New speakers-Polk DB-521 up front, Polk DB-501 in back


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JohnUSA
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New speakers-Polk DB-521 up front, Polk DB-501 in back

Post by JohnUSA » Sun Oct 07, 2018 12:54 am



Saturday's project, almost done. Gotta reinstall the dash tomorrow.
Enlarged the front speaker cutout by about another 1/4". Had to really trim the top and bottom edges of the 521's, and trim all four sides of the 510's to make them fit in back.





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bluthundr31
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Re: New speakers-Polk DB-521 up front, Polk DB-501 in back

Post by bluthundr31 » Sun Oct 07, 2018 4:29 pm

That "install" looks good John.

What did you do regarding a "blank" panel for the stereo, , , ,or did you keep the original one?

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NOVAwing
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Re: New speakers-Polk DB-521 up front, Polk DB-501 in back

Post by NOVAwing » Sun Oct 07, 2018 7:15 pm

JohnUSA wrote:
Sun Oct 07, 2018 12:54 am
Saturday's project, almost done. Gotta reinstall the dash tomorrow.
Enlarged the front speaker cutout by about another 1/4". Had to really trim the top and bottom edges of the 521's, and trim all four sides of the 510's to make them fit in back.


Your speakers look good and sound good to.

Nice work!

VERY disappointed in the j&m speakers I bought and installed with foam speaker buckets up front. Very muffled and almost no clear highs..

They charge alot but they are just cheap low quality speakers lol.

Wish I had done what you did, but I dont like cutting up almost irreplaceable plastic on the bike. I need to get over that.
NOVAwing
1993 GL1500 Aspencade, restored from 4 years rotting outside.

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JohnUSA
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Re: New speakers-Polk DB-521 up front, Polk DB-501 in back

Post by JohnUSA » Sun Oct 07, 2018 8:01 pm

bluthunder--I kept the original radio/cassette player for the time being. Bluetooth and amp in future plans.

NOVAwing--Yeah...here is video of the piece I cut out. I figured if it all went wrong, I'd use ABS glue and put the piece back in.. :lol:





And, here are a few more videos:

Here is how far out the tweeter sticks out. When the grill is back on, there is about a 3/16" clearance due to the outward curve of the speaker grill:




Here is the back side of the dash, and how much it had to be hacked up to fit the new speaker:




Miscellaneous, fine tuning for the speed nuts..1 of 2:




2 of 2:




I had to cut off the top and bottom edges of the speaker frame off. The outer edge of the speaker is rubber, and is glued to the frame. So, by cutting off the top and bottom edges, I cut away part of the outer edge of the speaker. So, the thought was to use liquid rubber to ensure the rubber edge does not come away from the frame. Also, cover up the cut edge, help keep it from rusting.



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Bluewaterhooker0
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Re: New speakers-Polk DB-521 up front, Polk DB-501 in back

Post by Bluewaterhooker0 » Sun Oct 07, 2018 9:26 pm

Seeing the surgical procedure you had to perform, it makes me that much happier that I managed to find, and buy a spare set of DB-501's for my front end. I already have them in the front and have been very happy, but was concerned I may need to replace them in the future, with no replacements available. So, I bought them now, while the getting was good.
I see there are still 10 pairs for sale on Amazon, if anyone is looking. They've been out of production for a while. They are $63, but require virtually no bike surgery for installation, and sound great, or as good as you'll get from the enclosure provided by Honda.
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Happytrails
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Re: New speakers-Polk DB-521 up front, Polk DB-501 in back

Post by Happytrails » Sun Oct 07, 2018 10:45 pm

Speakers sound nice.
Last edited by Happytrails on Sun Oct 07, 2018 11:22 pm, edited 2 times in total.
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JohnUSA
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Re: New speakers-Polk DB-521 up front, Polk DB-501 in back

Post by JohnUSA » Sun Oct 07, 2018 10:47 pm

Yeah, I had those up front originally. And, I just noticed I've been calling them 510's...ooops...

Yes, the 501's go in smooth as butter. I wanted something a little "punchier".

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Bluewaterhooker0
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Re: New speakers-Polk DB-521 up front, Polk DB-501 in back

Post by Bluewaterhooker0 » Sun Oct 07, 2018 11:33 pm

Was there a noticeable improvement over the 501s ? We're only talking 1/4-1/2" size increase. I've found the enclosure, or lack of it, to be the major determining factor on audio quality in the front and rear.

JohnUSA
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Re: New speakers-Polk DB-521 up front, Polk DB-501 in back

Post by JohnUSA » Mon Oct 08, 2018 1:04 am

Yeah, there is a difference. I get more sound with the volume turned up less, if that makes sense.

curlew52
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Re: New speakers-Polk DB-521 up front, Polk DB-501 in back

Post by curlew52 » Thu Nov 01, 2018 6:09 am

Ok, I got a little lost in the translation on the Polk speaker thread! Is the recommended speaker for fronts Polk DB-501? Original posting said Polk DB-521 for front, DB-501 rear! Sounded like the 501’s mount on the front as well! Want to make sure before purchasing! Thanks

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DenverWinger
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Re: New speakers-Polk DB-521 up front, Polk DB-501 in back

Post by DenverWinger » Thu Nov 01, 2018 6:51 am

DB-401's fit the front perfectly but are getting hard to find. So this thread is about using DB-521 as a substitute.
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curlew52
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Re: New speakers-Polk DB-521 up front, Polk DB-501 in back

Post by curlew52 » Thu Nov 01, 2018 6:57 am

Ok thanks! Got it! Just so happens that one of my fronts has been out so this advice has been timely! Thanks!

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Re: New speakers-Polk DB-521 up front, Polk DB-501 in back

Post by JohnUSA » Thu Nov 01, 2018 8:06 am

curlew52 wrote:
Thu Nov 01, 2018 6:57 am
Ok thanks! Got it! Just so happens that one of my fronts has been out so this advice has been timely! Thanks!
The 501's are a 99.8% plug and play up front. I actually had the 501's mounted up front to start with, and then decided to murder the plastics and wedge in the 521's.

You have to cut out the outer edge of the screw holes. Change them from a round hole to a "u"...
http://goldwing.eurekaboy.com/stereoupgrade10.jpg

Diagonal cutters, wire cutters, or snips are your friend on this one...leave the dremel in tool box. It's a light metal, cuts out very easy.

You'll also need eight washers. #4's, if memory serves correctly. I took the mounting bolt down to my hardware store that sells bulk, and picked eight out of the bin.

Tip for removing dash: This caused a big slow down for me. Meaning, these clips on the vents hold the dashboard to the frame, and have to be depressed to allow the dash to come free.
https://www.goldwingfacts.com/forums/ga ... 000001.jpg

From the backside, those vents are covered by a vent plenum. I was able to move it just a bit to get the tip of a long screwdriver under the clip to help release it's grip on the dash frame.

After reviving some Navy language from a distant past, I discovered that taking out the turn signals gave me a pretty good access to facilitate the removal of the vents. YMMV.

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Re: New speakers-Polk DB-521 up front, Polk DB-501 in back

Post by WingAdmin » Thu Nov 01, 2018 9:40 am

JohnUSA wrote:
Thu Nov 01, 2018 8:06 am
curlew52 wrote:
Thu Nov 01, 2018 6:57 am
Ok thanks! Got it! Just so happens that one of my fronts has been out so this advice has been timely! Thanks!
The 501's are a 99.8% plug and play up front. I actually had the 501's mounted up front to start with, and then decided to murder the plastics and wedge in the 521's.

You have to cut out the outer edge of the screw holes. Change them from a round hole to a "u"...
http://goldwing.eurekaboy.com/stereoupgrade10.jpg

Diagonal cutters, wire cutters, or snips are your friend on this one...leave the dremel in tool box. It's a light metal, cuts out very easy.

You'll also need eight washers. #4's, if memory serves correctly. I took the mounting bolt down to my hardware store that sells bulk, and picked eight out of the bin.

Tip for removing dash: This caused a big slow down for me. Meaning, these clips on the vents hold the dashboard to the frame, and have to be depressed to allow the dash to come free.
https://www.goldwingfacts.com/forums/ga ... 000001.jpg

From the backside, those vents are covered by a vent plenum. I was able to move it just a bit to get the tip of a long screwdriver under the clip to help release it's grip on the dash frame.

After reviving some Navy language from a distant past, I discovered that taking out the turn signals gave me a pretty good access to facilitate the removal of the vents. YMMV.
I could have saved you some frustration and foul language - the entire dash disassembly procedure is shown (with pictures) as part of this how-to, and it includes the things you figured out through trial and error: viewtopic.php?f=14&t=10998



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