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Onix SP3 (aka Melody) - SS vs Tube Watts Question

kermit_xc

Active Member
The short:
My new-to-me tube amp, integrated Onix SP3 37W sounds better with my B&W 801 speakers than two MC-7270 540w in bridged mono setup

The long:
Back in a day my only exposure to tubes was a Bellari Phono stage and a Yaqin MC-13 - I liked it, but honestly I didn't really care that much for the heat - and with kids on the way, ADCOM 545 was a much better choice

Now fast forward few years where I scored a mint pair of B&W 801s (original from 1985). To no surprise of mine, the trusty HK-930 was struggling to power my "new" speakers (86dB and with endless power needs) I ended up splurging on a MC-7270 which was quickly followed by a second MC-7270 to run in bridged mono.

Super happy, perfect combo and 540watts per speakers - yay! future proof setup.

Alright, so last week I see a Onix SP3 on local craigslist (major case of memory lane trip back from when I trusted Mark Shifty and his AV123 with my cash in late 2000s)

I took it home and for shits plugged my 801s into it - this amp is rated at 37wpc, I expected literally nothing - but WOW, way more than enough volume and I'm either super confused/biased (pun un-intented) but the bass actually sound better than with bridged 2 MC-7270.

The question:
So what is happening here ??? We are talking MC-7270 with 540W against 37W on the Onix Tube Amp.
 
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This has been chewed on before so I will just say that watts are watts, tube or solid state. They are the same. Basically it has to do with speaker efficiency and amplifier headroom. Others will probably chime in to take this further.
 
I'm guessing you are realizing the tube goodness. Despite all of the prior 'chewing'. That Onix (melody) is a pretty nice amp.
 
The speakers impedance curve is pretty wild with 3 peaks topping 14 to 20 ohms each along with valleys dipping down below 3 ohms. That kind of impedance variation is going to interact with an amp in somewhat unpredictable ways. I think you simply find the interactions on the tube amp more pleasing then on the solid state. You are for sure driving the tube amp much harder then the solid states, but that is not all there is to matching amp and speakers.

Use the ones you like.

Shelly_D
 
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