Author Topic: F-1X Schematics ? (Read 346 times)

thebass · « **on:** May 08, 2003, 04:04:53 AM »

Since I bought the F-1X a few weeks ago I am very pleased with the Sound. Beeing used to tweak my sound with my TC1140 4-band full parametric EQ (I only use it now for room compensation) it took me some time to figure how the F-1X EQ works. Altough I like the sound now I still don't understand what I am doing and how the F-1X EQ works. Since I am EE engineer I would feel at home by looking at the schematics. Are there any F-1X schematics available somehow, at least the EQ section ?

mica · « **Reply #1 on:** May 08, 2003, 07:40:04 AM »

Just send an email to laurel@alembic.com with your mailing address and request for the F-1X schematic. She usually completes these kinds of requests in about one week.

thebass · « **Reply #2 on:** May 08, 2003, 12:42:25 PM »

Thanks Mica. As usual Alembics customer support is outstanding.

palembic · « **Reply #3 on:** May 20, 2003, 04:31:12 AM »

Hi Brother Werner and to anyone who may concern,

I always wondered how to connect things to each other once you start using extended rigs.
My question: has a F1-X an input on the back?
Let me explain my (wished) routing:
- bass multicable plug out of S2 into DS-5R
- back-output of DS5-R (mono) to Korg DT1pro Tuner back-input
- From Korg DT1pro Tuner Back-output to Lexicon MPX 100 Effect Back-input
- From Lexicon Back-output to

?
I should say F1-X back input.
If not available I have to come to F1-X Front input.
- The SF-2 is on the F1-X effects-loop.
- F1-X output via Frequency Crossover to PowerAmp 2 channels.

The problem is that Lexicon advices to use the effect with guitar BEFORE amp. I once put the Lexicon in the effect loop of my old trusted SWR SM400 and that was'nt a succes at all.
Some ideas of already-F1-X-owners??
Tanx

Paul the-bad(ly looking for an F1-X)-one

thebass · « **Reply #4 on:** May 20, 2003, 05:53:55 AM »

Paul, some answers to your questions:

The F1-X has no backside Input. It has two front inputs (1 and 2), a front DI output, tree backside outputs (full range, high pass, low pass) and an effect insert. The front volume pot is wired after the effect return. In your desired routing you have to use one of the front inputs for the output of the Lexicon.

But you may also try to route the DS5-R into the front input(s) and use the effect insert for the SF-2 followed by the Lexicon. I would also position the Tuner before the Lexicon to avoid tuning with a wet signal. The outputs of the F1-X can be routed directly to the Stereo/Bi-Amp PA.

In my own setting I use the fullrange output and the low pass for the PA (QSC RMX-2450). The fullrange goes to the upper half of a SWR Megoliath (4*10 + Fostex Horn) and the low pass, set at 150..200Hz to the lower half of the SWR (another 4 *10). The sound is huge to say the least and I can control the bass boost with the low pass channel volume. Because I use only a fraction of the possible RMX Power (2*750Watt RMS @ 8Ohms) but I don't use a compressor and the dynamic and clarity of the signal is really awesome.

thebass · « **Reply #5 on:** May 20, 2003, 05:59:24 AM »

BTW: I am using a tuner too and noticed that the tuner is more precise if I boost the bass and cut mids and highs completely. May be the rich harmonics of an Alembic is too much for my little Korg ...

palembic · « **Reply #6 on:** May 20, 2003, 06:31:24 AM »

Brother Werner,
I'm really ashamed but ...I don't understand what you are doing.
See if I follow you good:
1. you use the full-range out and the low-pass out on the back of your F1-X?
2. Full-range goes via a Poweramp channel f.i. A to cabinet A
3. Low-pass goes via a Poweramp channel f.i. B to cabinet B.

Correct?

I always thought you use OR full-range out (in mono-situation) OR low-pass and high-pass in Frequency-crossover for 2 channel amping???

Well ... I think I wait better until I have that F1-X on hand to try it. I will definitely mail you or give a call when I keep fumbling in the dark!!!
Tanx brother!

Paul the bad(ly puzzled) one

PS: I have a Poweramp yet. I could buy a Dynacord L-1000 for a good price via E-bay. My cabinets are Glockenklang But I think you did know that already.
Well ...it seems to me that I'm a lot more german than you my friend.
Except for the guitar of course
LOL

thebass · « **Reply #7 on:** May 20, 2003, 06:52:38 AM »

The answer to your questions:
1. yes
2. yes
3. yes
The full-range, low-pass and high-pass outputs can by used totally independent from another. There's no interaction between them (despite the crossover frequency of course). In my setting described you may also use the high-pass instead of the full-range (which I tried before). The only difference is that you loose a bit of low-end punch (using only one 4*10 instead of both 4*10). If you use the full-range like I do and set the crossover frequency higher than 200Hz the overall sound gets more low mids and looses a bit of its clarity but also becomes louder at the same PA volume.

I forgot to mention that the high-pass has its own volume pot at the front to match the balance between low-pass and high-pass out. But you will get the same effect if you adjust the channel volume of the high-pass PA channel.

BTW: the Glocks are perfect companions for an Alembic. But I like the kick in my stomach which I get from the SWR ;-))

You are welcome any time if I can help you.

xlrogue6 · « **Reply #8 on:** May 23, 2003, 08:08:01 AM »

You can use the FX return as a rear panel input--the only thing you're bypassing is a unity gain buffer stage (albeit a tube one) between the front panel inputs and the FX send. Try running the output from your Lexicon into your SF-2, then the oujtput from the SF-2 into the FX return.

You might also want to consider using your tuner as an input only device. Running it inline sacrifices a bit of your tonal integrity to no good purpose.

Kent

palembic · « **Reply #9 on:** May 25, 2003, 11:18:16 PM »

Hi Kent,

thanks for the input.
Of course I'll try this all out themoment I actually GOT an F1-X. HA!!!
Although just out of curiosity:
1. Using only the Return from the F1-X on theback, does that implicate you cannot use one of the knobs at the front? The gain f.i.

2. A tuner as input only? How can I bring that into a chain? By splitting the out cable on the back of the DS5-R?
I'm really sorry but I'm not good at this (yet ;-))

Tanx

Paul the bad one

xlrogue6 · « **Reply #10 on:** May 27, 2003, 01:38:43 PM »

All the knobs still work--the unity gain buffer is the ONLY circuitry between the front panel input and the FX send. If you were using the FX return as an instrument input you might want to add 68K series resistors, but that's not critical.

For your DT1, I'd probably use the mono output of the F1-X, since you're planning on biamping.

Kent

palembic · « **Reply #11 on:** May 27, 2003, 11:30:30 PM »

Hi Kent,

tanx ...sometimes it's so simple.
I'll keep you posted as soon as I get one.

Paul