Show me your ****(embly), and let me get in your guts baby!
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billbillw wrote:Wes,
That's pretty cool to see the two amps side by side (well almost). I can see subtle differences on the input board and the power supply boards are bigger. Those white ceramic things are resistors and I have no idea why there are so many. These amps are more similar than they are different, that's for sure.
Definitely lots of similarities.
I suppose John Curl just smoothed out the edges of an otherwise very good design to make a great one.
WesLink: http://polkarmy.com/forums
Panasonic TH-42PHD8UK 42" HDTV | Polk Audio SDA-SRS's (w/RDO's & Vampire Posts) + SVS PC+ 25-31 | AudioQuest Granite (mids) + BWA Silver (highs) | Cary Audio CAD-200 | Signal Cable Silver Resolution XLR's | Wyred 4 Sound STP/SE Pre | Signal Cable Silver Resolution XLR's | Cambridge Audio azur 840C--Wadia 170i + iPod jammed w/ lossless audio--Oppo 970 | Pure|AV PF31d -
Here is my little amp that has 150 wpc driving a pair of rt400 vintage polks!!:DMy gear,
Acer PH530 720P PJ
100 inch Da-Lite Video Spectra screen
Yamaha HTR 5790
Toshiba HD-A3
Denon 1600 dvd player with sdi out,
DVDO iSCAN HD+
Panasonic Dmr E-80H
Dishnetwork HD pvr
1 Audiosource amp300 150 wpc Fronts
1 Audiosource ampone bridged 200 watts powering center
1 Onkyo M-282 105 wpc amplifier sides
polk cs400 center
polk RT400 mains
Polk mkII back surrounds,
Polk FX300fxi dipole surrounds
Velodyne DPS-10 sub
Klipsch KSW-10 sub.:cool: -
Correct, the Mark II in relation to any HCA series from Parasound indicates John Curl work. That was when he started working/consulting for Parasound.CTC BBQ Amplifier, Sonic Frontiers Line3 Pre-Amplifier and Wadia 581 SACD player. Speakers? Always changing but for now, Mission Argonauts I picked up for $50 bucks, mint.
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billbillw wrote:Those white ceramic things are resistors and I have no idea why there are so many.Testing
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GV#27 wrote:They are the emitter resistors for the output transistors.Each output transistor will have one.
Not exactly. The emitter resistors are located on each output board. They are grey striped resistors, not the big white ceramics. The emitters can be seen in my closeup of the transformer. On my 2200ii, the big white ceramics are all attached to the power supply boards. I haven't taken the time to look at the schemetic and figure out their purpose yet.
EDIT: I was wrong about the white ceramic things. I looked at the schematic and then again at my pictures. Those are not resistors at all, they are film caps. All part of the power filtering.For rig details, see my profile. Nothing here anymore... -
billbillw wrote:Not exactly. The emitter resistors are located on each output board. They are grey striped resistors, not the big white ceramics. The emitters can be seen in my closeup of the transformer. On my 2200ii, the big white ceramics are all attached to the power supply boards. I haven't taken the time to look at the schemetic and figure out their purpose yet.
The ones connected to the filter caps in yours are probably to help discharge the caps after turn off or are used in combo with a small cap to shunt hi frequency noise.Testing
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I-SIG wrote:Y'all,
Here's the insides of my Parasound HCA-2200.
Notice the massive stacked torodial trannies and dual sets of caps.
Everything else seems pretty bread & butter, just on a bigger scale.
Anyone know where I can get some nice metal binding post nuts to replace the crappy plastic ones that are breaking? I'm gonna post this question in another thread since this one is way looooong.
ETA: Seems like the MkII has almost double the little white, ceramic looking things that are part of the output sections. That and the switches for un/balanced seem to be the only non-cosmetic differences that my untrained eye can see. ***BTW, my 2200 is SDA-safe.***
Wes
Wow Wes those pics exude power!!! -
I looked back on the schematic for my HCA-2200ii. Those big white "ceramic" looking things in I-SIG's and my amp are film caps, not resistors. That's what happens when you just don't look close at something.For rig details, see my profile. Nothing here anymore...
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Parasound HCA-1000 pics coming tonight!
WesLink: http://polkarmy.com/forums
Panasonic TH-42PHD8UK 42" HDTV | Polk Audio SDA-SRS's (w/RDO's & Vampire Posts) + SVS PC+ 25-31 | AudioQuest Granite (mids) + BWA Silver (highs) | Cary Audio CAD-200 | Signal Cable Silver Resolution XLR's | Wyred 4 Sound STP/SE Pre | Signal Cable Silver Resolution XLR's | Cambridge Audio azur 840C--Wadia 170i + iPod jammed w/ lossless audio--Oppo 970 | Pure|AV PF31d -
Parasound HCA-1000 pics coming tonight!
Wes
I can't wait in that I never opened mine up. -
Y'all,
Here's the happy snaps of the interior and **** of the Parasound HCA-1000A. It's like a mini-single transformer 2200, kinda.
WesLink: http://polkarmy.com/forums
Panasonic TH-42PHD8UK 42" HDTV | Polk Audio SDA-SRS's (w/RDO's & Vampire Posts) + SVS PC+ 25-31 | AudioQuest Granite (mids) + BWA Silver (highs) | Cary Audio CAD-200 | Signal Cable Silver Resolution XLR's | Wyred 4 Sound STP/SE Pre | Signal Cable Silver Resolution XLR's | Cambridge Audio azur 840C--Wadia 170i + iPod jammed w/ lossless audio--Oppo 970 | Pure|AV PF31d -
Y'all,
Here's the happy snaps of the interior and **** of the Parasound HCA-1000A. It's like a mini-single transformer 2200, kinda.
Wes
Gee what a coincidence, mine looks just like that except for the S/N. -
Y'all,
Here's the happy snaps of the interior and **** of the Parasound HCA-1000A. It's like a mini-single transformer 2200, kinda.
Wes
Actually looks just like the inside of an HCA-1500a, but smaller everything. The layout is almost exactly the same.
See Gator's post here:
http://www.polkaudio.com/forums/showpost.php?p=532815&postcount=257For rig details, see my profile. Nothing here anymore... -
Actually looks just like the inside of an HCA-1500a, but smaller everything. The layout is almost exactly the same.
See Gator's post here:
http://www.polkaudio.com/forums/showpost.php?p=532815&postcount=257
Well now that I've seen that I want that one instead! -
Beefy Class A amplification that I don't own :mad: .
Pics 1 & 2 Threshold 400A stereo amps
Pics 3 Threshold One Mono amp."Appreciation of audio is a completely subjective human experience. Measurements can provide a measure of insight, but are no substitute for human judgment. Why are we looking to reduce a subjective experience to objective criteria anyway? The subtleties of music and audio reproduction are for those who appreciate it. Differentiation by numbers is for those who do not".--Nelson Pass Pass Labs XA25 | EE Avant Pre | EE Mini Max Supreme DAC | MIT Shotgun S1 | Pangea AC14SE MKII | Legend L600 | BlueSound Node 3 - Tubes add soul! -
Found this shot of a VSX49TXi Elite online. Pretty decent innards really...
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Here is my little amp that has 150 wpc driving a pair of rt400 vintage polks!!:D
That Audiosource amp looks real solid there. -
Here's a few pics of my Marsh A400. It's got the biggest transformer I've seen -- about 6 in. in diameter and about 4 in high. The blue caps are 15,000 uF capacitance each.HT/2-channel Rig: Sony 50 LCD TV; Toshiba HD-A2 DVD player; Emotiva LMC-1 pre/pro; Rogue Audio M-120 monoblocks (modded); Placette RVC; Emotiva LPA-1 amp; Bada HD-22 tube CDP (modded); VMPS Tower II SE (fronts); DIY Clearwave Dynamic 4CC (center); Wharfedale Opus Tri-Surrounds (rear); and VMPS 215 sub
"God grooves with tubes." -
Here's a few pics of my Marsh A400. It's got the biggest transformer I've seen -- about 6 in. in diameter and about 4 in high. The blue caps are 15,000 uF capacitance each.
That's purrrrrrrrrrrrrrrrrty...I like the simple look of the faceplate.... -
The biggest transformers Ive seen were in UNC's amp - the Anthems.
Talk about BEAST.- Not Tom ::::::: Any system can play Diana Krall. Only the best can play Limp Bizkit. -
Nice design in the amp.engtaz
I love how music can brighten up a bad day. -
Just dug this out of storage today.It as Nelson Pass diy Mosfet design that I built several years ago and no longer use.It is a good sounding unit with the mosfets imparting a tube like quality.I put the transformer in a separate case to avoid induce any AC hum. I guess I better find it a new home instead of letting it collect dust.Testing
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Just dug this out of storage today.It as Nelson Pass diy Mosfet design that I built several years ago and no longer use.It is a good sounding unit with the mosfets imparting a tube like quality.I put the transformer in a separate case to avoid induce any AC hum. I guess I better find it a new home instead of letting it collect dust.
Nice looking piece, good work. -
hearingimpared wrote: »Nice looking piece, good work.Testing
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Just dug this out of storage today.It as Nelson Pass diy Mosfet design that I built several years ago and no longer use.It is a good sounding unit with the mosfets imparting a tube like quality.I put the transformer in a separate case to avoid induce any AC hum. I guess I better find it a new home instead of letting it collect dust.
Real nice DIY stuff GV, thanks for posting it.CTC BBQ Amplifier, Sonic Frontiers Line3 Pre-Amplifier and Wadia 581 SACD player. Speakers? Always changing but for now, Mission Argonauts I picked up for $50 bucks, mint. -
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Got my Emotiva UL combo about 2 weeks ago, but the processor was DOA.
Here's some pics pf the LPA-1 amplifier. -
With a title heading like this I could hath sworn it was a **** video flick thread.:D
I guess titles for threads is getting harder and harder to come up with?
So its about an amplifier and whats under the bonnet so to speak hay? Well Id like to get the lid of my Alesis RA300 for a few picture takings?
Looking at the above post Im wondering what is the cost of the amplifier unit (LPA-1) looks costly and the best ways or solutions for better home cinema is via active crossover. And seeing theres six amplifiers onboard the (LPA-1) and yes I know its designed for a 6 channel LCR left and right and centre back surrounds!
But what is the cost? It would be great if you can install a few of these one for LCR active crossover for the fronts one more for the surround channel arrays including (height surrounds overhead) yeah I bet you havent got height surrounds.
And one more for the sub bass arrays! Its best to use the same amplification for all loudspeakers arrays just like how they do it in the professional THX cinemas!:p
Dont bother with active powered sub bass units there a waste of time, use passive cinema 18" types and with a little ingenuity a few DCX2496 you can have a one hell of a home cinema sound system that would surpass your last home cinema sound system. -
Got my Emotiva UL combo about 2 weeks ago, but the processor was DOA