Plex Knock Monitor V2




PLEX KNOCK MONITOR V2 The quintessential tool for tuners, available now with single or optional dual knock inputs.  Tune like a pro and never miss knock again. The Plex Knock Monitor V2 delivers...
Single or Dual Option


The quintessential tool for tuners, available now with single or optional dual knock inputs. 

Tune like a pro and never miss knock again.

The Plex Knock Monitor V2 delivers reliable audio and visual knock detection even for the most challenging projects. Available in single and dual input versions (up to 8 cylinders) it comes bundles with an advance PC analysis and configuration SW> Built with a rugged aluminum enclosure for rigorous use. 

Features: Best-in-class Audio Quality.  Improved SNR (signal-to-noise ratio) by 20dB, with much higher audio clarity and 10 times lower noise.
Transflective Display 2.3'' transflective LCD display offers better viewing in daylight and outdoor conditions thus enabling knock detection on the device without a PC being always necessary.
Dual Knock Sensors Inputs Optional dual-knock sensor input with increased dynamic range, suitable for twin bank engines or for enhanced knock detection. Choose whether to split the audio channels per sensor or listen to them combined. 0-5V Analog Load Sensor Input Connect a MAP or TPS sensor and perform 3-dimensional knock data on the device or PC.
Non-volatile Device Logging Memory Capture 3-dimensional knock information and log knock count with knock level per cylinder versus RPM and load.
Dual Audio Output Sockets Benefit from the two audio output sockets by using them either for training your apprentices or for cross-checking the knock signal with colleagues.
Higher-Performance Processor New higher performance main processor improves the calculating speed making the monitor faster and smother in operation/ Dual Power Options!  
Now you can power up your knock monitor not only externally but also via its USB port. Detect knock with higher convenience irrespective of where you are.
Isolated USB Port  USB port isolation provides electrical protection, more robust device communications and added noise immunity.
Isolated Trigger Input.  Optically isolated trigger input protects the device from ignition signal noise & related electrical damage.

Optional CAN BUS Port - send knock level, knock count, knock threshold and per-cylinder knock data to your dyno, ECU or other external logger. 
Per Cylinder Detection - The ignition tripper input allows you to detect knock per cylinder for up to 8 cylinders.
Advanced Audio Filtering - Steep 30 dB band and high pass filters that isolate knock from background noise for every engine type.
Frequency vs Bore Size Cal. - A built-in engine bore size reference lets you select the knock frequency by simply choosing the cylinder size. 
Bright LED Warning - Configurable 2-level knock intensity alarm will get your attention in the dyno room even without having the headset on.
Threshold vs RPM - Accurately detect knock throughout the engine RPM range. View on device or laptop. 

Is compatible with the following Dynamometer companies:
Mustang Dynomometer
Mainline DynoLog
Dyno Dynamics


A new version of the Knock Monitor V2 software is available and can be 
downloaded from the following link:   HERE

The software includes a new firmware version v0.72.

The changes vs the previous v0.70 version are:
Software v0.72
     NEW: Realtime data are saved and can be exported in CSV format
     NEW: Option for ignoring realtime data when rpm is dropping
     NEW: Firmware files included with the application
     NEW: The application checks for and installs updates automatically
     IMPROVED: USB communications and status indication
     IMPROVED: Auto change between rpm and time rolling X axis depending on preset mode
     FIXED: Realtime could not be used after reading the device configuration
     FIXED: CAN BUS Tx ID was not saved correctly
Firmware v0.72
     FIXED: The selected preset was not saved when changed from the PC Software

This new version of the software also has an automatic update capability so after it is launched it will check for updates online. If an update is found it will be downloaded and installed on the next software start.

**Shipping policy** Paid orders received by 10am EDT will be processed for shipment the same day. Orders received after 10am EDT will be processed for shipment the next business day. Weekends and holidays will be processed next business day.


International orders are subject to your country's import fees.

Our return policy extends for 30 days past the date of purchase.  

To be eligible for a return, your item must be in the original packaging.

Several types of goods are exempt from being returned:

* Downloadable software products

* HP Tuner Credit purchases

* Online courses

*Live/private hands-on seminars 


To complete your return, we require a receipt or proof of purchase.


Refunds (if applicable)

Once your return is received and inspected, we will send you an email to notify you that we have received your returned item. We will also notify you of the approval or rejection of your refund.

If you are approved, then your refund will be processed, and a credit will automatically be applied to your credit card or original method of payment, within a certain amount of days.

Once The Tuning School receives the item(s) back, a refund is submitted. It could take approximately 3-5 business days. Although we submit the refund immediately, the customer's bank must still process the refund and apply it to the account. Processing time varies between banks.  



Sale items (if applicable)

Only regular priced items may be refunded, unfortunately sale items cannot be refunded.


Price Protection

The Tuning School offers price protection for full retail priced items only. 
If an item price has dropped within 7 days after purchase, the price difference can be refunded. 
This is not valid with other promotional discounted/sales, hands-on classes, clearance, or specially-priced bundles. Not valid for Black Friday/Cyber Monday discounts.


Exchanges (if applicable)

We only replace items if they are defective or damaged.  If you need to exchange it for the same item, send us an email at admin@thetuningschool.com or call 727-264-8875 for return authorization. Then send your item to: 2328 Destiny Way Suite A, Odessa, FL, 33556, United States.


Returns Shipping

To return your product, you should mail your product to: 2328 Destiny Way Suite A, Odessa, FL, 33556, United States.

You will be responsible for paying for your own shipping costs for returning your item. Shipping costs are non-refundable. If you receive a refund, the cost of return shipping will be deducted from your refund.

Depending on where you live, the time it may take for your exchanged product to reach you, may vary.



PLEASE SEE OUR COVID-19 RESPONSE AT THE TOP BANNER. All products shipped from The Tuning School are shipped between the hours 10:00am – 10:30pm EST Monday-Friday (excluding holidays).
Products purchased are shipped same day before 10:00am EST otherwise shipped next business day.
All orders shipped USPS Priority take an additional 1-3 days.
Next Day Air shipments are only next business day. 
UPS shipments are calculated on business days only (for example, UPS 2 Day Air purchased on Friday morning would be shipped Friday afternoon. Two business days would mean the package arrives on Tuesday).
Call for arrangements for non-business days. 
This information should be used in example; wanting an overnight shipment that is purchased on a Friday at 4:30pm EST. This shipment would not be sent until Monday, which means the customer would not receive it until Tuesday. 
After hand-off to carrier occurs, all responsibility and liability is transferred to shipping carrier. Customers choose their shipping speed at time of purchase. The Tuning School is not responsible for delayed, lost, or damaged shipping due to carrier neglect. 

*If Klarna is chosen as a method of payment, a delivery confirmation signature is required.