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FIR (finite impulse response) based loudspeaker system processor
FIR based 2 channel equalizer with 4096 coefficient FIR filters per channel. Suitable for very detailed and accurate corrections and equalization in critical applications. Various types of connections, analog and digital makes easy to use different sources.
Overview
Specifications
Diagram
Panel Drawing
Downloads
The KLR 1 LS is a FIR based 2 channel equalizer with 4096 coefficient FIR filters per channel which allow a curve resolution of up to 6Hz. It can create any arbitrary Amplitude Frequency Response (AFR), Phase Frequency Response (PFR) or Delay Frequency Response (DFR) suitable for very detailed and accurate corrections and equalization in critical applications such as studio monitors, PA Systems, headphones, and car audio systems.

KLR’s range of products is all about getting the most accurate sound from your speakers. Even the best speakers and headphones introduce their own specific characteristics during playback, thus giving you a less-than-accurate reproduction of the original audio source.

However, with KLR’s range of products, you can achieve a precise curve out of your speakers with ease and create a suitable digital equalizer to achieve a perfectly balanced linear frequency response for your speakers. This way you can attain the most optimal sound your speakers are capable of delivering as well as the most accurate sound playback in all kinds of environments: – studio, live audio or car – with relatively little expertise or expense.
Key features
Frequency response equalization using 4096 FIR filters per channel.
The unit has a 16 preset memory accessible through an external, freely placeable rotary switch.
Simple operation, can be set up in a few minutes.
A USB connection allows the upload of correction filter files to the KLR 1LS unit even in the middle of a live performance without any disturbances in sound.
Wide varieties of available connections: XLR model with AES/EBU digital in/out - 4 XLR connectors for analog in/out, 2 RCA– for SPDIF digital coaxial in/out, 2 TOSLINK digital in/out; 2 XLR for AES/EBU digital in/out
Number of processing channels:
2
Resolution:
48kHz/24bits
Frequency resolution of correction curve:
6 Hz, 4096 coefficients at 24 kHz bandwidth
Inputs:
2 x analog (XLR balanced), digital - SPDIF coaxial and TOSLINK optical, AES/EBU
Outputs:
2 x analog (XLR balanced), digital - SPDIF coaxial and TOSLINK optical, AES/EBU
Input/output analog signal max levels:
+10dBu
Analog input/output connection types:
XLR
Analog input impedance:
10 kOhm
Analog output impedance:
150 Ohm
Common mode signal rejection (CMSR) of analog input:
90 dB
Dynamic range (analog input/output):
104 dBA.
THD (analog input/output):
0.07%
Signal delay:
1.6ms (analog input/output), 2.4ms (digital input/output)
Control and upload interface:
USB
Interface computer operating system:
Microsoft Windows
Power:
6.5 to 16 V DC, 3.5 W.
Presets:
16 presets, controllable by a rotary switch on the front panel
Dimensions:
220mm x 44mm x 145mm (1/2 of the 1U rack unit)
Weight:
1055 g
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* 5 x LED, channel level indicator of witch first one indicates the signal, then 2 x indicators (blue) at -24dB, 1 x indicator at -12dB, and 1 x red at 0dB.
* All outputs works in parallel all the time, inputs are analog by default, but switch to the digital input as soon as detects the signal.
Setup / Layout
Subtab 1
Subtab 2
Panel Drawing subtab 2

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