Neumann sound?

Transparent summing amp with high amount of Harmonics excitation – associated with gentle smooth pleasant analog distortion character  – adding depth, color, presence, character and warmth to sound mix, as result of legendary Haufe transformers

Neumann types:

• Neumann 2B: ALL STYLE, transparent

• Neumann 2C: ALL STYLE , transparent

• Neumann 2A: VINTAGE SOUND (acoustic – jazz – blues – rock)

• *2A: acoustic, classical, jazz, blues, blues-rock, classic-rock, folk-rock, country, ballad, bluegrass etc.

Comparison test

No A/B comparison audio tests due to following reasons:       

• Your studio setup is total different like mine or the others.
• Completely different mixing strategy, different style, sound and production.
• Can not be reproduced Your studio environment as inserts, sends, external processors.
• Can not be reproduced Your studio setup, your monitor types, audio material, pre amp, amp, gain adjustment, cabling and so on..

There are plenty of customer feedback, please read about more…

Haufe / Pikatron transformers

The extremely high level handling of this transformer makes it useful as a line level input AND output in addition to being one of the best sounding  input transformers ever. The Haufe audio transformers used in some of the finest vintage high fidelity and professional German and European audio equipment, including Telefunken/Siemens/TAB/ recording consoles, Klangfilm theater equipment, etc.

The (Neumann/Filtek/Lawo or Tab/Telefunken) dual junction amplifier contains two(2) mutually independent stereo balanced audio frequency amplifiers designed for signal summation in high quality studio mixing desks. Special attention has been given in the design of the cards, to dependability and operational reliability, stability of the electrical parameters, good immunity to disturbance and crosstalk attenuation between the two (L/R) signal paths.

Fully balanced Solid State Discrete summing network. The components are tested and selected. (Vishay Dale resistors) Good quality components result  the correct and low noise operation. The summing network PCB is own development, and absolutely hand made. The front/rear panel design based on unique idea. Custom order: Unique ideas, plans like: channel number, design(your name or studio name) connections (DB25, TRS etc.) please contact me, to make the most appropriate gear for your studio! (build time depend of project size 5-20 working days)

Neumann – legendary Haufe transformer summing amp

• AMP: Neumann v475-2 (a/b/c) Dual mutually independent dual stereo haufe transformer coupled discrete amp
• Dual Stereo Balanced: 1xStereo Left side /1xStereo Righ side In/Out
• Input capability: up to 100 inputs (tech. doc  Neumann GmbH)
• Max output gain: + 27db relative to 0dB
• Max input gain: + 8dBm
• Gain adjustment range:  +27dB by 21 step precision potentiometer
• Standard level inputs:   Dual Balanced, floating to ground
• Standard level outputs: Dual Balanced, floating to ground
• Output impedance (load imp) : >300 ohm
• Crosstalk attenuation: >110db from channel to channel
• Frequency response: <+0/-0,25dB (20Hz to 20kHz: <+0/-0,5dB
• Signal/ Noise rate: <-110dBqp
• Extraneous signal level with V=0db : <-99dMrms/-94dBmrms with 1/30 sources
• Input Transformers:  2xHaufe
• Output Transformers: 2XHaufe
• Signal/ Noise rate: -110dB A-weighted
• TRS connection wiring: (Tip:HOT/,Ring:COLD/Sleeve:GROUND)
• Operation voltage: 18,6 – 28V/600- 1500mA

Mixer summing network

• Dual Stereo Discrete Solid State Balanced: 1xStereo Left side/1xStereo Righ side
• In/Out:Balanced, floating to ground
• Output impedance 600-1k ohms balanced 
• Frequency response: 0-500Khz
• Crosstalk 1Khz: -95dB
• Signal/ Noise rate: -110dB
• Pure hand made! Hand wired and tested point-to-point!
• Selected VISHAY DALE military metal-film resistors

Connectors

• D-Sub DB25 Tascam Standard Analog Balanced
• TRS  1/4″ balanced connection : (Tip:HOT/,Ring:COLD/Sleeve:GROUND)
• XLR (3 pin xlr) AES industry standard “pin-2 hot” 

PSU – power supply

•  110 – 240VAC 50-60Hz 18-24VDC 0.8-1.5A  
• world wide UK/US/EU plug

Headroom – Dynamic-range space

• Headroom is how much room has your audio signal before it starts to get compressed and distorted.
• Headroom – It provides buffer zone for harmonics, transients or loud sounds without risking clipping, which result a more dynamic open and wide, depth 3D sound. 
• Also it provides space for Gentle Harmonics Distortion. 

Passive side of mixer

• -25dB insertion loss resistance (gain loss)
• ideal for both Active (Neumann) and Passive (external micpre) work range

Drive it higher the passive side of summing mixer for more harmonics & transients

• Generate analog harmonics and hit the gentle harmonic distortion point
• By proper gain staging from DAW can achieve the Analog Harmonics Sweet Spot

• Simply boost up your DAW output Level (master fader) – and you get some “nice” distortion because you’re pushing the summing quite a bit over its nominal level  

read more about

Additional Options – Documentation – Technical Description – User Manual

Youtube explain videos

LOOP BACK

DAW – SUMMING

STEREO TO MONO

ACTIVE / PASSIVE 2in1

What’s the 2 in 1 (two in one) Active Passive?

• this function enables to connect different kind of amplifier
• freely can use a completely different sounding amplifier than the inside amp

There are two ways to control by A/P switch:

1. Active mode: gain makeup by inside amp Neumann/Filtek/Lawo/NE2OX
2. Passive mode: gain makeup by Your external micpres or DAW amplifiers

Benefits: Different amp = Different sound character

free to choose and use completely different sounding amplifier

Master Send/Return:

SEND out the master stereo to external processors like EQ, Comp, Limiter than return to master out

• 2xSwitch version: Bypass or Enable switching
• Auto TRS version: signal was non interrupted if nothing connected to SEND out TRS

STM – stereo to mono function

Benefits:

• no need to waste precious stereo CH’s for mono instruments
• clarity of position in the stereo field (mono is true mono)

Master Stereo to mono – Mono Compatibility switch

• This provides an excellent way to check mono compatibility and to also learn spatial tricks from your favourite reference material.

The word ‘Mono’ is panned absolutely center. This means both Left and Right speakers reproduce the same word ‘Mono’ at the same volume. This also sounds ‘mono’ and so panned to the middle.
Checking your mix for Mono compatibility as you go is a good preventative measure. Sometimes just because a mix sounds good in stereo doesn’t mean it will sound good when the left and right channels are combined into a mono signal. In some cases, you may hear what is known as comb-filtering, which will color the sound of your mix and cause peaks and dips in its frequency response. In some cases, instruments may lose their integrity or even seem to completely disappear from the mix!