Need help fast - Unbalanced Preamp to Balanced Amp

Hi Mitch -- Assuming you are referring to the LAMM LL2 Deluxe, you've most probably seen JA's measurements, which indicate an output impedance rising to 3.3K at 20Hz. A phone call to Jensen sounds like it would be in order, to ask them what effects that would have.

Best regards,
-- Al

Mitch2, my advice if you look for a preamp is look for one that is fully differential and balanced internally, not just at the inputs or outputs. If it is built right, the length or quality of the interconnect will be of no consequence.

Hi guys, interesting thread, but since I don't understand most of the the tech stuff in the links posted above re jensen transformers, could any of you guys tell me what would be the best way to connect the BALANCED output of my CDP (Simaudio Moon Eclipse) to the UNBALANCED input of my preamp (Hovland HP100)? The CDP also have unbalanced outputs that I'm currently using, but the manual states that the balanced ones sound better, would this arrangement take advantage of these sonic benefits?
Thank you all,
Marco

If your amplifier does not accept balanced inputs, it won't help to run a balanced cable that then uses an adapter to convert to single ended.

FWIW though your amplifier can easily be modified without changing any of the circuit design to accept a balanced input. We have been doing this mod for a while- its very simple and there are no transformers involved.

Thank you Atmasphere, can you tell me more about this mod?
As I'm in Europe, I just need to know what to say to a local technician, I wouldn't understand the details anyway.