Continuously variable detented input level trim Polarity button 20dB Input Pad Calibrated Level mode Output Ratio selector Clip LED indicator Continuously variable Output Gain Traditional API fully discrete circuit design Audio circuit uses the famous 2510 and 2520 Op-Amps Traditional API fully discrete circuit design Specifications Frequency Response:...
3 bands of classic API equalization Each band offers 7 API selected frequency centers Reciprocal and repeatable filtering Maximum 12 dB of boost/cut per band EQ Band 1 and 3 offer shelf/peak switching "Proportional Q" narrows filter Q at extremes Traditional API fully discrete circuit design High headroom +30 dB clip level Specifications Input...
3 bands of classic API equalization Each band offers 7 API selected frequency centers Reciprocal and repeatable filtering Maximum 12 dB of boost/cut per band EQ Band 1 and 3 offer shelf/peak switching "Proportional Q" narrows filter Q at extremes Traditional API fully discrete circuit design High headroom +30 dB clip level Specifications Input...
3 bands of classic API equalization Each band offers 7 API selected frequency centers Reciprocal and repeatable filtering Maximum 12 dB of boost/cut per band EQ Band 1 and 3 offer shelf/peak switching "Proportional Q" narrows filter Q at extremes Traditional API fully discrete circuit design High headroom +30 dB clip level Specifications Input...
Four bands of our famous sounding equalization Each band offers seven API selected frequency centers Reciprocal and repeatable filtering 12 dB of boost/cut per band EQ band 1 and 4 offer shelf/peak switching "Proportional Q" narrows filter Q at extremes Traditional API fully discrete circuit design High headroom +30 dB clip level Re-issue of 1967 API 550...
10 bands of API proprietary equalization Familiar graphics operation on one octave centers 12 dB of boost/cut per band "Proportional Q" narrows filter Q at extremes Additional resolution within the ±4 region Center detent for reliable reset Silent bypass button Based on the original 1969 API 560 EQ Specifications Number of Bands: 10 Filter Type:...
Sweepable low-pass filter (500Hz to 20kHz, -6 or -12dB slope) Sweepable high-pass filter (20Hz to 400Hz, -12 or -18dB slope) Variable notch filter with adjustable Q (fully sweepable between 20Hz and 20kHz) Individual bypass switches for each filter section Transformer Balanced Output to +28 dBu Traditional API fully discrete circuit design Uses API 2520...
BURL custom BX3 input transformer BURL custom BX2 nickel ( B1) or BX4 iron ( B1D ) output transformer audiophile, discrete, class-A, direct-coupled, capacitor free circuit path stepped gain control independent output level control 70 dB gain impedance select 1/4” front panel DI input 30 dB pad for hot signals and balanced line level input phantom power...
BURL custom BX3 input transformer BURL custom BX2 nickel ( B1) or BX4 iron ( B1D ) output transformer audiophile, discrete, class-A, direct-coupled, capacitor free circuit path stepped gain control independent output level control 70 dB gain impedance select 1/4” front panel DI input 30 dB pad for hot signals and balanced line level input phantom power...
Connections: The input and output are balanced, with the output being transformer balanced. Signal Level: The maximum specified signal level is +26 dbu Noise Floor: -82.5 dbu measured 20Hz to 20 kHz Power: 110mA with 16 volt bipolar power supplies Tube: 12AX7B Attack Time: For a 12 db change, 100uS; 7mS; 20mS Release Time: For a 12 db change, 75mS to...
Maximum input: +24dbu Maximum Output: +25dbu Frequency Response: 1Hz to 100KHz Noise Floor: -84 dbu 20Hz to 20KHz Input Impedance: 32K ohms Output Impedance: 160 ohms Current Consumption: 120mA Weight: 1.7 lbs Number of Channels: 1 Number of EQ Sections: 37 SWITCHED RANGES High Pass: 7 + Flat Low Pass: 7 + Flat Low Shelf: 8 (10 Hz - 200 Hz) Mid Bell: 8...
Pad: 0, -15, -25 db steps Max Gain: 65db Filter: 90Hz 24 db/oct Power: 100mA with self resetting fuses At 40db of gain, 0dbu output and a 150 ohm source Harmonic Distortion : 0.5% second harmonic Noise: -84dbu Frequency Response: 6Hz to 80Khz Tube: 12AX7B, selected for low microphonics Lundahl Mu metal shielded transformers for both input and output