1. تعارف
The Darkglass Microtubes B7K V2 is a versatile bass preamp pedal designed to provide a wide range of tonal options for electric bass players. It combines a powerful overdrive circuit with a comprehensive 4-band equalizer and a balanced XLR output, making it suitable for both live performance and studio recording. This manual provides detailed instructions for setting up, operating, and maintaining your B7K V2 pedal.
2. خاصيتون
- Combines a preamp, EQ, and overdrive in one unit for powerful tone shaping.
- Features a blend control to mix clean and overdriven signals for perfect balance.
- Includes a 4-band active EQ with bass, low mids, high mids, and treble controls.
- Grunt switch adds three levels of low-end boost for a thicker sound.
- Attack switch adjusts treble content, offering boost, flat, and cut settings.
- Low mids switch changes the center frequency from 1 kHz to 500 Hz.
- Hi mids switch changes the center frequency from 3 kHz to 1.5 kHz.
- Parallel output for running the input signal through unaffected.
- Direct output provides a balanced version for PA systems or studio consoles.
- Operates with a regulated 9V DC adapter (not included).
3. ڪنٽرول ۽ ڪنيڪشن

شڪل 1: مٿي view of the B7K V2 pedal.

Figure 2: Left side connections.

Figure 3: Right side connections.
3.1 ڪنٽرول Knobs
- مرکب: Mixes the clean input signal with the overdriven signal. The clean signal remains at unity gain while the volume of the overdriven signal is controlled by the Drive knob, allowing for fine-tuning of the blend ratio.
- سطح: Sets the overall output volume of the pedal.
- ڊرائيو: Controls the amount of gain in the overdriven signal.
- گھٽ: Adjusts the level of the low frequencies.
- لو مڊس: Adjusts the level of the low-mid frequencies. The center frequency can be switched between 500 Hz and 1 kHz.
- هيلو ميڊز: Adjusts the level of the high-mid frequencies. The center frequency can be switched between 1.5 kHz and 3 kHz.
- ٽربل: Adjusts the level of the high frequencies.
3.2 سوئچ
- حملو سوئچ: Modifies the treble content of the overdriven signal. Options are Boost, Flat, and Cut.
- گرنٽ سوئچ: Modifies the low-end content of the overdriven signal. Options are Thin, Raw, and Fat.
- Lo Mids Switch: Selects the center frequency for the Lo Mids knob (500 Hz or 1 kHz).
- هاء مڊس سوئچ: Selects the center frequency for the Hi Mids knob (1.5 kHz or 3 kHz).
- گرائونڊ لفٽ سوئچ: Disconnects the ground from the XLR output to help eliminate hum or ground loops when connected to external equipment.
3.3 ڪنيڪشن
- Input (1/4" Jack): Connect your bass guitar or other instrument here.
- Output (1/4" Jack): Connect to your bass amplifier يا ٻين اثرات pedals.
- Direct Output (XLR): Provides a balanced output for connecting directly to a PA system, mixing console, or audio interface.
- Parallel Output (1/4" Jack): Outputs the unaffected input signal, useful for parallel processing or sending a clean signal to another device.
- 9VDC ان پٽ: Connect a regulated 9V DC power supply (center negative, minimum 30mA).
4. سيٽ اپ
- Ensure the pedal is powered off before making any connections.
- پنھنجي باس گٽار کي سان ڳنڍيو ان پٽ پيڊل جي ساڄي پاسي جيڪ.
- ڳنڍيو ٻاھر jack on the left side to your bass ampلائفائر جو ان پٽ.
- If using the balanced output, connect the Direct Output (XLR) to a PA system, mixing console, or audio interface.
- If you need an unaffected signal, connect the متوازي اوٽ anotherئي ڊوائيس ڏانهن.
- Connect a regulated 9V DC (center negative) power supply to the 9 وي ڊي سي ان پٽ. The pedal requires a minimum of 30mA. Note: A power supply is not included with the pedal.
- Once all connections are secure, you can power on the pedal.
5. آپريٽنگ هدايتون
5.1 بنيادي آپريشن
To activate the pedal, press the footswitch. The LED indicator will illuminate. To bypass the effect, press the footswitch again.
5.2 Tone Shaping
- Start with all EQ knobs (Low, Lo Mids, Hi Mids, Treble) at the 12 o'clock position for a flat response.
- ترتيب ڏيو ڊرائيو knob to achieve your desired level of overdrive. Higher settings will produce more distortion.
- استعمال ڪريو ملاوٽ knob to mix the clean signal with the overdriven signal. This allows you to retain clarity and low-end presence while adding grit.
- سان تجربو ڪريو حملو ۽ Grunt switches to fine-tune the treble and bass characteristics of the overdriven tone.
- Utilize the 4-band EQ to sculpt your overall tone. The Lo Mids ۽ هيلو ميڊز switches allow you to select different frequency centers for precise control.
- ترتيب ڏيو سطح knob to match the output volume with your bypassed signal or to boost your signal for solos.
6. سار سنڀال
- پيڊل کي نرم، سڪل ڪپڙي سان صاف ڪري صاف رکو. رگڙيندڙ صاف ڪندڙ يا محلول استعمال ڪرڻ کان پاسو ڪريو.
- Protect the pedal from extreme temperatures, moisture, and direct sunlight.
- پڪ ڪريو ته سڀئي ڪيبل سٺي حالت ۾ آهن ۽ سگنل جي نقصان يا نقصان کي روڪڻ لاءِ صحيح طرح سان ڳنڍيل آهن.
- Always use a regulated 9V DC center-negative power supply to avoid damage to the unit.
7. مسئلا حل ڪرڻ
| مسئلو | ممڪن سبب | حل |
|---|---|---|
| آواز ڪونهي | غلط بجلي جي فراهمي؛ ڪيبل صحيح طرح سان ڳنڍيل نه آهن؛ پيڊل کي نظرانداز ڪيو ويو آهي. | Verify 9V DC center-negative power supply is connected. Check all input/output cables. Ensure pedal is engaged (LED illuminated). |
| Excessive hum or noise | Ground loop; faulty cables; interference from other equipment. | مشغول ڪريو گرائونڊ لفٽ switch on the XLR output. Try different cables. Ensure power supply is isolated and free from noise. Move pedal away from power transformers or other noisy electronics. |
| Weak or distorted signal (unintended) | غلط حاصلاتtaging; faulty instrument cable. | ترتيب ڏيڻ سطح ۽ ڊرائيو knobs. Test with a different instrument cable. |
8. وضاحتون
- شيء جو وزن: 1.1 پائونڊ (0.5 ڪلوگرام)
- پيداوار جي ماپ: 6 x 7 x 10 انچ
- شئي ماڊل نمبر: B7K2
- رنگ: ڪارو
- ڪنيڪٽر جو قسم: 1/4" (aux), XLR
- هارڊويئر انٽرفيس: USB (for potential future firmware updates, not for audio)
- سگنل فارميٽ: اينالاگ
- طاقت جو ذريعو: تار ٿيل برقي
- جلدtage: 9 وولٽ ڊي سي (مرڪزي منفي)
- موجوده ڊرا: گھٽ ۾ گھٽ 30mA
9. وارنٽي ۽ سپورٽ
Darkglass Electronics products are designed for reliability and performance. For specific warranty information and support, please refer to the documentation included with your purchase or visit the official Darkglass Electronics webسائيٽ. وارنٽي دعوائن لاءِ خريداري جو ثبوت رکو.
For technical assistance or service inquiries, please contact Darkglass Electronics customer support through their official channels.





