Legacy Wavelet II User manual

Legacy Wavelet II
Owners Manual

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Table of Contents
Owners Record ............................................................................................................................................................................. 3
Quick Setup .................................................................................................................................................................................. 4
Wireless Setup.............................................................................................................................................................................. 5
Connections.................................................................................................................................................................................. 6
Specifications ............................................................................................................................................................................... 7
Wavelet App Controls ................................................................................................................................................................... 9
Contour Settings Explanation...................................................................................................................................................... 11
Room Correction Setup ............................................................................................................................................................... 12
Ping channels ....................................................................................................................................................................................................................................... 13
Manual Channel Level Adjustments..................................................................................................................................................................................................... 13
Running Room Correction .................................................................................................................................................................................................................... 14
Optimizing Analog Inputs ........................................................................................................................................................... 17
Wavelet Accessories ................................................................................................................................................................... 18
Designer Notes ........................................................................................................................................................................... 19
Troubleshooting ......................................................................................................................................................................... 22
Warranty ................................................................................................................................................................................... 25
Care ........................................................................................................................................................................................... 26

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Owners Record
Thank you for selecting the Legacy Wavelet II. The serial number is located on the rear of the unit. Record this number in the space
provided below. Refer to this when calling your dealer regarding this product.
Register your product at www.legacyaudio.com/register
Model: Wavelet II
Serial No: _____________________
Date of purchase:_______________
Thank you for listening with Legacy Audio. These hand-crafted instruments will provide you with many years of listening enjoyment.
Share your Legacy Audio system with the Legacy community. Post your Legacy experience and system photos at
www.facebook.com/legacyaudio . Like the page to receive the latest Legacy announcements.

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Quick Setup
Wavelet features can be remote controlled via smart device, smart phone or other mobile device. In order to perform room correction,
please connect the unit to the internet. We love controlling the system with an iPad Mini sized screen.
What happens if my internet goes out? Don’t worry- the Wavelet remote functions continue to work and room correction settings are
maintained, even without an internet connection. An internet connection is only necessary for the initial setup and all settings are
retained inside of Wavelet- even if the internet is out your system will work as designed.
There are two ways to connect your device and control Wavelet- wirelessly with the included WiPi stick or wired. If you have an
ethernet cable available and connected to your router, we recommend a wired connection- it is the quickest way to connect. This
Quick Setup walks you through a wired connection. Please visit Wireless Setup for WiFi instructions.
a. With your Wavelet powered off, locate the included Ethernet to USB Adaptor.
b. Connect the Ethernet to USB Adaptor to the top USB Communication at the rear of the Wavelet
c. Attached one end of the ethernet cable to the Ethernet to USB Adaptor. The other end should run to your router. (If you have
an ethernet cable run near your Wavelet but are using the cable for a streamer, you can purchase an inexpensive Ethernet
Switch, about $15 at your local electronics store, to expand the number of ethernet connections)
d. After connecting your cables, power Wavelet On. Have a piece of paper and a pen nearby- once Wavelet turns on, you will see
an IP Address scroll across the screen, please notate it. IP Addresses look like 192.168.1.199 (the screen may display IP Error
momentarily, this is normal as Wavelet sets up.)
e. Once Wavelet displays an IP Address, it has successfully connected to your router. Please open your internet browser on any
device (phone, tablet, computer) and enter the IP Address into the address bar, and press Enter or Go
f. The Wavelet Remote is now displayed

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Wireless Setup
*Note- if you’ve completed the wired ethernet connection in the Quick Setup above, you can disregard this wireless setup section.
First, let’s teach your Wavelet what your SSID and Password are, so Wavelet can connect to your internet.
a. To connect your Wavelet to the internet, please insert the included USB SanDisk memory stick into the USB port of your PC
or Mac, open a browser on your PC or Mac, and visit http://bohmeraudio.com/setup.html
b. Enter your SSID- this is your Wifi Network name.
c. Enter your Wifi Network Password and click “Download wifi-conf.txt file”
d. Insert the included SanDisk USB memory stick into your computer.
e. When prompted to “Open” or “Save File” choose “Save
f. File” click “OK”.
g. Copy the “wifi-conf.txt file to the root directory of the SanDisk USB memory stick. Depending on your browser settings, you
might find the file downloaded to your Desktop or Downloads folder. After locating it, right click the file and choose copy.
Navigate to the SanDisk USB memory stick and paste the file into the main ”root directory” so that when you click on the
SanDisk USB drive from your computer, the file is visible and not placed within another folder. Please confirm the file title is
wifi-conf.txt and does not have any numbers added. If it does, please remove the numbers from the title. You may now remove
the SanDisk USB memory stick from your computer.
h. Power off your Wavelet. Insert the SanDisk USB memory stick into the port located at the back of Wavelet labeled WLAN
USB Stick. Power Wavelet back on and wait 1 minute. The system is saving your wifi network to memory.
i. After 1 minute, power Wavelet off, remove the SanDisk USB memory stick and insert the WiPi WiFi Stick into the port
located at the back of Wavelet labeled WLAN USB Stick.
Now we will open the WiFi remote. Please use the device you wish to control Wavelet with- we recommend an iPad or iPhone. Any
smartphone, smart device or computer will work.
a. First, make sure that your device is connected to the same WiFi network your Wavelet is connected to. (On Apple devices,
click Settings, Wi-Fi, and choose the appropriate network)
b. After connecting your cables, power Wavelet On. If you’re Wavelet is already on, please power it off and wait 10 seconds to
turn Wavelet on. Have a piece of paper and a pen nearby- once Wavelet turns on, you will see an IP Address scroll across the
screen, please notate it. IP Addresses look like 192.168.1.199 (the screen may display IP Error momentarily, this is normal as
Wavelet sets up and your router searches for it.)
c. Once Wavelet displays an IP Address, it has successfully connected to your router. Please open your internet browser on any
device (phone, tablet, computer) and enter the IP Address into the address bar, and press Enter or Go
The Wavelet Remote is now displayed

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Connections
The Wavelet comes pre-programmed from the Legacy factory with algorithms for your selected speaker. If you are using the Wavelet
with a Legacy speaker, please consult the respective manual for specific connection information & diagrams.
A connections assignment printout is also included in the Wavelet box to assist you in getting started.
Wavelet Preamplifier/DAC/Crossover/Room Correction Processor Inputs

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Specifications
Inputs
•Analog
oTwo pairs of Stereo balanced inputs on XLR connectors.
Input sensitivity without attenuation 0 dBFS*1 = 1 dBV*2, input impedance 20 kOhm.
Analog attenuation available in three steps of -3 dB, -6 dB and -12 dB for an input sensitivity of
respectively 0 dBFS = 4 dBV, 7 dBV or 13 dBV.
oTwo pairs of Stereo unbalanced inputs on RCA connectors.
Input sensitivity without attenuation 0 dBFS*1 = 1 dBV*2, input impedance 100 kOhm.
Analog attenuation available in three steps of -3 dB, -6 dB and -12 dB for an input sensitivity of
respectively 0 dBFS = 4 dBV, 7 dBV or 13 dBV.
oOne XLR Measurement microphone input, 48 Vdc Phantom power.
•Digital
oAsynchronous USB audio, 32 bits, 44.1 –384 kHz. ASIO driver required for 32 bit operation on PC.
oAES/EBU, 24 bits, 44.1 –192 kHz.
oSPDIF, 24 bits, 44.1 –192 kHz.
oTosLink, 24 bits, 44.1 –96 kHz.
Outputs
•Analog
o8 balanced output channels on 8 XLR connectors. 0 dBFS*1 = 8 dBV*2, 33 Ohm output impedance.
An analog output level increase of 6 dB is available through internal jumpers offering 0 dBFS = 14 dBV.
o8 unbalanced output channels on 8 RCA connectors. 0 dBFS*1 = 8 dBV*2, 33 Ohm output impedance.
Ctrl. Interface
•REST control API over Ethernet.
•Control4 driver available.
•Trigger input and output, 12Vdc on, 0Vdc off.
Processor
•Analog Devices, internal processing sample rate 192 kHz, bit depth 64 bits.
•Bohmer Correction is a Loudspeaker In-room Energy-Time alignment that optimizes the loudspeaker
room acoustic transfer function in both frequency and predominantly time domain. Working with
revolutionary new algorithms it starts with a psychoacoustically based measurement method.

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Alignment errors are then optimized individually, not resorting to common crude bulk correction over
the entire frequency spectra. The Algorithms use psycho acoustic reasoning for alignment and
correction of the loudspeaker room transfer function. The correction improves sound quality in the
whole room, provides improved transient response, clarity & sound staging and gives a relaxed sound
without rough edges or any booming.
Dimensions (HxWxD, inches): 4.125 x 17.5 x 12
Weight 13.5 lbs.
*1dBFS - Decibels Full Scale, referenced to AD converter full scale input or DA converter full scale output. An output level of 0 dBFS is the maximum
output voltage available from the DA converters.
*2dBV - Decibels Volt, referenced to 1 Vrms. A 0 dBV input signal has a signal level of 1 Vrms.

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Wavelet App Controls
After performing either the Quick Setup or Wireless Setup, above, you can fully control your Wavelet. Please open a browser on your
smart device, smart phone, or computer. Here we have opened Safari on and iPad. In the address bar, enter the IP Address that
displays on your Wavelet during startup, and click Enter or Go- here the IP Address is 192.168.0.105
Tip: You can bookmark this page for future use. The bookmark
button on Apple devices is the square and arrow at the bottom of the
screen. Please press this button and choose Add Bookmark. Note- if
you change internet service or routers, your IP Address may
change- you can confirm your current IP Address by shutting down
Wavelet and writing down the current IP Address when powering it
back on.
The Wavelet Dashboard features most controls.
Volume can be adjusted by placing your finger on the slider,
moving it, and releasing your finger to update the volume. You can
use the Fine Volume Control for precise adjustments
Mute Button mutes signal at the outputs
Inputs (RCA 5 & 6 here) can be adjusted by clicking the drop down
menu
Bypass enables Home Theater Bypass Mode- this can be loud, so
please confirm that your Home Theater Processor Volume is low
Room Correction can be toggled Off/On, once Room Correction
Setup has been performed

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Apodizing allows you to choose between and Apodizing and Linear
DAC modes. The Wavelet features an apodizing circuit that corrects
for the pre-ringing native to CODECs. Analog lovers can take
advantage of balanced XLR or unbalanced RCA inputs without
concern of digital artifacts. Turn on the apodization circuit by
choosing “Apodizing”. When unchecked, the DAC is in linear
mode, and the apodization circuit is bypassed. We recommend the
Apodizing mode.
Omnio switches the Omnio technology in and out. Omnio improves
channel separation and restores the directional vector relationship to
depth and position cues.
M1-M8 are 8 recallable contour presets, which will bring up the
saved contour settings underneath. save the contour sections at the
bottom of the remote, to up to 8 recallable settings. You can click
Info to see what has been saved. Clicking the Save button and
choosing a location will save the currently set contour settings.
Contour Settings
The sliders can be adjusted in the same way as the volume control-
by placing a finger on the center slider. Moving to the right creates a
boost (more volume) and moving to the left creates a cut (less
volume) in the given frequency band.
The most recent slider settings are retained permanently in the
Wavelet memory- even if you turn the unit off, Wavelet will
remember your settings.

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Contour Settings Explanation
Before adjusting the contour settings, we recommend
performing Room Correction on the Settings Page
Brilliance: controls the "air" and definition of a recording
above 10kHz
Low-Treble: adjusts the brightness or forwardness above 3kHz
Upper-Bass: adjusts the fullness or bloom of vocals, cello, etc.
below 300 Hz
Mid-Bass: determines the apparent speed of decay of bass
frequencies. Reducing will tighten, slight boosts will warm
below 150 Hz
Low-Bass: adjusts the overall weight or heaviness below 75
Hz
Punch: controls the drive or impact felt from the rhythm at 55
Hz
Most speakers benefit from a boost of about +2.5 dB in the brilliance, a low-bass setting of +2 dB with the punch slider set at +2.5
dB.
Pressing Reset Sliders will return all contour sliders to 0.

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Room Correction Setup
Click the Settings button at the top. In settings, you can adjust the default startup volume level, front panel brightness, and select
system update, to check and download the latest Wavelet software version.
Begin by choosing Setup.

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Ping channels
Please verify that your cables are correctly connected. Set the volume to at least 85, and slowly ping channel 1- you should hear output
at the correct section of your speaker. Follow the included connection diagram, and ping channels to confirm bass, treble, and any sub
connections are correctly connected.
Manual Channel Level Adjustments
Click manual channel level adjustments. This allows you to adjust the volume for each pair of Wavelet’s outputs. This is handy if you
have an external amplifier with low gain- you can increase the volume to match the gain of the other amplifiers in your system.

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Running Room Correction
After you have pinged channels to confirm correction connections, you are ready to setup room correction. Click Settings, Setup,
Room correction. Your new Wavelet comes with the microphone file preloaded, so you can click Continue with setup.
The on screen instructions will guide you through the process of using the included microphone to capture measurements.

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After measuring the left channel, Recording successful will display at the bottom of the screen. If you see an error such as “Volume
too low,” please check the connections and/or increase the level and measure the left channel again. A successful left channel
measurement will display “Recording successful.” at the bottom of the screen, as shown above.
Repeat the process for your right speaker. Finally, click Upload to server- this sends the measurements to the room correction server
which calculates the ideal settings for your speakers and automatically sends them back to your Wavelet.
After a few minutes, you can observe progress by clicking Check server progress at the bottom of the screen. This process may take 5
- 10 minutes. You will be prompted when the process is complete.
Room Correction can now be toggled off and on, during playback, from the Wavelet Dashboard.

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USB Playback
Wavelet can be used as a USB DAC, with any Mac/PC or other device that interfaces with the USB 2.0 Audio specification.
Connect one end of the included USB cable to the back of Wavelet, and the other end to your playback device. Please make sure
Wavelet is turned on, before starting playback program or sending digital audio to it. Digital source components (USB, SPDIF,
TosLink, AES/EBU) should be powered on after Wavelet.
Select USB from the Wavelet Dashboard or the front panel input selector. Wavelet will automatically be recognized.
Depending on your playback device, you may need to select Wavelet from the sound output settings on your computer.
In Tidal, for example, you simply click the speaker logo at the bottom right corner, and select Wavelet for playback.

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Optimizing Analog Inputs
When using the analog inputs it is useful to optimize the input levels according to how they are being used. This will maximize the
signal to noise ratio and provide optimal gain while preventing distortion from input overload.
Outboard DAC to Wavelet Analog Inputs Using Wavelet as your Preamplifier
The Wavelet has adequate internal gain for virtually any outboard DAC ouput. In some cases you may wish to decrease the input
sensitivity of the Wavelet to accommodate an external DAC with high output level, especially if your are using one with a volume
control. Each stereo pair of analog inputs of the Wavelet can be adjusted downward in -3, - 6, or -12dB steps as shown below. The
goal is to set the analog channel’s input sensitivity so that adequate volume level is achieved from your system without any audible
clipping of the inputs. When adjusted properly, the Wavelet’s blue front panel display will usually be in the range of 85dB for average
listening levels. When using the Wavelet’s digital inputs such as the SPDIF from a CD transport, adjustments are not required - thus
there are no provisions for such. Some computer hosted media software may introduce an extra level control stage to the USB output.
In this case it is best to configure the software settings so a typical listening level is accomplished with Wavelet displaying 85dB.
Outboard Preamp Driving Analog Inputs Using Wavelet for Crossover/Room Correction
If you are relying on an external preamplifier to provide the both the master gain and level control into the Wavelet, you will need to
optimize the inputs sensitivity of the Wavelet’s analog inputs. The key is be certain that the highest volume from the preamp does not
overload the analog inputs. We recommend beginning
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with the -12dB setting initially as shown below. Further attenuation of -3, -6dB is available if needed. While you can also further
reduce the volume setting from your preamp, the goal is totally avoid clipping at all levels. Again try to establish a Wavelet level
setting of about 85dB for typical listening. With a little care you will have minimized your noise floor and prevented input saturation.
Rarely does the Wavelet need to be set above 90dB when optimizing to the volume settings familiar from your preamplifier.
Rear Panel View of Resistive Switches

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Wavelet Accessories
Inside the Wavelet processor carton packaging you’ll find the included measurement microphone, and a 25 ft. XLR mic cable. At the
opposite end of the carton you will find a power supply with a five pin locking connector and its 115 V AC cable, a compact remote
volume control, a Wi-Pi WiFi wireless network connector or WiFi antennae and a SanDisk USB memory stick. A robust USB A/B
cable is also included, to connect to a computer.

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Designer Notes
Why is Room Correction Necessary?
To the left is a 2 dimensional simulation of a 1ms wave pulse from a
pair of conventional speakers into a room similar to the above.
Because the dispersion exceeds 60 degrees, undesirable energy from
each speaker is reflected back into the room within a few thousandths
of a second. This reflected energy is out of sync with the original
signal.
A few milliseconds later, the first wave-front is about to reach the
listener, while the reflected energy is close behind. These early
reflections alter the original tonal balance. As they occur within the
fusion time window, the brain cannot separate the sounds.

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After less than 1/100th of a second, the room has developed a
complex wave pattern with energy varying with room position. The
listener is now awash in a series of wave-fronts which will soon
reflect off the wall behind.
A mere 5 milliseconds later, the initial direct wave-front has now
reflected off the rear wall and has made its way back to the listener.
The listener will perceive this reflection as additional bass energy,
though a standing wave has not had time to develop.
It is a common misconception that such low frequency excess energy
is merely the result of inevitable resonances within the room, when a
large portion can be attributed to initial reflections.