Audio reserch reference 3....driving Nagra VPA amp

Hi, you might check with user elberoth2. I think he had VPA's at one point and now has a ARC ref 3/110.

I could be wrong here...

I have heard the VPA's many times at my dealer. The are great amps. What speakers will they mate with?

Hello Nick , just be sure the input impedance of the Nagra is 100kOhm or more to get full profit of the lower frequencies .Unfort.the side of Nagra did not tell the info about the input.ARC will tell you why the input imp.of the poweramp should be more than 100 kOhm.
Greetings Hans

The Nagra has input impedence an sensivity below:

Input sensitivity: 400mV for maximum power. Input impedance: 100k ohms

the reference 3' output below:
OUTPUT IMPEDANCE: 600 ohms Balanced, 300 ohms SE main (2), 20K ohms minimum load and 2000pF maximum capacitance

The Nagra has only Balanced in's and thats the way i want to drive them trough the reference 3, so basicaly 600 Ohms in balanced mode for the output.
I want to drive a pair of TAD horn speakers, 2 15" woofers with a compression loaded 2" horn.
Their Nominal impedence is 4 Ohm's and the sensivity rated at 98Db.