7C Beef Up help
Comments
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Forum first right there. Great job.Don't take experimental gene therapies from known eugenicists.
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Forum first right there. Great job.
Thanks—I had some help, natch. Currently giving John Prine at the Other End a listen, and the acoustic-ness of the recording is really showing me I did the right thing. VR3 xover is next…can’t wait. -
On your model, where is the rear terminal cup positioned in relation to the midwoofer?Don't take experimental gene therapies from known eugenicists.
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Not sure I’m tracking. The rear terminal cup that holds the xover is where I’d expect it to be…lower end of the cabinet, about 10” diagonally from the midwoofer
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pic?
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First one is the terminal cup. It’s. 7c speaker so I’d say it’s about just below the halfway point on the speaker.
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If you're not going to eat that piece of pizza on the floor there, I wouldn't mind polishing it off before the dog comes inside.inanortherntown wrote: »First one is the terminal cup. It’s. 7c speaker so I’d say it’s about just below the halfway point on the speaker.
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If you're not going to eat that piece of pizza on the floor there, I wouldn't mind polishing it off before the dog comes inside.inanortherntown wrote: »First one is the terminal cup. It’s. 7c speaker so I’d say it’s about just below the halfway point on the speaker.
Ha. That the corner of my rug runner thing. For when I obsessively pace back and forth before hacking into my speakers.
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I was just curious if a dowel can be placed between the MW and PR extending straight to the back panel?Don't take experimental gene therapies from known eugenicists.
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I was just curious if a dowel can be placed between the MW and PR extending straight to the back panel?
What diameter dowel? I need to pull things to put the xovers in when they arrive so I'd be willing to try? -
3/4 to 7/8" wood dowel should be plenty strong.Don't take experimental gene therapies from known eugenicists.
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Wow ok. So like just a single dowel running between the space between the MW and PR? Tried to take a pic. Have to cut it to size and lightly tap it into place?
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Exactly. You can use Liquid Nails or PowerGrab and let dry overnight. That and hurricane nut fasteners will be your best solution for cleaning up the mid-bass on those.Don't take experimental gene therapies from known eugenicists.
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No dowel needed.Political Correctness'.........defined
"A doctrine fostered by a delusional, illogical minority and rabidly promoted by an unscrupulous mainstream media, which holds forth the proposition that it is entirely possible to pick up a t-u-r-d by the clean end."
President of Club Polk -
Don't take experimental gene therapies from known eugenicists.
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I was just curious if a dowel can be placed between the MW and PR extending straight to the back panel?That and hurricane nut fasteners will be your best solution for cleaning up the mid-bass on those.
Definitely consider this! I've done it on my Monitor 7's and 10's. Cheap and easy mod with very noticeable gains!
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Brian
One-owner Polk Audio RTA 15TL speakers refreshed w/ Sonicap, Vishay/Mills and Cardas components by "pitdogg2," "xschop" billet tweeter plates and BH5 | Stereo REL Acoustics T/5x subwoofers w/ Bassline Blue cables | Rogue Audio Cronus Magnum III integrated tube amp | Technics SL-1210G turntable w/ Ortofon 2M Black LVB 250 MM cart | Sony CDP-508ESD CD player (as a transport) - RIP 1/19/2025 | LampizatOr Baltic 4 tube DAC | Nordost & DH Labs cables/interconnects | APC H15 Power Conditioner | GIK Acoustics room treatments | Degritter RCM -
Yep hurricane nuts forthcoming
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I did learn through my disassembly that my 7's have the same birth day (not year) as my wife, so that's something
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Oh and check out what the fill in one of my speakers looked like. Cigar burn?
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Burnt resistor- Not Tom ::::::: Any system can play Diana Krall. Only the best can play Limp Bizkit.
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I'd really be interested in your crossover if you could check the values and maybe post a picture or two. Also, what MW# (6502?). Late 7B and early 7C both had the SL1000 tweeter and both had recessed passive and not recessed MW. Maybe the only main difference was the MW was changed from MW6500 to MW6502 and crossover values.George / NJ
Polk 7B main speakers, std. mods+ (1979, orig owner)
Martin Logan Dynamo sub w/6ft 14awg Power Cord
Onkyo A-8017 integrated
Logitech Squeezebox Touch Streamer w/EDO applet
iFi nano iDSD DAC
iPurifier3
iDefender w/ iPower PS
Custom Steve Wilson 1m UPOCC Interconnect
iFi Mercury 0.5m OFHC continuous cast copper USB cable
Custom Ribbon Speaker Cables, 5ft long, 4N Copper, 14awg, ultra low inductance
Custom Vibration Isolation Speaker Stands and Sub Platform -
Hi yes the MW are MW6502
Here are the crossovers.
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6502's are better drivers.Don't take experimental gene therapies from known eugenicists.
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There is your dacron burner... that sucker got HOT!!! Looking at the discoloration on the board I'd say it's toast.
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There is your dacron burner... that sucker got HOT!!! Looking at the discoloration on the board I'd say it's toast.
Yep. As luck would have it everythings getting swapped out -
Did you or previous owner have a shorted out tweeter? That resistor still works?
This is close to your schematic only you have the previous one (that we don't have) with the 2.7ohm resistor and fuse instead of polyswitch:
https://us.v-cdn.net/5021930/uploads/attachments/4/6/7/2/8/18772.pdfGeorge / NJ
Polk 7B main speakers, std. mods+ (1979, orig owner)
Martin Logan Dynamo sub w/6ft 14awg Power Cord
Onkyo A-8017 integrated
Logitech Squeezebox Touch Streamer w/EDO applet
iFi nano iDSD DAC
iPurifier3
iDefender w/ iPower PS
Custom Steve Wilson 1m UPOCC Interconnect
iFi Mercury 0.5m OFHC continuous cast copper USB cable
Custom Ribbon Speaker Cables, 5ft long, 4N Copper, 14awg, ultra low inductance
Custom Vibration Isolation Speaker Stands and Sub Platform -
Previous owner did, although he didn't tell me. Both tweeters were warranty repairs it looks like. I saw that when I pull them to replace them.
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Rehab complete. XOvers arrived and they’re beauts, Clark
Hooked up everything
Mounted the xovers
Finally secured the drivers. That was kind of nerve wracking, and two of the hurricane nuts didn’t cooperate, but overall it was a 98% success, thanks entirely to you all.
Already the soundstage is waaaay open and lower range is felt and really just experienced.
Thanks again for all the input. Consider me a fan.
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Oh and special shout out to Treynfor crafting a rainman-level awesome crossover set. Truly almost too pretty to put inside the cabinets.
