about 3/4 of the way up, phase at 0, and bass EQ a little over half way. on my deck i set bass to +1 and Subwoofer level to +1 and i haven't had any problems with the amp/subs except for overheating a few times during mid summer"
Your subs hate you. Bass boost should be 0, the gain also seems high to me...did you set it with a DMM or just randomly set it there? |
Gold Member Username: Nd4spd18
Northwest PA
Post Number: 7927
Registered: Jul-06
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| Posted on Tuesday, July 15, 2008 - 10:09 pm: |
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Yeah, set gains right..... somebody should have a link to a calculator.
And no bass boost. |
Silver Member Username: Ducka
Shelby Township,
MI
United States
Post Number: 322
Registered: Jan-08
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| Posted on Wednesday, July 16, 2008 - 12:03 pm: |
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Yeah if someone could find a calculator i would appreciate it. |
Gold Member Username: Big_edge_head
Milwaukee,
Wisconsin
Post Number: 2442
Registered: Mar-07
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| Posted on Wednesday, July 16, 2008 - 01:15 pm: |
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power * resistance = xx (sq.root of xx = your target voltage)
example... 1000watts * 1ohm = 1
sq.root of 1 = 31.6
or you can use this:
http://www.caraudio911.com/tutorials/GainSet/voltage.htm |
Silver Member Username: Ducka
Shelby Township,
MI
United States
Post Number: 323
Registered: Jan-08
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| Posted on Wednesday, July 16, 2008 - 01:44 pm: |
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thanks Stavenmist.
Does anyone know of a more accurate wattage value for the hifonics bxi1208D? I am assuming that it does not actually put out a full 1200watts.
If the cones of my subs get warm after a few minutes of playing "throw it up" does that mean that they are clipping?... I think I have heard that somewhere. |
Gold Member Username: Philly306
James Carrol is the re...
Post Number: 1203
Registered: Apr-07
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| Posted on Wednesday, July 16, 2008 - 01:46 pm: |
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Steve knows what he is saying but i think he got his math a little mixed up
1000*1=1000
SQ root of 1000=31.6
 |
Silver Member Username: Ducka
Shelby Township,
MI
United States
Post Number: 324
Registered: Jan-08
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| Posted on Wednesday, July 16, 2008 - 02:08 pm: |
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yeah i figured that lol.
but still,
Does anyone know of a more accurate wattage value for the hifonics bxi1208D? I am assuming that it does not actually put out a full 1200watts.
If the cones of my subs get warm after a few minutes of playing "throw it up" does that mean that they are clipping?... I think I have heard that somewhere. |
Gold Member Username: Nd4spd18
Northwest PA
Post Number: 7930
Registered: Jul-06
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| Posted on Wednesday, July 16, 2008 - 02:53 pm: |
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Those hifonics do about 75-80% of rated power so ~900w is a good guess. |
Silver Member Username: Ducka
Shelby Township,
MI
United States
Post Number: 327
Registered: Jan-08
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| Posted on Wednesday, July 16, 2008 - 03:03 pm: |
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could I take it to a car audio shop and have them test it to see what kind of power it is putting out? |
Gold Member Username: Nd4spd18
Northwest PA
Post Number: 7931
Registered: Jul-06
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| Posted on Wednesday, July 16, 2008 - 03:29 pm: |
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Most don't have the equipment needed or even know how to do it properly.
Just use 900w. |
Silver Member Username: Ducka
Shelby Township,
MI
United States
Post Number: 328
Registered: Jan-08
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| Posted on Wednesday, July 16, 2008 - 03:38 pm: |
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thanks |
Gold Member Username: Loc_out
SOCAL
2 RE 15 XXX
Post Number: 2289
Registered: Feb-05
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| Posted on Wednesday, July 16, 2008 - 04:59 pm: |
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MS is right shops around here mostly do it by ear. hard to find a good shop. |
Gold Member Username: Big_edge_head
Milwaukee,
Wisconsin
Post Number: 2443
Registered: Mar-07
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| Posted on Wednesday, July 16, 2008 - 06:26 pm: |
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"Steve knows what he is saying but i think he got his math a little mixed up
1000*1=1000
SQ root of 1000=31.6 "
Ooops lol. Thanks  Don't know how i missed that lmao. |
Bronze Member Username: Neptune07
Grand Junction/Golden,
CO
Post Number: 76
Registered: Jun-08
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| Posted on Thursday, July 17, 2008 - 01:16 am: |
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i have 2 12" alpine type r's. i randomly set it by just listening to the subs perform with it turned on low while adjusting the gain. i never turned my deck up over 21 and it goes to 60. so maybe i can turn the gain down a little, turn the bass boost to 0, and turn my HU up higher?
what is a DMM btw and how do i get ahold of one? |
Silver Member Username: Ducka
Shelby Township,
MI
United States
Post Number: 330
Registered: Jan-08
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| Posted on Thursday, July 17, 2008 - 12:22 pm: |
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its a digital multimeter. They sell them at like radio shack or other places like that.
Sounds like me and you have similar systems. I got type-r's too. I have bass boost all the way off and my gain is slightly less than half way up. Any higher and I noticed it starts to clip... I think. its kinda loud to tell thats why i wanna use a DMM.
"i randomly set it by just listening to the subs perform with it turned on low while adjusting the gain."
Having the subs turned down low to set you gain is a bad idea. Cuz once you turn it up it would be like turning the gain up even higher than you had it set.
The best way I have found to set gains is to play the tone that your subs play the loudest and play it at the volume level you listen to your music at so for you it would be at 21(have the gain and bass boost down at zero for that part). now leave that playing and slowly turn up the gain on your amp(check your subs frequently as you turn it up). You should notice when the subs start clipping if you listen hard. The only way I can describe it is that it is just a different tone almost. It sounds kinda dirty. Once you hear that turn the gain down a tiny bit so that you no longer hear the distortion and then you have your gain set. |
Bronze Member Username: Neptune07
Grand Junction/Golden,
CO
Post Number: 78
Registered: Jun-08
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| Posted on Thursday, July 17, 2008 - 01:41 pm: |
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thanks for the input i really appreciate it. i've never taken the time to learn about the gain or bass eq and its too bad cause i've most likely been over working my subs for the past year. when i get it installed i'll let you guys know where i end up setting the levels. (eq at zero of course) |
