Newegg acts as an intermediary for a bunch of Yaqin's from China. I wonder if you went up their line whether you might find better bass. Or if by doing so you might compromise the qualities you like so much.
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The reviewer here, seemed to be pleased as you:
Looks like you may even be surprised rolling the driver tubes with some decent(not pricey)NOS tubes, if your looking for a little audio excitement.
No mention of a power cord swap, but perhaps another area waiting for an upgrade?
I have had a couple of Yaqin amps, excellent value and very nice sounding. As mentioned, you may try different tubes. Mine responded well to tube changes. I have recommended Yaqin at least once hear on Agon, seemed to fall on deaf ears. I'm not using Yaqin now, but wouldn't blink at trying any of their amps or pre's.
I started my journey into tubes years ago with a Yaqin Tube Buffer,then Yaqin Tube integrated amp and now have downsized to a magnificent Quad AV-One..I could NEVER go back to SS...In my experience if your going to have a problem with a tube amp due to poor quality control it’s going to happen sooner rather than years down the road...Also as mentioned the factory Shaguang power tubes are not the best available..Try a set of the Re Issue Mullard or Genelex tubes.You can get Platinum Matched quads for less than $100.00 on Ebay...The Yaqin uses really good Japanese Steel transformers so I wouldn’t expect loose bass but I seem to remember mine responded really well to a power cable upgrade(nothing crazy though)...You could always sell the SS gear AND the Yaqin and look at something from Raven Audio,Rogue Audio,Cary Audio,Conrad Johnson or PrimaLuna...These amps are built to last a lifetime(with periodic tube replacement) and I’ve never read a word about anyone hearing loose bass in their systems...
Hi boisty,right now using Dynaudio Excite X14’s...They sound pretty amazing with the Quad.Imaging and Staging is wide and deep,mids are sublime and treble beautifully extended without harshness.They only lack deeper bass and better presence at VERY low listening levels to be fantastic all arounders...I am looking at trying either a set of Spatial Audio M4 TS’s or Reference 3A De Capo BE’s to see what higher up the food chain gets me...
On the AV-One with only about 30 hours on it I just can't say enough good about it.Coming from the iFi Stereo 50 amp/dac build quality is on another level,sumptuous comes to mind.It feels like an amp that will last several lifetimes.Sound/build and value are off the charts on this amp and that is with factory tubes!
Hi Freediver thanks for the detailed response. Funny as I am using Spatial M2 Turbos at the momemt and was interested in hearing them with the Quad. Hope to check that out soon. If I get the chance will let you know my thoughts. Currently using a Denon digital amp and I‘m looking to go back to tubes and the Quad caught my eye. Thanks again!
No these are integrated amplifiers,all in 1 units..If you need tube mono blocks or bridged tube amps I suggest a new thread in the Amplifier section.
And since you brought this thread back a quick update.Sold VA-one,have Cayin CA55 running off Micromega MyDac driving Harbeth M30.1 Ebony speakers & am pretty much off the merry go round until I save another $8000.00 to upgrade speakers to Harbeth 40.2's!