GTDaudio GTD-750 Power Amp Review.

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drzinc

drzinc

Trini missing JTV
Jun 7, 2008
4,055
2,584
Toronto
www.drzdj.com
GTDaudio GTD-750 Power Amp Review.​
Specs
? 1500 Watts RMS @ 8 Ohm Bridged Mono
? 2 X 2250 Watts RMS @ 2 Ohms
? 2 X 1250 Watts RMS @ 4 Ohms
? 2 X 750 Watts RMS @ 8 Ohms
? Inputs: 1/4", XLR ,
? Outputs: Banana Binding Post, Speakons
? Left / Right Level Controls
? Dual Fan cooling System
? Ground Lift
? Protect LED
? Peak LED
? Rack Mountable
? Power Supply: 110 Volt
? Dimensions ( W x H x D ) 19" x 4" x 17"
? Weight: 48 lbs

First impressions
The amp is moderately heavy for an amp with these specifications it has a solid aluminum front plate and steel case. Fit and finish is quite good nothing feels loose. Overall the amp does not feel cheap.

Front face has all the normal buttons and meters you would find on a pro power amp. Power rocker switch left and right gain controls and signa.l power and clip leds.
On the back it has XLR and TSR inputs a ground lift switch varable high pass filters and switches for each channel a gain switch stereo mono and bridge switch and to round it off speakon and banana plug speaker outputs.

Installed the beast into my rack and ran it full range first. It is a quiet amp no hiss or hum when no signal applied. Running full range the amp was very neutral. I plays much louder than my Carver but my Carver is half the power output. Set it up as a sub amp and here is where it shines it controls my subs well and never seems to run out of power. I played both 2 and 4 subs with this amp and it handled it with ease. It draws cool air from the back and forces it out the front keeping the other stuff in your rack away from warm air.
Conclusion
Fit and finish 9/10
Ease of use 10/10
Sound quality 9/10
Weight 7/10 (a bit heavy)
Price/Value 9/10

This amp cost me $360 Canadian dollars shipped. For those in the US it is $249 US shipped.
 
I know from previous posts that you are knowledgeable. How did you choose this amp? Do you know someone that used one and had a positive experience? I assume this is made in China. Have you tried it with full range cabs? Can you test the output to see how much power it's really putting out? I'm skeptical because this is a pretty unknown brand at least to me. How does this amp compare to the Behringer EP-4000?
 
I am curious how they headline it as a 4500 watt amp
with this info following.
Something doesnt add up. Unless its that stupid new math. Oh yeah and at $300 dollars minus Zincs claim of 50 dollars off?
 
There's no such thing as a free lunch, if it's too good to be true it probably is, you can't make a silk purse out of a sow's ear, good things are seldom cheap and cheap things are seldom good, etc. There's always exceptions, but I'm beginning to understand that not all power amplifiers are the same or sound the same. As much as I love the convenience, portability and reliability of my Yamaha EMX512 powered mixer, it just doesn't seem to have the clarity and thump of a separate mixer and power amp. Is it the internal amplifier, the mixer, or both?
 
The Wizard Of OZ said:
I know from previous posts that you are knowledgeable. How did you choose this amp? Do you know someone that used one and had a positive experience? I assume this is made in China. Have you tried it with full range cabs? Can you test the output to see how much power it's really putting out? I'm skeptical because this is a pretty unknown brand at least to me. How does this amp compare to the Behringer EP-4000?
Click to expand...

I found out about an older version of this amp on another audio site that deals with audiophile systems. The guy wanted somthing to drive some subs he had made to compliment his ribbon speakers. The older version was 3 rack space unit. The difference other than height is that it got longer, the back pannel got cleaned up also loosing dip switches for push buttons for bridging an filter functions. THe version he had was put on a tech bench and it produced 740wpc @ 8ohm when both channels were driven and a bit more when one was used. Like any high power amp it need good power from your mains. Inside looks clean with aluminum heath sinks and nice wiring. It is built as well or better tan anything comming out of a Behringer factory. The only grief i have with this amp is the lack of handles it was hard to wiggle into my rack, and since it is so deep keep it as your last thing in your rack.
BTW the guys that makes these amps also makes a some great cordless mic systems that i got before the amp and I am happy with this also. Sometimes a great little company comes around and becomes a dimond in the rough.
Also they have been around for about 9 years.
 
Thanks for the review and info.

What other amps were you considering before you finally bought the GTDAudio amp? Anything else you can tell us about it?
Can it be run at 2ohms?
 
Pee pee ca ca (not the amplifier, the rating)

Jon Tuck said:
I am curious how they headline it as a 4500 watt amp
with this info following.
Something doesnt add up. Unless its that stupid new math. Oh yeah and at $300 dollars minus Zincs claim of 50 dollars off?
Click to expand...


Jon what are you curious about? The numbers (claimed) are right there on the 2 ohm line (2 x 2250 = 4500). In today's environment if you can get a box to put out that power for a nanosecond you're good.

Can you imagine if the rest of the economy were forced to have a non standard pound of sugar or kilowatt hour? We used to have one for amplifiers but no more.

In order for the specification to be meaningful you have to have a bandwidth, distortion figure and time. Without that you have pee pee ca ca.
 
The Wizard Of OZ said:
Thanks for the review and info.

What other amps were you considering before you finally bought the GTDAudio amp? Anything else you can tell us about it?
Can it be run at 2ohms?
Click to expand...

To be truthfull I realy did not need another amp but after the review and good price I took a chance on the amp and would keep it as a backup to my QSC PLX 3402. Since I had good luck with my wireless mic system and they said they would take it back if I was not happy. Well happy I am and now my Carver is now my backup and my QSC has now become my amp for driving my tops. It says it can do 2ohms but you probally would need a dedicated 15 to 20 amp circuit. I run 4 B52 folded horns with this amp (running in mono mode) and all I can tell you is my clients smile when the dancehall, reggaeton, hip/hop and dance tracks play into the bottom octives. Oh yea the Modern jazz and standards have some nice bass also.
 
Jon Tuck said:
then WOW what a deal!!! If only it had Ears!
Click to expand...

Do you mean Rackmount Ears? If so they do have rackmount ears. Zoom in on the pics.
 
Ok, a couple more questions if you don't mind.

You said you set it up and ran it full range, what speakers were you running and what is their power rating? Did the clip lights come on at all?

Other than the weight, this amp sounds like a great deal. It just seems too good to be true. Please continue to put it to the test and let us know how things go. Would you be willing to put a 2ohm load on it for a half hour to see if it runs cool or ????
Thanks
 
Here is my iron in all their glory...
amps.jpg
 
drzinc said:
The only grief i have with this amp is the lack of handles it was hard to wiggle into my rack, and since it is so deep keep it as your last thing in your rack.
Click to expand...

My attempted humor fell on deaf ones!! This is what I was alluding to.
 
drzinc said:
BTW the guys that makes these amps also makes a some great cordless mic systems that i got before the amp and I am happy with this also. Sometimes a great little company comes around and becomes a diamond in the rough.
Also they have been around for about 9 years.
Click to expand...

Buyer beware: These guys don't really make anything; they're just importing stuff from overseas and stamping their brand on it. I wouldn't call them a "great little company". After 9 years, any serious electronics manufacturer should have a dealer/distribution network in place and real marketing/advertising. Do a search for "GTD Audio" and half of the results are message boards where people ask "Has anyone ever heard of GTD Audio"? In my book, that puts them in a very "fly-by-night" kind of position. Pyle Pro and Technical Pro also fall into this category.

Looking at the picture, it's easy to see that this is not the best gear. The giveaway is the word "Professional" right on the front panel. If it was truly professional-grade, they wouldn't have to tell you by etching it on the face of the product.

(On a side note: some new electronics companies actually make an effort to establish a solid reputation, like Spyn Audio. Based on the feedback I've heard from dealers and other product reps, they're worth a look).
 
Even the big boys use this phrase case in point.
rmx4050_ft.jpg



B-Sharp said:
Buyer beware: These guys don't really make anything; they're just importing stuff from overseas and stamping their brand on it. I wouldn't call them a "great little company". After 9 years, any serious electronics manufacturer should have a dealer/distribution network in place and real marketing/advertising. Do a search for "GTD Audio" and half of the results are message boards where people ask "Has anyone ever heard of GTD Audio"? In my book, that puts them in a very "fly-by-night" kind of position. Pyle Pro and Technical Pro also fall into this category.

Looking at the picture, it's easy to see that this is not the best gear. The giveaway is the word "Professional" right on the front panel. If it was truly professional-grade, they wouldn't have to tell you by etching it on the face of the product.

(On a side note: some new electronics companies actually make an effort to establish a solid reputation, like Spyn Audio. Based on the feedback I've heard from dealers and other product reps, they're worth a look).
Click to expand...
 
As far as I'm concerned performance is the bottom line. If it actually does put out near 750wpc@8ohms and it sounds good, for $250 it's a good deal. If it dies 6 months or a year after you bought it then it's not a good deal. I'm skeptical and curious at the same time. I don't have $250 to waste so I'm being cautious. I wish Peavey would hurry up and bring their new light weight amps out already, jeez.
 
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