cactus 7k daily OP.

[Revolution 10+ year member]

Well, I don't know how much difference some better components would make in the performance, not sure if it's clamping enough difference to be audible, but I do see it's got a lot of caps, and they are probably good ones, and that's really all I can see, but I know this design, yes, it's the same as in the 40.1's and MANY MANY other amps and that's not a bad thing. Those work well, and they are repairable (which is important to some people, not just me). Yes this board likes low impedance, higher voltages are okay too, and because the board is fairly small, and the components are compacted into this amp that vibration isn't the worst on it, as the board is stiff. This same design is used in other amps that don't look the same to the untrained eye, but I know they're the same and the boards are wider and those fail more often.... too much board flex.
I am going to say this again, and someone can argue with me if you really want to... These amps don't die from low voltage. People are always talking about how they think they killed their amp with low voltage.... It's just not true, every ****ed single one of these type of amps that have come into my shop have ended up with parts falling on the floor when I remove the spring clips... usually there are black/blue marks on the main board where the mosfets legs arced back over to the board during some serious board flex, and the mosfets shorts from the surge, goes 0 ohms internally and causes the power supply to see a dead short and POOF smoke rolls out of the amp.

I can say that I have no problems with the internals of this D9 amp from RD, it's the right design in the right package. What is the length of the RD warranty on this amp?

2 year warranty when installed by an authorized dealer.

 

[dB-r 10+ year member]

Nothing wrong with that. 2 years is a good number. Works for Sundown, can work for RD too.

I'd bet if you had a 40.1, you could run these two amps on the same sub with an amp on each coil, set the gains by reading the AC voltage to the sub coils to match so each amp is the same at that volume, and run this combo for a year or more with no issues. I don't think anyone can argue the 40.1 was a badass amp, and this D9 is similar if not the same (slight differences, but remember, they are only slight and might not even be audible).

 

[Revolution 10+ year member]

Nothing wrong with that. 2 years is a good number. Works for Sundown, can work for RD too.
I'd bet if you had a 40.1, you could run these two amps on the same sub with an amp on each coil, set the gains by reading the AC voltage to the sub coils to match so each amp is the same at that volume, and run this combo for a year or more with no issues. I don't think anyone can argue the 40.1 was a badass amp, and this D9 is similar if not the same (slight differences, but remember, they are only slight and might not even be audible).

I beleive it is a couple inches longer in length. I know it also does more power approx 600-800w @ 14v and 1600-2000 more at 16v.

Several usaci guys have tested them side by side in drop ins and clamped them

 

[TnT_Sounds 10+ year member]

Nothing wrong with that. 2 years is a good number. Works for Sundown, can work for RD too.
I'd bet if you had a 40.1, you could run these two amps on the same sub with an amp on each coil, set the gains by reading the AC voltage to the sub coils to match so each amp is the same at that volume, and run this combo for a year or more with no issues. I don't think anyone can argue the 40.1 was a badass amp, and this D9 is similar if not the same (slight differences, but remember, they are only slight and might not even be audible).

2 year warranty when "instaled by an auhtorized dealer". So that means no warranty for me or almost anybody who does their own shit.

I only care about an audible difference so thanks for pointing that out.

 

[dB-r 10+ year member]

I beleive it is a couple inches longer in length. I know it also does more power approx 600-800w @ 14v and 1600-2000 more at 16v.
Several usaci guys have tested them side by side in drop ins and clamped them

That seems to be alot of difference, more than I believe unless there something really different in there, but I know how these products are obtained and usually, yes you can request different parts but not likely enough to make that much of a difference. I don't trust no usaci guys either would have to see it myself.

I know someone who has some D9's locally, or at least they are supposed to have them and maybe one day I'll drop by and see if they will let me put my clamp on it. Guys a world record holder too so I know his electrical will be up to par.

 

[TnT_Sounds 10+ year member]

this thread is ghey now //content.invisioncic.com/y282845/emoticons/frown.gif.a3531fa0534503350665a1e957861287.gif

 

[dB-r 10+ year member]

I know right... But seriously I just don't think it would really make that much more power than the 40.1, but like I said there is a local guy, he's got some RD subs, he has a world record for a couple years, kudo's on the subs to RD, he was running db drive amps but switched to RD amps recently and I think he is down in score but I think he's on a new build too, so it may take some tedius tuning of the vehicle and enclosure to get it back where it should be (this is what I heard anyway). I think he's running the D9's now. I am sure RD knows who I am talking about and probably is gonna tell me I am wrong, but if not then I may run up there at some point and see if he will let me clamp it, but he probably won't, the guy usually won't let anyone get near it, period. **** comp guys and their secrecy bullshit, Hmmmm... suspicious maybe... but anyway, if it does do that much more power for real, then awesome, but I just don't believe that until I see it for myself with my own clamp. Oh, and RD. Kudo's too on adding the fins to the heatsinks. I think I worked on a couple RD's for people a while back, they were just like flat heatsinks, no fins, really light, was like a "hot plate". I am sure the fins help especially when the amps are really getting it at .5 ohm and all, heat is the enemy.

 

[TnT_Sounds 10+ year member]

I know right... But seriously I just don't think it would really make that much more power than the 40.1, but like I said there is a local guy, he's got some RD subs, he has a world record for a couple years, kudo's on the subs to RD, he was running db drive amps but switched to RD amps recently and I think he is down in score but I think he's on a new build too, so it may take some tedius tuning of the vehicle and enclosure to get it back where it should be (this is what I heard anyway). I think he's running the D9's now. I am sure RD knows who I am talking about and probably is gonna tell me I am wrong, but if not then I may run up there at some point and see if he will let me clamp it, but he probably won't, the guy usually won't let anyone get near it, period. **** comp guys and their secrecy bullshit, Hmmmm... suspicious maybe... but anyway, if it does do that much more power for real, then awesome, but I just don't believe that until I see it for myself with my own clamp. Oh, and RD. Kudo's too on adding the fins to the heatsinks. I think I worked on a couple RD's for people a while back, they were just like flat heatsinks, no fins, really light, was like a "hot plate". I am sure the fins help especially when the amps are really getting it at .5 ohm and all, heat is the enemy.

I thought the 16v rating is a little excessive and the 14v rating is pushing the envolope. But I wasn't going to say anything. //content.invisioncic.com/y282845/emoticons/greedy.gif.5a53e6246569d7ab79867170f3b06629.gif

 

[TnT_Sounds 10+ year member]

BTW Chris, you've been talking in here as long as I have.. Took the day off or what?

 

[dB-r 10+ year member]

BTW Chris, you've been talking in here as long as I have.. Took the day off or what?

LOL, not really, well, kinda. I been organizing around the shop and inventorying amps to update my lists etc today.

A long time friend of mine got killed Friday night in a motorcycle wreck, got a LOT of freinds and we all are kinda shook up still about it.... we got drunk all weekend long, last night too, in his memory, sucks today, hungover, you know how it goes unless you never had a hangover. So can't concentrate good today, so doing tasks that require minimal brainpower like inventory, cleaning, organizing, etc... well to some people that might be too much too, LOL.... But no seriously just recovering today and trying to get my head right and get back to work. Gonna be closed one day this week for a funeral I imagine, doubt they will wait till the weekend but they might, we are closed on weekends anyway.

 

[TnT_Sounds 10+ year member]

LOL, not really, well, kinda. I been organizing around the shop and inventorying amps to update my lists etc today.
A long time friend of mine got killed Friday night in a motorcycle wreck, got a LOT of freinds and we all are kinda shook up still about it.... we got drunk all weekend long, last night too, in his memory, sucks today, hungover, you know how it goes unless you never had a hangover. So can't concentrate good today, so doing tasks that require minimal brainpower like inventory, cleaning, organizing, etc... well to some people that might be too much too, LOL.... But no seriously just recovering today and trying to get my head right and get back to work. Gonna be closed one day this week for a funeral I imagine, doubt they will wait till the weekend but they might, we are closed on weekends anyway.

Ahh... Bummer man.. My best wishes to his family. I know what all that shit feels like. Best friend got killed in a car accident last year by a drunk driver. I still haven't recouped. But only time heals wounds. Ever since then I dont drink. But I hope everything goes well and sorry to here man

 

[dB-r 10+ year member]

Thanks man. I'll be alright, aint got no other choice... His family is taking it really hard too of course, but it's one of those deals where his family didn't really approve of his freinds and so therefore me and our friends don't really know his family well, he spent most of his time with us, or in the Pen, he was always in trouble, not by me and my friends but his "other" friends... which is why his parents didn't like us, they assumed we are all the same, kinda like I assume this D9 is the same as the good ol 40.1... which isn't a bad thing... Claiming even more power is hard to believe, maybe there's more than 16 outputs in there and I just didn't see it right, but I think I counted it right... Maybe they used a little beefier mosfets, but I doubt that, probably same exact parts. A few extra good caps wouldn't make that much difference and better output inductors wouldn't necessarily either.... just seems WAY off what the numbers should be in a drop in comparison in place of a 40.1....

 

[Annnarbor84 5,000+ posts]

2 year warranty when "instaled by an auhtorized dealer". So that means no warranty for me or almost anybody who does their own shit.
I only care about an audible difference so thanks for pointing that out.

Assuming the company is still around to honor it:laugh:

 

[TnT_Sounds 10+ year member]

Thanks man. I'll be alright, aint got no other choice... His family is taking it really hard too of course, but it's one of those deals where his family didn't really approve of his freinds and so therefore me and our friends don't really know his family well, he spent most of his time with us, or in the Pen, he was always in trouble, not by me and my friends but his "other" friends... which is why his parents didn't like us, they assumed we are all the same, kinda like I assume this D9 is the same as the good ol 40.1... which isn't a bad thing... Claiming even more power is hard to believe, maybe there's more than 16 outputs in there and I just didn't see it right, but I think I counted it right... Maybe they used a little beefier mosfets, but I doubt that, probably same exact parts. A few extra good caps wouldn't make that much difference and better output inductors wouldn't necessarily either.... just seems WAY off what the numbers should be in a drop in comparison in place of a 40.1....

Well, back to the d9 vs. 40.1, I wouldn't even be considering the d9 since there's no audible gain in just a "drop in" switch. I'm leaning towards the Sound Digital 5000.1's, I just hope they dont burn up from being hammered on daily. Also the 5 year warranty is the main squeeze for me. I started a thread on Termpro so hopefuly someone on there has a 5000.1 in a daily app to give me some info.

 

[KHARPS 10+ year member]

Well, back to the d9 vs. 40.1, I wouldn't even be considering the d9 since there's no audible gain in just a "drop in" switch. I'm leaning towards the Sound Digital 5000.1's, I just hope they dont burn up from being hammered on daily. Also the 5 year warranty is the main squeeze for me. I started a thread on Termpro so hopefuly someone on there has a 5000.1 in a daily app to give me some info.

Hey Travis let me know what you hear about the 5000.1s...I don't belong to that forum.