Instruction: Answer the given question using the supporting document.

Input:
Question: Will a magnetic mount car antenna connect right to this radio without any special adapters?
Document: ?I have one of these in the truck, which only cost me the addition of a $25 mag-mount antenna/cable... total deal! I have another one in the house as my base station, which cost me an additional  $100 power adapter, $40 worth of cabling, $120 worth of antenna, and $70 worth of antenna tripod base and three-section mast (Ouch!).
You can use any speaker you want and it's a lot better than paying $80 for a ham radio speaker. This works best in your home, but I've also had success hooking that same jack into my car stereo using a tape adapter with a mono to stereo converter jack (found at Radio Shack).
That wasn't very well documented in the manual. Before I figured this out, I had set CT in memory and the radio would squelch out everything (like it was supposed to) so I would switch from memory to VFO on the same frequency so I could hear the audio without the tone on VFO, and then back to memory so I could transmit the with the tone. It made life a lot easier when I figured that out.
I have purchased two of them so far, one for the car and one for home.Kenwood has always been known for good audio quality (for ham radio equipment at least) and I usually hear that I sound good with full quieting even at ~20-30 miles with low power (25 watts). It's also very sensitive when it comes to picking up distant stations.
This is a little unusual as you would often see a 5 or 10 watt setting. For me it has not been an issue. Using other mobile radios I often use the mid power setting 20-25 watts out of common courtesy to keep my signal relatively strong into the repeater without having to go full power. The only time that I frequently try to use 5-10 watts is from a base radio when I have a good stable (non-moving) signal into my local repeater.
I couldn't believe it. The guy was amazing. He walked me through it and I found it amazingly simple. Now the little TM-281A is working like a charm! I am so happy! Five stars for Kenwood customer service! I wished that I had had an Elmer to help me get started but I didn't and without Kenwood's help I may have just quit altogether. Very grateful and happy.
With that setup I'm able to pick up and transmit to a repeater about 50 miles away. It's a bit scratchy with the RX audio and I don't know how much power it's running, but it's still not too bad. The front facing speaker is good, but I had a speaker that I wasn't using that I plugged into the back speaker port that makes it sound better.It's very easy to program and I didn't need any special software to program it.
I would and have recommend this radio.
I've seen as low as $137 (normal appears to be $149) and free shipping. Also check Ham City and Ham Radio Outlet, between those three you'll find the best price.
It's a huge improvement over the stock speaker (if you're using it as a base rig) and it's somewhat rugged because it's an indoor/outdoor speaker. I also use it with my Kenwood handheld (TH-K20, also a good radio).
Answer: Yes, the antenna will need a PL-259 connector to connect to the radio.