Vertere DG-1 Dynamic Groove Turntable Package Lab Report

Lab Report

Whatever the pros and cons of the arm by incorporating the cartridge leads as flat, flying PCB conductors within the laminate, Vertere has reduced hum pick-up to below –61dB (re. 5cm/sec). The brass/stainless bearing, with tungsten ball, is put under minimal strain by the lightweight cork/alloy/polymer platter and this is reflected in the hearteningly low –73dB rumble, increasing marginally to –72.2dB through the vinyl groove (DIN-B wtd, re. 5cm/sec). These are class-leading results for a sub-£3k deck even if the speed stability is marginally less impressive. Start-up is a swift 3-4secs, absolute speed is almost bang on the money at just –0.03% and peak-wtd wow acceptable at 0.4%, but higher-rate flutter variations appear at ±15Hz, ±19Hz and ±23Hz and amount to 0.6% [see Graph 1, below]. This same cluster of peaks is also visible on the unweighted rumble spectrum [not shown here].

In common with EAT's flat Kevlar tonearm [HFN Jan '12] Vertere's laminated version trades the beam resonances of conventional tubes for its own unique set of bending modes, further complicated here by the three-way 'split' in its construction. The main 'springboard' mode occurs clearly enough at 150Hz with other modes at 280Hz, 375Hz and 420Hz [see Graph 2, below]. Clearly this laminate does exhibit bending (flexing) and higher frequency torsional (twisting) modes from 700Hz-2kHz, but they are evidently high-Q and rapidly damped. Finally, the twisted nylon thread 'bearings' necessarily have a degree of 'play' (movement) but are also free of chatter and have very low levels of stiction/friction (typically <10g in both planes). PM


Wow and flutter re. 3150Hz tone at 5cm/sec (plotted ±150Hz, 5Hz per minor division)


Cumulative tonearm resonant decay spectrum, illustrating various bearing, pillar and 'tube' vibration modes spanning 100Hz-10kHz over 40msec

Turntable speed error at 33.33rpm 33.32rpm (–0.03%)
Time to audible stabilisation 4sec
Peak Wow/Flutter 0.04% / 0.06%
Rumble (silent groove, DIN B wtd) –72.2dB
Rumble (through bearing, DIN B wtd) –73.0dB
Hum & Noise (unwtd, rel. to 5cm/sec) –61.0dB
Power Consumption 4W (<1W idle)
Dimensions (WHD, with lid) / Weight 469x130x384mm / 8kg
Price (with arm/cartridge) £2850

Vertere Ltd
Supplied by: Vertere Ltd
0203 176 4888