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Building a Pre Amp |
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SMP
Young Croc
Joined: 16 March 2013 Location: East London Status: Offline Points: 1209 |
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Posted: 14 May 2013 at 10:20pm |
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er do not really think a digital 9088 will sound anything like what is required nice idea though. I do not like digital kit too much I prefer analogue. we bought a lot of FDS388 when they first appeared on the market sounded awful sent them back or sold them on removing them from hire stock. tried many others as well Dynacord XTA now use FDS360 DDA500 all heavily modded nice warm analogue really see little point in doing like a pal does takes Analogue to LS9 or MC7L then sends it analogue to XTA or KT then analogue to his Labgruppens pointless!!! keeps changing domains a very bad n sad thing to do
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shagnasty
Old Croc
Joined: 30 July 2007 Location: Guildford, UK Status: Offline Points: 7683 |
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Posted: 14 May 2013 at 10:27pm |
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I've done a few link-up where I have taken the outputs of a pre-amp and mixed them on a SW9088 so the system could control 721s,718s + Floodlights all with Turbo-spec crossovers but still have the control the pre-amp offered, worked amazingly well and let me sleep while the system was happy, I understand the analog/digi argument and as such don't use LS9s/M7CLs as their is no point in paying what I charge and not giving viable tools for the job, I am sure every Bingo house needs an LS9, do don't bring a Bingo rig to a gig.A properly set-up 90xx or Blu is more than a match for a DDA-500...
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SMP
Young Croc
Joined: 16 March 2013 Location: East London Status: Offline Points: 1209 |
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Posted: 14 May 2013 at 10:38pm |
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depends what you mean by "More than a match"...it is still digital so loses some of the information as it can only achieve 72% oof it no matter what sample rate or bit depth you use Nyquist will tell you that.
It may be clean with a low noise floor etc But analogue well designed is always more pleasing to the ear. Music is not all about specs but about Timbre or character hence wrong is sometimes more right than right which often sounds so wrong. My analogue FDS DDA sound really good using Burr-Brown upgrades not cheaper TLO or NE devices FDS give you a good level of control over a band with the breakouts I have dynamic feedback integration on mine an idea I nicked from Bruce Howze after having too much grief with the dodgy SC22 controllers we had and not finding the DSC's not much better |
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Nitz V1505
Old Croc
Joined: 16 September 2009 Location: UXBRIDGE Status: Offline Points: 1719 |
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Posted: 15 May 2013 at 10:28am |
I got a circuit diagram for a grounded grid coscode (I think) phono preamp which has got very low noise and THD for a valve and even puts a lot of top op amp designs to shame. I love the idea of having a full valve set but would prove to expensive in this time. I reckon with a valve pre used with my transistor amps Ill get the sound Im after. |
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LET THE BASS ROLL LIKE THUNDER
& THE TOPS LIKE LIGHTNING..... |
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SMP
Young Croc
Joined: 16 March 2013 Location: East London Status: Offline Points: 1209 |
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Posted: 15 May 2013 at 1:13pm |
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I have given a fleeting thought only fleeting mind to building a simple line driver using valves just to give a signal a "Valve" sound. Perhaps I will get around to it at some future point. just have so many other project on the drawing board at present that it gets pushed to the end of the queue. there is absolutely no reason why a Valve would not or cannot put a "Solid State" circuit to shame if well designed with a good PSU it can perform with excellence. I have also seen MOSFETS used in a similar config Topology to Bottles in Class A auddio amps with good results. came across a Japanese Bespoke Builder some years back building transformer coupled types running on Battery power using just one or two power devices thus arranged producing very valve like results. do not recall his name only knew him as "Bay" a friend of one of my Mentors the late Dennis Tryckett a great Valve man who thought me a great deal about bottles
so crack on I say give it a go you may like the results as well as the journey |
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Nitz V1505
Old Croc
Joined: 16 September 2009 Location: UXBRIDGE Status: Offline Points: 1719 |
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Posted: 15 May 2013 at 6:06pm |
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Got a Berry ultragain pro warming up the signal at the moment and it is definately one if their finest offerings. When I do get round to it Im thinking separate psu and hardwired circuits. Id use a cathode follower op stage for low impedance.
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LET THE BASS ROLL LIKE THUNDER
& THE TOPS LIKE LIGHTNING..... |
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SMP
Young Croc
Joined: 16 March 2013 Location: East London Status: Offline Points: 1209 |
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Posted: 15 May 2013 at 6:27pm |
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Hey Nitz...has that berry got a tube in it then?
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TRE4U2NV
Old Croc
Joined: 21 May 2005 Location: home Status: Offline Points: 0 |
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Posted: 15 May 2013 at 6:51pm |
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Dennis Tryckett i was taught a great deal by this man when he was in bell st
to many secrets to reveal here
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Nitz V1505
Old Croc
Joined: 16 September 2009 Location: UXBRIDGE Status: Offline Points: 1719 |
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Posted: 15 May 2013 at 7:37pm |
Yes it has 12AX7 in the preamp section but the eq and hp filters are solid state. Sounds good and is very clean suited for both studio and live work. But I need a unit for on sub to add that growl im looking for!!!! Edited by Nitz V1505 - 15 May 2013 at 7:37pm |
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LET THE BASS ROLL LIKE THUNDER
& THE TOPS LIKE LIGHTNING..... |
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SMP
Young Croc
Joined: 16 March 2013 Location: East London Status: Offline Points: 1209 |
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Posted: 15 May 2013 at 8:25pm |
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ok that means I know who you are!!! how you doing? still messing around with hot glass tubes I take it?
still miss him taught me much about tubes and Bees!!! |
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Chris I Rockas
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Joined: 16 April 2007 Location: United Kingdom Status: Offline Points: 75 |
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Posted: 16 May 2013 at 3:37pm |
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Greetings Nitz V1505 and SMP....
Your talking about tubess in the signal chain prompted me to refer you to this little "exchange" some years back. Enjoy the Pic!
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Think you can, you will. Think you can't, you won't.
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championdrei
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Joined: 28 September 2011 Status: Offline Points: 119 |
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Posted: 15 October 2014 at 6:29am |
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Nice to see the interest in building pre amps
If I ever do build one I want it to be like a barracuda. even though barracuda doesn't build anymore his pre amps have a unique sound to them like the tops for instance. I haven't heard 1 pre amp sound as criss as a barracuda. if only I could be barracudas apprentice
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respect
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