This is the worst piece of equipment I had bought. The sound is good, but the gremlins are way to many. The unit will stop working for no apparent reason and only resetting the unit will make it work. It also had a terrible hum. After a few months I was able to figure out how to get rid of most of the problems, being an electrical engineer and a former tech helped, but I cannot imagine a non technical person using a product, that in my opinion, was not ready for the market. Finally after 4 months the power supply died.

This unit is crap. After 3 months it broke, took a 1.5 months to fix and it died again few hour after I picked it up. Terrible hum even with isolators, kept hanging, some channels will get muted for no reason and most of the times only unpluging and pluging it back will make it work. The volume control is weird, no sound until you turn it about 1/4 of the way and it will peek before it is all the way up. Also the color from the video out was off, yellow was so off that was almost orange. The store that sold it to me told me that they do not sell that model anymore because they had too many problems with it, even their demo unit was broken. I gave up and bought a Sony TA-E9000ES, way better unit, sounds good and the hum is gone. If they ever fix it I will have a $1500 door stop!

I too waited 6 months to enter this review. Yes the volume control was a mistake (nobody explained the intent was to eliminate any accidental blasting of speaker volumes and damaging those babies) - but imagine your favorite sporty ride with an accelerator funtioning like that! Main pain is doing your balance checks and trying to "guess" the impact of your hitting the remote vol. controls. My hum was only during 2 ch. listening and could be heard on the center and surrounds. Was all set to send it back for fixing when it went away with a complete re-do of the system wiring when the new rack furniture arrived. Blame that on me not Adcom. Only scary thing now is the stopping of sound for no reason (or a roaring "expensive" sound sometimes) this is gone with one quick change of source and back again. Other mentioned flexibility - oh yes! On the fly tuning of the entire speaker array is great. Sound is up there in big buck league - terrific. I use the DACs with a entry level Marantz CD player as transport; fantastic and ez on the wallet. Adcom needs to send us all a fix for the volume control then my 3.5/4 goes to a 5!!

Terrible unit. I had been fixed by Adcom a couple times and is it still is no good. After I turn it off it will hang for no reason and it will only come back if I unplug it for a few minutes, kind of make the control remote not too useful.

I purchased the GTP-740 for home theater along with an Adcom 7500. Well the 7500 sounded open and with a tight lowend. However, the 740 had a hum that sounded like a transformer humming. The noise floor of this pre-amp was very high with a subtle hum comming from my speakers at all volumes. I called Adcom and inquired it there was a problem with the 740 series and was assured that there was not. The pre-amp has since been returned to Adcom for service to determine the source of the hum. That being said, I did notice on the box that the pre-amp was designed in the United States. However, it was built in the Peoples Republic of China. Perhaps due to this, the quality control and quality of the parts are less than what is expected in the United States. I'll keep you posted as to the results from Adcom's service.

I recently purchased the GTP 740 in tandem with the GFA 7500 five channel amp. I experienced none of the sonic problems of the previous reviewer, because I did not keep the piece long enough to accurately access its sonic capabilities.
The thing was just too darn loud. I mean, the King Tut exhibit displayed less artifacts than this unit. Every source switch was greeted with an annoying spike,
no matter how much I isolated it. Each power up was ceremoniously recorded with a huge thump through the powered drivers of by DefTech BP 2002's. No amount of tweaking with two different line conditioners (Adcom, Paramax) or running each piece straight to a wall plug could quiet the 740. The digital volume control sent an annoying "butterfly" artifact to all five speakers. It even popped loudly when changing surround modes. And powering down was excruciating...

To say that I was disappointed with the noise associated with the GTP 740 would be a massive understatement. I returned it to the dealer and troubleshot it with their reference system, as well a another GTP 740 right out of the box. Both units displayed the same artifacts in store, though to a lesser degree than I experienced at home. Mine was the noisier of the two by a slim margin.

And that's too bad. The unit has a lot to recommend. I most enjoyed it's warm panel display and great remote. The two channel sonics are thick and detailed in the low to mid range, with just a touch of brightness in the upper mids and highs. The switching abberations caused me such concern that I never fully auditioned the home theater or tuner capabilities of the 740.

I left the dealer with a Parasound PSP 1500 loaner for now. So in sum, 5 stars for ergonomics, 4 for two channel performance, 1 star for build quality. Overall a
disappointing...

I currently have an adcom 5503 three channel and the 5802 two channel amp with an adcom gfp-750 preamp. I believe these items to have been some of the best buys I have made. Sound GREAT!!! Going on this personal experience, I bought the gtp-740 with out a lot of comparison. Hooked it up and have had trouble with it ever since. It does a terrible job with channel seperation, tuner sucks, and it cost too much. Buyers remorse is such a pain in the @#$. Should have taken the dealers advice and got the B/K, or Theta. Heed my warning kids!!!

I should have known when I went to the dealer and he did not wantme to listen to the unit. He kept pushing me to something else.

First off in the demo, it took 20min to get the thing to work, and when it did all of 5 min it stopped again. I just shook my head and took his advise and bought the Sony.

I feel sorry for Adcom, they used to be one of my favorites

Well I revieved the reapired GTP-740 back from Adcom. It apparently suffered from a grounding problem in the amp and faceplate. Their fix appeared to work. I now have a pre-amp that doesn't sing along with the music. The turn around time was approximatley a week, but well worth it. I just wonder if perhaps someone knows if there is anyone that modifies Adcom products. Perhaps better quility internals? This could concievably make this an outstanding pre-amp.

I have owned the 740 for about 2 months and have some mixed feelings about it.First the good stuff. Listening to many pre-amps prior to the Adcom I think its sounds very good, although not quite as good as pre-amps like the Proceeds but very close..the adcom uses 2 Motorola processers (the 59000 series?) for DSP processing...whether this is the reason for the sound quality I cant say.

One day the unit refused to power up. Being a tech by trade and to avoid a trip to the dealer over possibly something simple, I took the cover off. I found a loose ground screw, tighten it up and the unit powered up ok...this is saying a little something about Adcom's quality control. But being in the tech business for over 20 years things like this sometimes happens at the manufacturing level so it did not bother me much.

Now I am getting another weird power up querk..The unit has a standby mode and a full (supposenly) off mode...If the unit is fully powered off (not in standby) for any length of time over a day, when I switch it to standby and use the remote to turn the unit on it refuses to power up. At this time I really should take it back but playing around with it again I simply unplug and plugged the power cord and the unit powers up fine from the remote (if I leave it in the standby mode which is really the normal preferred method) I have no problems powering it up..it appears that the so-called fully off is not really off, you must unplug the AC cord. Also I found when it wont power up by the remote, if I hold the power button on the remote while at the same time pressing the power button on the unit to standby it will then power up.

As far as everything else, it works. I would have like the manual to be more detailed, for example, you can choose "small or large" front left/right speakers but what is the frequency cut off in the "small" mode..The subwoofer outs appears to have no low pass filter, the manual do not say.

If it wasn't for the fact I like the way the 740 sounds, with my above power experience, I probable would have taken it back. For now, Im going to hold on to it. Oh yeah you can have this unit upgraded by Adcom to do DTS for 400 bucks, turn around is suppose to be a week which I might do if DTS really takes off in a really big way as I am totally blowned away by Dolby Digital.