IWISTAO BLOGGER : HIFI Preamplifier

Showing posts with label HIFI Preamplifier. Show all posts

Wednesday, November 15, 2017

IWISTAO HIFI Preamplifier Tone Adjustment Bass Tremble Middle OPA2604 LME49720 Whole Aluminum Casing Class A Power

Here is the video for IWISTAO HIFI Preamplifier with Tone Adjustment for Bass Tremble Middle, there are 3 buttons for tone adjustment.

This preamplifier has tone control functions and adopts class A power, sound extremely delicate, slender high-frequency, low frequency plump and elastic, if use top op amp IC like as OPA2604 or LME49720, it will achieve perfect sound. Specially, it used a R-type audio dedicated transformer. And it has direct access function; you can skip tone adjustment to achieve original sound completely.

IWISTAO HIFI Preamplifier Tone Adjustment Bass Tremble Middle OPA2604 LME49720 Class A Power Stereo from IWISTAO HIFI AUDIO on Vimeo.

When audio sourcing record, speaker unit, placing the device is not necessarily perfect, and if your preamplifier adopt pure straight, it may not be able to meet the demand. At this moment, add tone adjustment function is very important. If you no extra power supply equipment, passive preamp tone is preferred, which can enhance the effect of high and low frequency is obvious.

More details, please click IWISTAO HIFI Preamplifier

Sunday, August 28, 2016

HIFI Preamplifier with 3 Ways Active Electronical Crossover Linkwitz-Riley Filter

Although many audiophiles put a lot of money and efforts to preamplifier, unfortunately they may experiences a little frustration in final output. It is hardly difficult to solve this problem to use excellent pre-divider circuit of preamplifier plus multiple power amplifiers, our series of electronic crossover board and amplifier board can perfectly realize your dreams!

There is a HIFI preamplifier with 3 ways electronical crossover，whose PCBA is refer to the ESP company by US, which is set to six-channel stereo output structure to output left and right channel stereo signal, this is, output treble of left and right channel, midrange and bass of left and right channel, you can directly connect it with 6 channel amplifier circuits then drive your HIFI speakers. Pre-electronic crossover ensures original and natural sound through separated frequency of pre-amplifier small-signal, then drive power amplifier directly to push speakers, allowing you to enjoy the atmosphere of the studio's site.

Crossover PCBA is constituted by renowned Linkwitz-Riley filter. Linkwitz-Riley filter, mainly for the active filter circuit, for example, it is used in many sophisticated multi-way electronic crossover systems. The characteristics of this filter is up to 4 stages attenuation slope, in other words, every one octave frequency sound energy will be attenuated 24dB, i.e. attenuation slope of -24dB / Oct (Oct ie Octave, an octave interval of the mean). Meanwhile, in the entire audio band (20Hz-20kHz), Linkwitz-Riley filter has a very flat phase response, which is far better than Butterworth filter after filter signal, no phase distortion, which is widely admired by audiophiles.