Speaker & Headphone Audio Test System

FINE QC™ 2019 Speaker Production Test

"See what You Hear"



The new Automation module is used for seamless interfacing with automatic production lines.  For Automatic End Of Line (EOL) testing.

TTL Automation I/O Interface. The TTL signals are used for communication with automatic production lines. PASS / FAIL signals from the QC test can be read/written from/to associated control electronics of an automatic or semi-automatic assembly line.

A separate USB Interface can be added giving total access to all reject types, which can then automatically be sorted on the assembly line

This End-of Line QC test system will test (Smart-) Loudspeaker Systems and drivers, headphones, microspeakers PLUS Microphones, Amplifiers and crossovers.

FINE QC includes the effective self-learning Rub & Buzz method FINEBuzz, which is proven by several customers as the best in the industry by replacing human testing, FINE QC will do a complete test including Rub & Buzz in 0.5-1 second. Our customers say: "See what You Hear with FINE QC" 

Other features are Automatic Golden Average Speaker finding, Acoustic Pair matching, Auto-Saving of all measurements for Statistics and USB controlled FINE Hardware with Phantom mic + AD/DA and Power Amp providing simultaneous SPL & impedance Test w/o switching

Demo Video

6.5in Woofer with rubbing Voice Coil. FINEBuzz shows this in red

Download FINE QC Manual (3.6 Mb)

FINE QC / Headphone with Noise Cancel Test   >>

Go to the Headphone/headset Test page

Download FINE QC Features (0.1 Mb)

• QC testing Loudspeakers/Drivers, (incl. Bluetooth +Micro), Microphones, Crossovers & Amplifiers
• Complete QC Test: SPL, Sensitivity, Polarity, Impedance +Rub & Buzz < 1 second
• Automatic “Golden Average unit” and Automatic saved Statistics
• Automatic pairing of units, also ideal for finding matching units for headphones
• FINEBuzz 3.0 (Rub & Buzz) Test, “Best in the Industry” – Just measure some Good and Bad units
• Average Sensitivity (0.1dB accuracy) and TS parameters
• Reading Barcode serial number will start test
• Automatic printing of serial number, Pass/Fail and for example sensitivity
• All measuring is handled by the hardware giving extremely accurate measurements
• GRAS and LOUDSOFT (DPA) microphones connect directly without extra preamplifiers
• Accurate low Latency Bluetooth measurements due to PC not involved in measurement
• Directly measures crossover circuits and (Class D) Amplifiers
• FINE QC Viewer available for checking and making setups for FINE QC
• Drawings for 3 Test Boxes included
• New multi-channel 19” USB-2 FINE Hardware 3:
     o 3 Microphone input channels with selectable 48V Phantom power
     o Main amplifier 25W, balanced
     o XLR balanced Line Out and separate stereo Headphone amplifier
     o Built-in power supply and Power switch on front
     o Same factory calibrated hardware for FINE QC and FINE R+D
     o For windows 7, 8 and 10 (+64bit) with dedicated Windows drivers

Hold the mouse over a picture to view it in the window below:
QC Preprod Average
Batch / Golden Average
Golden Average No 8 found
Auto Good /Bad Rub & Buzz
TS Paramters
(Class D) Amplifier test
DUT Electronics Testing 

LOUDSOFT  FL1 Microphone, made in Denmark.
Very stable pre-polarized condenser microphone for 48V Phantom power.


Download FL1 Data Sheet (0.2 Mb)


FINE Hardware 3 with 3 microphone inputs
Optional 48V Phantom Power
FL1 & GRAS Microphones connects without preamp
Built-in 25 W amplifier
USB2 control

LOUDSOFT - Agern Alle 3 - 2970 Horsholm - Denmark - Phone: (45) 4582 6291 - Fax: (+45) 4576 5708 - E-mail: dl@loudsoft.com