Printer Friendly Forum Posts - amp enters protection after volume 11

I am having issues with my amp entering protection mode after my stereo reaches volume 11. I have a pioneer TS-WX100BP setup and I am attempting to power it with a Sony Xplod XM-554ZR amplifier. I have had this sub powered by a Thump amp previously, but it stopped working, and i wanted a new one. The sony amp is brand new, and i have had the sub and box for a while now. After connecting everything the sub works until i hit volume 11. As soon as i go from10 to 11 the amp enters protection mode.( I usually listen to music around 25 to 30 volume) I would appreciate the help.

What impedance is your sub, and is your amp a 2 channel, 4 channel or a mono amp? it may have to do with the fact that the subs impedance it to low, and the amp can't handle the load that the sub is demanding from it!

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...half of the truth can be worse than a lie. <----Roger Russell said that..

My amp is a 4 channel amp, and my sub is a 4 ohm SVC

how do you have the sub wired into the amp?

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...don't crush the weasel...

... and how did you set your gain?

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The BEST you can hope for would be bridging two of the amp channels. You CANNOT use all four channels with a single voice coil woofer.

The 554 amp (I am gonna guess) is 55 watts X 4, at 4 ohms correct? Into 2 ohms, maybe 75 to 100 watts? In the case of a single 4 ohm bridged load, the amp will make around 150 to 200 watts per bridged pair. (It IS a Sony, so take those numbers with a BIG grain of salt...) The other channels must remain either unused, or connected to another woofer (or woofer voice coil, if you had a dual 4 ohm voice coil woofer) or speaker set.

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It all reminds me of something that Molière once said to Guy de Maupassant at a café in Vienna: "That's nice. You should write it down."

I bridged the two rear channels like the manual said to. Thats also how i had it with my old amp. To set the gain i had the gain as low as it would go and put my volume around medium of what i would use it and then turned the gain up....it also shut off after i turned the gain up past 3 quarters.

Do you have a Pioneer radio? Have you tried bridging the 2 front channels of the amp instead of the rear channels?

your gain should not be that high. should be around 0 to 30 % at max that is about as far as i will take any gain. if it still isnt loud enough then you need a bigger amp.

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you can do it....
advanced MECP, lol does it really matter....
patience is a virtue

charney wrote:

I am having issues with my amp entering protection mode after my stereo reaches volume 11.

I had the same problem with my new Alpine HU right - for weeks I couldn't figure it out. Checked the gains, voltage, everything. I called Alpine, JL Audio, probably posted here. . . .

Turns out I was so drunk when I wired the deck I hooked the left-front-negative speaker lead to the remote turn on. posted_image

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"I'm finished!" - Daniel Plainview

sedate wrote:

I had the same problem with my new Alpine HU right - for weeks I couldn't figure it out. Checked the gains, voltage, everything. I called Alpine, JL Audio, probably posted here. . . .
Turns out I was so drunk when I wired the deck I hooked the left-front-negative speaker lead to the remote turn on.

I love it!!! That makes me feel better knowing I'm not the only one that does these types of things after consuming lots of alcohol.... My problem is getting tanked, then think its a good idea to start a project, get half way through it, then say "F* it... lets go drink some more," then have to come fix the mess the next day with a hangover....

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...don't crush the weasel...

I have a kenwood head unit, the remote and everything are wired correctly, because i have had my dash taken apart about 4 times checking on that stuff.

haemphyst wrote:

The 554 amp (I am gonna guess) is 55 watts X 4, at 4 ohms correct? Into 2 ohms, maybe 75 to 100 watts? In the case of a single 4 ohm bridged load, the amp will make around 150 to 200 watts per bridged pair. (It IS a Sony, so take those numbers with a BIG grain of salt...) .

Curses.... those damn Sony watts. (who was the author of that post giving "in depth" description of the Sony watts?)

That was one of the funniest things I have ever read!

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KarTuneMan wrote:

Curses.... those damn Sony watts. (who was the author of that post giving "in depth" description of the Sony watts?)
That was one of the funniest things I have ever read!

Why thank you for remembering...

https://www.the12volt.com/installbay/forum_posts.asp?tid=52982&KW=sony+watts

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Someone had their thinking cap on that day...lol ! As far as the amp going into protection mode, have you check for an absolute ground on the amplifier ?

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Jeff
Velocity Custom Home Theater
Mobile Audio/Video Specialist
Morden, Manitoba CANADA

how do you check for an absolute ground?

Get a 5th of Absolute Vodka, chug it and in 30 minutes or so you'll be absolutely grounded

You really need to try running the front channels of the amp. There may be a problem with one of the rear channels of the amp. If it still has a problem you need to get a Volt meter, and right before the amp is at the point of cutting out, check voltage at the power and ground terminals of the amp.

charney wrote:

how do you check for an absolute ground?

forbidden wrote:

"take one probe direct to the neg battery terminal and the other probe to the potential grounding location. This will show the resistance from the battery instead of between two points. Never touch the probes as it throws the reading off. If the probes do not reach, use an extension wire to lengthen the reach. A reading of under .05 ohm is what I usually shoot for."

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Jeff
Velocity Custom Home Theater
Mobile Audio/Video Specialist
Morden, Manitoba CANADA