DS Audio DS-E3 photo-electric pick-up Lab Report

In practice, while DS Audio’s ‘third generation’ mechanism brings the DS-E3 some of the benefits over the DS-E1 [HFN May ’19] we saw in the Master 3 [HFN Jan ’24], other features of its performance are inescapably linked to the retention of a basic crimped alloy cantilever and elliptical stylus. So, despite the compliance being slightly ‘stiffened’ from 15cu to 11cu, tracking has improved slightly further over the DS-E1, with the DS-E3 clearing the maximum 80µm groove pitch on both channels and the most severe +18dB modulation (315Hz lateral cut, re. 11.2μm) at just 0.65% THD. How? Because the recommended tracking force has increased from 1.7g to 2.1g! VTA is now slightly more accurate too at 22°. One of the real benefits of the DS-E3’s ‘dual mono’ optical path is improved stereo separation – a full 35dB midband here – although, for whatever reason, channel balance was a poorer 0.9dB in our sample. The 790mV output from the DS-E3 EQ unit is not far off that of the DS-E1 EQ.

Another benefit of the ‘Gen 3’s’ reduced moving mass is a deferment of the inevitable cantilever resonance at ~12-13kHz (DS-E1) to ~15-16kHz here [see Graph 1] leading to a +6.5dB treble peak. Note the impressive symmetry between lateral [black], vertical [red] and stereo [dotted] responses, and also the reduced bass boost of the Output 1 and 2 options – a sensible update on DS Audio’s part. Distortion [see Graph 2] necessarily reflects the response trend with, again, excellent L+R and L-R symmetry – a boon to 3D soundstaging – and a low of just 0.3% (re. –8dB re. 5cm/sec) through bass and midrange before hitting 9%/8kHz where the 2nd harmonic meets the response peak. PM

ABOVE: Frequency response curves (–8dB re. 5cm/sec) lateral (L+R, black) vs. vertical (L–R, red) vs. stereo (Output 1, dotted; Output 2, dashed)

ABOVE: Lateral (L+R, black), vertical (L–R, red), stereo (dashed) tracing and generator distortion (2nd-4th harms) vs. freq. from 20Hz-20kHz (–8dB re. 5cm/sec)

Hi-Fi News Measured Specifications:

Generator type/weight Photo-optical / 7.7g
Recommended tracking force 20-22mN (21mN)
Sensitivity/balance (re. 5cm/sec) 790mV / 0.9dB (from Eq unit)
Compliance (vertical/lateral) 11cu / 15cu
Vertical tracking angle 22 degrees
L/R Tracking ability 80μm / 80μm
L/R Distortion (–8dB, 20Hz-20kHz) 0.9-12.7% / 0.3-9.1%
L/R Frequency resp. (20Hz-20kHz) +2.7dB to –4.4dB/–2.1dB to +6.8dB
Stereo separation (1kHz / 20kHz) 35dB / 18dB
COMPANY INFO
Digital Stream Corporation
Kanagawa, Japan
Supplied by: Soundfowndations Ltd, Berks
Telephone: 0118 9814238
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