AKG C451 EB Pair

Short Description:

Renowned small diameter capsule condensor mic kit. In Used, Excellent condition

What We Think:

The AKG C451 EB is an iconic workhorse of analog recording history, widely regarded as one of the finest modular small-diaphragm FET condensers ever manufactured. Introduced in the late 1960s as part of AKG’s original Condenser Modular System (CMS), the C451 EB built its reputation on lightning-fast transient response, crystalline high-frequency extension, and remarkable low-noise performance.

What sets the vintage C451 EB apart from modern recreations is its modular adaptability and discrete transformer-coupled architecture. Pairing the EB body (featuring built-in high-pass filtering) with classic capsules like the legendary CK1 cardioid, it delivers an instantly recognizable "snappy" top-end sheen that lets acoustic guitars, hi-hats, drum overheads, and grand pianos slice through dense mixes without ever needing top-end EQ boosting.

Manufacturer Description:

The AKG C451 EB is a modular, high-performance small-diaphragm condenser microphone system engineered for high-precision recording and sound reinforcement applications. Introduced in the late 1960s as part of AKG’s legendary CMS (Condenser Modular System), the C451 EB became an industry standard for acoustic instruments, overheads, and high-transient source capturing, renowned for its ruler-flat response, fast transient speed, and low self-noise.

The C451 EB system is built around the robust EB preamplifier body, featuring a switchable two-position low-frequency roll-off filter (75 Hz and 150 Hz) and a field-serviceable modular architecture. The body interfaces with AKG’s interchangeable "CK" capsule series via a precision screw thread—most famously paired with the CK1 cardioid capsule—allowing engineers to tailor polar patterns, attenuation, and extension angles using a wide range of specialized capsules, inline pads (A51), and swivel adapters.

• Modular System Architecture: The threaded EB body connects seamlessly to a wide variety of interchangeable AKG capsules, including the classic CK1 (cardioid), CK2 (omni), CK3 (hypercardioid), and CK8/CK9 (shotgun).

• Switchable High-Pass Filter: Integrated two-position low-frequency roll-off (-12 dB/octave at 75 Hz or 150 Hz) compensates for proximity effect and eliminates low-end rumble.

• Precision Field-Effect Transistor (FET) Circuitry: Transformer-coupled output design utilizing discrete FET electronics ensures high headroom, minimal distortion, and wide dynamic range.

• Fast Transient Response: The ultra-lightweight gold-sputtered Mylar diaphragm delivers exceptional accuracy on complex high-frequency transients, making it an iconic choice for acoustic guitar, hi-hats, drum overheads, and piano.

• Standard Phantom Powering: Operates reliably across standard 9V to 52V phantom power supplies (DIN 45596).

Included in this kit:

• C451 EB Microphone Body (x2)
• CK1 Cardioid Capsule (x2)
• CK2 Omnidirectional Capsule (x2)
• A50/10 -10dB Pad (x2)
• A51 Swivel Attachment (x2)
• SA15/1 Microphone Stand Clip (x2)
• H15 Spider Shock Mount (x2)

Specifications:

• Polar Pattern: Cardioid (with CK1 capsule attached)
• Frequency Range: 20 Hz – 20,000 Hz
• Sensitivity: 9.5 mV/Pa (-40 dBV)
• Equivalent Noise Level: 18 dB-A
• Maximum SPL: 138 dB SPL (for 0.5% THD)
• Low-Frequency Filter: Flat, -12 dB/octave @ 75 Hz, or -12 dB/octave @ 150 Hz
• Impedance:$\le 200\ \Omega$
• Recommended Load Impedance:$\ge 500\ \Omega$
• Connector: 3-pin XLR (Male)
• Dimensions: 19 mm diameter $\times$ 147 mm length (0.75" $\times$ 5.8")
• Weight: 125 g (4.4 oz)