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Home
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Solid State Pre Amplifiers
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Pass Labs
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Pass Labs XS Pre
Pass Labs XS Pre
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Posted On
30.09.2026
Last Update On
30.09.2026
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English
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Pass Labs XS Pre Preamplifier—flagship model, in perfect condition, single-owner, includes original packaging and manual, silver finish.2016 model; tested and inspected by our technical department.Designed by Wayne Colburn in collaboration with Nelson Pass. Created as a "cost-no-object" project (free from budget or size constraints), it was conceived as the ideal companion for the Xs series power amplifiers (Xs 300 and Xs 150).Architecture and ConstructionDual-Chassis Configuration (Dual Mono): The system physically separates the power supply/control circuitry from the delicate audio gain stages to eliminate electromagnetic interference and background noise.Pure Class A Gain Stages: A direct-coupled circuit featuring two balanced Pure Class A gain stages, utilizing an ultra-low feedback topology and a highly simplified signal path.Oversized Power Supply: Houses a capacitor bank with exceptional cumulative capacitance (exceeding 100,000–200,000 µF)—a value equal to or greater than that of many power amplifiers—ensuring a massive energy reserve and consistent power delivery.Ultra-Premium Components: Employs gold-plated ceramic circuit boards, Silicon Carbide semiconductors, and custom-made, ultra-quiet toroidal transformers.Features and ControlPrecision Volume Control: Utilizes a relay-and-resistor attenuator managed by an optical encoder, ensuring perfect channel balance and a wide adjustment range with ultra-high resolution. Absolute Background Silence: It boasts a residual noise level of less than -122 dBV, allowing even micro-dynamic details and the subtlest nuances of the audio signal to emerge.Comprehensive Connectivity: Equipped with a wide range of both balanced (XLR) and unbalanced (RCA) inputs and outputs, polarity (phase) inversion control, and pass-through inputs/outputs (tape loop). Technical SpecificationsParameter / SpecificationValue / DetailArchitectureDual-Mono, 2-chassis design (Power Supply/Control + Audio Section)Operating ClassPure Class A (direct-coupled balanced gain stages)Gain9.5 dB (Balanced)Frequency Response2 Hz – 100 kHz (-3 dB)Harmonic Distortion (THD+N)< 0.002% @ 1 kHz, 2V RMSInput Impedance42 kΩ (Balanced) / 21 kΩ (Unbalanced)Output Impedance120 Ω (Balanced XLR) / 120 Ω (Unbalanced RCA)Residual Noise< -122 dBV (< 2 µV)Inputs6 total (individually selectable Balanced XLR or Unbalanced RCA)Outputs4 total (2x Master, 1x Adjustable Slave, 1x Tape/Pass-Through)Power Supply Capacitance200,000 µF total (100,000 µF dedicated per channel)Power Consumption55 WattsDimensions (each chassis)48.3 cm (W) x 35.5 cm (D) x 15.9 cm (H)Total Weight~36.3 kg (distributed across the two chassis)
Pass Labs XS Vorverstärker – Flaggschiffmodell, in perfektem Zustand, Einzelbesitzer, enthält Originalverpackung und Handbuch, silberne Oberfläche.Modell 2016; Getestet und inspiziert von unserer technischen Abteilung.Entworfen von Wayne Colburn in Zusammenarbeit mit Nelson Pass. Als "Cost-No-Object"-Projekt (frei von Budget- oder Größenbeschränkungen) konzipiert, wurde er als idealer Begleiter für die Xs-Serie Endstufen (Xs 300 und Xs 150) konzipiert.Architektur und KonstruktionDual-Chassis-Konfiguration (Dual Mono): Das System trennt die Stromversorgung/Steuerschaltung physisch von den empfindlichen Audioverstärkungsstufen, um elektromagnetische Störungen und Hintergrundrauschen zu vermeiden.Pure Class A Gain Stages: Eine direkt gekoppelte Schaltung mit zwei symmetrischen Pure Class A Gain-Stufen, die eine ultraniedrige Rückkopplungstopologie und einen stark vereinfachten Signalweg verwenden.Überdimensioniertes Netzteil: Beherbergt eine Kondensatorbank mit außergewöhnlicher kumulativer Kapazität (über 100.000–200.000 μF) – ein Wert, der dem vieler Leistungsverstärker entspricht oder darüber liegt – und gewährleistet eine enorme Energiereserve und eine konstante Leistungsabgabe.Ultra-Premium-Komponenten: Verwendet vergoldete Keramikleiterplatten, Siliziumkarbid-Halbleiter und maßgefertigte, ultraleise toroidale Transformatoren.Funktionen und SteuerungPräzisionslautstärkeregelung: Verwendet einen Relais- und Widerstandsdämpfer, der von einem optischen Encoder gesteuert wird und so perfekte Kanalbalance und einen großen Einstellbereich mit ultrahoher Auflösung gewährleistet. Absolute Hintergrundstille: Sie weist einen Restrauschpegel von weniger als -122 dBV auf, sodass selbst mikrodynamische Details und die feinsten Nuancen des Audiosignals sichtbar werden.Umfassende Konnektivität: Ausgestattet mit einem breiten Spektrum sowohl symmetrischer (XLR) als auch unsymmetrischer (RCA) Ein- und Ausgänge, Polaritäts- (Phasen-)Inversionsregelung sowie Durchgangsein- und Ausgängen (Bandschleife). Technische SpezifikationenParameter / SpezifikationWert /DetailarchitekturDual-Mono, 2-Gehäuse-Design (Netzteil/Steuerung + Audioabschnitt)BetriebsklassePure Klasse A (direkt gekoppelte symmetrische Verstärkungsstufen)Verstärkung 9,5 dB (ausgeglichen)Frequenzantwort2 Hz – 100 kHz (-3 dB)Harmonische Verzerrung (THD+N)< 0,002 % @ 1 kHz, 2V RMSEingangsimpedanz 42 kΩ (ausgeglichen) / 21 kΩ (unsymmetrisch)Ausgangsimpedanz 120 Ω (Symmetrisches XLR) / 120 Ω (Unsymmetrische RCA)Restrauschen< -122 dBV (< 2 μV)Eingänge6 insgesamt (einzeln wählbar: Symmetrisches XLR oder unsymmetrisches RCA)Ausgänge4 insgesamt (2x Master, 1x verstellbarer Slave, 1x Band/Durchleitung) Stromversorgungskapazität 200.000 μF insgesamt (100.000 μF dediziert pro Kanal) Stromverbrauch 55 WattAbmessungen (je Chassis) 48,3 cm (W) x 35,5 cm (D) x 15,9 cm (H) Gesamtgewicht ~36,3 kg (verteilt auf beide Gehäuse)
Preamplificador Pass Labs XS — modelo insignia, en perfecto estado, de un solo propietario, incluye embalaje original y manual con acabado plateado.modelo 2016; Probado e inspeccionado por nuestro departamento técnico.Diseñado por Wayne Colburn en colaboración con Nelson Pass. Creado como un proyecto "sin coste" (libre de limitaciones presupuestarias o de tamaño), fue concebido como el complemento ideal para los amplificadores de potencia de la serie Xs (Xs 300 y Xs 150).Arquitectura y construcciónConfiguración de doble chasis (Dual Mono): El sistema separa físicamente la fuente de alimentación/circuito de control de las delicadas etapas de ganancia de audio para eliminar interferencias electromagnéticas y ruido de fondo.Etapas de ganancia Pure Clase A: Un circuito acoplado directamente que cuenta con dos etapas de ganancia Pure Clase A balanceadas, utilizando una topología de retroalimentación ultra baja y un camino de señal altamente simplificado.Fuente de alimentación sobredimensionada: Alberga un banco de condensadores con una capacitancia acumulada excepcional (superior a 100.000–200.000 μF), un valor igual o superior al de muchos amplificadores de potencia, asegurando una reserva de energía masiva y una entrega de potencia constante.Componentes Ultra-Premium: Emplea placas de circuito cerámico chapadas en oro, semiconductores de carburo de silicio y transformadores toroidales ultra-silenciosos hechos a medida.Características y controlControl de volumen de precisión: Utiliza un atenuador de relé y resistencias gestionado por un codificador óptico, asegurando un equilibrio perfecto del canal y un amplio rango de ajuste con resolución ultra-alta. Silencio absoluto de fondo: Cuenta con un nivel de ruido residual inferior a -122 dBV, permitiendo que incluso detalles microdinámicos y los matices más sutiles de la señal de audio emergan.Conectividad completa: Equipado con una amplia gama de entradas y salidas balanceadas (XLR) y no balanceadas (RCA), control de inversión de polaridad (fase) y entradas/salidas pasante (bucle de cinta). Especificaciones técnicasParámetro / EspecificaciónValor / Arquitectura de detalleDiseñodual-mono, 2 chasis (Fuente de alimentación/Control + Sección de audio)Clase de funcionamientoClase Pura A (etapas de ganancia balanceadas acopladas directamente)Ganancia9,5 dB (Balanceado)Respuesta en frecuencia2 Hz – 100 kHz (-3 dB)Distorsión armónica (THD+N)< 0,002% @ 1 kHz, 2V RMSImpedancia de entrada42 kΩ (Balanceado) / 21 kΩ (Desbalanceado)Impedancia de salida120 Ω (XLR balanceado) / 120 Ω (RCA desequilibrado)Ruido residual< -122 dBV (< 2 μV)Entradas6 total (seleccionables individualmente XLR balanceado o RCA no balanceado) Salidas4 total (2x Master, 1x Esclavo ajustable, 1x Cinta/Paso) Capacidad de la fuente de alimentación200.000 μF total (100.000 μF dedicados por canal) Consumo de potencia55 vatiosDimensiones (cada chasis) 48,3 cm (V) x 35,5 cm (D) x 15,9 cm (H) Peso total~36,3 kg (distribuidos entre los dos chasis)
Pass Labs XS Pre Preamplifier—amiral gemisi model, mükemmel durumda, tek kullanıcı, orijinal ambalaj ve manuel gümüş kaplama içerir.2016 modeli; teknik departmanımız tarafından test edilip denetlendi.Wayne Colburn tarafından Nelson Pass iş birliğiyle tasarlandı. "Maliyetsiz" bir proje olarak (bütçe veya boyut kısıtlamalarından uzak) oluşturuldu, Xs serisi güç amplifikatörleri (Xs 300 ve Xs 150) için ideal bir eş olarak tasarlandı.Mimari ve YapıÇift Şasi Konfigürasyonu (Çift Mono): Sistem, elektromanyetik parazit ve arka plan gürültüsünü ortadan kaldırmak için güç kaynağı/kontrol devresini hassas ses kazanç aşamalarından fiziksel olarak ayırır.Saf Sınıf A Kazanç Aşamaları: İki dengeli Saf Sınıf A kazanç aşamasına sahip, ultra düşük geri besleme topolojisi ve son derece basitleştirilmiş sinyal yolu kullanan doğrudan bağlantılı bir devredir.Büyük Güç Kaynağı: Olağanüstü kümülatif kapasitansa sahip bir kapasitör bankası (100.000–200.000 μF'yi aşan) bir kapasitör bankası barındırır—bu değer birçok güç amplifikatorunun değerine eşit veya daha büyük—büyük bir enerji rezervi ve tutarlı güç teslimatı sağlar.Ultra-Premium Bileşenler: Altın kaplamalı seramik devre kartları, silikon karbid yarı iletkenler ve özel yapım, ultra sessiz toroidal transformatörler kullanılır.Özellikler ve KontrolHassas Ses Kontrolü: Optik kodlayıcı tarafından yönetilen röle ve direnç zayıflatıcısı kullanır; mükemmel kanal dengesi ve ultra yüksek çözünürlükle geniş bir ayar aralığı sağlar. Mutlak Arka Plan Sessizliği: -122 dBV'nin altında kalan gürültü seviyesine sahip, bu da mikrodinamik detayların ve ses sinyalinin en ince nüanslarının ortaya çıkmasına olanak tanıyor.Kapsamlı Bağlantı: Dengeli (XLR) ve dengesiz (RCA) giriş ve çıkışların geniş yelpazesi, polarite (fazl) ters dönüş kontrolü ve geçiş giriş/çıkışlar (bant döngüsü) ile donatılmıştır. Teknik ÖzelliklerParametre / SpesifikasyonDeğer / DetayMimarisiİki Mono, 2-şasi tasarımı (Güç Kaynağı/Kontrol + Ses Bölümü)Çalışma SınıfıSaf Sınıf A (doğrudan bağlı dengeli kazanç aşamaları)Kazanç9.5 dB (Dengeli)Frekans Yanıtı2 Hz – 100 kHz (-3 dB)Harmonik Bozulma (THD+N)< %0.002 @ 1 kHz, 2V RMSGiriş Empedansı42 kΩ (Dengeli) / 21 kΩ (Dengesiz)Çıkış empedansı120 Ω (Dengeli XLR) / 120 Ω (Dengesiz RCA)Kalıntı Gürültü< -122 dBV (< 2 μV)Giriş6 toplam (bireysel olarak seçilebilir Dengeli XLR veya Dengesiz RCA)Çıkışlar4 toplam (2x Master, 1x Ayarlanabilir Slave, 1x Bant/Geçiş)Güç Kaynağı Kapasitansı Toplam200.000 μF (kanal başına 100.000 μF ayrılmış) Güç Tüketimi 55 WattBoyutlar (her şasi) 48,3 cm (K) x 35,5 cm (D) x 15,9 cm (H) Toplam Ağırlık~36,3 kg (iki şasi arasında dağıtılmış)
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