sundown saz 1500

[rollerdj 10+ year member]

db-r, it's my old amp i bought strait from jacob. never used the bass knob on it, and never had to turn the gain past half to get it to wang.

eric, try unpluging the bass knob and see what it does. also, what kind of rca's are you using. i've heard of some giving those amps problems.

 

[sundownz Pro Seller]

What is the DCR of your load ?

 

[atlninja82 10+ year member]

Do you have the "wired remote control" plugged in? Did you buy this amp new or is this a refurb from us here at dB-r? If you "do" have the remote plugged in, unplug it and try again, you may have gotten the wrong remote control with your amp. If you look at the remote from the top, it is supposed to have a blue pot inside, if it is green, it is the wrong remote, and can cause symptoms like what you are talking about, if the amp came from dB-r, the green remote is "okay" because we mod the remote to work properly.
no i did not even try to hook up the remote.

If you don't have the remote plugged in, then it's possible your Sony amp had more power at 2 ohms. SAZ-1500D = 1 ohm amp. It is designed to run most efficiently and deliver full power output at 1 ohm. And if your sub is in a sealed box, your amp is likely never seeing close to 2 ohms period, probably 4 ohms at the lowest. Download WinISD, put in the parameters for your subwoofer and box and look at the "Impedance" plot, you will see what I mean....

what does the box have to do with the impedance?

I've got a 9886 and a Sundown SAE-1000D... I set my gains to 30/35, so that anything after 30 will start to distort a little. That being said, My gain is under 1/2 and it POUNDS the crap out of my old L5 (also wired to 2ohms at the amp)... No bass boost at all.

i donno why its doing this. i mean it hits but its not as loud as my sony. i thought the sundown should be putting out a considerable ammount more than the sony even if its rated 100 watts more at a 2 ohm load.

Maybe its a faulty HU and the bass output is blown?

na i dont think thats the case.

db-r, it's my old amp i bought strait from jacob. never used the bass knob on it, and never had to turn the gain past half to get it to wang.
eric, try unpluging the bass knob and see what it does. also, what kind of rca's are you using. i've heard of some giving those amps problems.

i tried and its not having problems its just not as loud.

What is the DCR of your load ?

whats dcr?

 

[dB-r 10+ year member]

what does the box have to do with the impedance?
whats dcr?

Impedance of the driver (subwoofer) rises as it moves.

DCR = the "ohms" (resistance to electical current flow) of your subwoofers voice coil (s) while the subwoofer is not moving.

Properly tuned ported (vented) enclosures help keep impedance rise to a minimum, whereas even properly sized sealed (closed) enclosures will allow A LOT of impedance rise to occur.

Your amplifier may be "seeing" a 4 ohm or 6 or even 20 ohm load at a minimum while your subwoofer is moving if it is in a sealed enclosure. If DCR is 2 ohms, and you were using a properly tuned vented enclosure, you could see actual impedance while the speaker is moving of around 2 to 2.5 ohms while the subwoofer is moving AT tuning frequency. This load that the amplifier actually sees will affect how much power output your amplifier will produce into the "load". Amplifiers generally produce less power at higher impedances.

 

[dbeez 5,000+ posts]

the sundown should crush that sony modded or not something is not right..

 

[SHOemup233 10+ year member]

ok to clear this up. my headunit settings are:bass- 0(flat)

subwoofer-15(max)

its an alpine btw

amp settings are:

gain- max

lpf-max(turned it all the way up because it was louder)

subsonic filter-doesnt matter its a sealed box.

bass boost- max

my subs are wired with the Voice coils wired in series, speakers wired in parallel. which gives me a 2 ohm load.

and even with my gain all the way up and bass boost down its not very loud.

Not sure if anyone else picked up on that. It does matter, sealed box or not. If you have your subsonic at 50 hz, everything under 50 will be very quiet. Make sure you have it set to 0 or off if it's in a sealed enclosure

 

[rollerdj 10+ year member]

i never use sub sonic filters on mine.

 

[SHOemup233 10+ year member]

i never use sub sonic filters on mine.

Sealed or ported?

Sealed it doesn't matter if you don't use it as long as it isn't set to something.

Ported you should definitely use it, but you can get away with not if your careful. Although I don't know why you would take that risk ported.

 

[TurdFergueson2 5,000+ posts]

i just hooked it up and im running it at 2 ohms. my subs are 400 rms a piece and i have 2 subs. and the amp is 800 rms at a 2 ohm load. i had a modded sony gtr 900 and it was 900 rms. the sundown did get loud when i cranked the gains. only when i cranked the bass boost all the way up was it as loud as the sony. i will say i could tell a difference in sound qaulity though. but my main question is, is it ok if i have the bass boost up? will it the amp be ok as long as i dont have low voltage drops?
thanks,

-eric

So......... the Sundown with cranked gains and bass boost only got "as loud" as the Xplod? //content.invisioncic.com/y282845/emoticons/wow.gif.23d729408e9177caa2a0ed6a2ba6588e.gif

 

[rollerdj 10+ year member]

Sealed or ported? Sealed it doesn't matter if you don't use it as long as it isn't set to something.

Ported you should definitely use it, but you can get away with not if your careful. Although I don't know why you would take that risk ported.

sealed. 90% of my stuff has allways been sealed. never been a fan of ported myself.

 

[rollerdj 10+ year member]

So......... the Sundown with cranked gains and bass boost only got "as loud" as the Xplod? //content.invisioncic.com/y282845/emoticons/wow.gif.23d729408e9177caa2a0ed6a2ba6588e.gif

that was the first thing i thought. i had this on my HDC310 and it put a hurting to that sub with the gains set back some. makes me wonder if there is something else going on. OP, put your sony back on and see if it's still not as loud.

 

[TurdFergueson2 5,000+ posts]

OP did you just pop the sony out and pop this in on that Sony wiring? I apologize if this was asked and answered. I'm not too familiar with the 1500Ds, can they accept 1/0 power and grounds?

 

[SHOemup233 10+ year member]

sealed. 90% of my stuff has allways been sealed. never been a fan of ported myself.

Gotcha. I just wasn't sure where you were going with your original post that's all.

 

[atlninja82 10+ year member]

OP did you just pop the sony out and pop this in on that Sony wiring? I apologize if this was asked and answered. I'm not too familiar with the 1500Ds, can they accept 1/0 power and grounds?

no i have 1/0 from the front battery(red top) to the 2nd battery(kinetic hc2400) and i ran 1/0 from the neg terminal to ground. 1/0 from positive to amp. 1/0 from amp neg to ground. before everything was the same except i ran 4 awg from the pos terminal to power on amp and 4 awg to the ground. rca's are still the same(cheap rca's) and same with remote wire but i dont think that matters.

So......... the Sundown with cranked gains and bass boost only got "as loud" as the Xplod? //content.invisioncic.com/y282845/emoticons/wow.gif.23d729408e9177caa2a0ed6a2ba6588e.gif

ha yea and on some songs its quieter. but the sundown does sound better.

Not sure if anyone else picked up on that. It does matter, sealed box or not. If you have your subsonic at 50 hz, everything under 50 will be very quiet. Make sure you have it set to 0 or off if it's in a sealed enclosure

its off and yes its sealed.

Impedance of the driver (subwoofer) rises as it moves.
DCR = the "ohms" (resistance to electical current flow) of your subwoofers voice coil (s) while the subwoofer is not moving.

Properly tuned ported (vented) enclosures help keep impedance rise to a minimum, whereas even properly sized sealed (closed) enclosures will allow A LOT of impedance rise to occur.

Your amplifier may be "seeing" a 4 ohm or 6 or even 20 ohm load at a minimum while your subwoofer is moving if it is in a sealed enclosure. If DCR is 2 ohms, and you were using a properly tuned vented enclosure, you could see actual impedance while the speaker is moving of around 2 to 2.5 ohms while the subwoofer is moving AT tuning frequency. This load that the amplifier actually sees will affect how much power output your amplifier will produce into the "load". Amplifiers generally produce less power at higher impedances.

wow i didnt know that. thats interesting. but that still doesnt help me understand why the sundown isnt louder.and the dcr on my subs is they are both dvc 2 ohms.

 

[SHOemup233 10+ year member]

I know this sounds like a bad solution, but have you tried simply unhooking everything, taking all the wires for the subs off, and redoing them. I realize you can eyeball them and see that they are right, but this same problem happened to my friend with a different amp. He tripled power and they were not anywhere near as loud. We checked the wiring over and over and I would have sworn it was right. We took it all off anyway, and redid it again, and it worked. The sundown should be louder though. Especially with bass boost and gain all the way up, holyshit. Something's wired wrong.