Can you recommend a wattage for an all purpose soldering iron? - AVS Forum | Home Theater Discussions And Reviews
Baselworld is only a few weeks away. Getting the latest news is easy, Click Here for info on how to join the newsletter list. Follow our team for updates featuring event coverage, new product unveilings, watch industry news & more!

Forum Jump: 
Thread Tools
post #1 of 12 Old 12-20-2012, 09:32 AM - Thread Starter
Senior Member
Dr. Crash's Avatar
Join Date: Oct 2009
Posts: 237
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 12 Post(s)
Liked: 12

My son and I are going to assemble our Overnight Sensations' crossovers. I have an old soldering iron that runs on 220 V and requires my converter... so I was thinking of using a 110 V iron. Radio Shack has 30 W, 40 W, 60 W all around $10 (the 30 W also comes with a bit of solder, a tool, and scissors), as well as dual voltages (e.g. 20/40 W). I picked up the 30 W kit. Will that be good all around for those crossovers as well as, potentially, beefier ones (I may build an entire 7.1 set if this goes well!) or should I increase the wattage?

Also, is very old solder still okay? I don't see why not but I am ignorant in those matters.
Dr. Crash is offline  
Sponsored Links
post #2 of 12 Old 12-20-2012, 09:43 AM
AVS Special Member
Sibuna's Avatar
Join Date: Apr 2010
Location: Western NY
Posts: 2,402
Mentioned: 31 Post(s)
Tagged: 0 Thread(s)
Quoted: 359 Post(s)
Liked: 404
i cant really answer your question. but this is what i use. its a 25w iron. seems to work fine
Sibuna is offline  
post #3 of 12 Old 12-20-2012, 09:51 AM
AVS Addicted Member
Bill Fitzmaurice's Avatar
Join Date: Nov 2009
Location: New Hampshire
Posts: 11,963
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Liked: 2669
I use a 75w gun. Lower wattages take longer to heat the joint, and that can cause component damage. A higher wattage gun doesn't heat the joint any hotter, it just does it faster, minimizing long term heat build up within the component.

Bill Fitzmaurice Loudspeaker Design

The Laws of Physics aren't swayed by opinion.
Bill Fitzmaurice is online now  
post #4 of 12 Old 12-20-2012, 09:55 AM
Senior Member
pnw's Avatar
Join Date: Dec 2003
Posts: 456
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 15 Post(s)
Liked: 41
Personally, I like higher wattage irons. Quality joints can be made more quickly without "soaking" component leads. Longer application lets heat creep further up the leads, melting plastic etc.

Edit: Bill beat me to it....

pnw is online now  
post #5 of 12 Old 12-20-2012, 04:38 PM
Advanced Member
MBentz's Avatar
Join Date: Jun 2006
Location: Chicago
Posts: 952
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 24 Post(s)
Liked: 42
If you're going to use a Ratshack iron, then get the highest wattage and use that tip tinner/cleaner compound stuff:

The tips on those irons wear out extremely fast, but the tinner will help scrape off the corrosion that builds up and tins the tip well enough to do soldering work.

-Mike Bentz
~It's all about compromise~
MBentz is offline  
post #6 of 12 Old 12-21-2012, 05:44 PM
Senior Member
Gaugster's Avatar
Join Date: Feb 2005
Location: Chicago, IL
Posts: 424
Mentioned: 4 Post(s)
Tagged: 0 Thread(s)
Quoted: 61 Post(s)
Liked: 52
Have you ever considered a wireless solder iron?

Heat output is adjustable based on flame setting. I use this one but probably picked it up at Radio Shack many years ago. Never looked back. I have a can of butane around and just add some when I start a new project.

Gaugster is offline  
post #7 of 12 Old 12-21-2012, 08:18 PM
AVS Special Member
Looneybomber's Avatar
Join Date: Sep 2006
Location: Lawrence, KS
Posts: 4,666
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 2 Post(s)
Liked: 23
I've used 30w pens and 100/150w guns. The big gun is great if you have to solder multiple 12ga wires coming together on components. For <16ga and crossover components, the 30w treats me fine. Alligator clips or other small metal clips can help wick heat away from leads prior to reaching the component.

Looneybomber is offline  
post #8 of 12 Old 12-22-2012, 01:29 AM
Advanced Member
Thatsnasty's Avatar
Join Date: Nov 2008
Location: Niagara Falls, Ontario
Posts: 551
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 43 Post(s)
Liked: 37
I bought and used this one on the 4Pi's crossover. It did the trick and got surprisingly hot for a cheap iron.

Then bought these tips and switched to the flat "half-circle" type end. It works much better at transferring heat then a regular pen type end. (more surface area)


For those unfamiliar with Deal Extreme. It's a cheap website from Hong Kong that sells supplies and random things for literally everything you can think of. Shipping is free anywhere in the world, for everything on the website.
Be warned shipping may take a 2-8 weeks if do use the free shipping (expedited is also available), and some of the stuff is notoriously crappy.
It's great for picking up those nick-nacks you aren't in a rush to get, especially for us DIY guys.

But to answer your question OP, 30w would be fine, and like Sibuna posted, the 25w Weller iron will work good as well, seeing as they are a great brand.
I wouldn't dip below 30w though, no point in using a weaker iron for crossovers, they aren't very complicated to solder.
Thatsnasty is offline  
post #9 of 12 Old 01-25-2013, 05:42 PM
sylc's Avatar
Join Date: Dec 2012
Posts: 6
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 10
If you want clean reliable solder joints you need to get a quality iron at some point. If it is just for one project than the radio shack iron will probably work, but if you find your self using it more than once you will want a good iron that provides stable high heat for quality joints.

I have used quite a few irons over the years and this is by far my favorite for the price, if you want a recommendation.\
sylc is offline  
post #10 of 12 Old 01-25-2013, 06:12 PM
Advanced Member
cookieattk's Avatar
Join Date: Jun 2011
Posts: 663
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 96 Post(s)
Liked: 73
hakkos work thats what i use for every thing for years.
cookieattk is offline  
post #11 of 12 Old 01-26-2013, 08:17 AM
Advanced Member
vitaminbass's Avatar
Join Date: Jan 2011
Posts: 570
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 11
I have the Radio Shack one with digital, adjustable temp and readout, I think it was the best one they had at the time I bought it. I was hesistant/skeptical as the quality of RS stuff can be dubious but it has acutally been a rreally good unit. And it's easy to adjust to just the right temp, such as if you are using lead free solder and need a bit hotter. Also the tiip senses the temp and gives it more juice when needed.

Note: I was curious to see if they still offered this and they offer two different ones now fitting the description, mine is the black one.
vitaminbass is offline  
post #12 of 12 Old 01-26-2013, 08:50 AM
AVS Special Member
Mr.Tim's Avatar
Join Date: Jul 2004
Location: SC
Posts: 2,662
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 199 Post(s)
Liked: 147
Circuit Specialists sells decent irons at reasonable prices. They're pretty well known in DIY circles; you can google to find out more.

They're a good compromise between a cheap iron and a Hakko.

Mr.Tim is offline  
Sponsored Links
Reply DIY Speakers and Subs

Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page

Forum Jump: 

Posting Rules  
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off