Digital room correction

Digital Room Correction is using a processor to correct the interaction between the speakers and the room.

Proper DRC requires measuring the response using a calibrated microphone at the listening position.
This measurement is used to generate a target curve, one that compensate for the amoralities caused by the interaction between room and speakers.

More about DRC

DRC can be implemented in dedicated hardware but it can be implemented in software as well.

Audiovero Abacus Preamp 14 CleanVolver €1345

stereo preamplifier with inbuilt convolver, AcourateCleaner and SqueezeLite streaming client
convolver fits to Acourate filters with standard length 65536 taps
automatic filter switch sync'ing to input samplerate
convolver hardware based on Raspberry Pi 2 and Cirrus Logic Audio Card
selectable Linux kernel 3.18.9 or 3.18.9-rt (realtime)
AcourateCleaner can be switched off individually for all channels
SqueezeLize: headless streaming client (Squeezebox emulator)
7 inputs: 6 analog, 1 digital S/PDIF
channel 1 and 2 switchable between symmetric or asymmetric
channel 6 can be used as line-in or phono-MM (by jumper selection)
channel 7 samplerates 44.1, 48, 88.2, 96, 176.4 und 192 kHz
AD and DA conversion 24 bit
clipping indicator for input channels
variable symmetric and asymmetric stereo output + fixed gain asymmetric
outputs equipped by line driver modules of newest generation
high quality headphone output
home theatre bypass function for selectable all analog channels (1:1 volume gain)
microcontroller for channel selection, display and for memorizing of channel configurations
IR remote control in metal case
3 linear power supplies for analog circuit, computer and microcontroller
switchable power plug
110 VAC on request

Added 2016

DEQX HDP-3 Preamp proccesor AUD 6575

The HDP must be placed between the pre- and the power amp.

The signal from the pre-amp is converted to digital.

The DSP is applied and the result is converted by the DACs.

Provides DEQX Calibrated™ speaker correction for passive speakers
Provides DEQX-HD™ speaker correction for up to 3-way active speakers
DEQX-HD™ active crossovers; 48dB/octave to 300dB/octave linear-phase
Traditional active 3-way crossovers from 6dB/octave to 48dB/octave
Frequency-response of speakers typically corrected from 6dB range to 1dB
Automatically corrects phase and group- delay over typically 3ms window
32-bit, floating-point, 240-MFLOPS processing with dual SHARC DSPs
Audiophile 24-bit 96kHz ADC-DSP-DAC processing and conversion
Provides anechoic measurement and detailed display for speaker correction
Provides room-measurement/display (non-anechoic) for room correction
Calibration Kit provides DEQX-calibrated measurement microphone
Two analog inputs: Unbalanced (2 x RCA) and Balanced (2 x XLR)
Two stereo digital inputs: S/PDIF (1 x RCA) and AES/EBU (1 x XLR)
Six analog outputs: unbalanced (6 x RCA)

DSPeaker Anti-Mode 2.0 Dual Core

Manufacturers description:

The new DSPeaker Anti-Mode 2.0 Dual Core room correction system can be used to correct any stereo audio system automatically. It utilizes a highly powerful DSP chipset for master grade room correction, the new dual-core VS8053 "IceDragon".

The new Anti-Mode Dual Core can be inserted between a pre-amp and a power amp (or active speakers). With automatic calibration and built-in TFT screen to display the room measurements, it offers the unmatched ease of use DSPeaker is famous for around the world.

In addition to the acclaimed Anti-Mode room correction, Dual Core also offers remote controlled USB-DAC / S/PDIF-DAC, pre-amp, volume control and versatile EQ functions. All easily controlled with the featured remote control. Both balanced XLR/RCA connections are available, but also Pure-Digital mode where the corrected signal is passed through completely in the digital domain.

Automatically corrects any stereo system with userdefined frequency range
Remote controller
Can be used as a digital 1.1 crossover
Measures and displays the room response on a color TFT display
Supports multiple measurement points
Custom parametric EQs (notching, peaking, lowpass, highpass)
Easy to use House curve and Tiltcurve tools
Supports several independent "sweet spots", selectable with remote controller
USB DAC
Dual 6 MHz oversampling multibit DAC per output channel
Dual 192 kHz ADC per input channel
Pure Digital mode (Optical)
Digitally controlled analog volume control

Price: $1200 / €850

Ground Sound DCN28 € 4.217,00

DCN28 is a digital crossover, pre-amplifier and room correction in one unit.

DCN28 is supplied with the XOverWizard II advanced software which is a graphical tool to manipulate with inputs, outputs, gain, crossover frequencies, crossover slopes, equalization and delay. The software features measurement engine, post processing tools, optimizer engine with target option, output listing and direct transfer to the crossover setup environment.