Should I replace ARC D130 for Bryston 4B-ST?


I am running my Sony XA-7ES straight into the ARC D130 using the digital volume control of the Sony. My speakers are Sonus Faber Grand Pianos(not HOMES) and using Nordost Blue Heaven speaker cables.

I am satisfied with my current system but feel that the ARC D130 is lacking in the bass department (bottom end sounded loose and doesn't go too deep) and the highs are not too extended.

Do you think I should go for the 4B-ST? I was mainly aiming to get a more 'lively' sound and better bass with the Bryston.

Please advice as I have found a unit in the used market and it's just a matter of time before I buy it from the seller.

Also, do you think by getting a dedicated preamp like the BP-25 the sound will be further improved? I only listen to CD's and nothing else so I didn't consider getting a preamp at the moment. Will getting a dedicated preamp yield better results than running the CD player straight to the power amp?
ryder
the arc 100.2 is great, as are several mac tube amps...but for 2g's its hard to beat a bryston in the bass dept...its also a good all-rounder.
In most all systems a great pre is always better than going straight to the amp with a cd player's volume control. Then think about whatever amp.
Thanks for all your responses. Most likely I will get the Bryston.

I am well aware that the ARC D130 will be better in the upper mids but I'm willing to sacrifice that for a livelier sound, more controlled bottom end and extended highs(although some would say it as splashy treble with the Bryston). It's just that I prefer a more upfront sound.

As for the ARC 100.2, I do know that they are very good amps and certainly a marked improvement over the ARC D130, and probably better than the Bryston. But my concern is that a new unit of the 100.2 cost twice as much (or more) than a used 4B-ST. I'm a poor audio enthusiast so I have to make do with the Bryston....for now.

Well that's all folks. Looks like I still have to get a preamp and there's no way going round this one, and thanks for your advice Marakanetz on Bryston preamps. Nearly got one early last month but rejected the deal since it's black in colour(I wanted a silver one!).