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| Romy the Cat's
personal site dedicated to advanced audio and evolved music reproduction
techniques
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First upperbass horn is up and running. Second one is now on the lathe with hopefully a quick turnaround. Now I have to figure out how best to tune it...
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Thanks Romy,I was hoping to hear that you remain happy with your midbass solution and was surprised at the time about the small cabinets that you used for the Vitavox 15"ers, but having measured T/S parameters of the drivers here I can see that indee...
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Romy,I am considering a midbass channel similar to that you are currently using. The plan is to use the channel as a form of EQ to help rectify a large circa 40Hz room mode...bass cannons below the mode, midbass above the mode, and upperbass horn ab...
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Jorge, I remember the first time I put my hand on a 120Hz fibreglass horn with music playing and the vibrations were staggering...the horn was it's own musical instrument, making its own sounds for sure. The smaller horns were less of an issue but a...
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For a large horn like this you can't glue all the rings together and start turning because the imbalance wil shake things to bits plus you have to account for where the cutting tool can safely and physically reach. So the process is to glue a few ri...
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HifiOrDie, I've turned my own horns from MDF and the end-grain is a real bitch to finish properly. You have the outside of each sheet and the glue in between which is nice and hard and then softer material in between, sort of like tiger or zebra str...
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[quote user="Romy the Cat"]Solder 10-15 inch 10Ga wire to
you negative grounded terminal. Then begin to tough diligent points of you circuitry
with other sides of your wire. You very fast will find how to bridge you ground
in order to get rid of y...
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Jarek, because the PP introduces different grounding schema into your system I did suggest earlier that the phono may require alteration to suit. In my case, when the grounding schema was altered, one phono had a similar issue to yours and the s...
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Jarek,I would start at the beginning. Turn off and unplug the TT motor, remove the phono cable from the phonostage and use shorting plugs to short the inputs. This takes the TT/cart/arm/cable is out of the equation. Do you still have the humm? If...
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[quote user="Romy the Cat"]I do not know how about 5dB attenuation
via cable but for sure cables sound very different. Hey you are talking to a person
who have a small fortune spent for wiring my entire system with vintage Dominos
and I never felt...
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Well, I decided it was time to start using some "proper" interconnects between the preamp and DSET's, ordered them and had them delivered. To date I had been using cheap interconnects from the local electronic shop (literally $6) which should be ok...
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[quote user="Romy the Cat"]Again, it was very interesting, but… Let agree that methodologically you did not try Placette as it performance was masked out by you need to use your Neurochrome buffer to get gain. Your chain will sound as the worst eleme...
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[quote user="Romy the Cat"]Another a very valid thing to try is to see of the same difference with the same recordings happens with different DACs, preamps the you will take care of the absolute phase. [/quote]To date, my listening has been with my f...
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Now that all three are on the same absolute polarity and have been listened to quite a bit I thought it time to write down my impressions. From least preferable to most:
(3) Neurochrome Universal Buffer set to inve...
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Have put all my DHT's on the curve tracer to see if pairs can be matched for preamp duties. My stash of 10y/VT25/801a/VT62 are generally all very new or NOS specs with mu and plate resistance varying a little, but generally close to nominal specific...
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[quote user="anthony"]I have brought the Placette Active Linestage back into the room.[/quote]This comparison is proving more difficult than anticipated. Inconsistent results between subject tracks have given me some doubt on just what I have been h...
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[quote user="Romy the Cat"]Anthony, I do not know what you new buffer is. A few notes. The difference between sub 10R and 300R of output impedance is significant for the load you have (Milq) between your new buffer and your 10Y preamp. The type of th...
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[quote user="anthony"]I also have another SS pre just arrived with has been measurebated into existence with measured spec's difficult to confirm with the best measuring equipment getting about.[/quote]I've been listening to the new buffer with imd/t...
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[quote user="rowuk"]I am always a bit hesitant to buy into "listening descriptions". I am a musician and am confronted every day with Sound bias - attraction to what we are accustomed to, expectations being confirmed. We are creatures of habit and mo...
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Last night and this morning I have been comparing my favourite SS preamp with gain and the breadboarded 10y. I've been using my dac with its low 1.125Vrms voltage output as the source because I know what it is capable of and know its (lack of) sound...
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[quote user="Paul S"]Anthony, congrats on your amazing progress! I know how hard it is to carve out time for this stuff! I see you are looking for gain from your pre-amp, which makes me wonder if you have been using the passive Placette, as opposed t...
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[quote user="Romy the Cat"]Hm you are true in the “terra incognita” territory as far as I concern. The preamps are mystery to me. All my attempts to make any decently sounding preamp or even buffer failed. To me Placette was truly God sent and if I g...
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So, it has been a while. I have DSET/Macondo in stereo now although there is still some work to do to finish it and tune it to the room. As discussed earlier in this thread I need a preamp with gain and the Placette is just not cutting it for me (n...
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Impatience got the better of me, and I called two mates who prompty showed up yesterday afternoon and we hefted the second DSET into place on the horn stack. A couple of hours of connecting and checking things and it was all ready to fire up for my ...
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Thanks Romy,It is now fixed. I have left Channel B the same apart from adding a 390k positive bias resistor on the positive signal line (between C1 and R5) connected to the 14k resistor that also connects to Channel C and F. A 402k would have been ...
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Thanks for your help Romy. Have a look at this (barely legible) sketch so we have a common reference:This is Channel B First Stage bias circuit. All is identical to your published schematic apart from R9 which I had to increase to get the other sta...
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Work has been so crazy busy all last year and through these strange times right now that I have not been having any time to think about the audio project let alone indulge in advancing it. One DSET/Macondo has been playing mono and I have really bee...
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Dragged the Delta inside today and plugged a single DSET into it. Startup went ok but I was a little worried when the second stage caps started filling and Delta momentarily spiked at over 2kW draw. Once the amp was fully started draw settled at 33...
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[quote user="Romy the Cat"]There is a new interesting unit out there: Ecoflow Delta and
it has a like brother Ecoflow R600. Somebody might try them for audio...[/quote]Romy, I have a Delta here, but do not use it for audio. Would be easy enough to ...
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