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Author Topic:   LOWRANCE LMS 522C v. 527C DF
oahe posted 03-08-2008 09:27 PM ET (US)   Profile for oahe   Send Email to oahe  
I am debating which [Lowrance SONAR] to get, the LMS 522C or the LMS 527C DF. I fish in freshwater with depth usually less than 80-feet. I also fish with the downriggers for salmon ocassionally.

I notice the LMS 527C DF is more powerfull with 4,000 [watts] peak to peak. I don't mind spending the $50 extra for the LMS 527C DF and I also think it would be nice to have the dual frequency for downrigger fishing. I'm just concerned that the LMS 527C DF will have too much power for fishing shallower fresh water. Is this something I should be concerned about with this unit; or should I purchase the LMS 522C model?

Any advice from you guys about which unit to purchase and which one will work the best for me.


minitauk85 posted 03-09-2008 05:05 AM ET (US)     Profile for minitauk85  Send Email to minitauk85     
On the advice of a couple of other CW members I fish with, I spent the extra $50 and went with the LMS 527c. So far it's been great, in both shallow and deep water. You can never have too much power!--k
jimh posted 03-09-2008 09:41 AM ET (US)     Profile for jimh  Send Email to jimh     
With LOWRANCE the dual frequency transducer is quite a bit larger than the 200-kHz "Skimmer" transducer. This may be a consideration. I have read some reports that with the larger transducer there is more spray and roostertail thrown up.
Jefecinco posted 03-09-2008 10:00 AM ET (US)     Profile for Jefecinco  Send Email to Jefecinco     
A couple of years ago I switched from a single freq 200 Skimmer xducer to a dual freq 200/50 Skimmer. Neither caused significant spray or rooster tail. Mounting per the instructions and the detail provided in the reference article produced excellent results for me. Luck, perhaps, but nonetheless...


oahe posted 03-09-2008 01:29 PM ET (US)     Profile for oahe  Send Email to oahe     
The product desription for the Lowrance 527 DF states that it was designed for fishing in saltwater. Should this have much bearing on it's performance in freshwater? I guess, I am wondering if having the added power will actually have a negative affect on senstivity in a shallow freshwater application? Will I be shooting myself in the foot - so to speak or is this something to not even worry about? I notice that the cone degree is a little less than the Lowrance lms 522. Will that be the only difference to worry about? How big of a deal is that anyway? I just want to make sure that I purchase the right unit for my needs. It seems appetizing that it has the dual frequency for my downrigger fishing.

Thanks for your comments, Josh

Nauti Tauk posted 03-09-2008 04:05 PM ET (US)     Profile for Nauti Tauk  Send Email to Nauti Tauk     
You're worring about nothing. Jump up for the won't regret it. Works fine in shallow or deep water.
oahe posted 03-09-2008 04:16 PM ET (US)     Profile for oahe  Send Email to oahe     
Cone angle for the 522c is 20 degree and the 527c has a 12 degree angle. Is that something to consider in shallow water? It seems like a big difference. What do you think?
Taylor posted 03-12-2008 08:04 PM ET (US)     Profile for Taylor  Send Email to Taylor     
I have a dual frequency Lowrance, two of them in fact, and I've never found that the [50-kHz] did much for me that I was not already getting with [200-kHz].
davej14 posted 03-15-2008 09:44 AM ET (US)     Profile for davej14  Send Email to davej14     
I had the same concerns before purchasing a single frequency Lowrance LM332c. I ended up with the single frequency sonar on the recommendation of Lowrance because I have only fresh water use. I also liked the larger cone angle of the single frequency transducer and disliked the size of the dual frequency transducer (you should take a look at the transducer size). In deep freshwater lakes it tracks the bottom to several hundred feet.
jmorgan40 posted 03-15-2008 12:58 PM ET (US)     Profile for jmorgan40  Send Email to jmorgan40     
I would definitly go with the 527 with the extra power. It makes a tremendous difference marking fish. As for duel frequency, there is no need unless you will be fishing in 200-300 feet or more. I only switch to 50 khz when I am in over 250 ft of water which is pretty far offshore.

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