PRODUCTS

Turntables

To automate polar and directional measurements

Overview

Turntables are a valuable part of the audio measurement set up for making directional measurements, spatial measurements, sound power measurements, VR leakage assessment, beamforming verification, noise cancellation and more. SoundCheck supports, and Listen provides several turntables from different manufacturers such as Portland Tool & Die, Brüel & Kjær, and Outline to match your testing requirements and budget.

Check out our Turntable Comparison Table for more information. All turntables here can be easily controlled from within SoundCheck.

The Portland Tool & Die MDT-4000

For most audio applications, the new Portland Tool & Die MDT-4000, available exclusively from Listen, is one of the most accurate and feature-filled turntables available. Designed specifically for audio measurements, it packs a host of usability and safety features, along with high precision and low maintenance in a compact and lightweight package.

High Precision

The MDT-4000 offers a resolution of 0.1°, one of the most accurate on the market.

Easy Set-Up and Operation

The turntable has a built in level, along with 4 adjustable feet, making it quick to perfectly level and align equipment. Clearly visible degree markings provide quick visual confirmation of position and make it easy to align accessories with the turntable. Mounting holes at 3”, 9” and 15” diameter provide a variety of mounting options, and a center cable pass-through prevents tangling. The turntable retains position memory across power cycles, so the display remains synchronized with the actual position, even when the turntable is turned off.

Flexible control options

4 control options offer ultimate flexibility:

USB – easy control for short distances
RS232 for longer distances and backwards compatibility with LT360
RestAPI provides long distance communication via LAN, enabling control via a webpage using a laptop or smartphone and enabling custom control applications to be written.

Full control from within SoundCheck (naturally!)

Quiet operation

Silent at rest, and low-noise when rotating, it is ideal for audio applications. Variable torque enables slower rotation speeds to be used for quieter operation when measuring during rotation.

Packed with safety features

With emergency stop buttons on the front panel and in the software, plus an optional remote button for when the turntable is not within reach, your valuable products and instrumentation are protected. An automatic stall detection mechanism identifies if an obstruction is preventing the turntable from reaching its target position and both warns the user and stops the drive to prevent damage to equipment.

Low maintenance

A maintenance-free worm drive requires no lubrication, making this turntable maintenance-free, an advantage when it is remotely located, for example in an anechoic chamber

Right-sized

Supports weights of up to 100kg in either compression or inverted orientation, making it suitable for the majority of audio applications. Weighing in at just 12kg, it is easy for one person to move around the laboratory.

Competitively priced

The MDT-4000 is competitively priced with other turntables, and considerably less expensive than others offering the same advanced functionality.

Specifications

Motion
Torque	5 - 20 Nm / 3.7 to 14.7 lb-ft
Angle Accuracy	0.5°
Step Resolution	0.1°
Speed of Rotation	Up to 3 RPM
Direction	clockwise or counter-clockwise
Max Axial Load (compression)	100 kg / 220 lb
Max Axial Load (upside-down)	100 kg / 220 lb
Max Radial Load	75 kg / 165 lb
Max Bending Moment	30 kgm / 66 lb-yd
Drive system	maintenance free irreversible worm drive
Acoustic Noise
Typical Idle Noise Level	Silent (<30 dBPa(A))
Typical Noise Level during Operation	<50 dBPa(A)
Power
External DC Power Input	12 – 30 V DC
Mains Supply	90 – 264 V AC, 47 – 64 Hz (adaptor included)
Physical
Height	100 mm /3.9″ (without feet)
Width	437 mm / 17.2″
Depth	437 mm / 17.2″
Rotating disk / table plate diameter	400 mm/ 15.7″
Central bore	50 mm/ 1.9″
Weight	12 kg/ 26.5 lb
Top Mounting Holes	8 x M6 on 80 mm / 3.14" diameter 8 x M6 on 228 mm / 8.97" diameter 8 x M6 on 380 mm / 14.96" diameter
Bottom Mounting Holes	4 x M10 on 274 mm / 10.78" diameter
Mounting configurations	Horizontal, Vertical, Upside-down
Markings	every 1°
Center cable pass-through	Yes
Control
Local	Front panel buttons and touch screen
Remote	USB, RS232, LAN
Command sets supported	LT-360, LAN REST API
Safety
Emergency Stop	on front, remote option available
Integrated Chassis level	Yes
Adjustable leveling legs	38mm / 1.5" adjustment range

Turntable Comparison

These turntables can all be controlled from within SoundCheck. Use this useful comparison table to help identify a turntable that meets your performance and price requirements. We are happy to quote any of these products.

	PT&D MD-4000	B&K TYPE 9640-A-001	Outline ET-250	Outline ET-50	LinearX LT-360
Photo
Cost
Motion
Torque	5 - 20 Nm / 3.7 to 14.7 lb-ft	5 - 20 Nm / 3.7 to 14.7 lb-ft	250 Nm / 194 lb-ft	50 Nm / 37 lb-ft	100 Nm /74 lb-ft
Step Resolution	0.1°	0.1°	0.5°	0.5°	<0.002°
Speed of Rotation	Up to 3 RPM, programmable	Up to 3 RPM, programmable	0.35 RPM	1.75 RPM	0.1 to 3 RPM, programmable
Max Axial Load (compression)	100 kg / 220 lb	100 kg / 220 lb	1000 kg /2200 lb	200 kg / 440 lb	450 kg / 1000 lb
Max Axial Load (inverted)	100 kg / 220 lb	100 kg / 220 lb	200 kg / 440 lb	40 kg / 88 lb	n/a
Max Radial Load	75 kg / 165 lb	75 kg / 165 lb	250 kg / 550 lb	250 kg / 550 lb	136 kg /300 lb
Max Bending Moment	30 kgm / 66 lb-yd	30 kgm / 66 lb-yd	50 kgm / 110 lb-yd	5 kgm / 11 lb-yd	n/a
Acoustic Noise
Typical Idle Noise Level	silent (<30 dBPa(A))	silent (<30 dBPa(A))	silent	silent	silent
Typical Noise Level during Operation	<50 dBPa(A)	<50 dBPa(A)	not specified	not specified	50dBspl @ 2M, 1 RPM, ANSI-A Weighted
Control
Local	Front panel buttons and touch screen	Front panel buttons and touch screen	Front panel buttons	Front panel buttons	Front panel buttons
Remote	USB, RS232, LAN	USB, RS232, LAN	LAN, TTL pulse	LAN, TTL pulse	USB, RS-232, Analog
Command sets supported	LT-360, LAN REST API	B&K Type 9640 legacy commands	Standard Ethernet Protocol	Standard Ethernet Protocol	LT-360
Safety
Emergency Stop	on front, remote option available	on front, remote option available	No	No	No
Integrated Chassis level	Yes	Yes	No	No	No
Adjustable leveling legs	1.5" adjustment range	1.5" adjustment range	No	No	No
Physical
Height	100 mm / 3.9″ (without feet)	100 mm / 3.9″ (without feet)	107 mm / 4.5″	107 mm / 4.5″	104 mm / 4.1"
Width	437 mm / 17.2″	437 mm / 17.2″	350 mm / 13.75″	350 mm / 13.75″	457 mm / 18.0"
Depth	437 mm / 17.2″	437 mm / 17.2″	450 mm / 17.75″	450 mm / 17.75″	457 mm / 18.0"
Weight	12 kg / 26.5 lb	12 kg / 26.5 lb	21.5 kg / 47 lb	13.8 kg / 30.4 lb	16 kg / 35 lb
Rotating disk diameter	400 mm / 15.7″	400 mm / 15.7″	350 mm / 13.75”	350 mm / 13.75”	406 mm / 16.0"
Central bore	50 mm / 1.9″	50 mm / 1.9″	n/a	n/a	38 mm /1.5"
Top Mounting Holes	8 x M6 on 80 mm / 3.14" Ø 8 x M6 on 228 mm / 8.97" Ø 8 x M6 on 380 mm / 14.96"Ø	8 x M6 on 80 mm / 3.14" Ø 8 x M6 on 228 mm / 8.97" Ø 8 x M6 on 380 mm / 14.96"Ø	1 x M20 at center 8 x M8 on 244 mm / 9.6" Ø	8 x M8 on 244 mm / 9.6" Ø	4 x 1/4-20 on 76.2 mm / 3" Ø 8 x 1/4-20 on 228 mm / 9" Ø 8 x 1/4-20 on 380 mm / 15" Ø mm
Bottom Mounting Holes	4 x M10 on 274 mm / 10.78"	4 x M10 on 274 mm / 10.78"	8 x M8 on 244 mm / 9.6" Ø (on chassis) 1 x M20 (for counterweight use only)	8 x M8 on 244 mm / 9.6" Ø (on chassis)	4 x 1/4-20 on 154.4 mm / 6" Ø 4 x 1/4-20 on 304.8 mm / 12" Ø
Markings	every 1°	chassis zero	none	none	none
Center cable pass-through	Yes	Yes	No	No	Yes
Power Requirements
External DC Power Input	12 – 30 V DC	12 – 30 V DC	12 - 15VDC		50W, Universal PFC SMPS
Mains Supply	90 – 264 V AC, 47 – 64 Hz	90 – 264 V AC, 47 – 64 Hz	90-250 VAC – 50/60 Hz	90-250 VAC – 50/60 Hz	85-265VAC, 50/60Hz
Data Sheet /More Information	MDT-4000 Product Information	B&K Type 9640-A-001 Product Information	Outline ET-250R2-3D Turntable Product Information	Outline ET-50-3D Turntable Product Information	n/a

Setup Diagram

Registration required

Turntables

To automate polar and directional measurements

The Portland Tool & Die MDT-4000