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Amplifier Upgrade Decision

Hello,
I need some help/feedback with regards to upgrading my power amplifier for 2 channel music. My current set up includes following components
1. Source (Digital)- Oppo BDP-95
2. Source (Analog)- Clearaudio Concept Turntable
3. Pre-Amplifier- Parasound Halo JC-2
4. Pre-Amplifier- Parasound Halo P-7 (using the phono interface for playing the turntable)
5. Power Amplifier- Parasound Halo A-21
6. Front Speakers- Aerial Model-7T
7. Power Cable- Nordost Heimdall 2 and Red Dawn 2
8. Interconnect Cable- Nordost Frey 2, Heimdall 2 and Red Dawn 2
9. Speaker Cable- Nordost Red Dawn 2
10. Wall Receptacle- Furutech GTX-D NCF(R)
11. 2 Dedicated 20 Amp (10 AWG) circuits feeding the entire system
12. GIK Room Acoustics Bass traps/Diffusors
13. Room size- 16’ X 12’
This set up sounds good but I wanted to take it to the next level and wanted to upgrade my amplifier to a better 2 Channel amplifier or a set of mono-blocks. I love Class A/AB sound and would like to stick to this technology. My choices, not in any particular order, are
1. Upgrade to a Plinius SA 103 (125 W pure Class A per channel) and use it as a 2 channel amplifier
2. Upgrade to a set of Class-A mono-blocks. My choices, not in any particular order, are
    a. Parasound Halo JC-1
    b. Pass Labs XA-60.8
My budget is around 10-12K.

I know everything is system dependent but I would love to hear your opinion on these amplifiers before starting on product evaluation.

I am also not sure if my mono-block amplifier choices would provide significant value add from a sound perspective over the Plinius or any other good quality 2 channel amplifier at this price point. So I would love to hear your feedback on this point as well.

indranilsen
indranilsen OP
113 posts
 
Thank you guys for your feedback. Very helpful indeed. I think Halo JC-2 is very good pre-amplifier at that price point, at-lease it blended really well in my system. Previously I was using P-7 to drive Halo A-21 but upgrading the pre-amplifier to Halo JC-2 brought a huge improvement all over the audio domain. The most notable factor was the quality of bass coming out of Halo A-21 in this combination. 
I was initially thinking of getting a pair of Halo JC-1s because it is a very good amplifier and would make this transition very smooth for me. However I am willing to give Pass/Plinius a try because of the reasons that auxinput mentioned above. I am really curious to find out what this more musical/sweet (when using a pure Class A amplifier) means from a sound perspective. Any feedback on this would be very much appreciated.
Also any opinion on using a set of mono-blocks over a stereo amplifier? In theory the mono-blocks win but I wanted to hear from folks who have used both and have an opinion on this item.
 
almarg's avatar
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almarg
9,670 posts
 
The plinius/pass choices are going to be single ended amp circuits, but the full Class A may have a sweeter or more musical sound to your ears.
I'm pretty certain that the Pass XA60.8 is a fully balanced amplifier.

Regards,
-- Al
 

ricred1
2,058 posts
 
I should add, I had Aerial 7T's when I had the A21 and JC-2.
4425
861 posts
 
Your budget is so close to a listed Agostino momentum amp. One to buy and enjoy for years to come. You can also update much later to S250 or whatever is current at the time. A handmade beauty to keep for years. At under 15k it's a very good deal. Truly a buy and check off the list component. 

auxinput
2,920 posts
 
@almarg - you could be right, I just assumed because most stereo amplifiers are single ended.  Based on what I'm reading on the Plinius SA 103, the Plinius is single ended (not differential).  I'm primarily talking about the output stage.  Many stereo/mono amplifiers will have a fully differential/balanced driver stage on the input side.
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