TAP System Modules and Parts


Below is a listing of all availiable TAP System Modules and parts. For an overview of the TAP system choices please click HERE to jump to the TAP System Overview page.

Although they are intended for OEM and DIY use these modules are not 'kits' or 'bags full of parts'. The all come completely assembled and fully tested as a system prior to shipment. Great care and attention has gone into choosing the highest quality parts and signal path length. Other than the choice between Slagleformers (best) and Hybrid Resistor Modules (next best) as an attenuator there are no sonic tradeoffs from one choice of module to another. The needs of the application and enclosure design will determine the best modules to choose.

Every TAP system has a front panel PCB, an Attenuator PCB, and optionally a source select PCB. Beyond those there are a few options of power supply boards to get the regulated power on to the ribbon cables, etc. These boards simply plug together on a supplied ribbon cable (the 'Bent Bus'). Each of these board options are described below.

Front Panel PCB Options

The Front panel of the TAP system is the user interface. It is this panel that receives remote (or push button) commands and sends these commands on to the attenuator and source select pcb(s).

Full Width TAP Front Panel PCB

This PCB has dual volume displays and individual leds for source select indication. A high quality optical encoder is used for level control. Push button control of display on/off, tape, mute, source up, and source down are also included. It's the board that mates to the AVC-1 Slagleformer Enclosure and is also a good choice for a custom made OEM Chassis.

  • TAP Front Panel PCB Price....................................$225


This small 1-3/4"W x 1-1/4"H PCB controls all TAP functions via remote and has small buttons for volume up/down on the front of the PCB. This is the PCB used inside the PRM-1 Module below. A small included cable plugs into the mating Hardwired Power PCB. This PCB may be ordered with or without the PRM-1enclosure.

  • Naked PRM-1 PCB Price....................................$150

PRM-1 Module

The above photo shows the PRM-1 PCB packaged in a machined aluminium enclosure. This enclosure can be mounted in place of any existing volume pot / knob in the same 0.375" mounting hole. Available in both black and silver.

  • PRM-1 Module Price....................................$195

Attenuator Options

The Attenuator is the volume control for the system. All Attenuator modules feature extremely high quality parts and super short and clean signal paths.

Slagleformer Module

This is our premium attenuator option. At the heart of the module is the amazing top of the range autoformer made by Dave Slagle of www.intactaudio.com. 100% passive and sonically transparent - the entire signal path includes only pure magnet wire and high quality switching elements made by Pickering in England. Full remote control of volume up and down and also right/left balance and mute function.

This is the same unit that was used in our TAP-X pre-amp when it was available and it has all the same features and specs. Notable is the small 1db step size - unheard of for an autoformer or transformer volume control. Also new to this type of device is the ultra clean signal path - no more TVC rats nest of wiring and an easy 3 wire audio connection. Volume range is -54db on up to +7db. Two modules are required for stereo operation or 4 modules for true balanced operation.

  • Slagleformer Module Price.................................$450 each

Hybrid Resistor Attenuator Module

A great option for OEM/DIY active pre-amp systems. It features 1db steps from -60db up to unity gain. The circuit is a modified shunt type - with the clean signal path of a shunt type attenuator but an input impedance that stays much more constant than a traditional shunt type attenuator over the level control range. Two modules are required for stereo operation or 2 true balanced modules for fully balanced operation.

  • 10K or 50K Hybrid Resistor Attenuator Module Price....................$175 each

  • 10K or 50K Hybrid True Balanced Resistor Attenuator Module Price.......$350 each

Hardwired TVC PCB

If you are wanting to use the TAP System and already have a TVC on hand or if you have a favourite TVC supplier this PCB is the choice. You can hardwire up to 31 taps and it also has on board input switching for up to 6 inputs and a Mute and Misc relay. Two TVC PCBs are used for a typical stereo installation - one for the right side and one for the left.

  • Hardwired TVC Module Price.................................$250 each

Input Select PCB Options

To add input selection simply plug one or more of these pcb(s) onto the TAP ribbon cable. All front panel choices will allow input selection to function.

Hardwired RCA Input Select PCB

Hardwire your selection of RCA jacks to the PCB and you are ready to go. Six inputs plus Mute and a Misc function relay. Both Right and Left channels on one handy sized pcb.

  • Hardwired RCA Input Select PCB.................................$105

RCA Input Select PCB with Jacks

RCA Jacks are pre-installed and ready to attach to the AVC-1 Enclosure or to your custom machined back panel. Six inputs plus Mute and a Tape function relay. Both Right and Left channels on a single pcb.

  • Fully populated Input Select PCB with RCA jacks installed...................$275

Hardwired XLR Input Select PCB - Note: No Longer In Production

This is the source select PCB option that should handle any combination of pre-amp inputs. Features Include:

  • Full input switching for both the right and left channels
  • 12 Dual pole input select relays (6 Left + 6 Right)
  • An optional set of 12 more dual pole relays allow for phase switching with NO extra parts introduced into the signal path
  • You can mix in RCA connections if your circuit is happy with that
  • 2 Mute Relays and 2 Misc Function relays - each dual pole relays as well
  • Hardwired XLR Input Select PCB...............................................$200

  • Hardwired XLR Input Select PCB with optional phase invert relays installed...$240

XLR Input Select PCB with jacks

Jacks installed and ready to attach to your custom machined back panel. 6 inputs plus a switched TAPE output and dual XLR outputs. Mute function relay at the XLR outputs. One PCB per channel is required.

  • XLR Input Select PCB with jacks.................................$150 ($300 per pair)

Power PCB Options

These small PCB's accept DC power (9 Vdc typically) and then regulate that down to the 5Vdc needed by the TAP modules. Each has a ribbon cable header to get this power onto the Bent Buss ribbon cable connecting the TAP System Modules together.

Internal Power PCB

This PCB accepts power from on board terminals and has a jumper for display normal/dark mode and also terminals for an HT bypass (volume lock) button. It is used whenever the DC supply is generated inside the chassis with a user supplied internal power supply, or when the specific cutout of the Back Panel Power PCB does not suit the enclosure plans. This is the power supply option to use with the PRM-1 Module - as it has the small header that the PRM-1 cable plugs into. Shown above with and without a PRM-1 mounting plate attached and below with the PRM-1 Module.

  • Internal Power PCB.................................$35

Example of PRM-1 Module with Internal Power PCB. The Internal Power PCB attaches inside the front panel directly to the PRM-1 mounting shaft.

Back Panel Power PCB

As used in the AVC-1 Slagleformer Enclosure this PCB is designed to accept power from an external DC supply via a back panel input jack. A display toggle and an HT bypass push button are included. It's a bit tricky to make the required back panel cutout by hand, but for OEM use in pure passive designs it can be the best option to use.

  • Back Panel Power PCB.................................$35

Bent Metal Remote Handset

Finally you'll want a handset to enable full remote control of all the TAP System functions. Currently the choice is simple - the 13 button Bent Metal Handset is the only handset option for these systems. I had planned on finding a more reasonable option but everyone likes this handset so much that I have yet to get around to it. Each handset is assembled here in my shop using all custom parts - from the all metal extrusion to the custom machined button tops to the pcb inside.

Handset functions include:

  • Volume Up and Down
  • Balance Right and Left
  • Mute
  • Direct Input Selection (1-6)
  • Display On/Off (for dark mode listening)
  • Misc relay funtion (for tape or phase typically)

Bent Metal 13 button Remote Handset Price..............................$120

OEM / DIY TAP Modules Manual Download


All Prices are in US funds. We accept Paypal, Wire transfer, money orders, or personal cheques (must clear before shipment).


Prices do not include shipping. We ship via ExpressPost (trackable and insured). TAP Parts kit shipping to USA destinations typically costs about $30 to $50. The Components are all carefully wrapped and boxed to make sure they arrive safely. Please call for shipping rates to other destinations.

Please e-mail or call with any TAP system configuration questions. I'm happy to work with customers to be certain they end up with the very best solution to fit each project.

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