Hypex UcD AS2.100

[Matthijs_Hypex]

Can a single PSC2.400 be used to drive stereo bass bins with lowpass in the 200-300Hz region?

Frode

One PSC2 has only one channel analogue audio input.

 

[Vathek]

Thank you Matthijs for the explanation. I must confess I obviously don't really understand how digital volume control/dithering works, but I'm sure you know what you're saying

But as you say hiss might be a problem, it just seems crazy to have a 400W amp on 110dB tweeter in a studio midfield application. Ideal for me would be PSC2.400 with just a 100W for the tweeter, but I can live with just 100W for the bass driver and the consumer (cinch, spdif instead of XLR and AES/EBU) plugs. So I think the AS2.100 will be better for my application.

Thanks again

 

[Vathek]

Matthijs, let me reword my question. Let's see if I got the concept right: The PSC outputs 200W into 8 ohm. If my tweeter has a bit more than 100W per dB after EQ and I want to run the speakers at normal volumes I need say half a Watt. That's 200->100->50->25->12->6->3->1.5->.75W, or 8 times 3dB or 8bit of resolution, right? That means that the speaker running at about 95dB only has 16bit of resolution left and less when run even quieter.

Therefore my question, am I missing something or is this a conceptual problem? Also, what does the "Group Volume" slider in the software do? Is this to adjust the sensitivity? If so, how does it work?

Thanks, David

 

[Matthijs_Hypex]

Matthijs, let me reword my question. Let's see if I got the concept right: The PSC outputs 200W into 8 ohm. If my tweeter has a bit more than 100W per dB after EQ and I want to run the speakers at normal volumes I need say half a Watt. That's 200->100->50->25->12->6->3->1.5->.75W, or 8 times 3dB or 8bit of resolution, right? That means that the speaker running at about 95dB only has 16bit of resolution left and less when run even quieter.

Therefore my question, am I missing something or is this a conceptual problem? Also, what does the "Group Volume" slider in the software do? Is this to adjust the sensitivity? If so, how does it work?

Thanks, David

The number of used bits is not important because the noise is comming out of the converters. This noise is a fixed value and therefore not dependant of the signal value. You will have to focus on getting the lowers micro volts noise out the output of the amplifier.
For the AS2 this will be a bit lower because the gain is lower.

Group volume is standard volume control. When you use a preamp you can set this to a fixed value and leave it.

 

[Vathek]

Thanks Matthijs, apparently my calculation was wrong, there's only 4 bits of loss. But that still holds. I understand the dither noise issue and mostly the hiss issue from strong amps, but I don't see how the resolution loss doesn't matter. The question is, whether it might be negligible, probably so actually. I wish there was a smalle PSC as I just hate cinch/spdif.

 

[granoj]

I just ordered one AS2.100. I will have it tomorrow but i`ve been playing around with the filter designer and it seems I can`t, for some reason successfully import the impulse response files. I`m on Mac and my soundcard has no windows drivers, so the only reasonably priced software to measure my speakers is Fuzzmeasure. From Fuzzmeasure i get .csv files that contain the impulse response data. When i open it to texteditor it looks like this:

Time (ms),V/Vmax,
0.000000,0.060331,
0.020833,0.040011,
0.041667,-0.017255,

Hypex FAQ says " The file format is quite simple: a text file containing the impulse response. Each line contains one number, which is one sample of the impulse response. If your MLS tool supports exporting of the impulse response, you can usually tailor that file to work with the DSP tool. "

So my question is, how do i modify it?

-Jarno

 

[Henkjan]

this is what I did (please note that this was with the previous version of the software; I'm sure Matthijs or Jan-Willem will correct me if this is different in the current version):
import into a speadsheet (OO, excel, whatever) and then remove the column with the time data. and then export as csv again. also (again, this was the case with the v1 of the software) I had to make sure my measurement software was using 48kHz sample freq.

 

[kbergsson]

Plate or module

Hi I was thinking of building monoblocks using UCD400HG HXR and SMPS400/400 and then I saw the PCS2.400d plate amps.
The plate amp solution is more flexible and would give me the possibility of adding subs later. What is the better sounding solution or are the plate amps and the UDC400HG HXR of same audio quality.
I would run the PCS2.400's in bridged mode initially and might add subs later.
Kjartan

 

[kbergsson]

Sorry saw #181 and #182.

 

[Pepe]

Hi.
I have a probably really stupid question regarding the as2.100d (psc2.400d) digital and as2.100 (psc2.400) analog plate amps and how they work together.
So for a fully active 2 way 2 channel system would I need two d modules or would one d module and a analog module work together? I mean does the master amp send an analog signal to the other plate amp or is digital.
I'm quite confused about this, asked a hypex vendor here in Sweden and they were as clueless as I.
Hope you can clear this out for me since I want to by two hypex plate amps soon and hook it up via usb to my computer.

Thanks Pepe

 

[Colin]

I have recently been using a pair of AVI ADM9s, a commercial speaker/preamp/DAC system which has been around for a few years and operates the same way as the Hypex.

In the case of the AVIs, the master speaker contains the preamp/DAC for the system. Each speaker contains the active amps and crossover electronics. The slave is linked to the master via a standard audio cable.

So for a digital-in, stereo system using the Hypex plate amps, you'll need the as2.100d for the master speaker, and the analog only as2.100 for the slave speaker.

 

[Pepe]

Thanks Colin for clearing this out for me.

Pepe

 

[Colin]

You're welcome, Pepe. The Hypex looks a really nice system and very versatile.

 

[gonkius]

I'm planning a omni-directional project with 6 woofer/midrange 4" drivers in each speaker. I will use the AS2.100 modules and now I must select what impedance I should use on the speakers, 4 or 8 Ohms. Different connections will give me some total impedance of 2.7, 5.3 or 6.0 OHms.

What total impedance do all think is the most optimal to get the highest output power and quality? My vote right now is to go for the 5.3 Ohm solution.

 

[Matthijs_Hypex]

I have recently been using a pair of AVI ADM9s, a commercial speaker/preamp/DAC system which has been around for a few years and operates the same way as the Hypex.

In the case of the AVIs, the master speaker contains the preamp/DAC for the system. Each speaker contains the active amps and crossover electronics. The slave is linked to the master via a standard audio cable.

So for a digital-in, stereo system using the Hypex plate amps, you'll need the as2.100d for the master speaker, and the analog only as2.100 for the slave speaker.

I have to correct some here. First part is correct but If you want a setup with digital in you'll need the slave to be digital too. Because the digital inputs are not converted to analogue before they are transmitted to a slave.
See page 7 and 10 of the manual.
We will make this section of the manual clearer.

 

[Kradkate]

as2.100 with problems

Hello Everybody,

I have a pair of AS2-100 too.
But there are some problems!!!
I want to use them as a mono amp for my woofers but I miss the "jumper" :-(((

The second problem: In the owners manual on page 9/10:
In bridged mode the jumper (see figure 2) must be placed and the speaker
must be connected between J4 speaker+ and J2 speaker+. In all other
setups the jumper is not placed!
Two times + ??? is that right???

Third problem: The Amp isn´t loud enough!
Is there a bug in my configuration?
Thanks for help )))

Regards
Karsten

 

[Matthijs_Hypex]

Hello Everybody,

I have a pair of AS2-100 too.
But there are some problems!!!
I want to use them as a mono amp for my woofers but I miss the "jumper" :-(((

The second problem: In the owners manual on page 9/10:
In bridged mode the jumper (see figure 2) must be placed and the speaker
must be connected between J4 speaker+ and J2 speaker+. In all other
setups the jumper is not placed!
Two times + ??? is that right???

Third problem: The Amp isn´t loud enough!
Is there a bug in my configuration?
Thanks for help )))

Regards
Karsten

Hi, I'm sorry to hear the jumper is missing. Can you solve it in any way? Soldering the two pins or shorting them in another way would do.

Bridged mode means you take two amps of which one is out phase. By this you will get doubled signal. See pages like Bridgeable Amplifiers for clear explenations.

When you use the module in bridge mode you will have to set the same filter for both channel 1 and 2. And you will have to select "bridged" mode in the control panel.

 

[Kradkate]

thanks

Hello Matthijs,

thanks for your answer.

If I understand your message I have to use the + two times (in brigr mode)!?
The things with the jumper is clear for me

I couldn´t try it untill now, because one amp is in your workshop...

thanks and regards
Karsten

 

[Pepe]

I'm planning a omni-directional project with 6 woofer/midrange 4" drivers in each speaker. I will use the AS2.100 modules and now I must select what impedance I should use on the speakers, 4 or 8 Ohms. Different connections will give me some total impedance of 2.7, 5.3 or 6.0 OHms.

What total impedance do all think is the most optimal to get the highest output power and quality? My vote right now is to go for the 5.3 Ohm solution.

Gonkius, I guess you are planning something like this, Audelity Home - Audio Fidelity

I think they use the hypex module in that particular design, correct me if I'm wrong.

I read on some Swedish forums about the design, apparently very nice.

Pepe

 

[gonkius]

Correct, my plan is to clone these OD10 speakers. I now have 12pcs of 4"-woofers (8-Ohm) Dayton ND105, a pair of used Scan-speak (D2904/7100) domes and two AS2.100 modules. They use the same Hypex modules in the original for sure.