NAD C 399amplifierfeedsKEF R7speaker
Used together in 1 real system
Strong match
NAD C 399 + KEF R7 is a strong match — the C 399 has the headroom to drive the R7 cleanly.
What the compatibility check found
Impedance Matching
Pass✓ Amplifier can safely drive 8Ω speakers
Power Matching
Pass✓ Amplifier power (180W @ 8Ω) is well-matched for speaker sensitivity (88dB)
Physical Connectivity
Couldn't verify
Power and headroom
- Headroom
- 16 dB
- in reserve
- Peak SPL
- 101 dB
- at the seat
- Power used
- 4.51 W
- at target level
- Of amp output
- 2.5%
- capacity used
Estimated at an 85 dB listening level, 3 m from the speakers.