Or install 20 variants of C1 over time ... bypass with JP2 as needed with particular pre-amps, music styles, or personal mood. It's years and years of A/B fun for the entire family. 😎
SJEP120R100 and SJEP120R100A are the popular ones you are most likely to find, though there are others (for example SJEP120R125 which was in some of the early samples of the First Watt J2).
One thing to note is that even though the R100A datasheet lists "High Performance Audio" as its application (https://www.farnell.com/datasheets/1455139.pdf), it is not actually a 'better' part than the R100.
Prof Mazzola explained it here: https://www.diyaudio.com/community/...120r100-power-loss.178050/page-4#post-3404798
The bottom line is that R100 and R100A both work fine for what we build here but don't pay more for R100A thinking it's superior to the R100.
"Operators are standing by. Don't delay...order now!" 🙂
...... any SJEP120R*** is going to work good enough that user is going to pee Firnis from sheer pleasure
if you think part you have in drawer is not going to work ......... just send it to OPLDF
especially if you have SJDP, which is not going to work here (without major trickery involved)
which reminds me - I still need to try that pair of SJDP (which UberGreedyBoy sent me for free) in SissySIT
hopefully one of these days
Well I was in the middle of rebuilding a pair of JLH Class A se ESL57 versions until I was distracted by the JZM so I will compare them before modifying.
They are for my mid/woofers so 3k-150Hz. but maybe I'll use one set for the tweeters and the other for the mid/ws,
🔥 😎
I've never owned a pair of electrostats, nor sadly have I had a chance to build one of Rod's projects. If I weren't scared of both my wife (a new pair of speakers might send her over the edge) and what could be the ultimate result of my lack of ability in building amps "from scratch", I'd try both.
It was many years since I owned the Quads and they predated the JLH. I can't remember which amp I used back then.
A few years ago I had a pair of Martin Logan Aeon hybrid electrostatics.but they were too difficult a load for the JLH. A Quad 405 was needed and they did sound superb until the HF output dropped off with age.
A few years ago I had a pair of Martin Logan Aeon hybrid electrostatics.but they were too difficult a load for the JLH. A Quad 405 was needed and they did sound superb until the HF output dropped off with age.
Both!.
So much so that I now use a Thomann t.racks 4x4 DSP for active crossover duties and a Dayton Audio DSP-LF for subwoofer equalisation.
Hours of fun adjusting them in real time.
These and the use of SMPS for the amps, goes completely against my former policy of keeping everything analogue. Although I haven't been tempted by digital amps.
So much so that I now use a Thomann t.racks 4x4 DSP for active crossover duties and a Dayton Audio DSP-LF for subwoofer equalisation.
Hours of fun adjusting them in real time.
These and the use of SMPS for the amps, goes completely against my former policy of keeping everything analogue. Although I haven't been tempted by digital amps.
Progress report!
Particularly @birdbox who gets a chuckle every time I say progress report.
No porn no glory!
Night folks!
Particularly @birdbox who gets a chuckle every time I say progress report.
No porn no glory!
Night folks!
presuming ( not checking) it is 300VA/2*18Vac, that's enough - practically same as in FW PSU
in my dual mono builds, I'm using 250VA Donut per channel
in my dual mono builds, I'm using 250VA Donut per channel
I'll back up ZM. The AS-3218 is perfect. It's is 300VA 2x18V. The "S" in AS denotes a shield, which is what you want. That shield is the purple wire, which you connect the chassis floor.
that's probably single thing in entire amp which you can electrically connect to top of central Donut bolt
I'm really excited this has come out. I've done a pair of ACAs and I'm going to use this as a stepping stone to a higher level. Probably acquire everything later in the summer and do it as a fall project. Maybe F5 Turbo next.
Just explain that loudspeakers are like shoes?🔥 😎
I've never owned a pair of electrostats, nor sadly have I had a chance to build one of Rod's projects. If I weren't scared of both my wife (a new pair of speakers might send her over the edge) and what could be the ultimate result of my lack of ability in building amps "from scratch", I'd try both.
Shoutout to @birdbox who sent me a box of all the components I needed for this build, including the big washers for the FET’s. Also to @ItsAllInMyHead and @Toys4Boys with answering some simple questions.Goodnight!