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Coda #8, Pass XA25, or Schiit Tyr to replace PS Audio M700

I recently upgraded my power amp from a Nakamichi PA7Aii to PS Audio M700 monoblocks.  I honestly expected to flip the M700 pair quickly because I did not think they would be better than the PA7Aii.  The M700s actually provide a wider and more detailed soundstage.  I sold the Nak.

I listen (often passively) for several hours each day.  I began to identify a 'shrill' on the high end.  Since I had upgraded my DAC (DirectStream Mk1) I initially thought that could be it.  I rotated three DACs through the system (DS, N130, and Eversolo DMP-A6).  All of them had the shrill.  I then put in an old NAD 7600 and the shrill went away along with a lot of the detail.  Put the M700 back in and used the EQ from the DMP-A6 streamer to limit extreme high end.  Ended up with a -1 Q starting at 19,500 Hz that solved the shrill, but also muddied the high end detail.  I don't trust the EQ a lot and figure more is being impacted than the targeted range.

This led me to consider upgrading the M700 pair.  I have a  pair of Acoustat 1+1 speakers with low sensitivity efficiency (81 to 86 depending on who the source is) with a pair of Rythmik F12SE subs and an active crossover at 100 Hz controlled by the SPL Crossover.  My budget is around $6K.

Looked at the Pass XA25.  Not certain there is enough power there although a Pass representative encouraged my to try it.  I was hoping to get two used and use them as mono blocks.  

The Schiit Tyr has been on my short list for awhile (prior to buying the M700).  The Schiit AI tool actually stated the Tyr was not a good match and suggested other Schiit amps.  This seemed strange to me.  I sent an email to Schiit seeking clarification, but have not heard back.  I may go to there store in LA this week to talk to someone live.  

The Coda #8 came up as an option as I was exploring.  I looked at other Coda used products, but #8 seems to match up best. (Well, the #16 matched up best, but was more than double my budget).  I will go take a look at it later this week.  Not a mono block but could work.

I am essentially seeking the last 1-2% of the detail the Acoustats can provide.  Any suggestions would be greatly appreciated.

One final note.  I am not interested in tube power amps.  I don't like the fussiness of tubes and the Acoustats seem to pick up the hum from tubes. I know it shouldn't happen with their sensitivity, but I notice it.  It could be my prejudice, but please no tube suggestions.

thriftyaudio
thriftyaudio OP
40 posts
 

@deep_333 I take it you like Schiit!

They sounded great, but the Schiit team has some concern regarding how the Tyr would match with system.  They actually believe the Vidar, used as mono blocks, would be a better option.  I was concerned the Vidar did not have enough umph. 

I brought the Tyr mono blocks home to see how they sound in my system.  If for some reason they struggle with the high end Ohm (0.5ohm) challenges then I will return them and give the Vidar a look.

I am now fairly certain the M700s are struggling with the 0.5ohm above 17000Hz.  The Nakamichi and the NAD did not struggle with it.  I do believe the 40 watt Luxman struggled with the same issue, but it was in a small room played at low to mid levels.  I didn't know what I didn't know.

So I get to play with the Tyrs for the next week or two.  I hope I love them.

eugene81
270 posts
 

I think we heard the same things from the #8.  Techno is a funny and accurate way to describe it.  In the context of today, it sounds like AI generated instruments. 😄

mbmi's avatar
mbmi
572 posts
 

I have never read a bad BELLES review.....I own the Ares and it is a Very Musical amp.....Call Dave Belles in Rochester, NY. (POWER MODULES)

helomech
1,698 posts
 

FWIW, I have owned both the Pass XA25 (two of them) and the Coda No.8 (V1). In my system the Coda was wholly superior to the XA25, especially in dynamic capability.

However, that said, I ultimately preferred the original Parasound A21 (not Plus which is actually inferior) to both of those amps. The Coda manages a little more detail and refinement than the A21, but the latter manages to drive my mid-efficiency speakers more effortlessly. There is level of dynamic ease and breadth to the A21 that I couldn’t get from the Coda. I did reach out to Doug about having the No.8 boosted to a V2 or V3 for the higher wattage (apparently the V1 outputs the most current of them), but he didn’t think I’d notice a difference unless my speakers were an 8-ohm nominal load. So I sold the Coda and bought an original Parasound A21 for the second time. I’ve been very pleased with the decision, especially when I am powering my Magnepan .7s.

My main speakers are Philharmonic BMR Towers and my front end is the Eversolo DMP-A8 streamer. The Eversolo helps to make up for the lack of treble energy the Parasound otherwise has with less transparent preamps/streamers. I consider myself a picky listener, yet I am very pleased with the synergy of this combo.

P.S. I felt the Pass and Coda also leaned warm, so they too benefit from a very transparent front end.

If decay is what you’re seeking and didn’t feel the Coda you auditioned managed enough decay, you might want to consider the Yamaha M-5000. It’s capable of exceptional decay IME, which I believe is largely attributable to its MOSFET transistors.

ryanhere
12 posts
 

Check out the Musical Fidelity M6si500.

Class A/B and 500W @8 ohms

Dual mono configure weighing in at 30KGS.

Fantastic bang for the buck IMHO

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