Answers.Body: <p>I have done an extensive review of both receivers, see it <strong><a href="http://philohome.com/pfrec/pfrec.htm">here</a></strong>.
  This <a href="http://philohome.com/pfrec/pfcurves.htm"><strong>other page</strong></a> shows the performance of various motors connected to both receivers.
  Note that because of a problem in Power Functions M-motor, the new receiver is not suitable for driving several of them on the same output. See this <strong><a href="http://www.technicbricks.com/2012/11/lego-power-functions-incompatibilities.html">LEGO official notice</a></strong>.</p>
  
Answers.ContentLicense: CC BY-SA 3.0
Answers.CreationDate: 2013-12-31T09:02:33.800Z
Answers.Text: Could you summarise the content of the links in this answer, and provide the links for further references ? That'd make a better answer
Answers.UserDisplayName: Stephane Delcroix
Answers.ContentLicense: CC BY-SA 3.0
Answers.CreationDate: 2012-12-29T06:47:01.180Z
Answers.LastActivityDate: 2012-12-29T06:47:01.180Z
Answers.UserDisplayName: Philo
Body: <p>Reading a <a href="http://www.technicbricks.com/2012/07/tbs-techreview-15-9398-4x4-crawler.html" rel="nofollow">review</a> of the 4x4 it seems the IR receiver is different from what is included with the trains. From the review all the information we got was "improved CMOS motor driver with lower power loss". Can someone expand on that?</p>
  
Tags: <power-functions>
Title: What is new about the IR receiver in the 4x4 Crawler 9398?
UserDisplayName: tooshel
ThreadText: # What is new about the IR receiver in the 4x4 Crawler 9398?
  
  (Asked by: username_0 on 2012-12-29)
  
  Reading a [review](http://www.technicbricks.com/2012/07/tbs-techreview-15-9398-4x4-crawler.html) of the 4x4 it seems the IR receiver is different from what is included with the trains. From the review all the information we got was "improved CMOS motor driver with lower power loss". Can someone expand on that?
  
  **Tags:** power-functions
  
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  ## 1 answers
  
  ### Answer by username_1 on 2012-12-29. Score: 6
  
  I have done an extensive review of both receivers, see it **[here](http://philohome.com/pfrec/pfrec.htm)**.
  This [**other page**](http://philohome.com/pfrec/pfcurves.htm) shows the performance of various motors connected to both receivers.
  Note that because of a problem in Power Functions M-motor, the new receiver is not suitable for driving several of them on the same output. See this **[LEGO official notice](http://www.technicbricks.com/2012/11/lego-power-functions-incompatibilities.html)**.
  
  > **Comments:**
  > **username_2**: Could you summarise the content of the links in this answer, and provide the links for further references ? That'd make a better answer  
  
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