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Genelec with tube preamp - impedance match?

radlux, modified 2 Years ago.

Genelec with tube preamp - impedance match?

Youngling Posts: 3 Join Date: 12/19/16 Recent Posts


I have a pair of 8040 Genelecs that I am no longer using for mixing because I now have the 8331. I plan to move the 8040 for casual music listening in my bedroom. I have a Bakert Labs Rhumba 1.2 active tube preamp. I would like to use it in the following way:

Dac->XLR->Bakert preamp->XLR->8040.

I hope to add a bit of deliberate tube harmonic distortion which I feel pleasurable for my personal taste for non critical listening. It will also allow me to conviniently adjust volume. My questions are:

The preamp has low output impedence - 75ohms. What is the input impedance of the power amp in the 8040? Will this match OK with my preamp? My understanding is that  for proper matching preamps to power amps, a general rule of thumb is for the load (amp) input impedance to be at least 10 times higher than the source (preamp) output impedance to provide a suitably flat frequency response.
2. The preamp has a Low gain of 7db. Most active preamps have gains of around 12-20db. Will this work OK if I keep the sensitivity on the 8040 to - 6db?

3. Will I cause any damage to the 8040 by connecting hifi preamps in general? Is there anything to watch out for? 

I haven't seen anyone talk about this rather non traditional use of studio monitors. Look forward to your responses.




radlux, modified 2 Years ago.

RE: Genelec with tube preamp - impedance match?

Youngling Posts: 3 Join Date: 12/19/16 Recent Posts

This is the link to the active tube preamp:

lukester, modified 2 Years ago.

RE: Genelec with tube preamp - impedance match?

Jedi Master Posts: 296 Join Date: 4/22/10 Recent Posts

Can't answer #1 and 2.

Can answer #3: No. Njet. 沒有.

I do think that your preamp is slightly overkill at 4x price os speakers.

A 4.000$ preamp followed by a 10$ potentiometer in the Genelcs is a bit odd. Not to diss Genelec design.

I looked into tube options too a few years back, found that high end people build huge preamps and then forget to put in a bypass switch for the tube section.

Hope you can test the gear before you buy it. You might not get your money's worth,
​​​​​​​At least that was the feeling I walked away with, and I fed huge 1037s that should lend themselves way better to such high-end shenanigans.
If you find that you do get your money's worth, please come back and tell us!