vicol audio
 

AUDIO TUNING: NAIM CD5



Transport: Philips VAM1205; DAC: TDA1305T

A look inside NAIM CD5
Below picture present NAIM CD5 player factory default, without any modifications - left picture, and fully modified - right picture.

original Naim CD5modified Naim CD5


Output stage and FTJ before and after modifications.
OPA604 replaced with LME49710NA, decoupled with Rubycon ZL series. Output tantal caps removed and replaced with Panasonic AM

NAIM output stage output stage after modifications

Tantal caps removed from signal path and replaced with Panasonic AM + styroflex.

Panasonic AM output caps


SAA7324 decoupled with oscon . Ceramic Z5U and X7R capacitors removed and replaced with silver-mica.

SAA7376GC dac, dsp and oscillator modified

ESR measurement - Comparing original tantalum capacitor ESR (left) with Rubycon ZL ESR (right).
Rubycon ESR is more than 50 times better. Using Rubycon ZL in digital decoupling bring important noise and jitter reduction.

tantalum ESRRubycon ESR

Pierce oscillator removed together with 74HC04 and replaced with ultra low jitter Tentlabs.

Default NaimCD5 Oscillator Tentlabs low jitter oscillator

Focus and tracking was improved by decoupling TDA1302T with Rubycon ZL

Focus and tracking VAM1205

China components !!!TDA1302T decoupled with Rubycon ZL

Power supply before & after modifications

Rectifier power supply diodes replaced with CREE silicon-carbide Schottky zero recovery diodes.

original rectifiers Silicon Carbide rectifiers


Presented modification
for NAIM5 is 300euro.
Please address your inquires to sales [at] vicol-audio [dot] ro (replace [at] with @).