The BRZHIFI F2 HiFi Stereo Preamplifier is a compact, high-fidelity transistor heating preamplifier designed to shape and optimize audio signals before they reach your main power amplifier. It is manufactured by the specialized audio brand

 

Key Technical Specifications

• Device Type: Transistor heating preamplifier with private mold styling.
• Audio Channels: 2.0 Stereo channel output.
• Tone Correction: Dedicated independent Bass and Treble adjustment knobs for customized frequency tuning.
• Audio Processing: Features localized tone manipulation hardware matching discrete equalization standards

 

 

Key Functionality & Design Features

• Signal Optimization: It acts as a processing middleman between standard line-level source devices (like DACs, CD players, or phones) and your power amplifiers to enrich tone depth.
• Equalization Flexibility: Integrates physical continuous-turn dials for smooth equalization tweaks without digital latency. [1]
• Chassis Construction: Follows the signature BRZHIFI standard of using machined aluminum alloy enclosures to keep background noise minimal and shield inner circuitry.

 

Design original intention

Let the breathing of the 1980s simulate the golden age continue in your listening space. We have a collection of LM741 gold sealed operational amplifiers from the 1980s and 1990s in our hands. Thanks to the process containing lead and mercury, lead has better electrical performance and mercury has better heat dissipation performance. In today’s world dominated by environmentally friendly plastic packaging, the transparent and delicate sound quality created by this almost extinct process has been fully verified on the T4 front-end. Based on the essence of the same origin Quintessence Group1 line, we have eliminated niche singing and playback inputs and added more daily high and low frequency adjustment and straight through functions. Not for the sake of high and low scores, just to make this retro gold seal craftsmanship and practical tuning a fever level that every music lover can reach.

 

Main operational amplifier

LM741 gold sealed operational amplifier ×2

Craftsmanship from the 1980s and 1990s, with no substitute on the market

Tonal operational amplifier

NE5534P Accurate adjustment of high and low frequencies with minimal distortion

Power supply materials

7W Transformer + 5600UF filtering capacitor

Stable power supply, reduced noise, and solidified sound quality foundation

 

Signal switching

Nondestructive switching of relays

No popping sound, smooth switching

 

Core functionality

High and low frequency adjustment + direct mode

If you want to adjust the style, adjust it

If you want to hear the original sound cut it off

 

Output interface

Stereo Out

Compatible with multiple devices, with strong scalability

 

Exclusive scarcity

 

The stock of dismantled products from the 1980s and 1990s cannot be replicated under modern environmental regulations. The LM741 gold sealed version is rare in the market, and there is no similar product among competitors.

 

Collectible value

 

Old craft chips are remnants of audio history, using one chip less than another, combining practicality and collectible properties.

 

Classic craftsmanship

Gallbladder Music Experience

Optimizing the conductivity and thermal stability of the chip with lead mercury composition, it has the characteristic of warm sound with a bile flavor, balancing high resolution and durability, and is not tiring to listen to for a long time.

 

Front panel labels:

* POWER

* SELECT (1, 2, 3)

* TRE/TONE

* BASS

* VOLUME

* Min

* Max

Aluminum alloy knob

 

Smooth damping precise control

 

Selected high-quality aluminum alloy, CNC precision machining + delicate surface treatment, warm and non slip touch, strong metallic texture, durable and long-lasting.

 

Rear panel labels:

 

* OUTPUT

    * A/B

    * L/R

* INPUT

    * 1

    * 2

    * 3

 

RCA Lotus Terminal

 

3-in-2-out audio interface

 

Configure three sets of inputs and two sets of outputs.

Flexible switching of multiple audio sources.