1. Úvod
The MXR M87 Bass Compressor is designed to bring studio-quality compression to your bass rig. This pedal offers a comprehensive set of controls to fine-tune your sound, from subtle dynamic control to pronounced compression effects. Featuring CHT™ Constant Headroom Technology, it ensures clear performance and ample headroom. The transparent compression allows your full dynamic range to pass through until the signal reaches the compression threshold, which is visually indicated by ten bright gain-reduction status LEDs. Encased in a durable, lightweight aluminum housing, the M87 is built for the road.
Klíčové vlastnosti:
- CHT™ Constant Headroom Technology for clear, clean performance.
- True bypass circuitry for uncolored tone when disengaged.
- Ten highly visible gain-reduction status LEDs for precise visual feedback.
- Transparent compression that preserves dynamic range until threshold.
- Durable, lightweight aluminum housing.
2. Ovládací prvky a funkceview
The MXR M87 Bass Compressor features a complete array of controls to shape your bass tone effectively.

Obrázek 1: Nahoře view of the MXR M87 Bass Compressor, showing the control knobs and footswitch.
Ovládací knoflíky:
- ZÁCHVAT: Adjusts how quickly the compressor reacts to the input signal. Higher settings result in a slower attack, allowing more of the initial transient to pass through.
- UVOLNĚNÍ: Controls how quickly the compressor returns to its uncompressed state after the signal drops below the threshold. Higher settings result in a slower release.
- POMĚR: Determines the amount of compression applied once the signal exceeds the threshold. Higher ratios mean more aggressive compression.
- VSTUP: Sets the input level of your bass signal into the compressor. This control also affects when the compression threshold is met.
- VÝSTUP: Upravuje celkovou výstupní hlasitost pedálu.
LED indikátory:
- LED REDUKCE ZISKU: Ten bright LEDs provide visual feedback on the amount of gain reduction being applied in real-time. This helps in precisely setting the compression.
- STAVOVÁ LED: Indicates whether the pedal is engaged (on) or in true bypass mode (off).
Jacks and Footswitch:

Obrázek 2: Strana view of the MXR M87 Bass Compressor, highlighting the input and output jacks.
- INPUT Jack: Connect your bass guitar or the output of another pedal to this 1/4-inch input.
- VÝSTUP Jack: Connect this 1/4-inch output to your amplifier nebo vstup dalšího pedálu ve vašem signálním řetězci.
- POWER Jack: Connect a 9V DC power adapter (not included) to this jack.
- Nožní spínač BYPASS: Toggles the effect on and off. The pedal features true bypass, ensuring your tone remains unaffected when the pedal is disengaged.
3. Nastavení
Follow these steps to set up your MXR M87 Bass Compressor:
- Připojte baskytaru k VSTUP jack of the M87 using a standard 1/4-inch instrument cable.
- Připojte VÝSTUP jack of the M87 to your amplifier nebo další pedál v signálovém řetězci pomocí dalšího 6 mm kabelu.
- Connect a 9V DC power adapter (not included) to the MOC jack on the side of the pedal. Ensure the power supply meets the pedal's requirements (9V DC, center-negative).
- Zapněte svůj amplifier and adjust its volume to a suitable level.
Video 1: Overview of the MXR M87 Bass Compressor, demonstrating its features and connections.
4. Návod k obsluze
The MXR M87 Bass Compressor is designed for intuitive operation. Experiment with the controls to find the perfect compression for your playing style and musical context.
Základní provoz:
- Engage the pedal by pressing the BYPASS Nožní spínač. The STATUS LED will illuminate.
- Start with all control knobs (ATTACK, RELEASE, RATIO, INPUT, OUTPUT) at their 12 o'clock positions.
- Play your bass and adjust the VSTUP knob until the GAIN REDUCTION LEDs show consistent activity, indicating that the compressor is engaging.
- Upravte POMĚR knob to control the intensity of the compression. Lower ratios provide subtle smoothing, while higher ratios create a more pronounced, squashed effect.
- Dolaďte ÚTOK a UVOLNĚNÍ knobs to shape the transient response and sustain characteristics. Faster attack settings will compress the initial pluck more, while slower attacks allow more punch. Faster release settings will return to uncompressed sound quickly, while slower releases provide longer sustain.
- Použijte VÝSTUP knob to match the volume of the compressed signal to your bypassed signal, or to provide a boost if desired.
Tips for Tone Shaping:
- For subtle peak limiting and dynamic control, use a lower RATIO setting (e.g., 2:1 or 4:1) with moderate INPUT.
- To achieve a more sustained and punchy tone, increase the RATIO and adjust ATTACK to be slightly slower, allowing the initial transient to cut through before compression engages.
- The GAIN REDUCTION LEDs are crucial for understanding how the compressor is reacting to your playing. Aim for consistent, but not excessive, gain reduction for natural-sounding compression.
5. Specifikace
| Specifikace | Hodnota |
|---|---|
| Hmotnost položky | 11.68 unce |
| Rozměry produktu | 2.6 cm D x 6 cm Š x 4.4 cm V |
| Číslo modelu položky | M87 |
| Materiál těla | Hliník |
| Barva | Bílý |
| Typ konektoru | 1/4palcový (6.35mm) audio jack |
| Hardwarové rozhraní | 1/4palcový zvuk |
| Formát signálu | Analogový |
| Zdroj napájení | Elektrický kabel |
| svtage | 9 voltů |
| Baterie | 1 9V battery required (not included) |
6. Údržba
To ensure the longevity and optimal performance of your MXR M87 Bass Compressor, follow these maintenance guidelines:
- Čištění: Use a soft, dry cloth to clean the pedal's exterior. Avoid abrasive cleaners or solvents, as they may damage the finish.
- Skladování: Store the pedal in a cool, dry place away from direct sunlight and extreme temperatures. If storing for an extended period, remove any batteries to prevent leakage.
- Spojení: Periodically check all input/output jacks and power connections for any signs of wear or corrosion. Ensure cables are securely plugged in during use.
- Napájení: Always use a regulated 9V DC, center-negative power supply to prevent damage to the pedal.
7. Řešení problémů
If you encounter issues with your MXR M87 Bass Compressor, refer to the following common troubleshooting steps:
- Žádný zvuk:
- Zkontrolujte všechna kabelová připojení (přístroj, ampprostředník, síla).
- Ujistěte se, že je napájecí zdroj správně připojen a funguje.
- Ověřte, zda váš přístroj a ampZáchranné ventily fungují správně, protože se obejdou pedály.
- Check the OUTPUT knob setting; ensure it is not turned down completely.
- Nežádoucí šum/hučení:
- Ensure you are using a high-quality, isolated power supply.
- Zkontrolujte vadné kabely.
- Try the pedal in a different location to rule out electrical interference.
- Adjust the INPUT and OUTPUT knobs to avoid overdriving your amplifikátor nebo jiné pedály.
- Compression Not Engaging:
- Zvyšte VSTUP knob setting. The GAIN REDUCTION LEDs should light up when compression is active.
- Zajistěte POMĚR knob is set above its minimum value.
8. Co je v krabici
Your MXR M87 Bass Compressor package includes:
- MXR Bass Compressor Pedal
9. Záruka a podpora
For warranty information and technical support, please refer to the official MXR webnebo se obraťte na autorizovaného prodejce. Uschovejte si doklad o koupi pro případné reklamace.