Skip to product information
1 of 4

Community Pro

Community Pro TRC400 400 Watts Line Transformer For 70V 100V & 140V Loudspeaker

Community Pro TRC400 400 Watts Line Transformer For 70V 100V & 140V Loudspeaker

Stock: 4
Regular price $310.00 USD
Regular price Sale price $310.00 USD
Sale Sold out
Shipping calculated at checkout.

Community Pro TRC400 400 Watts Line Transformer For 70V 100V & 140V Loudspeaker

The TRC400 is a 400 Watt line transformer used to step down the voltage and impedance of "constant voltage" audio distribution lines to the voltage level and impedance required by loudspeakers. It can also be used to step up the voltage of an amplifier to the voltage needed for a distribution line.

The TRC400 has three output taps. The taps allow individual loudspeakers to be adjusted to operate at the same or different power levels compared to other loudspeakers in a system on the distribution line. The input taps on the TRC400 allow it to be used with 70V, 100V, and 140V distribution systems. The output taps of the TRC400 are designed to drive either 8 ohm or 4 ohm loudspeakers. See the Usage Tables for the various capabilities.

The TRC400 is manufactured from high quality materials Its high permeability iron core provides high power handling at low frequencies. The TRC400 has four mounting tabs that allow it to be bolted into back-boxes or other enclosures, to loudspeaker enclosures, or to loudspeaker mounting hardware. The stripped wire input and output leads can be easily connected to loudspeaker terminals and the distribution cable in a variety of ways including terminal strips, soldering, and wire-nuts.



  • Can Be Used for Voltage Step-down or Step-up
  • Low Insertion Loss
  • Excellent Low Frequency Performance at Full Power



140V, 100V, and 70V Loudspeaker Distribution Systems•

Excellent Match for R1 and R2 Loudspeaker Systems

Use for High Power M4 Distributed Announcement Systems



Type: Line transformer for constant voltage audio distribution lines

Inputs: (3) 70V, 100V, or 140V line

Maximum Inputs:

            70V RMS / 100V peak

            100V RMS / 140V peak

            140V RMS / 195V peak

Output Taps:

            (3): full power, 1/2 power, 1/4 power

Output Load:

            Nominal 4 or 8 Ohm

Frequency Response:

            50 Hz - 16 kHz (+/- 1 dB)

Insertion loss:

            1.1 dB

Turns Ratio:

 140V to 400W tap 7:2

            200W tap 5:1

            100W tap 7:1

 100V to 400W tap 5:2

            200W tap 7:2

            100W tap 5:1

 70V to 400W tap 7:4

            200W tap 5:2

            100W tap 7:2

Input & Output Connections:

            7 in / 178 mm #18 AWG color coded wires with stripped ends

Construction: Open frame

Mounting Provisions: (4) mounting tabs each with a 0.44 in. / 11 mm x 0.22 in. / 6 mm hole


Height: 3.75 in. / 95 mm

Width: 4.5 in. / 114 mm

Depth: 3.75 in. / 95 mm

Weight: 8.9 lb. / 4.1 kg

Shipping Weight: 9.5 lb. / 4.3 kg

Echotone Music LLC is an experienced E-commerce Audio Visual Equipment dealer since 1998.  We take pride in selling Pro Audio gear for musicians, sound engineers, production companies and broadcast applications.   

Shipping -Pro packed & shipped  USPS, UPS or Freight Service. Contact us & pay for 2 day air upgrade on any unit. We are working hard to get your product ( built if needed), processed &  shipped. Processing times vary, 2-30  days

Returns/Refunds- If there is truly a manufacturing defect a return tag will be provided. Otherwise customer pays for return shipping. Returned items must be sealed/unopened to qualify for a full refund. Refunds are for the Item cost only. Gear returned with out all its original packaging, & accessories or shows signs of wear, is subject to an additional service fee. This item is now used and it would be unfair to resell to another customer as new. 

What products can not be returned? - Clearance items, Custom Builds, Road Cases, DT12 items, items identified as non-returnable, discontinued items, used or NOS items,  electronic software downloads, demo gear, computers, vacuum tubes, earbuds, harmonicas raw-frame speakers, turntable cartridges, fog fluid

View full details