So as a general rule of thumb, get the physically largest capacitor you can that is practicable for your electrical specification needs.
This is part of it ...
On audio DIY forums/blogs, a somewhat popular project is to mod low-cost (but otherwise high-performance Asian DAPs [aka digital audio players, like iPods] **)
Below is a stock (unmodded) PCB from a decent-sounding DAP by Chinese manuf Teclast:
And after a bit of experimenting -- via o'scoping, listening tests and other metric--some modders on a Russian electronics DIY audio forum made some changes that apparently improve both objective (measurable) and subjective (listening test) performance (of interest to this EEVblog topic are the cap mods. SORRY: the image below is 180-degrees opposite from above):
** Not all Chinese products are "Wung Hun Lo". There are quite a few high-performance brands that do not make it to USA/Europe/Australia mass-market stores, but that one can on eBay or even Amazon.
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FYI, Russian modders' total list of mods done are below:Replacement / differences from stock: replacement negative power inverters in headphones AMP and LPF
voltage regulators headphonesAMP and LPF with replacement filter capacitor Cbypass (is good for filtering high frequency interference)
an additional negative regulator shoulder headphonesAMP, along with the replacement of the capacitor in the inverter on Cfly X5R 4.7uF
replacement signal resistors located between DAC outputs and LPF
capacitors in the LPF replacement for ceramic NP0
replacement 10uF 1uF ceramic filters in power modulators DACs to 0,1 uF NP0
ceramic replacement shunts opamp LPF and headphonesAMP at 0,1 uF NP0
the signal from the low pass filter to the ear specialist now passes through the wire MC16-13(silver-plated copper) 0.05, cut lead-in track, contacts potentiometer raised and do not touch the board. Still have access to the line-out, installed protective resistors 50 Om
removed the low quality resistors in the signal path to the headphonesAMP and line-out
increased power amplifier to your ear +-4V
filtering power before and after the dc-dc TD1410 (power supply for headphonesAMP)
opamp LPF LM4562
headphonesAMP made of LM4562+THS4222 - output up to 100mA per channel, 14mA quiescent current per channel(most portable headphones will work in Class A)
power cap for headphonesAMP is 2x220uF Panasonic FK, LPF 2x47uF Panasonic SU(bipolar capacitors with very low distortion)
measuring resonator 24MHz, the structure in tact CPU PLL, a generator with low jitter
stock replacement batteries for the assembly of two LP473850 1090mAh, setting equalizer to equalize pressures between the banks
sealed cables and sensor module aluminum tape to avoid interference on the part of the signal