Printer Friendly Forum Posts - Ultimate DT2-800 digital amplifer

https://www.ultimate-sound.com/pdf/technical/platinum/dt2-800.pdf

Has anybody had expereince with this amp? I've read nothing but good things about it. It's MSRP is $700 and Sound Domain is selling them for $199 on special purchase. This is a digital amp with crazy power. I'm powering the 2 MTX 8000 series woofers in a enclosed box. Here's the stuff I bought today from SD. I'm building my system around the Panasonic 7300U in dash DVD player. Am I building a good system? Oh yeah, my weak link is my Coustic 481QE 480W amp that I will be running the MB Quarts at 60W X 4 at 4ohms for max quality.

Lightning Audio Strike LSD10 Stiffening Capacitor	1
MB Quart REFERENCE RKC110 2-Way Speaker	1
MB Quart REFERENCE RSC 210 Component Speaker System	1
MTX Audio T8124A Open Box Subwoofer	2
R/T 326-12 Subwoofer Enclosure	1
Stinger Custom Pro SWK4D Amplifier Wiring Kit	1
Ultimate DT2-800 2-Channel Amp	1

I'm installing the amps in the trunk of my Lexus LS400. So if I don't like the quality of this Coustic 481QE I cas easily switch it out. I actually had a Coustic 380 amp about 15 years ago that powered 2 - 10" woofers that did a great job. I got the amp for really cheap off eBay so it's no biggie if it doesn't work out.

https://www.ultimate-sound.com/home.html

Here's the link to their website.

Do I setup the 2 - 12" woofers in parellel or series with this 2 channel amp? I will be mounting the woofers in my MDF enclosure myself.

im sry youve had this entire post to yourself, do you have the svc or dvc models? hopefully the dvc models for ease of wiring, but if you have the svc the only way you can wire them is one per channel, but they will only get a supposed 200wrms from the amp in which mtx suggests a 400wrms per sub.

if you have the dvc models let me know and ill help you more.

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Quad L Handyman services

Hehe..... I know, it's lonley.... posted_image

Here's the specs if you could take a look and tell what you think> https://www.ultimate-sound.com/pdf/technical/platinum/dt2-800.pdf

I'm reading 2 X 200W at 4ohms <0.05% THD, 2 X 400W at 2ohms <0.2% THD or 1 X 800 at 4ohms <0.3% THD. I don't know about dvc or svc models? Here's some reviews at SD (bottom)> https://www.sounddomain.com/sku/ULTDT2800

posted_image

Here's a pic of the amp> Ultimate DT2-800 Full Range Digital Amplifier

The subs that you have are the 4 ohm single voice coil model. The only way to maximize the output of you amp would be to get the dual voice coil subs and wire them in parallel than into series to present a 4ohm load to your amp.

In regards to the amp it is very clean but power hungry when pushed. I have one bridged into two dual 4-ohm MTX-6000's. I have been running the amp bridged over a year now and it has never shut down once.

So what's the best way to setup these 8000s with this amp. 2 X 400 at 2ohms? https://mtxaudio.com/caraudio/products/subwoofers/thunder8000.cfm

I have a 1 fared capacitor that I am dedicating to this amp. Is that enough since it's very power hungry? Thanks fuseblower.

How should I wire this? Can I get 400W per woofer with this amp? Since these are SVC woofers will I be limited to 200W X 2 at 4 ohms a side? Do I really need DVC woofers to maximize this amp? What would be the wiring diagram? Thanks.

Thanks for the advice fuseblower! I called SD and cancelled the 2 MTX woofers and then got these 2 Rockford Fosgate Punch HE2 RFP4212 Subwoofer DVC 4ohm woofers> https://www.sounddomain.com/sku/ROCRFP4212 My order doesn't ship out until later this afternoon so I caught it in time. Thanks.

How do I wire these? Pararrel or series? It sounds like you mean both? What would be the wiring diagram? Thanks.

fuseblower wrote:

The subs that you have are the 4 ohm single voice coil model. The only way to maximize the output of you amp would be to get the dual voice coil subs and wire them in parallel than into series to present a 4ohm load to your amp.
In regards to the amp it is very clean but power hungry when pushed. I have one bridged into two dual 4-ohm MTX-6000's. I have been running the amp bridged over a year now and it has never shut down once.

I now see what you're saying with dual voice coil woofers. You would run each DVC woofer in parallel then run both woofer in a series to the amp. Ok, I'm starting to absorb this now. My question is why would you want to set this up at 1 X 800W in bridged mono at 4 ohms, <0.3% THD? This amp does a clean 2 X 400W at 4 ohms, <0.2% THD. Wouldn't the 2 ohm setup at 2 X 400 have less distortion (<0.2% THD) and deliver the same power to the woofers?

I would assume that if you tried to run these woofers in parallel only (@ 2 ohms, no series) then mono bridged the amp, it would try to push out 1 X 1600W's? That would blow the amp I guess?

/\Check that aboove/\ I mean 2 X 400W @ 2 ohms, not 4 ohms. Is it better to bridge at 1 X 800W at 4 ohms? I'm just looking at the THD% on this comparison. The lower the better is what I've read? The watts (800W) to both woofers is the same so why would bridging be better?

FB - Are these Ultimate DT2-800s quality amps? I'm asking for your honest opinion from your experience? Does digital make a big difference? Thanks.

The main goal is to run the least distortion to you mids-highs. When it comes to your subs it is important to keep distortion down but not as important as it is with you mids-highs. Both wiring options will allow you maximize your amp

The only difference is (depending on your set-up) your subs will fade from left to right when in stereo mode and in the bridged (mono) they will not fade form left to right.

Ultimate has been around for years. The first ultimate amp I ever purchased was in '96, back then they came with certifications of output. That amp was rated at 2 X 150 and actual output was 2 X 183 at <0.05% thd.

I've had my amp over a year and the only time it shut down when my subs blew.

Digital amps are more efficient than the normal A and A/B amps which makes them more friendly to your cars' power supply.

This link lets you know a little about the technology in the amp that you have. https://www.tripath.com/downloads/an1.pdf

Excellent point on fading from L to R in stereo mode. Mono would make the most since like you said. Thanks for clarifying that. I will set each DVC woofer up in parallel then run them together in series. I should get quite a bit of bass off this setup with 800W's of clean power? You said these amps draw quite a bit of power at full load. I'm adding a 1 fared capacitor for the Ultimate amp only. I'm not going to run my other 480W amp off the cap, just the 800W by itself. My alternator is pretty heavy duty on my Lexus LS400. My other amp is a Coustic 481QE that I'm going to use at 4 X 60W @ 4 ohms with my 4 MB Quart speakers. I can also run that amp at 4 X 120W @ 2ohms. Is it possible to run the MB's at 2 ohms or would you even want to because of quality? They both have a Recommended RMS power of 30-80W. I'm sure this amp will do more than 60W @ 4 ohms anyway? I actually had very good luck with a old Coustic 380 amp about 13 years ago. It was a solid amp for me that gave me plenty of power and pretty good quality. Coustic has been around for a long time. Here's the amp I'm using to power these speakers> https://coustic.com/products/amplifiers/481QE.cfm Here's the speakers that I'm using.

https://www.sounddomain.com/sku/MBQRSC210

heh im glad your not alone in this post ne more, you two got alot done while i was off at school.

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Quad L Handyman services

Thanks for this link https://www.tripath.com/downloads/an1.pdf That was good reading. It seems like all amps will eventually go digital? Don't you think?

fuseblower wrote:

The main goal is to run the least distortion to you mids-highs. When it comes to your subs it is important to keep distortion down but not as important as it is with you mids-highs. Both wiring options will allow you maximize your amp
The only difference is (depending on your set-up) your subs will fade from left to right when in stereo mode and in the bridged (mono) they will not fade form left to right.
Ultimate has been around for years. The first ultimate amp I ever purchased was in '96, back then they came with certifications of output. That amp was rated at 2 X 150 and actual output was 2 X 183 at <0.05% thd.
I've had my amp over a year and the only time it shut down when my subs blew.
Digital amps are more efficient than the normal A and A/B amps which makes them more friendly to your cars' power supply.
This link lets you know a little about the technology in the amp that you have. https://www.tripath.com/downloads/an1.pdf

The coustic amp seems to be a pretty good amp. From looking at the specs the amp will put out a little less than 60 watts since the ratings were done at 14.4 volts. You will want to run you seps at 4 ohms to keep it clean and also you don't want to over power your bass.

Yeah, the bass is in the trunk though. I suppose I need lots of power to penetrate the over insulated Lexus? Check out this hell of a deal on this KX800.4 Car Amplifier 4 Channel> https://www.hookedontronics.com/show_product_details.jsp?cid=4323

If that Coustic doesn't sound up to par, I'll get this amp above for $268. I know that's a great deal. 100W X 4 @ 4ohms of clean power should be more than enough?

I think you will like the current set-up that you are going with. I know that everyone believes in Rockford, JBL and other name brand compenents. I once believed that way until I was made a believer and started learning about electronics.

Hehehe....thanks FB. I guess system matching is kind of a art too? I bet there are all kinds of systems matched with "inferior" products to "respected" products that sound awesome? I don't think you can get away with matching up cheap products with cheap products and expect it to sound incredible? I just got the Coustic 481QE via UPS today. I bought it private off eBay. It looks and feels (heavy) like a pretty quality amp. It's not small either.

I bringing all my stuff down to get installed today. I built my box last night. I used the medium sized RT MDF box w/2 - 12". I wired my Fossgate RFP4212 DVC 12" woofers (400RMS, 800 peak) in pararrel then a series on the outside of the box. Maybe I should of put some kind of acrylic material in the box? Should I?

This system should put out some pretty good dbs? What do you think with this pairing: The Ultimate DT2-800 amp bridged in mono at 800W with this box and woofers? What should be my projected dbs?

I think the Coustic 480 at 60 X 4 should do great with my 4 MB Quarts? This system should be pretty solid.

I have never had my system tested for SPL. Since it is a truck I am limited to space. Being that I don't want to modify my interior much I am not able to turn my system up with out blowing my subs.

Let me know what you think of the amps after everything is installed.

My amp has not let me down one time for the price and performace.