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Laboratory Edition
Four sides of things you would rather not know.
A two-disc, four-side calibration set with dedicated tracks for frequency response, wow & flutter, crosstalk and anti-skating — built for owners who want proof, not guesswork, that their turntable is set up correctly.
Unitra WT2 Test Record Laboratory Edition - Vinyl Turntable Setup & Calibration
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European engineering heritage since 1961 — designed and built to be heard, not simulated.
Unitra WT2 Test Record Laboratory Edition - Vinyl Turntable Setup & Calibration
Technical specifications
| Format | Two 12" black vinyl records, 33 1/3 RPM |
| Weight | 140 g per disc |
| Side A | Frequency sweeps: 20 Hz–20 kHz at −20 dB, 20 Hz–15 kHz at −14 dB, 20 Hz–2 kHz at 0 dB, stepped response at −14 dB |
| Side B | Flat surface for anti-skating verification; silent groove for isolation testing |
| Side C | 3150 Hz wow & flutter signal; 1 kHz mono reference tone (7 cm/s lateral); crosstalk and cartridge alignment tracks |
| Side D | Logarithmic and linear frequency sweeps; frequency-modulation stability test; anti-skating sweep at 315 Hz to +10 dB |
| Included accessories | 5-step arm calibration guide (VTA, azimuth, alignment, tracking force, anti-skating); calibration template and alignment protractor |
| Compatibility | Unitra GSH-630 and GSH-801, and any turntable with a standard tonearm |
What exactly is on the four sides?
Side A carries graduated frequency sweeps from 20 Hz to 20 kHz at set reference levels. Side B has a flat anti-skating surface and a silent groove for isolation testing. Side C holds a 3150 Hz wow-and-flutter tone, a 1 kHz mono reference, and crosstalk/alignment tracks. Side D adds logarithmic and linear sweeps, a frequency-modulation stability test, and an anti-skating sweep from 315 Hz to +10 dB.
Do I need test equipment to use this record?
No. The included 5-step guide and calibration template walk you through VTA, azimuth, alignment, tracking force and anti-skating by ear and by the included visual template. A wow-and-flutter meter or oscilloscope will get you more precise readings, but they are not required for basic setup.
Will this work with my turntable, not just Unitra models?
Yes. It's explicitly compatible with Unitra's GSH-630 and GSH-801 decks, but the test bands are generic to any turntable with a standard tonearm and cartridge.
How is this different from the standard WT-1 test record?
The WT-2 Laboratory Edition expands the format to two discs and four sides, adding the dedicated wow-and-flutter band, crosstalk tracks and the anti-skating sweep test not covered by the single-disc standard edition.
What's the pressing weight and format?
Each disc is a standard-weight 140 g 12" pressing, spinning at 33 1/3 RPM — two records making up the four sides.
Can this diagnose a specific problem, like uneven channel volume?
Yes. The Side C crosstalk and alignment tracks and the 1 kHz mono reference tone are built specifically to reveal channel imbalance and misalignment.
About the Unitra WT2 Test Record Laboratory Edition - Vinyl Turntable Setup & Calibration
Professional-Grade Turntable Calibration
The Unitra WT2 Test Record Laboratory Edition is an essential diagnostic tool for achieving optimal turntable performance. Designed for audiophiles, vinyl collectors and hi-fi technicians alike, this precision test record helps you calibrate and fine-tune every aspect of your turntable setup — so you can extract the very best possible sound from your analogue system. Achieve reference-quality vinyl playback through precise, repeatable calibration.
Every Calibration You Need on One Disc
The WT2 covers the full setup workflow. Precise test tones enable accurate cartridge alignment, stylus positioning and azimuth adjustment. Stroboscopic patterns let you verify 33⅓ and 45 RPM speed accuracy. Dedicated tracks help you optimise tracking force for your specific cartridge, confirm equal output through a channel-balance test, and fine-tune anti-skate force for proper, distortion-free tracking.
Laboratory-Edition Precision
As the name suggests, the WT2 is a professional-grade pressing engineered for reliable, repeatable results — the kind of consistency a technician needs when servicing a deck or an audiophile wants when dialling in a new cartridge. Whether you're a seasoned listener or new to vinyl, the WT2 ensures your turntable is performing at its absolute best.
Why You'll Love the WT2 Laboratory Edition
- Cartridge alignment with precise test tones for stylus positioning and azimuth
- Speed calibration for 33⅓ and 45 RPM via stroboscopic patterns
- Tracking-force optimisation and anti-skate fine-tuning
- Channel-balance verification for equal left/right output
- Professional-grade pressing for reliable, repeatable results
Frequently Asked Questions
Who is the WT2 for?
Vinyl enthusiasts setting up a new turntable or cartridge, audiophiles optimising their analogue playback, and hi-fi technicians performing professional turntable service.
What can I calibrate with it?
Cartridge alignment and azimuth, speed accuracy (33⅓ and 45 RPM), tracking force, channel balance and anti-skate.
How does it differ from the WT1 Test Record?
The WT2 Laboratory Edition is a professional-grade calibration tool aimed at precise, technical setup, whereas the WT1 is designed for practical, at-home setup by ear.
WT2 Laboratory Edition Technical Specifications
Full published technical specifications for this test record are being finalised and will be added shortly. For detailed figures in the meantime, please contact us and we'll be glad to help.
