DHD Amps

[Emerge]

Hello, I have a DHD Ntx 2006 amp. I have had it for a while, and I figure I might as well do something with it. However, I have read mixed reviews for it and I'm wondering what everyone's best advice is.

It is a 2 channel amp, and the box says 200x200. I actually used it four or so years ago to power a 10 inch kicker sub, but that sub has been stolen since. So, I uninstalled the amp. When I did have the combo in there, I liked the bass I got, but I did think that there was probably more power in that sub that the amp couldn't produce even bridged.

So, anyway. What do you guys think? Is this useable? Should I try to get some money for it? What would you do if you had this laying around?

[Emerge]

Any input?

[talnlnky]

without the full specs on the amp we can't really tell you how much power it has... but if you take a look at the fuses and then multiple that by 7 and that will give you a decent idea of how much power that amp actually produces...

for example. Got a 2channel amp is rated 100x2, it has a single 20amp fuse.
20x7 = 140. so really, the most power it's going to push would be 70x2 (AT ITS LOWEST OHM LOAD)

So.. where does the 100x2 rating come from... well, lets say the 70x2 is at 2ohm, and the amp does 50x2 @ 4 ohm. Well the manufacturer was refering to peak power being 100x2, and it is coming for companies to rate the peak power of an amp, or the peak power handling of a sub at 2, 2.5, or even 3 times the actual RMS value. So, 50 times 2 = 100... so 100x2 peak power.


its a scam, and is very common.
DHD in the stereo social class system is somewhere in the lower class. Don't run it below its rated ohm load, and expect half the power its rated at and you shouldn't be too disappointed with it. If you have it, go ahead and use it. Amps are spendy, run it till it dies, then grab a different one.

[Emerge]

Here are the specs I can find online:

2 Channel
MOSFET Class 'A'
2 Ohm Stable
0.04% THD
Frequency Response: 15 - 30,000 Hz
Max. Power @ 2 Ohm: 200W x 2= 400W
Bridgeable :160W x 1=160W
Power @ 2 Ohm: 80W x 2 =160W
Variable Low Pass Filter
Power @ 4 Ohm: 50W x 2 =100W
Variable High Pass Filter
Low/High Level Input
Multi Channel Function (2/1/2+l )
2-8 Ohm Capability
Dimension: 11.8" (W) x 1.97" (H) x 7.87" (L)
Channel Seperation 55dB
Fuse 25 Amp

[talnlnky]

Here are the specs I can find online:

Max. Power @ 2 Ohm: 200W x 2= 400W
Bridgeable :160W x 1=160W
Power @ 2 Ohm: 80W x 2 =160W
Power @ 4 Ohm: 50W x 2 =100W
Fuse 25 Amp
[/LIST]

so... my rough guess would've been 25*7 = 175 bridge, they say 160bridged..
OR
87.5x2 @ 2ohm

Pretty close, so that amp most likely does put out the 80x2 or 50x2 that it is rated for.

50x2 isn't a huge amp by any means, it's decent for running a pair of door speakers, or an entry level 8,10, or 12" sub (as long as you don't expect it to get very loud).

[Emerge]

Would there be any way to get it to power all four door speakers? If not, I'm guessing the best thing is to run the larger rear speakers?

What is an example of an entry level sub?

[talnlnky]

Would there be any way to get it to power all four door speakers? If not, I'm guessing the best thing is to run the larger rear speakers?

What is an example of an entry level sub?

Entry level sub.... basically anything that costs around $100 or less for a 10" or 12". $100 will get you a fairly beefy 8" sub... tho its an 8" and won't be as loud as the 10" or 12" for the same price.

yeah, you could run two sets of doors speakers off that amp, however, you would lose your ability to adjust the front to back fader on your deck.

You'd go from giving 1 set of speakers 50watts each, to give two sets of speakers 40w each. It'd be noticeable louder, but not necessarily better.

The harder your amp has to work, the hotter it will run, and the shorter you can expect it's life to be.... Supposed to be 2ohm stable, so I wouldn't worry about it, unless you are concerned with the quality of the amp, or you run into issues with it popping fuses or turning off randomly.

[_S7V7N_]

I had the 1600 Watt DHD and sold it for 50 bux, That thing i bought used about three years ago, it never gave me any probs, it is a lower end brand and your bass output is going to be " okay ".

As far as Entry level you could probably check the Sunday paper and see what BestBuy has on special that week, they sometimes run some Pioneer subs which are like 50 bux buy one get one free or something, them will be around 150 watts rms. If not they sometimes have an amp and sub combo.

[Emerge]

Thanks for the advice guys.

Taln, I've read in numerous threads that you are currently running 8" subs. What type are you running? If I remember right, you said they were optimal because they still do put out plenty of bass and volume for your individual needs. Am I right? Or, were there other reasons on top of that?

I'm starting to get ideas of what I can do with this. I don't think selling it is an option because it goes for about $60 brand new right now on the net, so I probably couldn't sell it for more than $30 - $40.

[severous01]

if you want clarity you're going to have to pay for it. higher end amps produce more power, are clearer, less distortion, less heat, and wont make your headlights dim.

i'm going with kenwood amp, excelon series, and an excelon sub. 8" shallow. i'm trying to find someone to build a decent box under my pas seat. i'll put the amp under back seat, and upgrade the door speakers with some dB+ from polk. i think it'll be enough for me

[Emerge]

True, you get what you pay for.

[Emerge]

What do you guys think of these speakers to replace the OEMs? I have the coupe with 2 dash speakers, 2 door speakers, and 2 rear mounted speakers. These speakers correspond with the OEM sizes. It should make installation easier I think.

http://www.crutchfield.com/p_130TSG1043/Pioneer-TS-G1043R.html?tp=105

http://www.crutchfield.com/p_1086022SI/Infinity-Reference-6022si.html?tp=105

http://www.crutchfield.com/p_099SE6900/Eclipse-SE6900.html?tp=105

[talnlnky]

Thanks for the advice guys.

Taln, I've read in numerous threads that you are currently running 8" subs. What type are you running? If I remember right, you said they were optimal because they still do put out plenty of bass and volume for your individual needs. Am I right? Or, were there other reasons on top of that?

I'm starting to get ideas of what I can do with this. I don't think selling it is an option because it goes for about $60 brand new right now on the net, so I probably couldn't sell it for more than $30 - $40.

Bout 6 years ago I was making a system for the GF... She wanted something very small, so I picked up two Tangband 740 8" subs from partsexpress, at the time they were like $40 a pop... price has gone up a little since then. For the price they go for (around $50-60), I believe they are the best 8" sub you can buy. The GF never got the box & subs because we broke up about 3 days before the box was done painting.

hooking it up with dual 8's won't get crazy loud, not even if they are ported. If you want to simply add a smallest amount of bass you'll be fine with dual 8's... but if you want a lil bump in the trunk... we'll... the 8's would be fine for a month, then you'd get greedy and want more... Thats just how bass works... as soon as you get some, you want more... it's like money.

For most people on this forum, i'd recommend a single 10" sub in a small sealed box. with around 150-200rms.

I've always been a fan of infinity for a nice low cost decent performance speaker. I ran the green 2000 and before Kappa's, I've also installed the refrence components in a gf's car.

[Emerge]

Bout 6 years ago I was making a system for the GF... She wanted something very small, so I picked up two Tangband 740 8" subs from partsexpress, at the time they were like $40 a pop... price has gone up a little since then. For the price they go for (around $50-60), I believe they are the best 8" sub you can buy. The GF never got the box & subs because we broke up about 3 days before the box was done painting.

hooking it up with dual 8's won't get crazy loud, not even if they are ported. If you want to simply add a smallest amount of bass you'll be fine with dual 8's... but if you want a lil bump in the trunk... we'll... the 8's would be fine for a month, then you'd get greedy and want more... Thats just how bass works... as soon as you get some, you want more... it's like money.


Don't get me started on women dude, lol. At least you got yourself a decent little set up though.

For most people on this forum, i'd recommend a single 10" sub in a small sealed box. with around 150-200rms.

How do you feel about this sub in regards to your advice?
http://www.crutchfield.com/p_575R1L1X10/Rockford-Fosgate-Prime-R1L-1X10.html?tp=112


I've always been a fan of infinity for a nice low cost decent performance speaker. I ran the green 2000 and before Kappa's, I've also installed the refrence components in a gf's car


I'll have to do some research on those.


I'm having trouble deciding whether I should try to run the speakers on the aftermarket receiver alone and have my current amp run the sub, or getting a new amp to run the sub. I know I won't want an insane system, and i was almost just satisfied in my truck with just an aftermarket receiver and no other upgrades.

[talnlnky]

Don't get me started on women dude, lol. At least you got yourself a decent little set up though.



How do you feel about this sub in regards to your advice?
http://www.crutchfield.com/p_575R1L1X10/Rockford-Fosgate-Prime-R1L-1X10.html?tp=112



I'll have to do some research on those.


I'm having trouble deciding whether I should try to run the speakers on the aftermarket receiver alone and have my current amp run the sub, or getting a new amp to run the sub. I know I won't want an insane system, and i was almost just satisfied in my truck with just an aftermarket receiver and no other upgrades.

I have no experience with fosgate subs since about 2001... I ran some '98 XLC 12's, and a single Punch 8 as well. As far as that box/sub combo... ehhh, box is only 5/8" MDF..... would like to see it be 3/4"... but whatever... I'm sure it'll be fine for what you want. They with it is that it is easy, it won't give you anything spectacular, but it's about as easy as subs come in terms of installation.

As for buying a 2nd amp..... there are two big benefits to buying a second amp... so you can run your door speakers off an amp.

1) More power
2) a crossover, which will help reduce distortion, and if used properly, can allow you to listen to your music at louder volumes without increasing the risk of damaging them.

[Emerge]

So, if I were to get another amp you would recommend one for the speakers? I have six speakers inside my car, should I try to find a 6 channel amp? What types of specs should I be looking for?

[talnlnky]

I will assume when you say 6 speakers that you mean you have tweets + mids up front, plus another set in the back.

if that is the case, no you don't need a 6 channel amp, what you want is a 4 channel amp (as long as you have a crossover on those front tweets & mids).

I'll get flamed by this by many people in car audio, but honestly, there is a lot of controversy about the sound quality of amplifiers. Richard Clark, one of the most experienced guys in car audio put up a bet a long time ago that nobody could point out a specific amplifier 100% of the time in a double blind test... I put something like $10,000 up to back up his claim..... nobody cashed in on that deal.

the difference in cost I believe is mostly due to the following...
1) Cost of parts (quality of parts or proprietary & fancy heatsinks/casings)
2) brand name
3) type of amplifier technology used (class A/B, D, T, hybrid)

[Emerge]

I always suspected that, but I never had any evidence to validate my intuition.

I actually have 6 speakers in my car. I have 4" in the front right under the windshield, 6 1/2" on the doors, and 6x9s in the rear.

http://www.crutchfield.com/S-SIqPuxtdrvt/p_130DEHP480/Pioneer-DEH-P4800MP.html

General
Chassis Size Code IEJ
CEA-2006 Compliant No
RMS Power Output 22 watts
Peak Output 50 watts
RMS Power Bandwidth 50-15kHz
Preamp Outputs 6-channel
Sub Preamp Outputs Yes
Switchable Rear Preamp Outputs Yes
Preamp Voltage 2.2 volts
Display Color Multicolor
Key Button Color Green
EQ Bands 3
Sound Shaping Type Easy EQ
Wireless Remote Yes
Steering Wheel Control Compatible ---
Security Detachable face
Flip-Down Face Yes
Parts Warranty 1 Year
Labor Warranty 1 Year
Expandability
iPod Connection/Control ---
AUX Input Rear
USB Input ---
Memory Card Slot No
A/V Inputs No
Bluetooth Compatible ---
Satellite Radio Ready Both
HD Radio Optional
Navigation ---
Changer Control Yes
Tuner
Tuner Type Supertuner IIID
FM Sensitivity 8 dBf
FM Presets 18
AM Presets 6
European Tuning No
Seek/Scan Seek
Radio Data System No
Playback
CD Frequency Response 5-20kHz
CD Signal-to-Noise 94 dB
MP3 Playback Yes
WMA Playback Yes
AAC Playback ---
DVD Playback No

I've had this receiver for some time now, decent enough? I might replace it because the display isn't working properly. But, I'm not sure what I want yet. I'm thinking a double din with NAV and DVD if money allows.

[talnlnky]

SQcomp & I are both big fans of only having one set of speakers in a car.... now... we both plan on having 6 total speakers (before even considering subwoofers).

[Emerge]

I am now confused.

[talnlnky]

how so?

[Emerge]

You said you are a fan of having one set of speakers (meaning a pair; two total speakers), then you said you are going to have 6 total speakers. So, I'm confused as to what you prefer?

[talnlnky]

when I say a set of speakers.. I'm talking about all the speakers needed to play between 80hz to 20,000hz subs play 80hz and down.

SQcomp & I both plan on running a 8" or 6.5" midbass, a 4-5" mid, and a tweeter... three speakers on each side.. but, each with a crossover, and only playing a very limited range.

so... 6 speakers, but only 1 set of front speakers.

normal car speakers are known as co-axials, they combine the tweeter and the mid into one package... They don't have a midbass however, and have a much cheaper crossover.

You've got 3 sets of speakers it sounds like.

[Emerge]

Should I replace my front 4" speakers with just tweeters, the 6.5" door speakers upgraded to better speakers, but what about the 6x9 rear speakers? I'm guessing I can purchase speakers with crossovers already, right? A "crossover" isn't an extra accessory?

My bad for misunderstanding. I'm a noob.

[derickveliz2]

SQcomp & I are both big fans of only having one set of speakers in a car.... now... we both plan on having 6 total speakers (before even considering subwoofers).

Me too!

Tweeters / 4" midrange / 6.5 midbass


+ a 10 inch subwoofer in the trunk.

I'm going all active, too! Hey I'm learning here!

thanks guys

Derick

[talnlnky]

Should I replace my front 4" speakers with just tweeters, the 6.5" door speakers upgraded to better speakers, but what about the 6x9 rear speakers? I'm guessing I can purchase speakers with crossovers already, right? A "crossover" isn't an extra accessory?

My bad for misunderstanding. I'm a noob.

The old school of thought in car audio is that you need front & rear speakers... over the past 10-15years however people into sound quality (vs. getting stupid loud) have realized and proven that rear speakers are darn near worthless in a good sounding stereo system.

More speakers adds volume, but also adds a lot of complications and cost.
I highly recommend running a basic 6.5" component set of speakers up front plus a 10 or 12" sub. It'll keep costs down, simplify your install and be less stress on your electrical system.

I've never been a fan of 6x9's... but if you absolutely can't live without rear speakers, just fade 70% to the front, and run your 6x9's off deck power (unless you have some free amp channels).

[_S7V7N_]

You won't notice not having Rear speakers, Right now i'm just running my 6.5 components and 12's in the trunk, and don't notice any difference. I'm still in the process though of adding two sets of 3.5's around the car, I found places for two speakers now the second set i'm debating if putting them in the B - pillar or On that huge plastic piece under the bench seat, i have options, but, i have alot of other things going on so the project is on hold. The only reason i'm adding the other two sets is cause i have a four channel and don't want it to go to waste.

[Emerge]

To sum it up:

Tweeters
6.5s
Sub

Correct?

I've also read that you prefer subs with paper cones and foam surroundings. So for my sub, I should look for:

10 inch
Sealed Box
Foam Sorround
Paper Cone
250 RMS

That sound right?

[talnlnky]

To sum it up:

Tweeters
6.5s
Sub

Correct?

I've also read that you prefer subs with paper cones and foam surroundings. So for my sub, I should look for:

10 inch
Sealed Box
Foam Sorround
Paper Cone
250 RMS

That sound right?

don't worry about the surround and cone material right now.... thats getting into the nitty gritty. Get something that you won't be embarrassed to be seen with, and make sure it's made by a reputable company. If you start going with Pyle, legacy, boss, then you'll probably be upset with your results.

[Emerge]

I'm not sure what I would be embarrassed to be seen with. Lol.

[talnlnky]

I'm not sure what I would be embarrassed to be seen with. Lol.

Some people are in love with chrome/chrome plastic, LEDS, and other forms of audio bling... thats all.

[Emerge]

Oh!

I'm just into it sounding decent and not breaking my bank. I can careless how it looks. It's not like I'm going to attach it to my roof or something.

So, I took out my OEM HU and tried to install my Pioneer DEH-7800MP, but the display isn't working and the OEM's wiring doesn't fit the back of the Pioneer. Do stereo shops fix head unit displays, and sell wiring solutions?

[talnlnky]

Oh!

I'm just into it sounding decent and not breaking my bank. I can careless how it looks. It's not like I'm going to attach it to my roof or something.

So, I took out my OEM HU and tried to install my Pioneer DEH-7800MP, but the display isn't working and the OEM's wiring doesn't fit the back of the Pioneer. Do stereo shops fix head unit displays, and sell wiring solutions?

pick up a wiring harness for a Modern toyota... you can get them at car stores, stereo shops, or even walmart.

As for the display, it'd probably be cheaper to buy a new deck.

[Emerge]

Ugh!

Now I'm completely lost and don't know what to do lol. I'm going to have to look for a new receiver and I don't even know what to look for anymore.

[_S7V7N_]

Trouble shoot it first, Get the proper wiring harness you need and make sure that it doesn't call for an illumination connection. Probably and orange wire , or orange with white , if you have the proper wire harness it'll have it labeled.

[Emerge]

I got the harness. Man I messed up. I went to audioexpress and payed 22 bucks, online it was only 6.99.

Is this the trend? Online insane deals?

[derickveliz2]

I got the harness. Man I messed up. I went to audioexpress and payed 22 bucks, online it was only 6.99.

Is this the trend? Online insane deals?

Where online? how much was shipping? maybe it's not so bad. :iono: Consider the time you have to wait to get them by mail...

D.

[Emerge]

Yeah, I wanted it asap. There was one on amazon and another place too. I can't imagine shipping being more than a couple bucks.

[Emerge]

The stereo works fine, but the display won't show. I had to memorize all of the menus in order to work it properly. I'm still not sure about replacing it or not. I mean, it would be nice to have a display, but $$$ is a barrier. If I were to replace it, I would replace it with a double din receiver. Just leads me to think, if I'm going to get a double din I might as well get a NAV and DVD option with it as well. Hmmmm, also I'm a freak about things matching and my speedometer and all that lights up green at night. I would want them to match. So, unless I can change the color of the odometer and all that, I would want to get a faceplate that lights up green.


What do you guys think about these?

http://www.google.com/products?q=Alpine+INA-W900&scoring=pd&show=dd&sa=N&lnk=next&start=20

http://www.tundrapower.com/product/Eonon-D2206-2-Din-Motorized-
DVD/Default.aspx?gfid=p22

http://www.google.com/products/catalog?q=JVC+KW-AVX810&cid=4878887587329472345&ei=RXP1S8bwJojgNabokcoI&sa=title&ved=0CAcQ8wIwADgA#scoring=p

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=220604153319&rvr_id=&crlp=1_263602_263622&UA=WVF%3F&GUID=2fcd36421200a0b583c352c3fff8d823&itemid=220604153319&ff4=263602_263622

http://bestgoods4sale.com/pioneer-pioneer-p8800bt-radio-player-p-1007.html?currency=USD&language=en

http://www.cowboom.com/store/productDetails.cfm?contentID=218001

http://www.ecrater.com/product.php?pid=3487714

http://reviews.cnet.com/car-gps-navigation/pioneer-avic-u310bt/4505-3430_7-33712797.html?part=cnet-google

http://www.buy.com/prod/pioneer-avh-p3200dvd-car-dvd-player-5-80-secure-digital-sd-dvd-r-cd-rw/q/listingid/75624887/loc/111/214562978.html
I'd be nice if it came with a remote too. :)

[Emerge]

Does anyone have any opinions on any double din receivers?

[_S7V7N_]

Some of them prices are up there, i'd check locally just because if you're going to spend 800 bucks and the deck messes up in two months, it's going to be a Biatch sending it back and getting them to replace it on there 1 year manufactures warranty, the first thing they'll ask is " was this installed by a certified dealer "

[Emerge]

I'm getting the feeling these mess up often?

[_S7V7N_]

I got my Jvc 3.5 inch two years ago used from a buddy of mine, that thing still works fine, he only used it about six months, and i believe he bought it online. I only paid 150 bucks for it, so if it lasted me six months, it's a deal, hell i'm going on three years this September with that dvd player. I'm lucky i guess, cause i've heard some horror stories.

[Emerge]

Horror stories from that same receiver, double din receivers, or receivers in general? I'm so stuck on this decision, I don't know how to make the choice. I know I don't want to pay more than 300 on it. And, even that is a stretch on my low income.

[_S7V7N_]

I'm paycheck to paycheck as well, so i know exactly how it is, You ever shopped on Amazon.com ? They have some okay priced Pioneer Double dins and they have a few motarized flip up screens, there shipping is usually on point, and if you've never opened an account with them you can get a free prime membership for like a month and get stuff 1 day shipped for like 4 bucks. If you do the prime, you can get free shipping and pay like 99 cents on phone cases, Ipod accessories, and different electronic wiring. Bit off topic but you'd be suprised on how thankful the wife would be with a whole charger set for her phone, or a case, she'll think you spent some serious cash and forget about how much you spent on the car = )

[Emerge]

I've only bought books and movies from Amazon. I'll check out their deals. Hey man, anything we can pull out of our sleeve to keep the wife happy is worthwhile sharing!

[Emerge]

For the sub woofer recommendation, what is best the dual 2 ohm or the dual 4 ohm?