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JK Acoustics Passive 5

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Description

Description: Freakuence!
A homegrown classic! The JK Acoustics Passive 5 MKII lets vocals breathe with open space between the notes and a midrange that’s flawless.
Details
Serviced by the manufacturer. Top-notch!
General description
The JK Acoustics Passive 5 is a Dutch-made preamplifier designed to clearly process signals from sources such as phono preamps (MM/MC), CD players, tuners, and tape decks before further amplification. The JK Acoustics Passive 5 utilizes a discrete line amplifier and a phono stage with separate RIAA gain stages, ensuring accurate reproduction without unnecessary distortion. The Passive 5 is also available in a MkII version, in which the power supply is completely isolated from the phono stage for better isolation.
The sound of the JK Acoustics Passive 5 is often described as dynamic and rich in detail, with a spacious stereo image that makes voices sound natural. Thanks to the ability to connect both MM and MC cartridges with adjustable impedance, the midrange remains clear and free of coloration. The Passive 5 ensures that micro-details within tracks are audible without becoming harsh, while larger dynamic contrasts are preserved.
If you’re looking for a preamp like the JK Acoustics Passive 5 for your setup, you can schedule a listening session to see for yourself how this model compares to other preamps. It might also be interesting to compare it with the Passive 10 or Passive 75, or to discuss trade-in options. That way, you can find out if the JK Acoustics Passive 5 is exactly what you’re looking for.
JK Acoustics Passive 5 Specifications
Output voltage: 8 V at 0.01% THD Output impedance: 47 Ω Frequency range: DC to 100 kHz (within ±2 dB) RIAA correction accuracy: < Deviation of 0.5 dB Input impedance (Tuner/CD/MM): 47 kΩ Input impedance (MC): adjustable from 3 to 33 Ω Input sensitivity (MM): approx. 2 mV Input sensitivity (MC): approx. 0.15 mV AUX input sensitivity: 150 mV Signal-to-noise ratio (Tuner/CD/Tape): 100 dB Signal-to-noise ratio (MM): 87 dB (relative to 10 mV, with 0.001% THD) Signal-to-noise ratio (MC): 74 dB (relative to 1 mV, with 0.01% THD) Channel separation at 1 kHz at maximum output (8 V): Phono: −77 dB, Tuner/Tape/CD: −90 dB Total harmonic distortion at 1 V output: < 0.001% Outputs: AC output (for connection to an amplifier with a DC input), DC output (for an amplifier with an AC input) Preamplifier enclosure dimensions: 250 × 44 × 300 mm (W×H×D) Power supply unit dimensions: 50 × 50 × 300 mm (W×H×D) Preamplifier weight: 2.5 kg Power supply unit weight: 0.5 kg
Background Information
The JK Acoustics Passive 5 was designed with a focus on pure sound reproduction, with contributions from engineers such as Jan Klaessen. The design combines high-quality components with craftsmanship. The enclosure is crafted from carefully selected, resonance-free materials, which contributes to the sound quality. Internal wiring is made of oxygen-free copper for optimal signal transmission. Production takes place in the Netherlands, where local suppliers provide many of the materials, ensuring a high standard of quality. This combination results in a speaker that delivers natural tones and detailed sound.
Brand History
JK Acoustics was founded in the Netherlands and has focused on designing and developing high-quality audio solutions since its inception. The company started as a small workshop and has grown into a recognized name in its field. The founders of JK Acoustics were originally musicians and sound engineers, which gave their products a strong foundation in realistic sound reproduction. Their first products were primarily intended for the recording environment. Over the years, JK Acoustics has developed a range of products based on extensive technical knowledge and expertise. These products are characterized by their durable materials and extreme precision in manufacturing. The company has always focused on delivering solutions that meet the high standards of industry professionals, with accuracy and reliability at the core. Today, JK Acoustics is regarded as a trusted partner within its niche markets.

Additional information

Merken

Kleur

Questions & Answers

What is the difference between the Passive 5 MKI and Passive 5 MKII in terms of features?

The Passive 5 MKII has more extensive inputs (Phono, CD, Video, Tuner, Tape 1, Tape 2, Rec Out 1, Rec Out 2), a separate power supply enclosure, and switch panels with DIP switches to terminate MC/MM cartridges at 10, 33, or 100 ohms.

How do you select the correct input on the Passive 5 MKII?

There are seven push buttons on the front panel that are used to select the input (Phono, CD, Video, etc.).

How do you set the MM/MC mode on this preamp?

Internal switch panels with DIP switches for each channel are used to switch between MM and MC modes and to adjust the termination impedance (10, 33, or 100 ohms) for MC cartridges.

Are there separate AC and DC outputs?

Yes, the MKII has both an AC output with a coupling capacitor and a DC output with no capacitor in the signal path.

What is the frequency response of the Passive 5 MKII?

The frequency range extends from DC to 100 kHz within ±2 dB.

What are the specifications for signal-to-noise ratio and distortion?

For line/CD/tuner inputs, the signal-to-noise ratio is approximately 100 dB; for the MC phono stage, it is about 74 dB; total harmonic distortion remains below 0.001% at 1 V output.

What types of phono cartridges is the Passive 5 compatible with?

Compatible with both MM (Moving Magnet) and MC (Moving Coil) cartridges; for MC cartridges, impedances can be adjusted via internal switches.

How are volume and balance controlled on the Passive 5 MKII?

There is a single dual-knob potentiometer on the right side for adjusting both volume and balance.

What types of connectors are located on the back for inputs and outputs?

It features standard RCA inputs for all sources (Phono, CD, etc.), plus two tape inputs/outputs, and separate AC and DC outputs.

Do you need a separate power supply, or is the unit self-contained?

The preamplifier is powered by a separate power supply to minimize interference caused by magnetic fields.
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All about | JK Acoustics Passive 5

Description: Freakuence! | JK Acoustics Passive 5

A homegrown classic! The JK Acoustics Passive 5 MKII lets vocals breathe with open space between the notes and a midrange that’s flawless.

Details | JK Acoustics Passive 5

Serviced by the manufacturer. Top-notch!

General description | JK Acoustics Passive 5

The JK Acoustics Passive 5 is a Dutch-made preamplifier designed to clearly process signals from sources such as phono preamps (MM/MC), CD players, tuners, and tape decks before further amplification. The JK Acoustics Passive 5 utilizes a discrete line amplifier and a phono stage with separate RIAA gain stages, ensuring accurate reproduction without unnecessary distortion. The Passive 5 is also available in a MkII version, in which the power supply is completely isolated from the phono stage for better isolation.
The sound of the JK Acoustics Passive 5 is often described as dynamic and rich in detail, with a spacious stereo image that makes voices sound natural. Thanks to the ability to connect both MM and MC cartridges with adjustable impedance, the midrange remains clear and free of coloration. The Passive 5 ensures that micro-details within tracks are audible without becoming harsh, while larger dynamic contrasts are preserved.
If you’re looking for a preamp like the JK Acoustics Passive 5 for your setup, you can schedule a listening session to see for yourself how this model compares to other preamps. It might also be interesting to compare it with the Passive 10 or Passive 75, or to discuss trade-in options. That way, you can find out if the JK Acoustics Passive 5 is exactly what you’re looking for.

JK Acoustics Passive 5 Specifications | JK Acoustics Passive 5

Output voltage: 8 V at 0.01% THD Output impedance: 47 Ω Frequency range: DC to 100 kHz (within ±2 dB) RIAA correction accuracy: < Deviation of 0.5 dB Input impedance (Tuner/CD/MM): 47 kΩ Input impedance (MC): adjustable from 3 to 33 Ω Input sensitivity (MM): approx. 2 mV Input sensitivity (MC): approx. 0.15 mV AUX input sensitivity: 150 mV Signal-to-noise ratio (Tuner/CD/Tape): 100 dB Signal-to-noise ratio (MM): 87 dB (relative to 10 mV, with 0.001% THD) Signal-to-noise ratio (MC): 74 dB (relative to 1 mV, with 0.01% THD) Channel separation at 1 kHz at maximum output (8 V): Phono: −77 dB, Tuner/Tape/CD: −90 dB Total harmonic distortion at 1 V output: < 0.001% Outputs: AC output (for connection to an amplifier with a DC input), DC output (for an amplifier with an AC input) Preamplifier enclosure dimensions: 250 × 44 × 300 mm (W×H×D) Power supply unit dimensions: 50 × 50 × 300 mm (W×H×D) Preamplifier weight: 2.5 kg Power supply unit weight: 0.5 kg

Background Information | JK Acoustics Passive 5

The JK Acoustics Passive 5 was designed with a focus on pure sound reproduction, with contributions from engineers such as Jan Klaessen. The design combines high-quality components with craftsmanship. The enclosure is crafted from carefully selected, resonance-free materials, which contributes to the sound quality. Internal wiring is made of oxygen-free copper for optimal signal transmission. Production takes place in the Netherlands, where local suppliers provide many of the materials, ensuring a high standard of quality. This combination results in a speaker that delivers natural tones and detailed sound.

Brand History | JK Acoustics Passive 5

JK Acoustics was founded in the Netherlands and has focused on designing and developing high-quality audio solutions since its inception. The company started as a small workshop and has grown into a recognized name in its field. The founders of JK Acoustics were originally musicians and sound engineers, which gave their products a strong foundation in realistic sound reproduction. Their first products were primarily intended for the recording environment. Over the years, JK Acoustics has developed a range of products based on extensive technical knowledge and expertise. These products are characterized by their durable materials and extreme precision in manufacturing. The company has always focused on delivering solutions that meet the high standards of industry professionals, with accuracy and reliability at the core. Today, JK Acoustics is regarded as a trusted partner within its niche markets.

Questions & Answers | JK Acoustics Passive 5

What is the difference between the Passive 5 MKI and Passive 5 MKII in terms of features?


The Passive 5 MKII has more extensive inputs (Phono, CD, Video, Tuner, Tape 1, Tape 2, Rec Out 1, Rec Out 2), a separate power supply enclosure, and switch panels with DIP switches to terminate MC/MM cartridges at 10, 33, or 100 ohms.

How do you select the correct input on the Passive 5 MKII?


There are seven push buttons on the front panel that are used to select the input (Phono, CD, Video, etc.).

How do you set the MM/MC mode on this preamp?


Internal switch panels with DIP switches for each channel are used to switch between MM and MC modes and to adjust the termination impedance (10, 33, or 100 ohms) for MC cartridges.

Are there separate AC and DC outputs?


Yes, the MKII has both an AC output with a coupling capacitor and a DC output with no capacitor in the signal path.

What is the frequency response of the Passive 5 MKII?


The frequency range extends from DC to 100 kHz within ±2 dB.

What are the specifications for signal-to-noise ratio and distortion?


For line/CD/tuner inputs, the signal-to-noise ratio is approximately 100 dB; for the MC phono stage, it is about 74 dB; total harmonic distortion remains below 0.001% at 1 V output.

What types of phono cartridges is the Passive 5 compatible with?


Compatible with both MM (Moving Magnet) and MC (Moving Coil) cartridges; for MC cartridges, impedances can be adjusted via internal switches.

How are volume and balance controlled on the Passive 5 MKII?


There is a single dual-knob potentiometer on the right side for adjusting both volume and balance.

What types of connectors are located on the back for inputs and outputs?


It features standard RCA inputs for all sources (Phono, CD, etc.), plus two tape inputs/outputs, and separate AC and DC outputs.

Do you need a separate power supply, or is the unit self-contained?


The preamplifier is powered by a separate power supply to minimize interference caused by magnetic fields.

Reviews & awards | JK Acoustics Passive 5

Hifi Video Test (September 1990)

Summary: The JK Acoustics Passive 5 Mk II is described as a “calm, extremely refined amplifier” that reproduces vocals and strings very neutrally and with great emotion. The soundstage has great depth, and the bass is deep and powerful without becoming aggressive; however, during orchestral passages, a slight lack of reverberation in the background is noted.

“Listen” by Jan Kool

Summary: The Passive 5 is regarded as a preamplifier of exceptional craftsmanship, featuring perfectly separated high- and low-frequency bands in the RIAA equalization and highly refined MC adjustment. The signal-to-noise ratios are exceptionally good: well over 80 dB for MM and 74 dB for MC. Switching between inputs is handled by gold-plated relays, ensuring a smooth and refined transition. There is no tone control, but this is consistent with the unit’s purist design.

Audio & Music — MKI version

Summary: This review praises the Passive 5 for its impressive bass reproduction via the phono input, as well as its sense of space and dynamic performance. The line input performs well with CD playback. Compared to more expensive models such as the Burmester 838, it lacks some analytical sharpness, but it excels in musical experience and balance—especially considering its price.

CD

The Compact Disc (CD), like most inventions, did not appear out of thin air. After the invention of the laser in 1958, the first patent for optically readable disks was filed in 1961. The first digital video records were introduced in 1972. After a flop by Philips, the manufacturer, together with Sony, released the first CD in 1979. We do not know what it contained, but in 1982 the first CD was released for the market, it was the album Visitors by ABBA. In this year the first player became available and so began the elimination of the LP from the market. Many have literally thrown their LPs in the trash… we still see some visitors being disappointed when they tell us this. Velen hebben hun lp’s letterlijk bij het vuil gezet… sommige bezoekers zien wij nog steeds balen als ze dit vertellen.

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CD

The Compact Disc (CD), like most inventions, did not appear out of thin air. After the invention of the laser in 1958, the first patent for optically readable disks was filed in 1961. The first digital video records were introduced in 1972. After a flop by Philips, the manufacturer, together with Sony, released the first CD in 1979. We do not know what it contained, but in 1982 the first CD was released for the market, it was the album Visitors by ABBA. In this year the first player became available and so began the elimination of the LP from the market. Many have literally thrown their LPs in the trash… we still see some visitors being disappointed when they tell us this. Velen hebben hun lp’s letterlijk bij het vuil gezet… sommige bezoekers zien wij nog steeds balen als ze dit vertellen.
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