2007 yaris amp tuning problem
Printed From: the12volt.com
Forum Name: Car Audio
Forum Discription: Car Stereos, Amplifiers, Crossovers, Processors, Speakers, Subwoofers, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=99186
Printed Date: April 29, 2024 at 12:59 PM
Topic: 2007 yaris amp tuning problem
Posted By: nexus1155
Subject: 2007 yaris amp tuning problem
Date Posted: November 20, 2007 at 12:58 PM
Ok so here is the setup I am using ... I am running off of the stock head unit with the subwoofer bridged and wired in parallel. I have the rear subs hooked up to the built in inline converter of the amplifier. THE PROBLEM: Everytime I try to go past a certain volume the subwoofer just cuts out... It is not a grounding problem because i sanded away a part of the unibody and mounted the ground down with a washer. Also if I turn the bass up higher it just cuts out as well... It is getting really annoying. For an 8" sub it fills up the hatch pretty nicely. Any help is appreciated, and yes I am not a noob, I used the search function already :P THANKS FOR THE HELP! Remote amp has a 2 amp inline fuse because i couldnt find a 1 amp and power wire is running a 50Amp fuse as well if i remember correctly.... NO lights are dimming when bass hits as well! Alpine MRP-M350 Specs Operating Voltage:
14.4V DC (11V to 16V)
Rated Power @ 14.4
200 Watts into 4 Ohms, 350 Watts into 2 Ohms & 700 Watts max power
Measured Power @ 14.4 Volts 1% THD:
255.5 Watts into 4 Ohms, 396.7 Watts into 2 Ohms (Max power rating not achievable with acceptable distortion)
Current Draw @ Max Power:
21.3 amps @ 4 ohms, 36.8 @ 2 ohms
Efficiency @ Max Power:
83% @ 4 ohms, 75% @ 2 ohms
Efficiency at 1/3 rated power:
83% @ 4 ohms, 75% @ 2 ohms
Amplifier Weight:
5.5 Pounds (2.50kg)
Amplifier Dimensions:
9-1/2ˇ¨ x 2-5/16ˇ¨ x 10-1/2ˇ¨
(241mm x 60mm x 233mm )
with this subwoofer
MA Audio MA80XE
8 Inch Competition Sub
Power Handling Capabilities:
250 Watts Minimum RMS to 500 Watts
Compatible with Sealed and Ported Enclosures
Dual 4-Ohm Aluminum Voice Coil
80 Oz. (5 pound) Double Stacked Magnet
Mounting Depth: 4.6ˇ¨
Mounting Diameter: 7.3ˇ¨
Optimum Vented Box: 1.0 Cu/Ft
Optimum Sealed Box: 0.65 Cu/Ft
Round Port Diameter: 3ˇ¨ x 9ˇ¨
Square Port Area: 2ˇ¨ x 4ˇ¨ x 11ˇ¨
Tuning: 40Hz
Replies:
Posted By: boogeyman
Date Posted: November 20, 2007 at 2:16 PM
wire your subs in seriesand then bridge to the amp..that should fix your problem
Posted By: boogeyman
Date Posted: November 20, 2007 at 2:19 PM
sorry for double post but you may first try level mathcing your hu loc and amp if not done so already....if no luck refer to my post above
Posted By: nexus1155
Date Posted: November 20, 2007 at 2:55 PM
yeah i tried level matching in 4 different locations of head unit and amp no luck but thanks alot ill give the rewiring a try.... :( I really did not want to re silicone the box again but if it fixes the problem. SO BE IT! ... Thanks for the help and ill get back to you once i finish this over break.
Posted By: boogeyman
Date Posted: November 20, 2007 at 3:06 PM
alright bud
Posted By: boogeyman
Date Posted: November 20, 2007 at 3:16 PM
just thought of something else it may be....some car manufacturers hu have ciicuitry built into them tha as you turn the volume up past a certain point the volume actually decreases to keep from blowing the factory speakers saving the manufacturer on warrenty cost ....usually found on your premium sound packeges. ....you may be better off ditching the stock hu
Posted By: KarTuneMan
Date Posted: November 20, 2007 at 4:07 PM
This amp is at least 1 year old....correct? So a 2ohm load should be NO problem, actually ideal. Thats not much amp for that sub. This rig has no factory amp. you can tag speaker level anywhere. What does this mean? Remote amp has a 2 amp inline fuse because i couldnt find a 1 amp. How are you turning the amp on? The deck shouldn't have an amp turn on output......never seen it, not in an OE deck. Make sure your sub is wired in paralell
Posted By: nexus1155
Date Posted: November 20, 2007 at 5:58 PM
Well the line was rated 12v i tapped in behind the facotry hu, its the headunit turn on and i just tapped into that so it just sends the 12v down the line for when the radio is on the amp is on as well.... as you said ... there is no remote turn on with this hu so i had to improvise.... is that a problem that i did that? regardless its still power and yeah im really OCD i made sure it was parallel... its - all the way through to amps - and + all the way through to amps +... i looked at a few diagrams to make sure it was correct...
Posted By: nexus1155
Date Posted: November 20, 2007 at 8:57 PM
Before bed bump! Thanks again for any advice!
Posted By: jrod83
Date Posted: November 20, 2007 at 9:54 PM
unplug one of the RCA's and then turn it up and see if it cuts out...then plug it back in at high volume and see if it cuts out... ------------- MECP Certified
I am the loudest and proudest member of the Fighting Aggies Class of '11 WHOOP!
SAW 'EM OFF!
Posted By: mobile1
Date Posted: November 20, 2007 at 10:35 PM
KarTuneMan wrote:
This amp is at least 1 year old....correct? So a 2ohm load should be NO problem, actually ideal. Thats not much amp for that sub. This rig has no factory amp. you can tag speaker level anywhere. What does this mean? Remote amp has a 2 amp inline fuse because i couldnt find a 1 amp. How are you turning the amp on? The deck shouldn't have an amp turn on output......never seen it, not in an OE deck. Make sure your sub is wired in paralell
That amp is a 2 channel amp correct? Well if the sub is a dual 4 ohm voice coil, then wiring the coils in parallel would give you a 2 ohm load, but if you bridge the amp the amp will "see" a 1 ohm load. The amp would then go in to protect mode at higher volumes. Change the wiring at the sub to series and you'll be ok. When he says there is a 2 amp fuse inline on the remote wire, thats what he means. His remote turn on wire for the amp is fused. Good for you, most people forget to fuse this.
Posted By: nexus1155
Date Posted: November 21, 2007 at 12:27 AM
Thanks, it is a mono block though so I don't know about that solution but it might make me put it in parallel anyways... Also its on an inline converter.... no RCA's Thanks for the replies!
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