Vintage hi-fi equipment from the golden era of audio engineering was built to an incredibly high standard. Many classic components from brands like Sony ES, Accuphase, Wadia, and Esoteric are still capable of outstanding sound quality decades after they were manufactured.

However, one critical factor affects nearly all vintage electronics: aging electrolytic capacitors.

At ES Audio Store, we offer professional recap service designed to restore the reliability, stability, and sonic performance of classic audio equipment.

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What is a Recap?

A recap refers to replacing aging electrolytic capacitors in an audio component.

Electrolytic capacitors contain liquid electrolyte that gradually dries out over time. After 20–30 years, their electrical properties often drift significantly from their original specifications.

Typical issues caused by aging capacitors include:

• Increased noise and distortion
• Reduced bass control
• Poor channel balance
• Power supply instability
• Startup issues
• Servo instability in CD players
• Failure of audio circuits

Even if a component still works, its performance may be far from what the original engineers intended.

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Why Recapping Matters for Vintage Audio

Most classic hi-fi equipment from the 1980s and 1990s is now 30–40 years old. Many capacitors in these units were rated for a service life of around 2000–5000 hours at rated temperature.

In practice this means:

• The electrolyte slowly dries out
• ESR (Equivalent Series Resistance) increases
• Capacitance decreases
• Leakage current rises

In audio circuits this can significantly affect sound quality and reliability.

A proper recap restores the electrical characteristics of the circuit and allows the component to perform much closer to its original design.

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Our Recap Philosophy

At ES Audio Store, we do not believe in blindly replacing every capacitor in a unit without evaluation.

Instead we follow a structured service approach:

1. Initial inspection and diagnostics
2. Measurement of critical capacitors
3. Replacement of aging or critical components
4. Use of high-quality audio-grade components
5. Full functional testing and calibration

This ensures reliability while preserving the original character of the equipment.

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High-Quality Components

For recapping we use carefully selected capacitors from reputable manufacturers such as:

• Nichicon
• Panasonic
• ELNA
• Würth Elektronik

Where appropriate we select audio-grade series designed specifically for signal paths and analog circuits.

Power supply sections may receive low-impedance or high-ripple capacitors to improve stability and reliability.

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Recap Service for Different Components

Our recap service can be applied to many types of vintage hi-fi equipment.

1. CD Players

Typical recap areas include:

• Power supply filtering
• Servo board capacitors
• Analog audio stage
• DAC power supply decoupling

This can improve stability, reduce noise, and restore proper analog performance.

Amplifiers and Preamplifiers

Common areas addressed:

• Power supply capacitors
• Local decoupling capacitors
• Signal path electrolytics
• Protection and relay circuits

A recap often improves bass control, channel balance, and noise floor.

DAT Recorders and Tape Decks

Recapping can restore:

• Servo stability
• Analog playback circuits
• Power supply reliability

Many classic digital recorders rely on aging capacitors that can cause unpredictable faults.

Tuners

Typical service includes:

• Power supply recap
• Audio output stage capacitors
• Control circuitry stabilization

This helps restore long-term reliability.

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Levels of Recap Service

At ES Audio Store, recap work can be performed at different levels depending on the component and customer preference.

Preventive Recap

Selective replacement of critical capacitors to ensure reliability.

Typical focus:

• Power supply
• Known failure-prone capacitors
• Heat-stressed components

Full Recap

Replacement of most electrolytic capacitors in the unit.

Recommended for:

• High-value collectors’ equipment
• Components over 30 years old
• Units intended for long-term ownership

Recap + Analog Stage Upgrade

For certain models we combine recap work with our upgrade packages:

• BASIC ANALOG UPGRADE
• PREMIUM ANALOG STAGE
• SIGNATURE ES AUDIO STORE MODIFICATION

These upgrades can further improve the performance of classic Sony ES components.

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Why Choose ES Audio Store

We specialize in high-end vintage Sony ES equipment, one of the most respected hi-fi series ever produced.

Our work is based on:

• Service manuals and original specifications
• Careful component selection
• Extensive experience with classic ES components
• Professional testing and calibration procedures

Every serviced unit is treated as a precision audio instrument.

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Recap Service Request

If you own a vintage hi-fi component that deserves restoration, we would be happy to help.

Please contact us with the following information:

• Brand and model
• Known issues or symptoms
• Photos if possible
• Your location

We will evaluate the unit and provide recommendations for appropriate service.

ES Audio Store
Vintage High-End Audio Specialists

Restore the sound. Preserve the engineering.