+1 @fuzztone @atmasphere and will add it’d also be helpful to find your speaker’s minimum impedance and at what frequency at which it occurs. I think you should go mono because a 20Wpc amp will likely strain to drive the speakers, and pushing an amp to near its limits is never good for optimal performance. Hope this helps.
preamp & amp compatibility
I'm hoping someone can look at the attached specifications for my dac/pre and tell me if the AMP spec's will be compatible with the dac/pre from a purely math perspective. I listen at medium volume levels and the speakers are Three-way, floorstanding, reflex-loaded dynamic loudspeaker. Drive-units: 1" (25mm) soft-dome tweeter, two 7" (175mm) carbon-fiber bass/mid units (each with 1.25" voice-coil). Crossover frequencies: 500Hz, 3kHz. Crossover slopes: 12dB/octave, 18dB/octave, 18dB/octave. Frequency response: 40Hz-25kHz, ±3dB. Sensitivity: 88dB/2.83V/m. Nominal impedance: 8 ohms.
POWER AMP SPECIFICATIONS: Power Output: Stereo, 8 Ohms: 20W RMS per channel Stereo, 4 Ohms: 40W RMS per channel Mono, 8 ohms: 80W RMS Frequency Response: 20Hz-20Khz, -0.1db, 3Hz-500KHz, -3dB THD: 112db, A-weighted, referenced to full output Damping Factor: >100 into 8 ohms, 20-20kHz Gain: 12 (22dB) Input Sensitivity: AKA Rated Output (Vrms)/Rated Gain. Or, 14.3/12. You do the math. Input Impedance: 22k ohms SE, 44k ohms balanced Crosstalk: >95dB, 20-20kHz
DAC / PREAMP Performance Specifications
| Specification | XLR Output | RCA Output |
| Output Level | 4±0.4 Vrms | 2±0.2 Vrms |
| Frequency Response | 20 Hz - 160 kHz (+0/-2.4 dB) 20 Hz - 20 kHz (+0/-0.04 dB) |
20 Hz - 160 kHz (+0/-2.4 dB) 20 Hz - 20 kHz (+0/-0.04 dB) |
| THD+N at 1 kHz (A Weight, 20 Hz- 20 kHz) | < -115 dB | < -115 dB |
| Channel Separation | > 120 dB | > 120 dB |
| Signal-to-Noise Ratio (A Weight, 20 Hz- 20 kHz) |
> 120 dB | > 120 dB |
| Dynamic Range (1 kHz -60 dBFS, A Weight, 20 Hz- 20 kHz) |
> 120 dB | > 120 dB |
Thanks Much,