Harmon Kardon Citation 11 Preamp

Description

The Harman Kardon Citation Eleven (often referred to simply as the Citation 11) is a classic solid-state stereo preamplifier introduced in the early 1970s as part of Harman Kardon’s prestigious Citation series. Designed to work with separate power amplifiers such as the Citation Twelve, the Citation 11 was created for audiophiles seeking precise control, wide frequency response, and flexible tone shaping in high-quality home stereo systems. Its combination of advanced engineering and professional-style equalization controls made it one of the most distinctive preamplifiers of its era.

The Citation series represented Harman Kardon’s top-tier electronics line during the late 1960s and 1970s. While earlier Citation models were tube-based, the Citation 11 was part of the company’s transition to high-performance solid-state components. Introduced around 1973 and manufactured in the United States, the preamplifier emphasized low distortion, extremely wide bandwidth, and flexible tone-shaping capabilities.

At the heart of the Citation 11 is a sophisticated control section that goes far beyond typical bass and treble adjustments. Instead of conventional tone controls alone, Harman Kardon integrated a five-band audio equalizer with selectable “hinge points” that allow users to boost or cut frequencies at several key ranges. This design allows listeners to tailor the sound to room acoustics, speaker characteristics, or recording quality. According to the manufacturer’s documentation, the equalizer can adjust energy levels by ±12 dB at frequencies such as 60 Hz, 320 Hz, 1 kHz, 5 kHz, and 12 kHz.

Another important design goal was to ensure compatibility with a wide range of phono cartridges. Many early solid-state preamplifiers could overload when used with high-output magnetic cartridges, but the Citation 11 was engineered with significant dynamic headroom to handle strong phono signals without distortion. The circuit accommodates approximately 35 dB of dynamic range, allowing it to reproduce demanding recordings cleanly and accurately.

Audio performance was also a major priority. The Citation 11 offers an exceptionally wide frequency response, extending from roughly 5 Hz to beyond 125 kHz. Total harmonic distortion is specified at less than 0.05%, which was impressive for a consumer solid-state preamplifier at the time. These specifications helped the unit achieve a reputation for clarity and detailed reproduction.

Physically, the preamplifier follows the understated industrial design typical of vintage Harman Kardon components. Its brushed-aluminum faceplate and clearly labeled controls provide a clean, professional appearance. The unit includes multiple phono and auxiliary inputs, making it suitable for complex stereo systems with turntables, tape decks, and tuners.

Today, the Citation 11 remains popular among vintage-audio enthusiasts and collectors. When paired with classic power amplifiers from the same series, it forms part of a highly respected 1970s hi-fi system known for musical detail, flexible tonal control, and solid build quality.

Review Highlights

Vintage reviewers and later evaluations noted several characteristics of the Citation 11’s sound and design.

• Stereophile described the phono stage as “clean, airy and detailed”, while noting its strong tolerance for high-output cartridges.

• The same evaluation stated that with the equalizer bypassed, the preamplifier “exhibited no perceptible hardness.”

• Early equipment profiles highlighted the Citation 11’s unusually wide bandwidth and low distortion, which helped establish it as a serious audiophile component.

These characteristics helped cement the Citation series’ reputation as one of Harman Kardon’s most ambitious hi-fi product lines.

Key Specifications

• Component Type: Stereo preamplifier

• Manufacturer: Harman Kardon

• Series: Citation

• Year Introduced: Early 1970s (approx. 1973)

• Frequency Response: 5 Hz – 125 kHz ±0.5 dB

• Extended Bandwidth: 2 Hz – 250 kHz ±1 dB

• Total Harmonic Distortion: < 0.05%

• Input Sensitivity:

  • Phono: 1.5 mV

  • Line-level: 150 mV

• Signal-to-Noise Ratio:

  • Phono: ~65 dB

  • Line: ~80 dB

• Phono Input Impedance: 47 kΩ

• Output Voltage: up to 6 V RMS

• Equalizer: Five-band ±12 dB tone shaping (60 Hz, 320 Hz, 1 kHz, 5 kHz, 12 kHz)

• Dimensions: approx. 16 × 12 × 5 inches

• Weight: about 20 lb