You are here

Log in or register to post comments
pjbialas
pjbialas's picture
Offline
Last seen: 6 years 8 months ago
Joined: Jan 17 2015 - 1:41pm
Upgrading.. is it a crime to use my old adcom amps with new pre-amp??

In short, with $1000 and my equip what would you do?

I have an adcom setup that has served me well but without HDMI inputs I have to make a change.... I really only need two HDMI inputs.. Is it a crime to buy a new mid level pre-amp and keep using my adcom amps?? will this setup outperform the 870HD below? it seems like a powerhouse... What do you think of the pre-amp options below??

I use the system for movies and music and I don't really care about wifi capabilities... just sound and pushing the la scales with enough power. I'm ok going all new separates if there is a pre-amp and amp 5.1 you would recommend under $1000 total and used is fine I like ebay...

I currently have...
Adcom gtp-830 Preamp
Adcom 7500 5.1 amp 100Wpc
Klipsch la scalas and TXH klipsh rears with 15" and 12" klipsch subs

I see a GTP-870HD Adcom on ebay for $400.. Thats what got me going because I've wanted it for years and can't believe its only $400 now! its was $2500 ten years ago..

Would it be a crime to use the below pre-amps with my current adcom, are these higher performers than the 870HD above??

Outlaw 975 or Emotiva UMC-200 on ebay 300-600

Marantz AV8801 - I've read great things about "Balanced" outputs but don't know what they are or what they do? on ebay $900

Any other ideas are welcome..

Thank you!

bierfeldt
bierfeldt's picture
Offline
Last seen: 1 month 3 weeks ago
Joined: Oct 26 2007 - 2:30pm
Thoughts

Adcom makes a fine amp and if you are happy with the way it sounds with your speakers, keep it. I have Carver amps from the mid 90s that sound awesome that I plan to get refurbed and will continue to use.

Balanced connections are XLR a connections and are regularly used in pro applications and a lot of higher end equipment. Your Adcom does not have XLR inputs so this is moot for you unless you want to get a new amp. Reality is, balanced connections don't generate the ground humm you sometimes get from a power amp and pre amp. This is driven by cheap cables. If you get a high quality RCA cable and it is short, you can avoid this issue most of the time though equipment still suffers. XLR cables never suffer from that humm regardless of wire length, even runs over 25 feet. Quality of the cable also seems to make minimal difference with XLR a cables.

Regarding the Pre/Pros you mentioned above, both the Emotiva and the Outlaw are quality products that have HDMI inputs and Dolby TrueHD. I am not sure how the room correction is on those and whether it is a quality version of Audyssey do their equivalent. The Marantz you mentioned has way more features than you seem to want or need and the Emotiva and Outlaw units are not in the same league.

I have a Marantz AV7005 which was their pre/pro from about 4 years ago. It has a great version of Audyssey, superb video processing and the ability to adjust the interface via your network and some other features that I like a lot. You might be able to find a refurb off from accessories4less or a used unit off of Audiogon. It will do everything you need.

The only other thing you need is great cables regardless of the unit you pick. Audioquest makes great ones.

Good luck to you

pjbialas
pjbialas's picture
Offline
Last seen: 6 years 8 months ago
Joined: Jan 17 2015 - 1:41pm
Re: Thoughts

Thank you for your reply.. I do notice a slight fuzz or hiss sound all the time from my speakers and have always wanted it to go away... think this is the cables like you mentioned? Also I see the 7005 on ebay for $599.. maybe I'll just pair it up with the adcom? thanks so much for your thoughts

Also why might you say no to the adcom 870HD? over the 7005? Thanks

bierfeldt
bierfeldt's picture
Offline
Last seen: 1 month 3 weeks ago
Joined: Oct 26 2007 - 2:30pm
The Adcom is quite a bit older

The Adcom lacks Audyssey room correction which makes way more difference that you would think. These dynamic EQs automatically adjust levels and optimize 5 channel sound for your room. Additionally, the Adcom doesn't support Dolby True HD or DTS HD.

The one strike against the suggested Marantz AV7005 is that it doesn't support 2 subwoofers. That would be the biggest advantage of one of the newer Marantz Pre/pros like the AV7701. I would check accesories4less and see if a less expensive refurb might be available.

Regarding the humm, it is possible that your cables are driving it. You can try upgrading to Audioquest or Kinder or Acoustic Zen cables. They may eliminate that humm. Alternatively, it just might be the nature of that amplifier. This is tough because you can spend $200-$300 or more on new cables and it might not make much of difference. A Marantz MM7055 is 140w 5 channel balanced amp. I think you can get a refurb for $549 from accesories4less which is Marantz's clearing house for discontinued and refurb items. I have my AV7005 paired with an older version of that Marantz power amp and it sounds great.

pjbialas
pjbialas's picture
Offline
Last seen: 6 years 8 months ago
Joined: Jan 17 2015 - 1:41pm
THANK YOU

I really appreciate your time and reply, I'll be buying an AV7005, then if I'm still getting static I'll go with the MM7055. As for the 2 subwoofers, I'm happy to just link the 2 together off one output and save the money. I'm also watching a grand sun fire 200w x 5 amp, but I'll defer to your recommendation for nearly the same price. Again, thank you for your time, I am very appreciative for your help! Cheers!

bierfeldt
bierfeldt's picture
Offline
Last seen: 1 month 3 weeks ago
Joined: Oct 26 2007 - 2:30pm
I am considering replacing my Marantz with a Sunfire

the Cinema Grand is wonderful power amp with double the output of the Marantz. I have low sensitivity speakers and am under powering mine a touch which is why I am thinking about the Sunfire. It sounds fantastic and should have balance inputs. For the money it is a fabulous power amp and I would take it over a Marantz any day.

If you have any questions about the AV7005 after you get it, let me know. I am obviously extremely familiar with it and I am not sure if the instruction manual could have been more poorly written and I use just about every feature that it has to offer.

pjbialas
pjbialas's picture
Offline
Last seen: 6 years 8 months ago
Joined: Jan 17 2015 - 1:41pm
I bought the AV7005 Thanks!

I picked up a used AV7005 and am looking forward to the new set up! Thanks for the help!

  • X