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Celebrating our 54th Year

Advanced Technology Digital Processor with Parametric Equalizer/Crossover/Delay/Limiting

Please CLICK to download the Spec Sheet (Acrobat)

Please CLICK to download the PARAMEDIC Users’ Manual (Acrobat)

  1. System
  • Exclusive - ‘its all in the timing’ - Mixing Matrix
  • Direct RS-232 or RS-485 Control PLUS Logic In and Out
  • Network Multiple Units on the Control Bus
  • Ultimate Price/Performance Ratio
  • Four Input Channels
  • Eight Output Channels
  • All Digital EQ Filters,
  • Delay, Limiting and Crossover
  • 110dB Dynamic Range
  • 24 Bit AD/DA Converters
  • Secure. No Front Panel Controls.
  • Password Protection.
  • Two Latest Generation DSP Engines
  • Servo-Balanced Inputs and Outputs
  • Optional Field Installed Seven-Day Event Timer Time Warp
  • Choose Phoenix (type) or XLR Connector Models
  • 3 Year Limited Warranty

Advanced Technology DSP Engine:
Two powerful Analog Devices’ SHARC DSPs with 32/40 bit floating point math delivers the raw computing power necessary to implement a complete multifunction audio processor. New discrete, 24 bit AD/DA converters sample the data at 48kHz assuring a wide dynamic range.

The Firmware can be updated in the field via the PC by re-flashing the unit with files downloaded from our web site.

The Filters:
White Instruments
has manufactured filters of all kinds for over fifty years from a book of transfer functions that was closed in the mid 1930’s. Our reputation for manufacturing audio filters that sound good and industrial filters that work is no accident. The secret is having the experience to select the appropriate transfer function and circuit topology for the task, then rendering the filter with a great deal of attention to craftsmanship and detail. This tradition is carried to our digital implementations.

Parametric: The Q of the parametric filters can be adjusted between 0.1 and 100. They are asymmetrical— engineered to be wider in boost mode and not as peaky sounding. Their center frequencies are adjusted in 1Hz steps between 20Hz and 20kHz. Amplitude is adjusted between -70 and +12dB in
0.1dB steps. Use the high-Q parametric filters to surgically remove feedback and room ringing. There are enough of them to do a thorough narrow-band tuning job.

H-P / L-P / A-P: Band limit your entire system or individual crossover sections (outputs) with the high-pass and low-pass filters that can have responses from 6 to 48dB/octave in 6dB steps. Their -3dB frequency is set between 20Hz and 20kHz in 1Hz steps. All-pass filters are first or second order and provide extremely short delays for loudspeaker alignment. Their frequency is also set in 1Hz steps between 20Hz and 20kHz.

Shelving: Subjectively shape your program with the 6dB/octave high and low shelving filters. Their -3dB frequency can be set between 20Hz and 20kHz in 1Hz steps and their amplitude between -12dB and +12dB in 0.1dB steps. Shelving filters can also be used for CD horn correction.

Graphic Equalizer Filters: These are the symmetrical, smoothly summing, octave band and fractional octave filters that built White Instruments’ graphic equalizer reputation.


They are generated from data included in the firmware. One filter, a group, or an entire set, can be placed on any input or output. Their frequencies are fixed on standard I.S.O. centers between 20Hz and 16kHz, and their amplitudes are adjusted between -12dB and +12dB in 0.1dB steps.

Output Levels: Individual outputs can be muted and have their polarity reversed. The 4 or 6 output levels can be assigned in up to four groups with a Master Level to control all. The Master level may also be muted.

Labeling: Name labels can be applied to all inputs, outputs, crossover sections and memories. These user assigned custom names will be displayed throughout the setup process.

Logic Inputs & Logic Outputs: The new PARAMEDIC 48 incorporates an industry first logic input so that it can receive 5V signals to change its 8 memories or 31 presets. The signal received may even be from a logic output of a different branded product (e.g. automatic mic mixer, matrix mixer, etc.). White Instruments beats AES24 to the punch to become the first product to offer true interspecies compatibility. The logic input can also incorporate a simple contact closure switch for up to 5 preset selections. Each of the 31 logic input conditions can trigger one of the unit’s 31 logic output signals to trigger relays, light LEDs, etc. or start a chain of events in an external controller.

Optional Seven-Day Real Time Clock:
The Time Warp option can be factory or field installed and adds a high degree of automation to systems that need to be reconfigured on a fixed schedule (e.g. lower the PA level at 10PM). Up to seventy events can be programmed by simply selecting a time and one of the days of the week..
Time Warp works by triggering one of the unit’s 31 Logic Events. RS-232 and RS-485 Remote Control: All PARAMEDIC 48s can have several basic functions like input and output level changes, mute and memory and preset recall remote controlled through their RS-xxx interfaces by an external controller that can be programmed to send White Instruments’ protocol through an industry standard communications port.

A Pink Noise Generator is built-into the new PARAMEDIC 48 for sound system testing. When invoked, both analog inputs are disconnected from the unit and the pink noise inserted in their place. The noise level is adjustable in 1dB or 0.1dB steps over a range of -80dB to 0dB and can be switched on and off for each output making system checkout a snap!

Mute Relays: The PARAMEDIC 48 is equipped with mute relays on each output. Their normal, power-off state is open or mute. Audio signals will not pass during a power failure or while the units are booting. Individual outputs are muted by controlling these relays through White Windows 2 software or an external processor communicating over the RS-xxx interface.



The PARAMEDIC 48 has no front panel controls for economy and security. All setup and operating functions are conducted from a PC running Windows 95/98/NT4/2000/XP/Vista and White Windows 2 software. The computer/DSP link is generic RS-232 or RS-485 requiring only an industry standard cable. No outboard interface boxes are required. The RS-xxx protocols and nonvolatile EEPROM are new and more efficient. Transfers between the PC and PARAMEDICs as well as memory I/O are 50% faster. A convenient data connector is placed on the front panel and paralleled to the rear panel. Up to 250 PARAMEDICs can be daisy-chained (in any mix of models) and controlled from one PC. The ParaMedic 48 can also be controlled via a USB port and any good USB/RS232 adaptor cable (from White Windows v2.23)

‘Its All in the Timing’ Mixing Matrix: The basic mixer allows the assignment/mixing of any input to any to all outputs. This new generation of PARAMEDIC features an Advanced Mixer giving the user delay and level control within the mixing matrix. Now pinpoint imaging and timing can be achieved in LCR and 5.1 systems by aligning the center channel loudspeaker with the left and right. Comb filtering can be all but eliminated in the audible frequency range.

Improved Input and Output Circuits and Control: The
servo-balanced analog inputs and outputs are hand trimmed at the factory for matching levels. They can be operated unbalanced without a change in gain. All outputs are equipped with precision machine-wound inductors in an
L-C circuit to absorb digital noise. Analog input and digital output levels can be individually adjusted in 0.5dB steps.

The inputs can be linked together and selected outputs can be grouped. Linked or grouped levels are adjusted together and any offsets are maintained. The standard PARAMEDIC 48 is equipped with detachable Phoenix type audio connectors. XLR equipped models are available at no additional cost.
LEFT - Input to Output Assignment Window
BELOW - Adjust Relative Output Levels and Delay


The 158 available EQ filters include parametric, high-pass, low-pass, all-pass, high shelving, low shelving and symmetrical, boost/cut octave band, two-thirds octave, one-third octave and one-sixth octave. Any filter type can be placed on any of the unit's inputs and outputs. Single filters or multiple, selected filters may be copied, moved, bypassed and deleted. All filters can be adjusted on-line so that the change can be heard (and measured)
in real-time. A new inverse button delivers the reciprocal of any setting, e.g. +3dB to -3dB.


A unique, time saving software feature allows the simultaneous creation of duplicate filters and their adjustment on all linked inputs and outputs. Change any parameter of one linked filter and the others will change accordingly.


Crossover filter sections can be created on any or all outputs, and in any order. The PARAMEDIC 48, for example, can support two 4-way, or four 2-way, or two 3-way plus two band limited full range outputs. Individual crossover sections may be bandlimited by deploying a H-P and a L-P filter or be a simple H-P or L-P response. Their characteristics can be Butterworth, Bessel or Linkwitz-Riley and may be asymmetrical and/or mixed. Butterworth and Bessel responses may be set at 6, 12, 18, 24 and 48dB/octave. Linkwitz-Riley response steps are 12, 24 and 48dB/octave. The -3dB frequencies of any section are set between 20Hz and 20kHz in 1Hz steps.

CD horn correction is applied to any output by adding a high shelving filter. The cumulative effect of the channel’s EQ filters and crossover section can be viewed while adjusting the new shelving filter.

White Windows 2 software is like using a precision machine tool for crossover setup. Pressing the Network Sum button will display the combined crossover response including any phase issues at crossover. Plus the new PARAMEDICs have the ability to store your favorite crossover setups as macros (files) for recall later.


Delay has been increased to 4.5 seconds that can be arbitrarily distributed to any and all inputs, within the Advanced Mixer and the outputs by simply adjusting it in 1mS or 0.021mS steps. Use delay on the inputs to move your cluster, use the output delays to align your loudspeakers in time in increments as small as ”. Limiting:

A digital hard or soft knee limiter with adjustable threshold and release times can be added to any and all outputs. The firmware allows linking any two or more output limiters.

Multiband Limiting: Many upscale, stand alone limiters offer multiband limiting. That is, the program is divided into several bandpass sections for the purpose of limiting. The limiter works only on the section that approaches threshold and the other sections are left untouched. To help maintain imaging in stereo, multi-way systems limiters can now be assigned in up to four linked groups.

  • Example: On a PARAMEDIC 48 the two low sections, the two mid sections and the two high sections can be linked in a multiband limiting application. In a mono application bandlimited crossover sections and limiters are used on the outputs and the linking feature is left off. The limiting function will be multiband or selective only to the crossover section that approaches threshold.




Safety Certifications:
UL, cUL.

Computer Interface:
38,400 baud. RS-232 or RS-485 (auto-sense) protocol.

105 - 132 or 210 - 260 VAC, 50/60Hz, switchable.
Detachable power cord with IEC onnector.

Number of Channels:

User Interface:
PC running White Windows 2 (software included).
Preset Select: 5V Logic or Dry contact closure.
Firmware: Firmware field reflashable.

Operating Temperature:
0 - 70 degrees C, non-precipitating humidity.

Memories and Presets:
8 memories and 31 presets, non-volatile. No battery required. 99 yr. expected life.

Front Panel LED Displays:
Unit Power On = Red.
Input and Output LED Level Indicators:
One per Input and Output.
Clip = Red.
6dB Below Clip = Amber.
Signal Present (-12dB) = Green to 6dB Below Clip
Host PC and Inter-Unit Communications:
RS-485 Protocol = Green.
Transmit = Green.
Receive = Green.

Pink Noise Source:
Digital, 1dB 20Hz - 20kHz. -80 to 0dBu.

Input Specifications:
Number of Inputs: 4
Impedance: 60k ohms, balanced. 30k ohms, unbalanced
Maximum Input Level: +24dBu
Circuit: Servo-balanced (unbalance without gain change)

Inter-Unit Networking Interface:
RS-232 or RS-485 repeater via RJ-11 (four conductor) cable (up to 250 units).

Dimensions & Weight:
19” x 3.5” (2 RU) x 10.1”, 7 lbs. (11 lbs. shipping)
48.26 cm x 8.9 cm x 25.65 cm, (5kg shipping)

Output Specifications:
Number of Outputs: 8
Impedance: 102 ohms, balanced. 51 ohms, unbalanced
Maximum Output Level: +22 dBu
Circuit: Servo-balanced (unbalance without gain change)

Logic/Preset Interface:
Two screw terminal blocks, each having 6 terminals (detatchable Phoenix type).

Warranty: Uniform Limited Warranty:
Your White Instruments signal processor is warranted against defects in manufacturing, workmanship and original components for a period of three years from the date of original purchase. During this period White Instruments will repair or replace the unit (at our option) at no charge. White Instruments is the only Authorized warranty repair facility in the United States. Outside the U.S., White Instruments' Distributors are authorized to make Warranty Repairs.

Maximum Operating Level:
+22dBu into 600 ohms

4.5 seconds arbitrarily distributed in 1mS or
0.021mS steps among the inputs and outputs.

Ordering Information:
Base Model with Phoenix type audio connectors.
PARAMEDIC 48-XLR Base Model w/ XLR audio connectors.
Other Options: PM-TW Seven-day Real time clock (plug-in) for triggering presets.

Dynamic Range:
From -80dB to +22dB

Minimum Input to Output Signal Delay:

Please Note: White Instruments reserves the right to improve our products and to change features and specifications without notice. Such changes, however will always equal or exceed the previous design specifications unless otherwise noted.

Frequency Response:
20Hz - 20kHz, 0.5dB

Hard or Soft Knee. Slow-Medium-Fast release.
Adjustable Threshold -40 to +22dBu.
Ability to link output channels (changing one changes all).

Full function copies of White Windows 2 software are available at no charge by mail or can be downloaded from our web site: Software.htm. Virtual PARAMEDICs and data files, requiring no actual units, can be created for evaluation, training, documentation and advance setup purposes.

Digital Filters:
Capacity: 158 parametric filters
Minimum Spacing: All filters, 1Hz
Frequency Range: All filters, 20Hz - 20kHz
-70dB to +12dB in 0.1dB steps
Q Range:Q=0.1 to Q=100 in 0.1 steps
High-Pass and Low-Pass:
6 - 48dB/oct. in 6dB steps
First or Second Order
6dB/octave response 12dB amplitude
Symetrical Graphic EQ:
Octave, 1/6, 1/3 & 2/3
-12dB to +12dB in 0.1dB steps

Butterworth or Bessel or Linkwitz-Riley.
6 to 48dB per octave response in 6dB steps.
Frequency adjustable in 1Hz steps.
Crossover sections can be grouped on the outputs (changing one changes all).
3 Screw terminals, (detatchable Phoenix type). XLR option, rear panel.
Computer: DB-9, front panel. Interface paralleled to RJ-11 connector on rear panel.
Chaining: RJ-11, rear panel.
Presets: Two 6 Screw terminals, (detatchable Phoenix type), rear panel.


DSP Processor and Data Converters:
Two Analog Devices SHARC DSPs with 32/40 bit floating point math. 24 bit discrete AD/DA, 48kHz conversion rate.



Front Panel Controls:



White Instruments Div. C Van R, Inc.
- P.O. Box 90003 Austin, TX 78709 U.S.A.
Phone: 512-389-5358  Fax: 512-301-3932
Email: sales@whiteinstruments.com
webmaster: Emory Straus - eestraus@mymediastaff.com