My Bricasti M12 is unable to drive my Nagra 300p amp. Even at max volume of +8dB, the loudness in the room barely reaches 85dB.
Would love some advice from the audio gurus before I give up on my Bricasti M12.
My speakers are Devore O96 which can be easily driven by 8W SET amps, leave alone a 20W Push pull amp like Nagra 300p.
It has something to do with gain of the preamp. Impedance matching seems to be fine.
Bricasti m12 preamp/DAC specs:
Balanced Analog Outputs
Connectors: XLR balanced (pin 2 hot)
Impedance: 40 ohm
Output: @ full scale ( +8db front panel )+16.5 dbm (5.2V RMS)
D/A Conversion: PCM 24 bit delta sigma 8x oversampling, DSD direct 1 bit
Frequency Response @44.1k: 10 hz- 20 kHz +0dB, -.2 dB
Dynamic Range: >120dB A-Weighted
THD+N @ 1k: .0008% @ 0dBfs / .0004% @-30dbfs
Unbalanced Analog Outputs
Connectors: RCA
Impedance: 40 ohm
Output level: Full scale ( +8db front panel ) = +10.7 dbm (2.6 V RMS)
D/A Conversion: PCM 24 bit delta sigma 8x oversampling, DSD direct 1 bit
Frequency Response @ 44.1k: 10 hz- 20 kHz -.2 dB
Dynamic Range: >120dB A-Weighted
THD+N @ 1k: .0008% @ 0dbfs / .0004% @-30dbfs
Nagra 300P specs:
2 x 20 watts RMS stereo into 4, 8 and 16 Ω
14 Hz at 56 kHz, +0/-3 dB
> 70 dB
Typically 105 dB (ASA-A weighted)
0.8% @ 20 W
> 48 kΩ
«Soft start» circuit
Incorrect mains voltage (115V or 230V)
Output transformer removed
Error in tube anode current <15mA or >180mA
120 W continuous, <1 W stand-by
100, 115, 230 V ± 10%, 50-60 Hz
