Carvin Audio Great Sounding Gear For Musicians and Sound Professionals
Instructions for CARVIN audio models including: BX-1, Bass Preamp, BX-1 Bass Preamp, Preamp
Carvin BX1 Bass Preamp - Carvin Audio
Carvin LS1503 800W 15 Inch 3-Way Main Speaker - Carvin Audio
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DocumentDocumentBX1 BASS PREAMP CARVIN ENGINEERING DATA BX1 INTRODUCTION The BX1 Bass Preamp offers classic, natural bass tone with unprecedented tonal control and extended headroom. The BX1 begins with a boutique flat response, then we add extensive tone control allowing you to carve out your signature sound. Harmonic content increases as you turn up the INPUT GAIN control, producing the rich harmonics you desire from your preamp. Lightweight, compact design, bullet-proof construction and a list of indispensable features assure the BX1 will be the heart of your tone for years to come. BX1 BASS PREAMP BX1 FEATURES: » Preamp GAIN and master VOLUME controls » BLEND control adjust s the EQ/dr y mix » Mid sweep semi-parametric EQ » COMPRESSOR: Threshold and Strength controls » Effects Loop » True Bypass » Switchable MUTE » DIRECT OUT bal anced XLR and 1 /4-inch » Switchable Ground Lift for AC ground isolation » THRU/TUNER output jack independent of MUTE switch » -12dB attenuation switch » Solid metal shaft controls with threaded metal bushings mounted to top panel » 9V Power supply included. 90-230VAC, 50-60Hz » Battery compartment for 9V battery operation BX1 SPECIFICATIONS: » Frequency Response: 25Hz-18kHz » Input Gain: 13dB » Input Impedance: 2.2M » Maximum Input: -6dB » Maximum Output: MAIN +6dB, EFF SND/RTN +4dB, THRU/TUNER -6dB » Tone control s: +/-10dB BASS (25Hz-100Hz) MID(semi-parametric sweep 100Hz-2.5kHz) TREBLE(3kHz-18kHz), , » Power requirement: 9VDC / 50mA. Polarity: Center Negative Plug » 9V Power supply included. 90-230VAC, 50-60Hz » Dimensions: 6"W x 5.5"D x 2.5" H Wt. 2 lbs. BX1 CONTROLS: » 1. THRU/TUNER JACK (UNMUTED) The THRU/ TUNER jack is a mono 1 /4-inch jack designed for connecting a tuner or sending the bass signal to another device. This output is unaffected by the MUTE and all other functions of the BX1 so you may tune your bass quietly while using the MUTE. » 2. INPUT JACK The 1 /4-inch phone jack is a high impedance instrument input designed to handle both active and passive basses in conjunction with the -12dB attenuation switch » 3. PWR/CLIP When the LED is green, this indicates the unit is powered on. When the LED flashes red, this indicates your signal is nearing clipping. Solid Red indicates your signal is clipping and distortion will be heard at the outputs. » 4. -1 2dB AT TENUATION SWITCH This switch attenuates the input by 12dB when in the up position. This is useful when the incoming signal is too strong and is causing distortion to be heard even with the input gain at 0. » 5 . LED INDICATORS These LED indicators let the user know status of each feature. COMPRESSOR-Green(ON), Red(OFF). MUTE-Red(On). BYPASS-Red(Pedal bypassed), Green(Signal flows through preamp.) » 6. BYPASS Sends the signal around the EQ Tone preamp. The INPUT GAIN, -12dB attenuation, COMPRESSOR, VOLUME and GND LIFT still affect the signal. The LED color indicates the following. Green(ON), Red(OFF). -OVER- WARRANTY This CARVIN product is guaranteed in normal use to be free from electrical and mechanical defects for a period of 1 year from date of purchase. Retain proof of purchase. This warranty is in lieu of any and all other guarantees or warranties, expressed or implied. There shall be no recovery for any consequential or incidental damages. PG 2 carvinaudio.com BX1 2022-4-12 CARVIN ENGINEERING DATA BX1 BX1 BASS PREAMP » 7&8. EFFECTS LOOP The SEND jack is the output of the preamp and is designed to deliver the proper level for the input of an external effects processor. The SEND signal source is after the TONE CONTROLS and BLEND, and before the BYPASS and MUTE. The RETURN jack is designed to receive signals from the output of an external effects processor. When a signal is plugged into the RETURN, it breaks the connection between the preamp and the internal power amp. The RETURN signal goes through the COMPRESSOR and VOLUME control to the outputs. The RETURN signal is before the BYPASS. When BYPASS is on (green), the signal does not pass through to the output. » 9. MUTE The MUTE switch turns off the output of the pedal. A red LED indicates the MUTE switch is on. The MUTE switch is ideal for changing basses and silent tuning on-stage. The THRU/TUNER and EFF SND outputs are never muted. » 10. DC IN / Battery Operation Use the included 9V power supply to power the BX1. The BX1 can also operate on a 9V battery. When using a battery, the BX1 will NOT TURN ON until there is a 1 /4-inch plug inser ted into the input . Leaving the BX 1 plugged in when not using will drain the battery. » 11. COMPRESSOR Turns the COMPRESSOR on and of f. » 1 2. 1 /4-INCH Output Connect this output to your amplifier. » 13&14. XLR OUTPUT JACK and GROUND LIFT The DIRECT OUT XLR jack provides a balanced output for going direct to the main PA or to a recording input. The output level is adjusted from the VOLUME level, GND/LFT - If a hum occurs when connecting the XLR to a mixer, try using the GND LIFT switch. The GND LIFT switch lifts the ground pin 1 of the XLR » 15. BLEND This control directs some or all of the signal into the EQ tone section. When set to FL AT, no signal passes into the EQ tone section. » 16. VOLUME This is the master VOLUME. » 17&23. BASS and TREBLE TONE CONTROLS The BASS and TREBLE controls are custom shaped tone controls designed to deliver punchy lows and crisp highs for a variety of bass tones. When a control is turned to the right it boosts the signal and when turned to the left cuts the signal. The affected frequencies for the BASS start at 25Hz and can deliver a great deal of gain. Be careful not to distort the output. The affected frequency for the TREBLE control begins at 3kHz. » 19&21. SEMI-PARAMETRIC MID SWEEP (200-2kHz) The FREQ control does not function if the GAIN control is set in the center "0" position. To demonstrate, turn the GAIN to the right for full boost. Now play your bass and turn the FREQ control from left to right and notice how the added mids change frequency. Now turn the GAIN to the full left and turn the FREQ control again and notice the mids disappear at different frequencies. The mid sweep system controls can be very effective to fine tune your overall sound. 14 15 16 17 18 19 20 21 22 23 13 1 12 BASS PREAMP 2 BLEND 50% BASS I0I MID I0I FREQ TREBLE I0I III III III III III III FLAT EQ - 10 +10 - 10 +10 - 10 +10 VOLUME THRESHOLD COMP STRENGTH INPUT GAIN PWR CLIP 3 4 5 6 4 5 6 4 5 6 4 5 6 LIFT - 12dB 4 01 23 01 23 01 23 01 23 7 8 9 10 7 8 9 10 7 8 9 10 7 8 9 10 GND COMP MUTE 0dB 5 BYPASS COMPRESSOR MUTE PREAMP IN/OUT IN/OUT 11 10 9 8 IN/BYPASS 76 DC IN 9VDC 50mA EFF SEND EFF RTN BASS PREAMP » 18&20. COMPRESSOR This feature is designed to limit the peaks so the volume level is more constant. This allows greater average power to your speakers without your power amp (distorting). The COMPRESSOR has two knobs, THRESHOLD and STRENGTH. The THRESHOLD control knob sets the point where the compressor kicks in. Rotating this control in the clockwise direction lowers the level where the compressor turns on. The STRENGTH knob is used to set the amount of compression once the threshold has been reached. When this knob is swept all the way counter clockwise (left) the unit is set for a mild compression. As the knob is rotated clockwise (right) the compression increases. » 22. INPUT GAIN The INPUT GAIN control increases the sensitivity of the 1 /4-inch input s . Turn up the gain to compensate for instruments with low outputs. For low volume situations or to get the best dynamics from high output instruments, adjust the INPUT GAIN control to a low setting. PG 3