AP 1800 Louder then saz 3000d..Why?

[tc300 10+ year member]

Rise does come into play if you are ussing a dmm. When you use a dmm you are looking for a set power output amount at a rated ohm level. Even if you wire the amp down to 1 ohm nominal it could be seeing impedance rise up to 2 ohms and if you use your dmm to set your amp to put out the amount of power its rated to do at 1 ohm without knowing about the impedance rise youre going to fry your amplifier

Wouldn't a ddm atleast put you in the ball park of where u want the gain to be tho..??

And is box rise less noticeable when using a sealed box..?? I would say no but I overheard it being talked about a local audio shop over the summer....

 

[hispls 5,000+ posts]

they check em all. they said the fets are 10$ a piece and if they have to replace em all itll be high. like 160 plus 90$ labor. but only 2 were bad

You threw away money on that "repair" if he did not replace ALL the MOSFETs. This is total half *** and will very likely fail even if you get your electrical system right I wouldn't trust it. Any alleged amp repair person who does not change out ALL MOSFETs from the same batch of replacement parts is either a scammer or completely incompetent. You were told when you asked who the reliable repair people were.

Sorry if I am late to the party and this was already covered but I saw the pics of the blown amp bro. If one power supply fet died they should have replaced em all. They are all connected across the same two terminals that your buddy swapped the power and ground on. I would take it back and get your money back and send it to db-r . Power supply may not be operating normally even if the amp "works" . Hell some shady places nip out the one or two shorted fets and send you back on your way.

This dB-R or Ampmedics will do it right. May as well send the amp in to a competent repair person now before it blows beyond hope of repair.

Op that saz is gona need more electrical that what you have currently to get it running proper....

I'd like to see 2 good size deep cycles in the trunk anyway to run that amp safely. HO alt as well if you can.

Rise does come into play if you are ussing a dmm. When you use a dmm you are looking for a set power output amount at a rated ohm level. Even if you wire the amp down to 1 ohm nominal it could be seeing impedance rise up to 2 ohms and if you use your dmm to set your amp to put out the amount of power its rated to do at 1 ohm without knowing about the impedance rise youre going to fry your amplifier

Rise from 1 to 2 ohm.... I don't think you've ever looked at an impedance curve have you? Rising 4 to 10X DC resistance is highly possible. DMM is pretty pointless without a current clamp IMO. Use your ears and use your head and that'll do it if either works as it should.

Wouldn't a ddm atleast put you in the ball park of where u want the gain to be tho..?? And is box rise less noticeable when using a sealed box..?? I would say no but I overheard it being talked about a local audio shop over the summer....

Possibly, possibly not. Too many factors, without a proper loudspeaker measureing tool or DMM and current clamp + tone generator you'll never know what's happening at any given frequency.

This thread is a travesty. OP, please send your amp to a competent repair person and find a competent installer to install and set up your equipment.

 

[Julian 10+ year member]

Since when was the gain knob the volume knob? The position of the gain knob is to adjust your noise ceiling so you get less noise.

 

[IonRL205 10+ year member]

You threw away money on that "repair" if he did not replace ALL the MOSFETs. This is total half *** and will very likely fail even if you get your electrical system right I wouldn't trust it. Any alleged amp repair person who does not change out ALL MOSFETs from the same batch of replacement parts is either a scammer or completely incompetent. You were told when you asked who the reliable repair people were.

It sounds more like ben didn't wanna pay the quoted price to replace all the mosfets, so he cheaped out and just got the 2 bad ones replaced. I don't think it's on the repairer since he quoted the OP a price for it. Whether or not the price is too high or not, the OP still had the chance to ask other people for quotes on the repair to get a better price.

 

[ace_800 5,000+ posts]

I set with DMM and my gain is 3/4's up, voltage is 2.5 and no clipping.

 

[cdc351jeferson 10+ year member]

didnt see it stated what kinda wire and extra batts and such you got . whats your electrical like? also wtf why didnt you send it off to someone who knew how to fix an amp properly

 

[-BenBen- 10+ year member]

LOL. If you don't get it, just don't worry about it then.


Benbenondatrack,

Just giving you **** //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif

Although, IMO, your charging system did not suffice with the SAZ-3000D, perhaps if you have a good group 31 battery in the trunk though, then just the H/O alternator you have coming will be needed. But, the more the better of course. Did you check and see what exactly that battery in your trunk is yet? 1ohm as your nominal impedance will certainly cause for some decent current draw. If/when you have that AP amplifier tuned and producing as much clean power as you'll be able to obtain, undoubtedly the SA will be louder, ONCE it has the charging system it needs to produce some powah. Takes power to "make" power; even though the SA is going to be much more efficient than the AP, being that it is twice as powerful there is no way around that.

There are a bunch of people not too far North of you, hell, send some members in Bloomington, IN some PMs (I'll look in my contacts list for the ones I used to talk to). You'll get a lesson and get what you need. And eventually you ought to grab yourself an O-scope if you plan on getting really far into mobile audio.

Yea man ill appreciate that alot, thanks.

 

[-BenBen- 10+ year member]

It sounds more like ben didn't wanna pay the quoted price to replace all the mosfets, so he cheaped out and just got the 2 bad ones replaced. I don't think it's on the repairer since he quoted the OP a price for it. Whether or not the price is too high or not, the OP still had the chance to ask other people for quotes on the repair to get a better price.

not true, snoopdan refered me to this guy, so i tried him out. he said more then likely all of the mosfets needed to be replaced, but when i got to the shop, he checked all of them and said only 2 were affected. thats why he only replaced 2. he checked em all

 

[cdc351jeferson 10+ year member]

not true, snoopdan refered me to this guy, so i tried him out. he said more then likely all of the mosfets needed to be replaced, but when i got to the shop, he checked all of them and said only 2 were affected. thats why he only replaced 2. he checked em all

whats your electrical like ben

 

[-BenBen- 10+ year member]

didnt see it stated what kinda wire and extra batts and such you got . whats your electrical like? also wtf why didnt you send it off to someone who knew how to fix an amp properly

big 3, 0 guage from trunk to hood,(Monster) also ill have to look at the battery in my trunk but its big as hell. was a truck battery i believe

 

[cdc351jeferson 10+ year member]

big 3, 0 guage from trunk to hood,(Monster) also ill have to look at the battery in my trunk but its big as hell. was a truck battery i believe

that amps gonna draw alot of current . should have prolly big batts in the back

 

[-BenBen- 10+ year member]

that amps gonna draw alot of current . should have prolly big batts in the back

Im getting some soon

 

[Dirtrider4eva 10+ year member]

Find a cheap ac clamp and a dmm. Combine those to see wattages

 

[goingdef 10+ year member]

Rise does come into play if you are ussing a dmm. When you use a dmm you are looking for a set power output amount at a rated ohm level. Even if you wire the amp down to 1 ohm nominal it could be seeing impedance rise up to 2 ohms and if you use your dmm to set your amp to put out the amount of power its rated to do at 1 ohm without knowing about the impedance rise youre going to fry your amplifier

Well seeing as with most amps power drops as as the ohms rise I think you might want to look into this a little more, rise is only a need to know thing if your burping a tone and it has to be the same tone you tested with to find the rise so most find the tone that meters the highest then test for rise and make the appropriate adjustments.

 

[-BenBen- 10+ year member]

ok guys i guess it was the gain, i turned it up to about maybe 60% and it started coming to life, and i mean loud. i need a way better box but it def. it alot better then the ap 1800 now