post a picture AUDIO RELATED ONLY

PreCd

Here is the inside of my 1986 Adcom GFA-555 amplifier. I have re-built much of it including the filter caps, common bus bar, electrolytic capacitors, etc. I have some Sanyo transistors coming to replace the ones on the input board.

Mr. Sharpe

The 555 is from 1986???

PreCd

That is correct. That is the date they started making these amplifiers. I remember purchasing my SDA2s in 1986 and the salesman trying to sell me the Adcom gear. Now Adcom has started selling a remake of the 555 but not the same animal. I don't know when they stopped making the 555 but my circuit boards are all stamped 1986. The 555 II came out in the early 90s I believe.

Mr. Sharpe wrote: »

The 555 is from 1986???

mhardy6647

Mr. Swauger's Macs have got panache! One of the nice things about the C8s, if memory serves, is a pretty diverse set of playback EQ characteristics for records; great for pre-LP-era collectors (although they, of course, don't need stereo!).

Mr. Sharpe

PreCd wrote: »

That is correct. That is the date they started making these amplifiers. I remember purchasing my SDA2s in 1986 and the salesman trying to sell me the Adcom gear. Now Adcom has started selling a remake of the 555 but not the same animal. I don't know when they stopped making the 555 but my circuit boards are all stamped 1986. The 555 II came out in the early 90s I believe.

Well it being made for so long I'm not surprised it's not the same.

[Deleted User]

Thanks, Mr. H, these belong to Polk #1 along with two Mac amps that are extremely rare. I haven't started on those. The C4 has an interesting arrangement for the power supply. The preamp itself has an AC power cord, but then there's an octal socket that routes the AC to an external box that has a transformer and tube rectifier. Then the DC goes back to the preamp chassis and gets filtered. The filament voltage routes from the external supply to the chassis, gets rectified (one unit has a selenium rectifier and the other one has two diodes) and filtered. The phono has variable cartridge loading as well as the different playback EQs. If you were playing a Columbia record there's one setting, a London has another. Very cool!
I was looking at an ad for an early Victrola that talked about it coming with three different needles. One was for "brighter" sound, one was a "warmer" sound and the third was more "dynamic" and "active".
Sound familiar?

mhardy6647

D'oh - C4s! Sorry!

Mr. Sharpe

here are some pretty pictures I diddied up for this awesome thread:)

and actually the one that says Oppo 95 is what will hopefully be my HT stuff one day... over the rainbow. the Adcom being a 555.

20hz

I have finally got the top built on my sub and will test fit the cabinet and hook it up !

Mr. Sharpe

Crap, those will probably do your user name huh:D Post pics when you're done. I've been wanting to build a new subwoofer for my HT but won't for a while. Hope that goes well!

halo71

My RS-IIIa XO's....

Before:


After:

newrival

Mr. Sharpe wrote: »

Pictured here

The Verity Audio Monsalvat Priced at 325,000

The Alon Grand Exotica at a bargain 125,000:biggrin: I want the alon, but...

Those Verity's are absolutely gorgeous. The sub-bass system is very elegant as well

Face

Kenneth Swauger wrote: »

I was looking at an ad for an early Victrola that talked about it coming with three different needles. One was for "brighter" sound, one was a "warmer" sound and the third was more "dynamic" and "active".
Sound familiar?

I believe it had to do with the thickness of the needle.

Mr. Sharpe

newrival wrote: »

Those Verity's are absolutely gorgeous. The sub-bass system is very elegant as well

no doubt!!!

lanchile

This is my diy amplifier.Attachment not found.Attachment not found.Attachment not found.Attachment not found.

Mr. Sharpe

that's awesome.

20hz

Mr. Sharpe wrote: »

Crap, those will probably do your user name huh:D Post pics when you're done. I've been wanting to build a new subwoofer for my HT but won't for a while. Hope that goes well!

Sure does the big box makes it so I only need need 260 watts per pair to reach xmax.
I guess my cornor loading gives my like 95 db efff (1 meter 1 watt) and on a graph its real flat only down 9db at 20 hertz .

Mr. Sharpe

20hz wrote: »

Sure does the big box makes it so I only need need 260 watts per pair to reach xmax.
I guess my cornor loading gives my like 95 db efff (1 meter 1 watt) and on a graph its real flat only down 9db at 20 hertz .

Sheesh, sounds awesome!

heiney9

FTGV

In progress mid/tweet module for 3way.

steveinaz

My newest audio additionAttachment not found.:

mhardy6647

I would love to hear a pair of Harbeths sometime - everything I've read about them, and the kind of folks I know who own them, suggests to me that I'd like 'em. They're also - in a classic way - very purposefully attractive loudspeakers.

Personally, I (ahem) sort of feel that my daily drivers evoke as certain... shall we say... Harbethishness in their aesthetics ;-)

Mr. Sharpe

that's a cool looking speaker. Once 2050 rolls around I will hopefully rebuilt my DIY tower speakers lol yeah right.

20hz

Thanks , dont feal bad it took me 2 years since the LAST TIME I reviewed the cabinet program to do the final assembly !

Mr. Sharpe wrote: »

that's a cool looking speaker. Once 2050 rolls around I will hopefully rebuilt my DIY tower speakers lol yeah right.

Mr. Sharpe

hahahaha I feel better now!