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High Resolution FIR based 10 channel loudspeaker system processor.
10 channel, ultimate FIR filter-based loudspeaker system processor.
After 15 years of offering detailed EQ for complete loudspeaker systems, we have taken the technology to the next level of accuracy utilizing detailed EQ on each band to make an ideal crossover. Please meet the Klear KLR1012 – brings the detailed equalization of loudspeakers to a new level of accuracy by applying the power of FIR EQ filters to each of the system bands. The APL Workshop, APL TDA EQ, APL TDA and APL C5 programs, in conjunction with APL1012, make the tuning process predictable and straightforward. Analog Device, Xilinx, Cirrus Logic chips are on board.

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
Powerful FPGA based DSP, capable of processing 12 channels of 4096 tap FIR filters.
Set of PC programs, (Windows), for configuration and measurements. APL Workshop, APL TDA EQ, APL C5.
Extremely short time for tune up – no tweaking and iterations.
High Grade Cirrus Logic converters offering 117dBA dynamic range.
High Resolution audio bandwidth up to 48 kHz.
Ground lift option to deal with ground loops.
Auto mute of analog in if signal level drops below -90 dB.
Mixing of digital and analog inputs.
2 x XLR balanced, “-10dBV” “+4dBu” levels, 7 kOhm impedance; 1 x AES/EBU digital audio input (up to 96 kHz)
10 x XLR balanced, “-10dBV” “+4dBu” levels
Operating bandwidth:
24 kHz for 48 kHz Sample Rate version unit; 48 kHz for 96 kHz Sample Rate version unit
DSP resolution:
Unlimited FPGA processing
DSP type:
FPGA + Audio signal processor
Signal converters:
Cirrus Logic CS4385 CS4272
Signal-to-noise ratio analog input:
114 dBA
Total harmonic distortion analog input:
0.0003% at 1 kHz at -15dBFS; 0.002% at 1 kHz at -0.1dBFS
Crossover / Equalizer:
Unlimited options offered by APL Workshop and APL C5 programs
APL C5 program
11 preset memory recalled by 16 position switch; watch dog served restart in case of non-responsive DSP
Time alignment:
0 – 85ms; 0 – 28 m; Step 0.02ms (48 kHz SR) 0.01ms (96 kHz SR)
Control Interface:
USB type A to B
Output level limiters at all outputs allowing using loudspeakers at their full power with 10 times peak levels untouched
>90 dB
Operating voltage:
7.1V – 15.7V
Current drawn, power on:
500 mA for 48 kHz SR version, 12V power supply; 550 mA for 96 kHz SR version, 12V power supply
Current drawn, power off:
1.5 mA
2A PPTC Resettable Fuse
Physical Specifications:
Rack mounting
Subtab 1
Subtab 2
Panel Drawing subtab 2

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