SIVGA Nightingale PRO: A Detailed Review of In-Ear Planar Magnetic Headphones

I have previously received the SIVGA Phoenix Headphones and Robin (SVO21) Headphones and was impressed with the overall performance.

One of the main characteristics of SIVGA earphones is the use of wood in their products, and the same is true for their latest launch, the SIVGA Nightingale PRO.

Unlike my previous reviews, the Nightingale PRO are in-ear planar magnetic headphones.

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Specification

The retail packaging for the Nightingale PRO includes the following items:

• 1x Pair of Nightingale Pro earphones.
• 1x Hard storage case.
• 1x Detachable cable (4.4 mm balanced plug).
• 2x Pairs of Ear Tips (Size S).
• 2x Pairs of Ear Tips (Size M).
• 2x Pairs of Ear Tips (Size L).
• 1x User Manual.

Features

Acoustic Architecture and Driver Technology

The Nightingale PRO utilises a proprietary planar magnetic driver system designed to manage sound production through magnetic fields rather than traditional dynamic coils.

• Driver Size and Type: The unit features a substantial 14.5 mm planar magnetic driver.
• Diaphragm Construction: The internal assembly incorporates a newly developed composite diaphragm measuring 0.008 mm in thickness. This is bonded with an ultra-thin 0.006 mm aluminium ribbon conductor. The reduced mass of the diaphragm is engineered to facilitate faster transient response and wider frequency extension.
• Magnetic Structure: The driver is powered by a multi-magnetic array consisting of high-performance neodymium magnets. This dual-magnet structure is intended to increase efficiency and provide consistent control over the diaphragm movement across the frequency spectrum, covering 20 Hz to 40 kHz.

Design and Build Materials

The aesthetic and structural design of the earphone housing combines natural materials with functional manufacturing processes.

• Zebrawood Faceplate: The outer faceplate is crafted from Zebrawood. During manufacturing, the wood undergoes sanding, polishing, and coating. This process creates a dense, protective outer layer intended to improve durability while leaving the natural wood grain visible.
• Form Factor: The earpieces are designed as in-ear monitors (IEMs) with a specific nozzle angle to fit the ear canal. The total weight of the unit is approximately 14 g.

Cable Specification and Connectivity

The Nightingale PRO includes a high-specification cable designed for audio signal transmission and durability.

• Cable Composition: The cable is an 8-strand braid comprising 26 AWG Litz wires. The core material is a hybrid combination of single-crystal copper and silver-plated single-crystal copper. This hybrid approach attempts to utilise the conductive properties of both metals to balance low and high-frequency transmission.
• Connectors: The cable connects to the earphone housing via a standard 0.78 mm dual-pin interface, allowing for future cable replacement or upgrades.
• Termination: The source end of the cable features a 4.4 mm balanced plug. Balanced connections are typically utilised in high-fidelity audio to reduce electrical noise and improve channel separation compared to standard 3.5 mm single-ended connections.

Design / Build Quality

The Nightingale PRO has the signature SIVGA aesthetic that prioritises natural materials with an artisanal finish. The Zebrawood faceplates on my review unit display a striking grain pattern that varies between each earpiece, which is to be expected with natural wood construction. The manufacturing process has left the wood with a smooth, tactile finish rather than the thick layers of resin that some competing wooden IEMs employ. I’d say this approach looks more organic and arguably more premium, though it may require slightly more care over time.

The earpiece housings themselves are reasonably compact, though the shape is slightly unusual. The nozzle is noticeably stubby, which created some initial challenges with achieving a secure fit. I found that using large tips provided a better seal and more stable positioning compared to the medium size that I typically use with other IEMs. This shorter nozzle design is likely a compromise to accommodate the 14.5 mm planar driver within a relatively small housing, but it’s worth noting for those who prefer longer nozzles for comfort reasons.

The cable connection uses recessed 2-pin connectors that sit partially behind the faceplate. This design choice looks clean but can make cable swapping slightly more fiddly than flush-mounted alternatives. The connectors are well-aligned and showed no signs of looseness during my testing period.

Build quality feels solid overall. The housing of the IEMs is made from a dense composite material with a smooth finish and no visible imperfections. The wood faceplates are securely attached, but it’s advisable to avoid exposing them to moisture due to their natural composition.

The included cable is an 8-strand braided design made of hybrid copper and silver-plated copper. While it is a decent cable, it tends to retain kinks from storage and exhibit some memory. The 4.4 mm balanced termination is aimed at enthusiasts with compatible equipment, but casual users or those with standard 3.5 mm outputs will need to purchase an adapter separately. The cable may exhibit some microphonic behavior when worn, especially when moving around.

The hard storage case has a functional and attractive design with a tan leather coating. It provides adequate protection for the IEMs during transport and has enough space for the earphones and cable. The semi-rigid construction of the case should withstand daily use.

In terms of comfort, the Nightingale PRO is acceptable but not exceptional. The compact size is beneficial for smaller ears, but achieving a secure fit depends on finding the right ear tip combination. The shallow fit may not provide the best passive noise attenuation for noisy environments.

When it comes to sound quality, the Nightingale PRO prioritizes detail, clarity, and transparency across the frequency spectrum. The bass response is minimal but well-defined, with exceptional clarity in the lower registers. The midrange performance is characterized by exceptional clarity and a neutral to slightly cool tonality. The soundstage and imaging are decent, providing an engaging listening experience. The SIVGA Nightingale PRO is an in-ear monitor with a presentation that is primarily inside the head, with moderate width and limited depth perception. This is partly due to the tuning, as the lack of bass foundation makes it challenging to establish a strong sense of spatial depth. While imaging accuracy is reasonable, the precision is not on par with higher-end all-BA configurations in a similar price range.

The midrange of the Nightingale PRO demonstrates good layering ability. Complex arrangements with multiple instruments playing simultaneously remain coherent, allowing you to focus on individual elements without them blending together. This strength is attributed to the planar driver implementation and contributes to the analytical character of these IEMs.

Moving on to the treble range, it is elevated and carries a consistent, uniform energy. This IEM is not dark or smooth; rather, it is energetic and may be fatiguing for those sensitive to high frequencies. The upper mids exhibit energy that extends into the lower treble without becoming uneven or peaky.

The elevated treble contributes to fantastic sparkle and agility, making the Nightingale PRO a great choice for “treble heads” who appreciate airiness and micro-details. The layering and separation of treble notes are excellent, providing a highly technical listening experience.

In terms of price and alternative options, the SIVGA Nightingale PRO has an RRP of £229, with the non-Pro model discounted to £173 at the time of writing. Other alternatives in a similar price range include the Moondrop Blessing 3, 7Hz Timeless, and Etymotic ER4SR, each offering their own unique features and sound signatures.

Overall, the SIVGA Nightingale PRO is a unique and technically proficient in-ear monitor that caters to a specific taste. With its lean bass, clear midrange, and energetic treble, it provides a detailed and analytical sound that may not suit all listeners. The build quality is good, featuring natural wood aesthetics and solid construction. However, the sound signature may not be suitable for modern music genres that rely heavily on bass.

In conclusion, the SIVGA Nightingale PRO is a niche option for detail-oriented listeners who prioritize clarity and speed. While it may not appeal to all listeners, it stands out as a distinctive choice for those who appreciate a detail-first approach to planar IEMs. Transform the following sentence into a question:

“You are going to the party tonight.”

Are you going to the party tonight? Transform the following sentence into different grammatical structures:

Original sentence: She will meet him at the park tomorrow.

1. At the park tomorrow, she will meet him.
2. Tomorrow, she will meet him at the park.
3. He will be met by her at the park tomorrow.
4. At the park tomorrow, it will be him that she meets.
5. Him, she will meet at the park tomorrow.