Integrated Amplifiers

Just as the Class A/B output stage of the Marantz Model 40n [HFN Apr ’22] was derived from that used in the PM8006 [HFN Sep ’18], this latest Model 60n – superseding the PM7000N – benefits from some trickledown of its own. Rated at 60W/8ohm (rather than the 40n’s 70W/8ohm), it still delivers 2x81W/8ohm and 2x128W/4ohm with the capacity for 108W, 190W, 290W and 347W into 8, 4, 2 and 1ohm loads under dynamic conditions [see Graph 1, below]. In practice, the maximum 18.6A current delivery is identical to that of the costlier Model 40n. Overall gain is +40.4dB and the ’60n enjoys a wider 95.0dB A-wtd S/N ratio (re. 0dBW, vs. 93.4dB for the ’40n and 85.6dB for the PM8006) together with low 0.0007-0.006% distortion (re. 20Hz-20kHz, 10W/8ohm). The Model 60n’s output impedance is a fairly flat 0.03-0.05ohm (20Hz-20kHz) while its response holds to ±0.02dB (also 20Hz-20kHz) and –0.4dB/100kHz.

The performance of the ’60n’s digital stage is determined, in part, by Marantz’s own HDAM SA3 line stage and choice of ESS’s tried-and-tested ES9018K2M DAC with inbuilt ‘Slow’ linear phase digital filter (there’s no ‘Marantz Musical Digital Filtering’ here). Jitter is fabulously low at <5psec (‘Wide’ or ‘Narrow’ lock mode), the A-wtd S/N is an impressive 106dB (via pre out re. 2V) and THD is very low at a minimum of 0.0003% (20Hz-20kHz) over the top 20dB of its dynamic range [see Graph 2]. Stopband rejection is limited at just –6dB – a trade off within the chosen filter for much reduced time domain distortion – just as there’s an early treble roll-off amounting to –4.1dB/20kHz, –5.7dB/45kHz and –8.0dB/90kHz with 48kHz, 96kHz and 192kHz media, respectively. This is a good choice for higher sample rate files. PM

Hi-Fi News Measured Specifications:

Power output (<1% THD, 8/4ohm)	81W / 128W
Dynamic power (<1% THD, 8/4/2/1ohm)	108W / 190W / 290W / 347W
Output imp. (20Hz–20kHz/100kHz)	515-521ohm / 0.033-0.045ohm
Frequency resp. (20Hz–20kHz/100kHz)	+0.0dB to –0.02dB/–0.37dB
Digital jitter (48kHz / 96kHz)	<5psec / 7psec
A-wtd S/N ratio (DAC/Amp, 0dBW)	106.2dB / 95.0dB
Distortion (DAC, 0dBFs/Amp, 10W)	0.0004-0.0005%/0.0007-0.006%
Power consumption (Idle/Rated o/p)	44W / 245W (1W standby)
Dimensions (WHD) / Weight	442x129x431mm / 12.7kg