1. Giriş
The dbx 266xs Compressor/Gate is a professional audio dynamics processor designed to enhance sound quality in studio, touring, and portable PA sound systems. It incorporates patented Overeasy® compression technology for smooth, musical performance and AutoDynamic™ attack and release controls for ease of use. This versatile unit supports both stereo and dual-mono operation, offering flexibility for various audio applications. It features professional-grade XLR and 1/4" TRS inputs and outputs, along with comprehensive visual feedback through gain reduction metering and backlit switches.
The 266xs is engineered to manage uneven audio levels, add sustain to instruments like guitars, and enhance drum sounds. It also effectively brings vocals forward in a mix, ensuring greater clarity and presence. This compressor is a valuable tool for achieving a polished and professional sound.

Şekil 1: Ön view of the dbx 266xs Compressor/Gate, showing controls for two independent channels.
2. Güvenlik Bilgileri
Lütfen bu cihazı çalıştırmadan önce tüm güvenlik talimatlarını okuyun ve anlayın. Bu kılavuzu ileride başvurmak üzere saklayın.
- Elektrik Çarpması Riski: Cihazı açmayın. İçinde kullanıcı tarafından onarılabilecek parça bulunmamaktadır. Tüm servis işlemlerini yetkili servis personeline yaptırın.
- Güç Kaynağı: Connect the unit only to the specified power supply (100-120V~ 50/60Hz, 15 Watts).
- Nem: Yangın veya elektrik çarpması riskini azaltmak için bu ekipmanı yağmura veya neme maruz bırakmayın.
- Havalandırma: Uygun havalandırmayı sağlayın. Havalandırma açıklıklarını kapatmayın.
- Atama: Üniteyi ısı kaynaklarının yakınına veya doğrudan güneş ışığına maruz bırakmayın.
- Temizlik: Sadece kuru bezle temizleyin.

Şekil 2: Arka view of the dbx 266xs, showing input/output connections and safety warnings.
3. Özellikler
The dbx 266xs Compressor/Gate offers a range of features designed for professional audio processing:
- Çok Yönlü Bağlantı: Equipped with quality XLR and 1/4" TRS inputs and outputs for seamless integration into various audio setups.
- Geliştirilmiş Ses Netliği: Optimizes vocals to stand out with improved clarity and presence in a mix.
- Profesyonel Performans: Utilizes patented Overeasy® compression technology and AutoDynamic™ attack and release controls for smooth, musical performance.
- Sidechain Insert: Provides an option for tightening and clarifying frequencies, particularly useful for instruments like bass and kick drum.
- Comprehensive Visual Feedback: Features separate precision LED displays for gain reduction, compression threshold, and gate threshold, enabling quick and accurate setup.
- Çok Yönlü Uygulama: Ideal for both studio recording and live performances, enhancing instruments and providing a polished, cohesive mix.
- Dual-Mono or Stereo Operation: Can be configured for two independent mono channels or linked for stereo processing.
- Program-Adaptive Expander/Gate: Ensures smooth release characteristics.

Figure 3: Marketing image illustrating key features and typical applications for the dbx 266xs.
4. Kurulum
4.1 Fiziksel Kurulum
The dbx 266xs is designed for standard 1U rack space installation. Its dimensions are 1.75" H x 5.75" D x 19.00" W. Ensure adequate ventilation around the unit when mounting in a rack.
4.2 Bağlantılar
The rear panel of the 266xs provides all necessary audio input and output connections. Each of the two channels features independent inputs, outputs, and sidechain inserts.
- Girişler: Connect your audio source (e.g., mixer output, microphone preamplifier) to the 1/4" TRS or XLR inputs. Both balanced and unbalanced connections are supported.
- Çıktılar: Connect the processed audio signal from the 1/4" TRS or XLR outputs to your next device in the signal chain (e.g., power amplifier, recording interface).
- Sidechain Insert: Use the 1/4" TRS sidechain insert jack to connect external processing devices (e.g., EQ, de-esser) that will control the compressor/gate. This is a Tip-Ring-Sleeve (TRS) jack where Tip is Send (output) and Ring is Return (input).
- Güç: Connect the supplied AC power cord to the IEC power inlet on the rear panel and then to a suitable AC power outlet (100-120V~ 50/60Hz).

Şekil 4: Ayrıntılı view of the rear panel, showing XLR and 1/4" TRS inputs/outputs and sidechain inserts for both channels.
5. Kullanım Talimatları
The dbx 266xs features intuitive controls for each of its two independent channels. Understanding these controls is key to achieving desired audio dynamics.
5.1 Expander/Gate Controls
- Eşik: Sets the level below which the gate will begin to attenuate the signal. Adjust this to eliminate unwanted noise or bleed.
- Oran: Determines the amount of attenuation applied once the signal falls below the threshold. Higher ratios result in more aggressive gating.
- Gate LED: Indicates when the gate is active.
5.2 Compressor Controls
- Eşik: Sets the level above which compression begins. Signals exceeding this level will be compressed.
- Oran: Controls the amount of compression applied. A ratio of 2:1 means that for every 2dB the input signal goes over the threshold, the output will only increase by 1dB.
- Overeasy® Button: Engages dbx's patented Overeasy compression, providing a smoother, more natural compression curve. When disengaged, the compression is hard-knee.
- Saldırı: Determines how quickly the compressor reacts to signals exceeding the threshold. "Fast" settings react almost instantly, while "Slow" settings allow initial transients to pass through.
- Serbest bırakmak: Controls how quickly the compressor returns to its normal state after the signal falls below the threshold. "Fast" settings result in quick release, while "Slow" settings provide a more sustained effect. The 266xs features AutoDynamic™ attack and release for simplified operation.
- Çıkış Kazancı: Adjusts the overall output level of the processed signal to compensate for gain reduction caused by compression.
- Kazanç Azaltma Ölçer: A series of LEDs indicating the amount of gain reduction (compression) being applied in dB.
5.3 Sistem Kontrolleri
- Stereo Couple Button: Links Channel One and Channel Two for stereo operation. When engaged, Channel One's controls act as the master for both channels.
- Baypas Düğmesi: Bypasses all processing for the respective channel, allowing the input signal to pass directly to the output without any compression or gating.

Figure 5: Front panel controls, illustrating the Expander/Gate, Compressor, and System controls for each channel.
6. Bakım
Proper maintenance ensures the longevity and optimal performance of your dbx 266xs.
- Temizlik: Cihazın dış yüzeyini temizlemek için yumuşak, kuru bir bez kullanın. Yüzey kaplamasına veya iç bileşenlere zarar verebileceğinden sıvı temizleyiciler veya aerosoller kullanmayın.
- Depolamak: Uzun süre kullanılmayacaksa, üniteyi serin ve kuru bir yerde, doğrudan güneş ışığından ve aşırı sıcaklıklardan uzakta saklayın.
- Havalandırma: Aşırı ısınmayı önlemek için havalandırma açıklıklarının toz ve kirden düzenli olarak temizlendiğinden emin olun.
- Kablo Bağlantıları: Periodically inspect all audio and power cables for wear or damage. Replace any faulty cables immediately.
7. Sorun Giderme
If you encounter issues with your dbx 266xs, refer to the following common troubleshooting steps:
| Sorun | Olası Neden / Çözüm |
|---|---|
| Güç yok / Ünite açılmıyor |
|
| Ses çıkışı yok |
|
| bozuk ses |
|
| Gate not working or always open/closed |
|
| Compressor not engaging or over-compressing |
|
If the problem persists after trying these steps, please contact dbx customer support or refer to the official user manual PDF for more detailed troubleshooting.
8. Özellikler
Below are the technical specifications for the dbx 266xs Compressor/Gate:
| Kategori | Şartname |
|---|---|
| Girişler | 1/4" TRS and female XLR (pin 2 Hot), Electronically balanced/unbalanced, RF filtered |
| Giriş Empedansı | Balanced: 50kΩ, Unbalanced: 25kΩ |
| Maksimum Giriş Seviyesi | +22dBu balanced or unbalanced |
| Çıktılar | 1/4" TRS and female XLR (pin 2 Hot), Impedance-balanced/unbalanced, RF filtered |
| Çıkış Empedansı | Balanced: 100Ω, Unbalanced: 50Ω |
| Maksimum Çıkış Seviyesi | +21dBu balanced/unbalanced into 2kΩ or greater |
| Yan Zincir Ekleme | 1/4" TRS Phone Jack (Tip=Output, Ring=Input) |
| Sidechain Impedance | Tip: 1kΩ (Output), Ring: 10kΩ (Input) |
| Kompresör | Threshold: -40dBu to +20dBu |
| Oran | 1:1 to Infinity:1 (Selectable Overeasy® or Hard-knee) |
| Saldırı/Bırakma | Program-dependent AutoDynamic™ |
| Genişletici/Kapı | Threshold: -60dBu to +10dBu |
| Expansion Ratio | 1:1 ila 4:1 |
| Saldırı/Bırakma | programa bağlı |
| Sistem Performansı | Bandwidth: 0.35Hz - 90kHz (+0/-3dB) |
| Frekans Tepkisi | 0.5Hz - 160kHz (+0/-3dB) |
| Gürültü | <-93dBu, unweighted (22kHz measurement band) |
| THD+N | 0.04% typical at +4dBu, 1kHz |
| İntermodülasyon Bozulması | 0.08% typical SMPTE |
| Dinamik Aralık | >113dB, unweighted |
| Çapraz konuşma | <-90dB, 20Hz to 20kHz |
| Ortak Mod Reddi | >40dB, typically >55dB at 1kHz |
| Stereo Bağlantı | True RMS Power Summing™ |
| Güç Kaynağı | 15 Watts, 100VAC 50/60Hz, 230VAC 50/60Hz |
| Çalışma Hacmitage | 100-120V~ 50/60Hz or 230V~ 50/60Hz |
| Çalışma Sıcaklığı | 0°C ila 45°C (32°F ila 113°F) |
| Fiziksel | Dimensions (H x D x W): 1.75" x 5.75" x 19" (4.5cm x 14.6cm x 48.26cm) |
| Birim Ağırlık | 4.84 lbs / 2.19 kg |
| Nakliye Ağırlığı | 6.6 lbs / 2.99 kg |

Figure 6: Official specifications sheet for the dbx 266xs, detailing electrical and physical characteristics.
9. Garanti ve Destek
dbx products are designed and manufactured to the highest standards. For detailed warranty information, please refer to the warranty card included with your product or visit the official dbx webalan.
For technical support, service, or additional information, please contact dbx customer support:
- Resmi Kullanıcı Kılavuzu (PDF): PDF indir Manuel
- dbx Webalan: www.dbxpro.com
- Phone (Sales): 1.801.568.7660
- Phone (Int'l Fax): 1.801.568.7583
- Faks (Satış): 1.801.568.7662
- E-posta: müşteri@dbxpro.com
- Adres: 8760 S. Sandy Pkwy., Sandy, Utah 84070, USA