I need Monitor 7A schematic, please

danger boy

My friend and I are upgrading the X-over in my Mon 7A's this Saturday.. anyone have the schematic for the 7A they can email me or is there somewhere I can find it online?

I know this is short notice.. but i need it by Saturday. :eek: :eek:

tanks!!

george daniel

did you look under troublshooting, Mark has alot of schematic's posted there.

dorokusai

It's in there. The schematic is enough to get started and as with any Monitor series, you better pull it and get some eyes on it. The schematics for vintage Polk speakers aren't used by NASA.

george daniel

I'm doing a set of 7's with the peerless this w/e,,like Doro said,,open em' up first and get your eyes on the crossovers,,who knows what you'll find,,and it may save you some time,,,good advice,,as always,, have fun

ViperZ

dorokusai wrote: »

It's in there. The schematic is enough to get started and as with any Monitor series, you better pull it and get some eyes on it. The schematics for vintage Polk speakers aren't used by NASA.

Copy that. Haven't seen any Polk speakers around here

danger boy

cool thanks peeps... i have opened em up... they look pretty simple and easy to work on... that's why i'm up for doing the job.

danger boy

ok. i looked up the schematics for the monitor 7's.... and it lists three different PDF's. which would be the correct one for the 7A's w/peerless? and it uses MW6500 drivers.

jakelm

They dont have the scHematics for the 7's with peerless and mw6500's.

Here is a diagram of what my 7's with peerless and 6500's have. I took the original 7's crossover diagram that Polk offers and modified it to what my 7's are.

george daniel

I just started on my 7's,,they have a 2.7 and 4.5 ohm resistors,,12 and 34uF caps,,if that helps.

danger boy

george daniel wrote: »

I just started on my 7's,,they have a 2.7 and 4.5 ohm resistors,,12 and 34uF caps,,if that helps.

is that with peerless tweeters?

george daniel

danger boy wrote: »

is that with peerless tweeters?

yes they are

danger boy

ok. thanks.. i'm looking forward to reviving these 7A's and putting them to use.

jakelm

I appologise, my info I have given you was wrong.

I did take a pic of my 7's with peerless and a description. Post #33

I hope this helps

D is 27uF not 12uf.

http://www.polkaudio.com/forums/showthread.php?t=45852&page=2

dorokusai

Jake - If you get that tidbit photoshopped, send it to me and I'll post it in the Troubleshooting section.

dorokusai@verizon.net

jakelm

I'm not quite understanding you. How do you want it emailed? Photoshopped?

danger boy

one X-over done. one to go... it's a slow process.. but should be back up and running before nightfall.

dorokusai

jakelm wrote: »

I'm not quite understanding you. How do you want it emailed? Photoshopped?

Nevermind, I'll change the value and upload it.

george daniel

danger boy wrote: »

one X-over done. one to go... it's a slow process.. but should be back up and running before nightfall.

Good luck,, just finished the 7b's tonight.:)

danger boy

ok, both croxxovers are done now. and i've been listening to the Monitor 7A's for a couple hours now. OMG!

best $55 i think i've ever spent.

my friend did the work on the x-overs with me supervising , i got them home tonight and right away hooked them up.. very nice sounding, I immediately noticed a big improvement in the clarity in the highs and mids.

I bought what seems to be the standard for x-over upgrades.. Mills/Solen parts. They are much bigger than the old parts of course. I wasn't expecting this much of an improvement in the sq.

The soundstage is wider.
with the clarity i can hear more and better separation of instruments in the music.
i can hear more separation also in background vocals. I hooked it up to the tube DAC and that also helps with the sq and added a bit more bass as well.

Now it looks like I may have to now redo the x-overs in the the Monitor 7B's as well.

It really did bring back new life into the speakers. I had no idea i was missing so much in my music before. Now I realize all that i was missing.

I highly recommend anyone on the fence whether to to it or not. DO IT! well worth the small $ for the big return on sound quality.

thanks to everyone who helped with the schematic for these.

jakelm

dorokusai wrote: »

Nevermind, I'll change the value and upload it.

I see what you wanted me to do. Download the schematics and use Paint to modify for the 7's with peerless.

jakelm

The wierd thing is, that, all the schematics for 7's have just one resistor for the tweeter. While mine is built more like a 10A crossover with 2 resistors.

heiney9

danger boy wrote: »

ok, both croxxovers are done now. and i've been listening to the Monitor 7A's for a couple hours now. OMG!

best $55 i think i've ever spent.

my friend did the work on the x-overs with me supervising , i got them home tonight and right away hooked them up.. very nice sounding, I immediately noticed a big improvement in the clarity in the highs and mids.

I bought what seems to be the standard for x-over upgrades.. Mills/Solen parts. They are much bigger than the old parts of course. I wasn't expecting this much of an improvement in the sq.

The soundstage is wider.
with the clarity i can hear more and better separation of instruments in the music.
i can hear more separation also in background vocals. I hooked it up to the tube DAC and that also helps with the sq and added a bit more bass as well.

Now it looks like I may have to now redo the x-overs in the the Monitor 7B's as well.

It really did bring back new life into the speakers. I had no idea i was missing so much in my music before. Now I realize all that i was missing.

I highly recommend anyone on the fence whether to to it or not. DO IT! well worth the small $ for the big return on sound quality.

thanks to everyone who helped with the schematic for these.

There you go Al, that's just the exact impression I had when doing my 5b's. Really does transform the speakers, doesn't it? There are some on here that just haven't gotten the same results and I don't know why. Different strokes for different folks I guess.

My latest experiment is bypassing the high frequency Solens with a Platinum Sonic cap and see if that makes not only a difference but a difference that I prefer.

H9

danger boy

jakelm wrote: »

The wierd thing is, that, all the schematics for 7's have just one resistor for the tweeter. While mine is built more like a 10A crossover with 2 resistors.

your crossover looks just like my 7A ones.. two caps, two resistors.

danger boy

heiney9 wrote: »

There you go Al, that's just the exact impression I had when doing my 5b's. Really does transform the speakers, doesn't it? There are some on here that just haven't gotten the same results and I don't know why. Different strokes for different folks I guess.

My latest experiment is bypassing the high frequency Solens with a Platinum Sonic cap and see if that makes not only a difference but a difference that I prefer.

H9

H9,
next month when I redo the 7B crossover.. i think i'll go a slightly different route and go with either Auricaps or Kimber Kaps. I read that they should be a little smoother in the top end..

After spending several hours last night listening to some CD's and vinyl, i can hear that if the Solen/Mills combo doesn't smooth out in the top end.. it could be to grainy. and that would be a bad thing.

heiney9

danger boy wrote: »

H9,
next month when I redo the 7B crossover.. i think i'll go a slightly different route and go with either Auricaps or Kimber Kaps. I read that they should be a little smoother in the top end..

After spending several hours last night listening to some CD's and vinyl, i can hear that if the Solen/Mills combo doesn't smooth out in the top end.. it could be to grainy. and that would be a bad thing.

Give them some time for break in, etc. I did the RD0's and the x-over at about the same time and at first I thought the same thing. I'm sure a better cap will improve things a little bit in your next project, but the Solens are surprisingly good. I did mine 6-8 weeks ago they are just now really starting to surprise me.

H9

jakelm

I have replaced all my caps with Solens. Everything sounds great.