Daudio Asp User manual

daudio
Daudio ASP/AMP
User manual 8 June 2014

daudio
Introduction
The daudio ASP/AMP is a 2 channel high quality amplifier ith integrated active
filter, specifically designed to let the loudspeaker sho hat it is capable of. It gets
the very best out of the loudspeaker and no additional po er amplifier is required.
For a stereo system you need a pair, one ASP/AMP for each loudspeaker, a better
channel separation is not possible. To complete your system of daudio ASP/AMPs
and loudspeakers, all you need is a high quality source ith volume control.
The AMP (amplifier part) is designed to meet the needs of customers ho demand
the utmost in control and musicality from their daudio loudspeakers. It contains a
po er supply hich can deliver a total of 400W continuous and 600W peak po er.
The amplifier modules are each able to deliver 250W to 4Ω, 180W to 8Ω and a peak
current of 14A. As a result, even speaker impedances of 2Ω are no problem. The
state-of-the-art amplifier technology achieves an efficiency of 92%. Therefore no
heavy heat sinks are required, the small aluminum enclosure is sufficient to prevent
the temperature from rising too high.
The amplifiers are equipped ith special input stages developed by daudio. These
input buffers/preamps have an almost immeasurable distortion of 0.00003%. They
are equipped ith a separate discrete po er supply. The discrete po er supply is
much faster and more silent than the standard po er supplies hich are found In
virtually all audio electronics even if they are of top quality. The result is an amplifier
that possesses all the qualities needed to both control heavy lo -impedance oofers
as to offer utmost sophistication for the highest frequencies.
The ASP is the active filter for the loudspeakers. The term ASP for the active filter as
a conscious choice for our state-of-the-art analog counterpart of the ell-kno n DSP
(digital signal processing) and stands for analog signal processor. The filter is
equipped ith its o n discrete po er supply, just like the input buffers/preamps. The
daudio ASP has been designed to separate the analog signals from your source into
the lo er frequencies belo 150Hz and the mid and high frequencies above. At the
same time, equalizing and dipole correction are being applied to guarantee a smooth
frequency response hen reproducing the sound through the daudio loudspeakers.
The dipole operation of the daudio loudspeaker implies that this frequency
response ill be almost identical across the hole spectrum, even at listening angles
off-axis from the loudspeaker. Aside the loudspeaker a eakened copy of the sound
ill exist, from lo to high frequencies even for the bass, hich is exceptional. This
so-called 'radiation behavior' ill ensure that your listening room ill be irradiated
optimally and ith uncolored sound. Any here in your room, even outside the
preferred listening position, a nice tonal balance ill be heard. The daudio ASP is a
vital component to achieve this.

daudio
Electrical safety
On the inside of the housing of electronic equipment, high AC and DC voltages exist.
The case should therefore not be opened. daudio accepts no responsibility for
injury or damage caused by opening of the housing or by connecting to a po er
supply voltage other than 220/230Vac 50Hz.
The amplifier needs sufficient space around the housing (at least 2" around) and
placed on feet 0.6" high, to enable sufficient heat dissipation at high ambient
temperatures.
Connection and operation
Remote on/off Input Output
220/230Vac 50Hz bass level line output
Warning: Connect the daudio AMP completely before plugging the po er cord into
the socket!
Remote on/off
You can put the amplifier on and off ith a remotely controlled voltage source of
5Vdc. To be able to use this option you should keep the 220/230Vac s itch in the 0-
position. A matching cable of 50cm ith mini-plug is included ith the ASP/AMP. The
daudio DAC ith volume control is equipped already ith the necessary voltage
source. By putting the daudio DAC ith volume control in standby you s itch the
ASP/AMP off.
Bass level control
In the picture above you ill note a turning knob for 'bass level'. This adjustment is
meant to match the amount of dipole correction on your listening room, should there
exist too much annoying room resonances or too much bass lift. The adjustment is
very precise, for this a 10-turn volume control has been applied.

daudio
In the response curve belo it is depicted ith colored lines ho the adjustment
orks in the audible range from 20-20.000Hz.
black line: adjustment maximal (10 turns clock ise)
blue line: adjustment t o turns less than maximal (counterclock ise)
red line: adjustment five turns less than maximal (adjustment half ay)
green line: adjustment minimal (10 turns counterclock ise)
Analoge input
Please use the exceptionally high grade daudio XLR audio cable that came ith the
daudio ASP AMP to connect your source ith volume control.
Analog line output
This output can be left alone unused. Use this XLR-output any ay if you ant to
connect the ASP mid/high output ith your o n high quality po er amplifier, just in
case that you do not ant to use the daudio po er amplifier for the mid/high
section of the loudspeaker.
Speakon loudspeaker output
Please use the daudio loudspeaker cable ith Speakon loudspeaker connectors that
came ith the loudspeakers to connect them to your daudio ASP AMP. The
accessory Speakon connectors have four connections +1, -1, +2 and -2. The '1'
connections are for the mid/high part of the loudspeaker, the '2' connections are to
be connected ith the oofers. Take care that you maintain correct polarity, in case
you ant to use different loudspeaker cables than the ones you got from daudio.

daudio
Technical specifications ASP AMP
Input: Neutrik NC3FD-LX-HE XLR
Line output: Neutrik NC3MD-LX-HE XLR
Output: Neutrik NL4MP Speakon 4P
ASP principle of operation: analog active filtering and equalizing
Input impedance: 100kΩ
Crossover frequency: 150Hz
Filter slope: 24dB/oct
AMP principle of operation: UcD (Universal class D amplifier)
Output po er per amplifier module: 250W/4Ω, 180W/8Ω
Distortion (0 - 20kHz): 0.02% (0.002% at 1W/4Ω and 0.001% at 1W/8Ω)
2-tone intermodulation distortion: 0.01% (18.5kHz + 19.5kHz, 10W, 4Ω)
Output impedance: 15mΩ (f < 1 kHz), rising to 60mΩ (20kHz)
Band idth: 0 - 56kHz (+0/-3dB at all loads)
Amplifier gain: 28.4dB
Amplifier module efficiency: 92%
Total idle losses: approx. 16W
Internal supply: 400 W (600W peak)
Internal supply peak current during 90 seconds: 11.7A rms
Remote on/off: nominal 5Vdc/40mA, > 3.5Vdc pick-up (on), < 0.5V drop-out (off)
Mains: 220/230Vac 50Hz
Dimensions hxbxd: 50 x 236 x 290mm
daudio
van Keppelmarke 73
8016 GJ Z olle