FAQ

You can enable the infrasonic filter to remove the frequencies below 15Hz that would not be reproduced by your system anyway. This releases some reserve in the amplifier and the speaker cone. The infrasonic filter is only active in a calibrated unit.

Yes, you can use daisy-chaining or Y-splitter to connect more than one subwoofer. Anti-Mode X2 measures and corrects the combined response of the speakers, subs, and the room. It doesn't know or care about how many subs you have connected. You don't need to adjust the sound pressure each subwoofer produces to be equal at the listening position. It is often best to have the subs at the same volume setting, so that one sub doesn't distort earlier than another.

There are 5 choices for the transition frequency fo the bass, treble and mid-range filters. The default cut-off frequencies for the bass filter are: 80 Hz, 120 Hz, 200 Hz, 320 Hz, 500 Hz. The default cut-off frequencies for the treble filter are: 1.5 kHz, 2 kHz, 4 kHz, 8 kHz, and 12 kHz. The default Q values for the mid-range filters are: 2.00, 1.00, 0.50, 0.25, and 0.15. The Q-value adjusts the mid-range filter bandwidth (the smaller value, the wider bandwidth: b_w = f_c/Q).

Copying settings is possible using a USB memory stick connected to the service port. 1. Navigate to the "System Information" menu 2. Press remote keys B A C bass 3. A screen comes up with options to create a firmware file, to create memory dump, or read a memory dump. Press C four times to dump memory, or A four times to read the memory dump. 4. When done, remove the USB memory, then the power cord. The memory dump doesn't contain renamed inputs.

The "subwoofer between speakers" configuration assumes the subwoofer is near the speakers, and the "subwoofer on the side" assumes the subwoofer can be anywhere in the room. This affects the choice of the automatic crossover frequency. When the subwoofer is near the speakers, there is less chance of the subwoofer becoming localized even with a higher cross-over. When the subwoofer is standing "alone", a high crossover is avoided, even when the subwoofer(s) could reproduce with less distortion than the speakers. If you use the advanced calibration mode and thus set the cross-over manually, there is no difference between the speaker configurations.

There are dozens of ways to add Anti-Mode 2.0 to your existing High-End system. You can also use Anti-Mode 2.0 Dual Core as the heart of your system and build a next generation audio system around the device for extreme sound quality and simplicity. There are three main categories considering how to utilize Anti-Mode 2.0 Dual Core: A) Stereo room correction: To correct an existing 2-channel audio system, consisting of 2 full range loudspeakers, or a 2.1 system with loudspeakers and a subwoofer, or a 2.2 system with loudspeakers and two subwoofers. B) DAC/Pre-amp with room correction: To use Anti-Mode 2.0 Dual Core as the heart of the 2.0, 2.1 or 2.2 system. C) Subwoofer correction: To correct and control a single subwoofer or an array of several subwoofers. Connecting the DSPeaker Anti-Mode 2.0 Dual Core is straightforward, as all the inputs and outputs are independent, making Anti-Mode 2.0 Dual Core capable of not only basic imaginable connections, but also some quite interestingones. The list of all possible combinations are: Analog XLR in -> Analog XLR Out (basic analog balanced) Analog XLR in -> Analog RCA Out (basic analog balanced/unbalanced) Analog XLR in -> S/PDIF Out (Balanced archiver A/D mode) Analog RCA in -> Analog XLR Out (analog balancer mode) Analog RCA in -> Analog RCA Out (basic analog unbalanced) Analog RCA in -> S/PDIF Out (Unbalanced archiver A/D mode) S/PDIF in -> Analog XLR Out (Balanced DAC mode) S/PDIF in -> Analog RCA Out (Unbalanced DAC mode) S/PDIF in -> S/PDIF Out (Pure Digital de-jittered) USB in -> Analog XLR Out (Balanced USB-DAC mode) USB in -> Analog RCA Out (Unbalanced USB-DAC mode) USB in -> S/PDIF Out (Pure Digital USB to S/PDIF de-jittered) The only restriction is not to connect RCA and XLR inputs simultaneously. XLR and RCA outputs on the other hand, can be connected simultaneously (handy for 2.1/2.2 system or when correcting an array of 4 subwoofers). Connecting Anti-Mode 2.0 A system can be divided to these basic parts: 1. Sources (CD-Player, Vinyl, Computer etc.) 2. Pre-Amplifier stage 3. Power amplifier stage 4. Speakers In some systems #2 Pre-amplifiers and #3 Power amplifiers are combined, forming an Integrated amplifier. In some systems #3 Power amplifiers and #4 Speakers are combined, forming Active speakers. In the following examples, note than analog in and analog out can be either XLR or RCA, and they don't need to be the same (the input of the Anti-Mode 2.0 can be RCA and the output can still be XLR or vice versa). The only rule is not to connect both XLR and RCA inputs simultaneously. Examples: Using Anti-Mode 2.0 Dual Core as a DAC / Pre-amp This is the simplest and one of the best way to use Anti-Mode 2.0 Dual Core. Source(s) -> Anti-Mode 2.0DC inputs (USB,S/PDIF,Analog), Anti-Mode 2.0DC analog out -> Power amplifier/active speakers analog input Using Anti-Mode 2.0 Dual Core in a system with pre-amp and power amp or active speakers: Connection method 1: Pre-Amplifier analog out -> Anti-Mode 2.0DC analog in, Anti-Mode 2.0DC analog out -> Power amplifier/active speakers analog in This connection method has the advantage that all the sources in the existing pre-amp can be corrected and controlled, but as the analog pre-amplifier boosts the signal, the user needs to make sure that the signal doesn't clip at the input of the Anti-Mode 2DC. Connection method 2: Source(s) output (analog,S/PDIF,USB) -> Anti-Mode 2.0DC input (analog,S/PDIF,USB), Anti-Mode 2.0DC analog out - > Pre-amp analog in ->Power amplifier/active speakers analog in This connection method is recommended if all the sources can be directly connected to the 3 inputs of the Anti-Mode 2.0DC. The advantage of this method is, that the analog input is fixed instead of variable voltage, which makes it easier to avoid clipping. In this method, one should also consider removing the existing pre-amp from the system completely, and use the Pre-amp and volume controller features of the Anti-Mode 2.0DC instead. Using Anti-Mode 2.0 Dual Core in a system with Integrated amplifier Integrated amplifiers with separated pre- and power stages behave like a system with separate power amplifiers. Integrated amplifier analog pre-out -> Anti-Mode 2.0DC analog in, Anti-Mode 2.0DC Analog Out -> Integrated amplifier analog pre-in Integrated amplifiers with tape-loop Integrated amplifier tape-out -> Anti-Mode 2.0DC analog in -> Anti-Mode 2.0DC Analog Out -> Integrated amplifier tape-in If the integrated amplifier has neither of above, you can still connect sources directly to the Anti-Mode 2.0DC. Source(s) -> Anti-Mode 2.0DC inputs (USB,S/PDIF,Analog), Anti-Mode 2.0DC analog out -> Integrated amplifier analog input Using Anti-Mode 2.0 Dual Core to correct a 2.1 or 2.2 system You can use the Measurement tool within Anti-Mode 2.0DC to adjust the optimal level, cross-over and phase of the subwoofer(s). Note: in this setup the cross-over of the subwoofer must be used instead of ones in Anti-Mode 2.0 Dual Core. Source(s) -> Anti-Mode 2.0DC inputs (USB,S/PDIF,Analog), Anti-Mode 2.0DC analog XLR out -> power amplifiers/active speakers, Anti-Mode 2.0DC analog RCA out -> active subwoofer(s) Using Anti-Mode 2.0 Dual Core in Pure Digital Mode In this scheme, another DAC is converting the signal to analog. Source(s) -> Anti-Mode 2.0DC inputs(USB,S/PDIF), Anti-Mode 2.0DC S/PDIF out -> DAC S/PDIF input Using Anti-Mode 2.0 Dual Core for subwoofer correction Single subwoofer: AV-Receiver LFE output -> Anti-Mode 2.0DC left analog input, Anti-Mode 2.0DC left analog output -> subwoofer input Two subwoofers: AV-Receiver LFE outputs -> Anti-Mode 2.0DC analog input, Anti-Mode 2.0DC analog output -> subwoofer inputs Note: Two subwoofers can be calibrated for 0.2 stereo playback, or for 0.2 dual-mono. In dual-mono operation, left input is fed to both left and right subwoofer outputs. Four subwoofers: AV-Receiver LFE outputs -> Anti-Mode 2.0DC analog input, Anti-Mode 2.0DC analog RCA output -> subwoofers 1 and 2 inputs, Anti-Mode 2.0DC analog XLR output -> subwoofers 3 and 4 inputs. The subwoofers with longer cabling are recommended to be connected to the XLR terminals. Subwoofers on the same side of the room should be connected to the same output channel (left/right), if desired in 0.2 stereo.

Connecting Anti-Mode 8033 series unit into any system is very straight-forward, see the Anti-Mode connection examples here BASIC HOME CINEMA SETUP Standard Home Cinema configuration. Anti-Mode 8033 is connected between the AV-receiver/pre-processor and the subwoofer using one RCA cable. 2.1 STEREO SETUP WITH SUBWOOFER No Sub-Out in Receiver Connecting Anti-Mode 8033S-II into a 2.1 system with stereo pre-outs available. Note: only Anti-Mode 8033S-II has the required stereo input. STEREO SETUP (2.1) Only Speaker-Level Outputs Connecting Anti-Mode 8033 into a 2.1 system without stereo (or mono) pre-out. This connection requires a speaker-level to line-level adapter. The DSPeaker adapter is discontinued, but you can find alternatives by searching for "speaker level to line level converter". SHARED SUBWOOFER FOR STEREO & HOME THEATER Connecting Anti-Mode 8033S-II into a system with two alternative input sources: one LFE and two stereo pre-outs. Note: this connection requires the Anti-Mode 8033S-II version and the DSPeaker stereo-to-mono summation adapter (Not the same as Y-cable). TWO SUBWOOFERS (Dual Mono) Connecting two subwoofers (reproducing the same mono/LFE signal) into a single Anti-Mode 8033 can be done with an RCA Y-cable. If the subwoofer(s) have invertable/adjustable phase setting, see the next example. CONNECTING TWO SUBWOOFERS WITH ONE ANTI-MODE Connecting a single Anti-Mode 8033S-II into two subwoofers (reproducing the same mono/LFE signal) can be done by utilizing the secondary 180 degree output of the Anti-Mode 8033S-II, but only if the corresponding subwoofer has phase inversion switch or adjustable phase to + or - 180 degrees. TWO SUBWOOFERS (Stereo) Connecting Anti-Mode 8033 into a setup with stereo subwoofers. This configuration requires two 8033 units, either 8033S-II or 8033cinema. BALANCED XLR OUTPUT If the subwoofer supports balanced XLR inputs, it is adviced to connect the Anti-Mode 8033S-II into the subwoofer using balanced connection. The balanced XLR adapter is sold in our webstore, or it can be built as instructed: (RCA 0-out to XLR pin 2, RCA 180-out to XLR pin 3, RCA ground to XLR pin 1) FOUR SUBWOOFERS A single Anti-Mode 8033S-II can easily correct even four subwoofers, when 180 degree output is utilized with two additional Y-cables. Although similar configuration could be achieved by splitting the signal of a single output into 4 identical outputs (via for example 3 Y-cables), the presented configuration here is recommended because of the output impedance.

The 8033 has insignificant delay of 2.7ms which is inaudible at low frequencies. For comparison, the additional delay of room modes can be more than 500ms, which is eliminated by Anti-Mode correction.

The current Lifting setting (25Hz/35Hz/Flat) can be stored by pressing and holding the "Lift" button for 3 about seconds. A small "beep" sound is played to confirm that the setting was stored. This stored setting will be automatically selected as default when 8033 is powered up.

First calibrate the subwoofer with 8033 to suppress modes and achieve flat frequency response. Then run the calibration program of the AV-receiver so that it can "see" the corrected subwoofer, and obtain the right level, phase (delay) and cross-over frequency for integration with main speakers.

The distance setting of the AVR is in fact a relative delay setting. The delay consists of three main components: physical inertia, electronic delay and propagation delay. All these delays are visible to the setup program of the AVR. Because of this, the AVR will detect the correct amount of delay in it's setup when using Anti-Mode, and it will automatically compensate for the small delay introduced by the 8033. If the AVR has no automatic setup, or if for some reason manual approach is preferred, the distance to add into the subwoofers "distance" setting is about 3 feet (0.9m). For example if the distance of the subwoofer was 12 feet before 8033, then it should be set to 15 feet after the 8033 is connected into the signal chain.

You simply connect them as follows: RCA 0-out to XLR pin 2 RCA 180-out to XLR pin 3 RCA ground to XLR pin 1

Yes, the corrections are stored in the units EEPROM memory. It doesn't matter how long the unit is without power, the settings are safe. The lifting setting can also be stored in the memory by pressing and holding the lift button (while the desired setting is active) for a few seconds until the 'beep' sound is heard.

The curves for Lifting 25Hz, 35Hz and flat states are in here:

A brief guide for solving problems related to electronic interference can be found here. http://www.jensen-transformers.com/an/an004.pdf

This is essentially same, as compensating the level for the removed modal energy, and the distance for the added A/D-DA delay. Also, the cross-over can usually be set higher to correct the modal resonances up to a higher frequency without getting localization of the subwoofer. First calibrate the subwoofer with 8033 to suppress modes and achieve flat frequency response. Then run the calibration program of the AV-receiver so that it can "see" the corrected subwoofer, and obtain the right level, phase (delay) and cross-over frequency for integration with main speakers.

The Anti-Mode algorithm in 8033 is capable of designing unconstrained custom-tailored sets of filters. All the filters except liftings are automatically controlled by 8033. There are total of 24 custom-tailored filters designed by counter-room algorithm and 2 user-activated filters in 3 different configurations. A single counter-room filter has virtually unrestricted space for parameters (for example, the maximum Q-value is over 1000). Additionally there is 1 digital subsonic filter (bypassable) and 1 analog noise-shaping filter at the DAC to enhance SNR.The contribution of the filters is in detail. The filters are contributed in detail: 15 custom-design digital Anti-Modal oscillators 6 custom-design digital Anti-Modal oscillators reserved for multipoint/ fine tuning in 1-point. 3 custom-design restricted-constraint digital IIR emphasizing bandpass filters 2 alternative user-activated emphasizing lowpass digital IIR filters (15-25Hz / 25-35Hz / off) 1 infrasonic digital IIR filter (active only when lifting is used) 1 analog noise-shaping Bessel-filter (always active)

Check that the microphone is connected well into the mic input. Only use the included microphone. Check that the microphone is in tact. This can be done by calibrating and putting the microphone very close to the subwoofers cone. If the microphone is functioning, the Anti-Mode should decrease the volume of the measurement signal and signal this with blinking led. Check that the volume is sufficient. You should be able to hear the calibration signal. If you change the volume of the subwoofer, only do it before, not during the calibration. When you evaluate the result and compare it to the bypassed, remember to do it at the position where the calibration was done to.

Anti-Mode compensates for 16-144Hz, but it will pass trough any range between 5 and 160Hz.

One Anti-Mode can be used for any number of subwoofers as long as they have common signal. If the two subwoofers have separate stereo signals, two Anti-Modes are needed.