1: 220K 1/4W for 50Hz
2: 200K 1/4W for 60Hz
3: 110K 1/4W for 100Hz
4: 56K 1/4W for 200Hz
5: 47K 1/4W for 250Hz
6: 36K 1/4W for 300Hz
7: 33K 1/4W for 350Hz
8: 22K 1/4W for 500Hz
9: 15K 1/4W for 750Hz
10: 14K 1/4W for 800Hz
For customized frequencies, please specify the frequencies in purchase order.
lSupport two-band (low and high frequency) linear-phase crossover filter for stereo channel. Frequency crossover frequencycan be set by different resistor sets shown in the Table I.
lAttenuation 80dB/decade or 24dB/octave, linear phase.
lMaximum input voltage: +/-18V
lMaximum output voltage: +/-16V
lEither use of very low distortion high quality audio OPAMPAD797, 0.03% at f=1kHz typical or low noise OPAMP NE5534.
lThree APLS / STD 50K POTs are used for the volume control: gain, low and high pass, for 0dB to -100dB attenuation.
lImplement with non-inductance 1% Dale resistors, WIMA / RIFA / EVOX film capacitors, and Nichicon FW capacitors.
lHigh power rejection ratio: 80dB and channels isolation: 100dB
lSymmetric PCB design for both R and L channels.
lHigh quality PCB, blue solder mask, double layer, 2.4mm thickness, 2oz copper. PCB dimension: 188(L) x 85(W) mm.
lRequired power supply: +/-15V to +/-18V DC, 80mA
lFor professional bi-amp, it requires exactly the same response time for the low and high frequency components.
lAudiophile low-pass and high pass filters.
1. For professional bi-amp or tri-amp applications, it requires exactly the same response time for the bass, mid-range, and treble frequency components.
2. Audiophile low-pass, band-pass, and high pass filters.
1. LV30B Positive & Negative Voltage Regulator Kit
2. T20L/T20 Toroidal Transformer or R58 R-core Transformer