It is difficult to optimally integrate bass loudspeakers or subwoofers.
At present, there are almost only digital crossovers for this purpose.
But who wants to convert back to digital in an analog high-end playback chain?
Our Crossover sets the crossovers anew.
The crossover is divided into two section: The Low section for the bass loudspeaker 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 slope of the MID-HI filter can be switched from 12 dB to 24 dB.
Audio signals should come from the top speakers and bass loudspeakers or subwoofers in phase.
The crossover offers 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 simultaneousness.
If the phase control is not required, it can be switched off and thus disappears completely from the signal path.
If you want to connect two bass loudspeakers or subwoofers (one for L and one for R), this switch should be set to stereo.
If you only use one bass loudspeaker or subwoofer, switch to mono. The crossover creates a mono signal of the Low frequencies and outputs it to both Low outputs (L + R).
If you prefer to run the top/main speakers full-range, you can switch off the MID-Hi filter.
With the Low Cut filter all frequencies below 20 Hz can be filtered out.
This way, the power amplifier does not have to amplify inaudible low frequencies and the loudspeaker is relieved.
The playback volume of the bass loudspeaker or subwoofer can be varied from -10 dB to +10 dB.
In addition to the purely corrective adjustment of the speaker system, you can add more bass into recordings that lack low end.
“Happiness is when the bass kicks in.”
Two mechanical VU meters visualize the input levels for the left and right audio channel.
With the VU switch you can optimize the display for different signal levels.
The Crossover offers both balanced inputs with XLR sockets and standard inputs with gold-plated RCA sockets.
On the output side, the power amplifiers or active loudspeakers as well as bass loudspeakers or subwoofers are connected to the Low & Mid-Hi output sockets by means of balanced XLRs.
This means that even long cable runs to e.g. mono power amps placed next to the speaker are possible without the risk of interference.
The standby mode for up to four devices with 12V trigger input can be switched on and off via AMP CTL, together with the Crossover (AMP CTL Out). This is especially useful for connecting power amplifiers. But also the standby mode of the Crossover itself can be switched on and off by a preamplifier, such as the Director Mk2 or the Phonitor x, via AMP CTL (AMP CTL In).
With all devices of the Professional Fidelity series we develop not only according to plan, but also by ear. Many important components are installed on the circuit boards using THT technology. This way we can ensure that we can use the best sounding components.
The 120V technology is our reference technology. The 120V technology is unique in the world. It operates at a DC voltage of 120 volts. This is four times that of IC-based semiconductor op-amps. In our Professional Fidelity series, we refer to this unsurpassed technology as VOLTAiR technology.
The 120V technology works with +/-60 V. To be able to handle such a high voltage, we have developed special proprietary operational amplifiers that can operate with a DC voltage of +/-60 V: the SPL 120V SUPRA operational amplifiers.
This high voltage would destroy conventional components and operational amplifiers.
By the way, the “120V” in the name of the technology has nothing to do with the local mains voltage from the mains power socket. This is about the operating voltage inside the device with which the audio signals are processed.
The mains voltage from the mains power socket is transformed to the required secondary voltage in the device’s internal linear power supply with toroidal transformer. Rectifiers convert this AC voltage into DC voltage required in the audio device.
VOLTAiR is a composition of the terms Volt and Air.
Volt is the unit for electrical voltage and Air stands for the unlimited space the music can breathe in.
VOLTAiR symbolizes the perceived limitless dynamics resulting from high audio voltage.
What exactly is that?
And what does it do?
Good questions need good answers.
And that’s what the 120V technology (VOLTAiR) video gives you.
Most audio devices work with an internal operating voltage of +/-15 volts and can thus process a maximum input level of +21.5 dBu. If a DAC, for example, has an output level of +22 dBu at 0 dBFS, level peaks of the music material would already cause overloads in the input stage of the device.
All components in the audio device often operate at their limits. The result is an unsteady sound that causes stress and faster ear fatigue.
SPL devices with VOLTAiR technology can handle input levels of +32.5 dBu thanks to the higher internal operating voltage of +/- 60 volts – thus offering 12dB more headroom. All components consequently operate continuously in the optimum operating range. The result is a very pleasant, natural and relaxed sound experience. So you can enjoy your music in every detail.
These diagrams clearly show the superiority of the VOLTAiR technology in comparison to other circuits with lower, common operating voltages.
That’s why we manufacture all SPL devices in our own production facility in Niederkrüchten on the Lower Rhine, Germany.
In the lab, we pitted Phonitor xe against the best audio measurement system and found that Audio Precision could not measure VOLTAiR technology.
Reference: 0 dBu = 0,775V. All specifications are subject to change without notice.
The product is in stock in our warehouse in Niederkrüchten, Germany, and will be shipped the same or next working day.
We process the orders after receipt of the order and update the stock in the online shop regularly. If the product is no longer available at short notice due to high order volume, you naturally have the right to withdraw from the purchase (see Right of Withdrawal).
In any case, you will receive an e-mail with details of the delivery and the estimated delivery time.
The product is not in stock in our warehouse in Niederkrüchten, Germany. Usually it will be available again within 5 working days.
Due to the current pandemic and the associated worldwide shortage of components, delivery times may be significantly delayed in some cases.
In any case, you will receive an e-mail with the details of the delivery and the estimated delivery time.
Of course you have the right to withdraw from your purchase (see Right of Withdrawal).
Das Produkt ist in unserem Lager Niederkrüchten vorrätig und wird noch am selben oder nächsten Werktag versendet.
Wir arbeiten die Bestellungen nach Bestelleingang ab und aktualisieren den Bestand im Online-Shop regelmäßig. Falls das Produkt wegen hohem Bestellaufkommens kurzfristig nicht mehr verfügbar ist, hast du selbstverständlich das Recht, vom Kauf zurückzutreten (siehe Widerrufbelehrung).
In jeden Fall erhältst du eine E-Mail mit den Einzelheiten der Lieferung und der voraussichtlichen Lieferzeit.
Das Produkt ist in unserem Lager Niederkrüchten nicht vorrätig. Gewöhnlich ist es innerhalb von 5 Werktagen wieder verfügbar.
Aufgrund der aktuellen Pandemie und der damit verbundenen weltweiten Bauteileverknappung kann sich die Lieferzeit z.T. stark verzögern.
Auf jeden Fall erhältst du eine E-Mail mit den Einzelheiten der Lieferung und der voraussichtlichen Lieferzeit.
Selbstverständlich hast du das Recht, vom Kauf zurückzutreten (siehe Widerrufbelehrung).
Due to Covid19 there are no events scheduled at this time.
Aufgrund von Covid19 sind derzeit keine Events geplant.