UcD II gain (Off Topic)

by GC, Saturday, February 17, 2007, 19:37 (3987 days ago)

I can see from the standard UcD D700 it has a gain of 26 db. (Could be "worse" for high efficient speakers.)
The super version of this amp might have the same gain?

Worse is if active pre-amps are used with an additional gain of, say 20 db! Then the pot should likely be changed in such pre-amp. There are many on offer out there.

TVC's, well a big gain in the following amp could be "controlled" by one with many more in/out incrediments or a standard off the shelf good sounding one with the right exchange ratio.

I do not think that Hypex is "open" to set the gain spec against the use of TVC's and speakers with a >110 db/watt/m.
How many potetial buyers of that amp. pocess that efficient speakers? :pleasantry:

GC

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UcD II gain

by Bert @, Saturday, February 17, 2007, 19:54 (3987 days ago) @ GC

Hi GC,

TVC's, well a big gain in the following amp could be "controlled" by one
with many more in/out incrediments or a standard off the shelf good
sounding one with the right exchange ratio.

That reminds me... if the guys at Hypex would be so kind to have the input impedance high (say around 100k) and the amplification similar to the NF's then it should amplify more than enough in combination with passive pre-amps and high sensitive loudspeakers.

If they do need to have full power at the output then let them design a pre-amplifier that gives enough input from say 2V (nobody uses 200mV these days!) up to the needed voltage to have the full 700W at the other end.

I do not know what the gain of the NF is though but that worked okay in combination with the TVC and the TwinDAC's low output.

Ciao,

Bert

--
BD-Design - Only the Best!

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UcD II gain

by GC, Saturday, February 17, 2007, 20:08 (3987 days ago) @ Bert
edited by GC, Saturday, February 17, 2007, 20:13

That reminds me... if the guys at Hypex would be so kind to have the input
impedance high (say around 100k) and the amplification similar to the NF's
then it should amplify more than enough in combination with passive
pre-amps and high sensitive loudspeakers.

If they do need to have full power at the output then let them design a
pre-amplifier that gives enough input from say 2V (nobody uses 200mV these
days!) up to the needed voltage to have the full 700W at the other end.

I do not know what the gain of the NF is though but that worked okay in
combination with the TVC and the TwinDAC's low output.

Ciao,

Bert

Yes Bert.

Well you and I use a TVC which does not amplify and the 26 db gain from the amp (if that will be the result) would maybe be fine in our case. Regardless your TD's 0,7V peak-peak output or my vintage 2V RMS DAC.

The only concern is that we have a way to come loud in small incrediments.
It would be irritating to go from 0 db to 100db at the first step on the attenuator.

If I know amp designers way of thinking right, they would set full power at 2V input.

Our speakers would be able to swallow a peak of 2 Kw without leaving this world or start a fire, should a "click" occour. But of course as Peter mentioned,...the windows?

:smile: GC

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UcD II gain

by Bert @, Saturday, February 17, 2007, 20:15 (3987 days ago) @ GC

Even better, if possible for amplifier manufacturers, is to make a selection switch (or jumper(s) for what I care) to set the gain. This way we can choose between 0dB, 12db or 24dB gain or even more if needed for extremely low sensitive systems.

If a speaker of 90dB is the reference for standard amplifiers giving the ability to use the whole volume control range then we need 22dB less gain.

Peter, please pass that on to Hypex, hopefully their design can be implemented with this? They can even advertise with it to give their amp something extra worthwhile, too much gain is a common problem with many systems!

Ciao,

Bert

--
BD-Design - Only the Best!

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UcD II gain

by GC, Saturday, February 17, 2007, 21:05 (3987 days ago) @ Bert

If a speaker of 90dB is the reference for standard amplifiers giving the
ability to use the whole volume control range then we need 22dB less
gain.

Alohaaa...:shame:

Some D-amp manufactorers are offering amps by order with different gain sets.
The jumper idea is just what we need. :cool:

GC

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UcD II gain

by soundcheck @, Germany, Saturday, February 17, 2007, 22:09 (3987 days ago) @ GC

Hi folks.

The jumper idea is a good one. My old (13 years old) Jeff Rowland Amps, I used to listen to, do have it.


Another advantage:
You could solve the gain mismatch issue between fullrange and subs amps.
If you're lucky you can match it this way, that you run the two amps with a different gain, one for the subwoofer one for the fullrange.

That's actually how my system works!

Cheers
Klaus

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UcD II gain

by PeterSt. ⌂ @, Netherlands, Sunday, February 18, 2007, 04:06 (3987 days ago) @ Bert

Even better, if possible for amplifier manufacturers, is to make a
selection switch (or jumper(s) for what I care) to set the gain. This way
we can choose between 0dB, 12db or 24dB gain or even more if needed for
extremely low sensitive systems.

If a speaker of 90dB is the reference for standard amplifiers giving the
ability to use the whole volume control range then we need 22dB less
gain.

Peter, please pass that on to Hypex, hopefully their design can be
implemented with this? They can even advertise with it to give their amp
something extra worthwhile, too much gain is a common problem with many
systems!

Ciao,

Bert

Hi Bert,

I will.

Peter:sleepy:

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UcD II gain

by GC, Sunday, February 18, 2007, 08:17 (3987 days ago) @ PeterSt.

I will.

Peter:sleepy:

Was it a good party?

Hope dreams were nice and good morning. :smile:

G

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