[Tube Preamp][Need Help]Could you suggest a tube preamp matched with a SS AMP?

Must say that @decooney  asks a good question and makes a good point. At the moment I am at a loss for options. 

The M504 is a good amp. The low input impedance does represent a load for most tube preamps however.  Not sure about the Schiit preamps having the required output impedance to serve. 

Aric Audio makes his preamps with adjustable gain. This allows his pre’s to work with most amps. No affiliation,just a very satisfied customer.  http://aricaudio.com/

Hi @decooney , thank you for your reply and advice.

I like the Onkyo combo. I think I could get along with them for a long time.

The thought about trying TUBE preamp or TUBE integrated amplifier started from the Melos CDD-2 & Melos MAX-3 (analog processor, I think it's a DAC). The max-3 has a 6922 tube inside. I compared this "tube" DAC with the RME ADI-2 DAC. It has something I like. Soft and warm sound, the details more clearly, and I am feeling the sound around me.

That's why I want to try TUBE preamp or TUBE integrated amplifier. Based on the advices by everyone posted to help me, I think integrated amplifier is a good idea. But Maybe $1000 not enough I think. For a NOT BAD tube integrated amplifier.

Mmmm. 

Thank you again. And all guys, good night!

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@rocray Yes, Aric make several tube preamps. They also have low (for tube) output impedance. My Special has output impedance of 200 ohms across frequency range. He makes one called the Unlimited which in basic form retails for ~$1600 I believe. I think highly of Aric and his products. I also own his Transcend amplifier which I have in rotation with a Pass XA25.

@princeliebe I have been toying with suggesting you look up Aric Audio and thereafter reach out to him. He just might have an answer for your needs.  I was hesitant due to your budget.