New amp Choice

[hc_416]

Hey guys,

New to the forums and want to say hello and ask some advice. I have read some of the reviews and am impressed the comprehensive specs and testing done. With that being said, I would like to ask what would be a better buy for my system? I have a Yamaha rx a8a and really enjoy it. I had a Sunfire Grand Arc that was 425x5, but it gave out and is no longer working. At the moment I am running a simple 5.1 for home streaming/ blue ray movies, and then I do pure direct for two channel music. The front three speakers are Polk LISM, 707 l/r and 706c center. The rear surrounds are Polk rtia 12. I want to replace the Sunfire with either a two channel amp and run the rest off the Yamaha or a three channel for the front three for good voice matching and amp performance. The amps that I have been looking at are

Nord One NC500DM MKII 3 Channel​

Nord One NC500DM MKII 3 Channel | nordacoustics

The 3 Channel NC500 MKII Power Amplifier Nord REV D Input Buffer boards. 3 Hypex NCore NC500’s, 3 Hypex SMPS1200A700 PSU’s and 3 Nord REV D Input Buffer Boards Board in a true triple Mono design incorporated in a single case. Same sound quality as the Mono Blocks.

www.nordacoustics.co.uk

ATI Amplifier Technologies - AT54XNC Series​

ATI Amplifier Technologies - AT54XNC Series - Class D Power Amplifier

With advanced technology and high-quality components, the AT54XNC delivers clear, dynamic sound taking your listening experience to the next level.

soundapproach.com

These are two class d amps that seem to test well. They do have different power supply's so if any owners could chime in it would be appreciated.

MX-A5200​

MX-A5200 - Overview - Yamaha USA

Supreme Power. Engineered to deliver on power and performance, this amplifier harnesses the best in power performance that drives from a technological engineering marvel. Featuring the highest quality in components for amplifiers, pair it with the CX-A5200 AV Preamplifier Processor for the...

usa.yamaha.com

Adcom GFA-585se

ADCOM GFA-585se Power Amplifier

adcom.com

These are two class a/b I was looking at as well. I really like the at54xnc, low heat, high power, not bad looking. I am not really sure how a class d will work with my yamaha rx a8a. Also price is to be considered but I would just work a few more hours OT to get the right amp. Thanks in advance.

 

[RickSanchez]

So your Yamaha RX-A8A doesn't have enough power to drive your system (in 5.1 mode)?

 

[hc_416]

So your Yamaha RX-A8A doesn't have enough power to drive your system (in 5.1 mode)?

It sounds good at normal levels; when listening at high lvls it sounds strained. I also plan some type of speaker upgrade as well.

 

[RickSanchez]

Another amp option to consider:

Buckeye Amps

Buckeye Amps utilizes the most advanced audio amplifier technologies available. Authorized seller for Hypex and Purifi Class D amplifiers. Based in the US. Free shipping and worldwide service!

www.buckeyeamp.com

He's an ASR member. His primary build thread is here:

Buckeye Amps: New US based Hypex multichannel amplifier builder, line-up announcement!

Hypex NC502MP specs: - 450w @ 2ohm (per channel, peak) - 500w @ 4ohm (per channel, peak) - 350w @ 8ohm (per channel, peak) Hypex NC252MP specs: - 180w @ 2ohm (per channel, peak) - 250w @ 4ohm (per channel, peak) - 150w @ 8ohm (per channel, peak) PRICING: XL 8ch Aluminum Case (17"x13"x6")...

www.audiosciencereview.com

Amir has measured a couple of his amps.

• https://www.audiosciencereview.com/forum/index.php?threads/buckeye-6-channel-amplifier-review.18579/
• https://www.audiosciencereview.com/...keye-nc502mp-review-6-channel-amplifer.27607/

 

[hc_416]

I take it nobody has compared these amps, am I off kilter or should look at a different setting?

 

[hc_416]

Hey guys, just wanted to update what I got. I bought the ati amp! It is a very nice, clean sounding amp. I would also it call quick as well; the note hits then done. Very different from my sunrfire grand arc, and a8a. I am now looking at speakers. I was looking at the polk audio l800, but with this amp I can't run them. I am now looking at polk audio l600, Martian Logan xt60 and paradigm f100. I would eventually get a 5.1 setup going as well as using for 2 channel when jamming out. I would like to do a 5.2.4 when all is said and done. As of now I have a 5.1. My amp, processor and TV have been upgraded as well as gig internet for streaming and media sharing.

 

[hc_416]

Hey guys,

Just another update on my speaker journey. I purchased a monolith 13 inch, THX cert, 2000 watt amp to go with my ATI NCore amp. I am currently waiting for delivery of the sub, which should be on April 5th.

Monolith by Monoprice 13in THX Certified Ultra 2000-Watt Powered Subwoofer - Monoprice.com

Monolith™ by Monoprice™13" THX® Certified Ultra 2000‑Watt Powered SubwooferMassive Output. Low Distortion. THX® Certified.The Monolith™ 13" THX® Certified

www.monoprice.com

The ATI is very clean, clear, and precise; it also has a lot head room for my Lism 707. I do have to say the Lism go pretty well with the amp and can use all the power, which was a surprise to me. The reason I feel they go good together is the Lism are a "warm" speaker, which seems to go good with a cool/clean sounding amp. I choose to go with the 13 in mono for a few reasons. 1. I wanted a small enough woofer to keep up with music and have very deep base. The measurements from Audioholic show decay time from 30hz up to be very good and under the required 1.5 cycle min to be considered a "fast" woofer. 2. The output below 30 is a little slower but the trade off is a very high spl, design's are trade offs and I liked this one. Also a lot of the articulate bass would be a little higher in the range i.e. 50 to 100 hz, so it seems like a good to great trade off. 3. The amount of head room for movies is a real plus, my wife and I like to watch a lot of shows/movies that have Dolby in them so the sub had to be able to do double duty.

Feel free to ask me any question, I'm open for discussion or ideas how to set it up in my small room!

 

[MakeMineVinyl]

Hey guys, just wanted to update what I got. I bought the ati amp!

I can only say that you made a masterful decision!

 

[hc_416]

I forgot to mention it is all being fed by a yamaha A8A. I have had yamaha for years and like the sound, also in some distance future the a8a will get all the hdmi 2.1 features. As of now I just us arc/earc to feed it.