SPL CROSSOVER

SPL Crossover

Two-way analog crossover with VOLTAiR technology.

Recommended for inserting one or two subwoofers into a stereo system.

Separation of bass and mid/high sections with cut-off frequencies adjustable from 50 to 120Hz in six positions.

The bass section has a fixed cut-off slope of 24dB, while for the mid/high section you can opt for 12dB or 24dB, or leave it flat.

Continuous phase adjustment 0-180°.

Possibility of using two subwoofers, one for the left channel and one for the right.

Possibility to insert a cut-off filter below 20Hz.

Subwoofer volume adjustment from -10 to +10dB via Alps RK27 Big Blue potentiometer.

Retro-look Vu-meter to display the level of the left and right input signals.

Both RCA and XLR input.

XLR outputs only.

VOLTAiR +/-60V technology with proprietary discrete op-amps.

Shielded toroidal transformer.

Trigger 12V IN/OUT.

Dimensions (LxHxD): 278x100x330mm.

Weight: 5.4Kg.

Finally an analog crossover again
It is difficult to optimally integrate bass speakers or subwoofers. At the moment, there are almost only digital crossovers for this purpose. But who wants to convert back and forth? You don't need that anymore. Our Crossover sets the crossovers again.

Crossing
The crossover is divided into two sections: the Low section for the bass speaker or subwoofer (mono or stereo) and the Mid-Hi section for the top/main speakers.

The crossover frequencies for Low and Mid-Hi can be set individually from 50 Hz to 120 Hz in 6 positions.
The Low filter has a slope of 24 dB per octave. The MID-HI filter slope can be switched from 12 dB (Butterworth) to 24 dB (Linkwitz/Riley).

In phase
Audio signals should come from the top speakers and the bass speakers or subwoofers in phase. The crossover provides variable phase control for this purpose.

Use the toggle switch to activate the phase control (phase 0° or phase -180°) and use the control to establish simultaneity.
If the phase control is not needed, it can be deactivated and thus disappears completely from the signal path.

One or two?
If you want to connect two bass speakers or subwoofers (one for L and one for R), this switch must be set to stereo.

If you are using only one bass speaker or subwoofer, switch to mono. The crossover creates a mono low frequency signal and sends it to both Low outputs (L + R).

On or off?
If you prefer to run the full range of the top/main speakers, you can turn off the MID-Hi filter.

Get rid of it
With the Low Cut filter all frequencies below 20 Hz can be filtered out with a roll-off of 6 dB. In this way, no inaudible low frequencies enter the power amplifier, which relieves it considerably.

As long as you're having fun
The playback volume of the bass speaker or subwoofer can be varied from -10 dB to +10 dB.

In addition to purely corrective adjustments to your speaker system, you can add more bass to recordings that lack low end.
"Happiness is when the bass kicks in."

Good old days
Two mechanical VU meters display the input levels for the left and right audio channels.
With the VU switch you can optimize the display for different signal levels.

Sources
The Crossover offers both balanced inputs with XLR jacks and standard inputs with gold-plated RCA jacks.

Low and medium high
On the output side, power amplifiers or active speakers as well as bass speakers or subwoofers are connected to the Low & Mid-Hi output sockets by means of balanced XLRs.
This means that even long cables to e.g. mono power amplifiers placed next to the speaker are possible without the risk of interference.

AMP CTL
The AMP CTL sockets are handy, to which you can connect up to four power amplifiers with 12V trigger inputs to switch them on and off together with the crossover.

The crossover itself can also be activated by a preamplifier such as the Director Mk2 or Phonitor x.